Journal articles: 'Sitophilus zeamais (Mots.)'

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Potenza, M. R., V. Arthur, J. D. Felicio, et al. "EFEITO DE PRODUTOS NATURAIS IRRADIADOS SOBRE SITOPHILUS ZEAMAIS MOTS. (COLEOPTERA: CURCULIONIDAE)." Arquivos do Instituto Biológico 71, no. 4 (2004): 477–84. http://dx.doi.org/10.1590/1808-1657v71p4772004.

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RESUMO A presença de Sitophilus zeamais ocasiona prejuízos pela redução severa de peso, depreciação do valor comercial do produto e redução de seu valor nutricional, atuando ainda como agente disseminador de fungos, favorecendo a deterioração do produto armazenado, em razão do aumento da umidade e da temperatura da massa de grãos, devido ao metabolismo dos insetos. O presente trabalho teve por objetivo avaliar o efeito dos extratos aquosos, hexânicos e etanólicos irradiados de Solanum paniculatum, Dahlia pinnata, Pennisetum purpureum, Allamanda cathartica, Dieffenbachia brasiliensis, Lavandula angustifolia, Rhododendron simsii, Annona squamosa, Agave angustifolia, Ocimum basilicum, Coffea arabica e Hibiscus rosa-sinensis, a fim de identificar novas substâncias para o manejo integrado de pragas (MIP) e observar possíveis efeitos da radiação gama como o aumento, redução, ativação e inativação dos produtos naturais para o controle de pragas. Avaliou-se efeito por contato em adultos de S. zeamais. Para as irradiações foi utilizado um irradiador experimental de Cobalto-60, modelo Gammacell 220. Os extratos vegetais foram submetidos às doses de 2,5, 5,0, 7,5 e 10,0 kGy, em temperatura ambiente. Os melhores resultados foram obtidos com o extrato aquoso a 10,0 kGy e o extrato etanólico a 5,0 kGy de H. rosa-sinensis, que apresentaram 30,0 e 32,0% de eficiência, respectivamente. Os extratos aquoso e hexânico de C. arabica submetidos à dose de 5,0 kGy apresentaram 42,0% de eficiência, diferindo estatisticamente dos demais. Os extratos de O. basilicum apresentaram eficiência entre 30,0 e 44,0%. Com base nos resultados obtidos, a radiação gama interferiu no comportamento dos produtos naturais para o controle de pragas promovendo aumento, redução, ativação e inativação.

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Guedes, Jerson Vanderlei Carús, Gláucia Bortoluzzi, Auri Brackmann, and Ervandil Corrêa Costa. "Controle de Sitophilus zeamais Mots. através de diferentes concentrações de CO2 e O2." Ciência Rural 26, no. 2 (1996): 177–80. http://dx.doi.org/10.1590/s0103-84781996000200001.

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Instalou-se um experimento com objetivo de avaliar o efeito de diferentes concentrações dos gases: CO2 e O2 balanceado com N, no controle de Sitophilus zeamais. Utilizou-se parcelas subdivididas no tempo com parcela principal distribuída segundo o delineamento inteiramente casualizado com quatro repetições. A unidade experimental constou de um vidro com volume de cinco litros, onde estavam acondicionados 0,15 kg de milho desinfestado e 200 insetos adultos não sexados. Foram avaliadas oito concentrações de gases (tratamentos): 0,03% de CO2 e 21% de O2 (testemunha), 10% de CO2 e 16% de O2, 15% CO2 e 16% O2, 20% CO2 e 16% O2, 0% CO2 e 5% O2, 0% CO2 e 1% O2, 75% CO2 e 5% O2, e 12% CO2 e 8% O2. Os resultados demonstraram que 20% de CO2 controla totalmente os insetos em cinco dias. Tratamento com 15% de CO2 associado com 5% de O2, controla a totalidade dos insetos após dez dias. Concentração de 1% O2, sem adição de CO2, também controla 100% da população de Sitophilus zeamais. após 15 dias.

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Prado Ribeiro, Leandro, and José Djair Vendramim. "EFFECTS OF ORGANIC PLANT EXTRACTS ON BEHAVIOR OF Sitophilus zeamais MOTS. (COLEOPTERA: CURCULIONIDAE) ADULTS." BRAZILIAN JOURNAL OF AGRICULTURE - Revista de Agricultura 92, no. 2 (2017): 186. http://dx.doi.org/10.37856/bja.v92i2.3223.

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The aim of the present study was to evaluate the action of organic plant extracts from different parts of some species on host selection behavior of Sitophilus zeamais (Coleoptera: Curculionidade) adults. With the exception of extracts prepared from Aristolochia paulistana, all other tested plant extracts showed effect on behavior of S. zeamais adults, depending on concentration and solvent used in their preparation. The most pronounced repellent and/or deterrent effects were obtained with nonpolar extracts (in hexane and dichloromethane) of Annona montana, Annona mucosa, and Casearia sylvestris. On the other hand, ethanolic extracts from branches of C. sylvestris, leaves of A. montana, and leaves and seeds of A. mucosa were attractive and/or stimulant of feeding and/or oviposition of S. zeamais adults, depending on the concentration used. Thus, these extracts are promising sources of attractive compounds to be used in food baits in monitoring traps or even as repellents of stored grain pests.

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Boamah, ED, EA Osekre, JVK Afun, and RA Amoah. "Susceptibility of pro-Vitamin A biofortified maize genotypes to Sitophilus zeamais (Mots) in Ghana." African Journal of Food, Agriculture, Nutrition and Development 23, no. 121 (2023): 23617–36. http://dx.doi.org/10.18697/ajfand.121.22685.

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Pro-Vitamin A Biofortified maize is one of the crops with the cheapest and most sustainable option for preventing Vitamin A deficiency in humans in Ghana. It is also a key energy component of feed for layer chicken, forming about 60-70% of the total feed. Sitophilus zeamais is one of the most serious primary internal feeding pests of maize and other grains in sub-Saharan Africa. It causes both quantitative and qualitative grain losses. Two no - choice laboratory experiments in 112 days cumulative feeding of S. zeamais and 60 days susceptibility of six pro-Vitamin A Biofortified Maize (PVABM) genotypes to the insect were conducted. The experimental designs were Completely Randomized Design in four replications. Percentage grain damage and weight loss were significantly lower (P<0.05) in Aburokokoo than the other genotypes. Significantly more S. zeamais emerged from Accession GH2354 which also had significant (P<0.05) higher percentage grain damage than other genotypes. In the 60-day susceptibility experiment, grain hardness had significant (P<0.05) negative correlation with F1 progeny, index of susceptibility and protein content but positive significant correlation with median development period. Large number of S. zeamais F1 progeny, high susceptibility index, high protein, low total carbohydrate content, short median development time with low grain hardness value were observed on accession GH2354. Aburokokoo had significantly (P<0.05) small number of F1 progeny, low index of susceptibility, low protein and high total carbohydrate, long development period and intermediate value of grain hardness. The ascending order of grain hardness among the maize genotypes was GH2354<Obatanpa <Aburokokoo<Abontem<Honampa<Ahoodzin. There was no relationship between grain length, width and thickness and grain susceptibility. A cluster dendrogram obtained from the maize genotypes with regard to resistance parameters to S. zeamais showed that accession GH2354 and Obatanpa-QPM were susceptible, Ahoodzin, Honampa and Abontem were moderately resistant, with Aburokokoo resistant to the maize weevil infestation. Key words: Biofortified maize, stored produce, insect pest, Vitamin A deficiency, grain damage

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Barrion, A. A., R. C. Saxena, and G. Jilani. "Spermatogenetic cells and chromosomes of Sitophilus oryzae (L.) and Sitophilus zeamais (Mots.) (Coleoptera: Curculionidae)." CYTOLOGIA 53, no. 4 (1988): 659–64. http://dx.doi.org/10.1508/cytologia.53.659.

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Lima-Mendonça, A., S. M. F. Broglio, A. M. N. de Araújo, D. O. P. Lopes, and N. S. Dias-Pini. "Efeito de pós vegetais sobre Sitophilus zeamais (Mots., 1855) (Coleoptera: Curculionidae)." Arquivos do Instituto Biológico 80, no. 1 (2013): 91–97. http://dx.doi.org/10.1590/s1808-16572013000100013.

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Objetivou-se testar a atividade inseticida de pós vegetais em Sitophilus zeamais. Foram testados os pós de Anadenanthera colubrina (folhas); Annona muricata (sementes); Azadirachta inidica (folhas e flores); Caesalpinia pyramidalis (folhas), Chenopodium ambrosioides (folhas e flores); Cymbopogon sp. (folhas); Cymbopogon citratus (folhas); Momordica charantia (folhas e frutos); Piper nigrum (sementes); e Ricinus communis (folhas). Além disso, avaliou-se o potencial inseticida de folhas e flores de C. ambrosioides em diferentes dosagens. Na avaliação de repelência foi estabelecido um índice de preferência, e utilizado o teste t para comparação das médias das espécies vegetais. Também foi realizada a comparação das médias das plantas que foram classificadas como repelentes. Para avaliação da mortalidade, procedeu-se a análise de variância e a comparação das médias pelo teste de Tukey e também o teste t para comparação das médias dos tratamentos C. ambrosioides e P. nigrum. Os dados de emergência foram analisados pelo teste de Tukey. Para avaliar os dados de mortalidade, ocasionados por C. ambrosioides, determinou-se a CL50 utilizando a análise de Probit. Os dados de emergência foram verificados pela análise de regressão. As plantas que provocaram repelência foram Cymbopogon sp., C. citratus e C. ambrosioides. A planta que mais afetou a sobrevivência da praga foi C. ambrosioides, que provocou mortalidade total dos insetos infestantes e nenhuma emergência. Adultos de S. zeamais são mais suscetíveis a concentração de 0,125 g do pó de C. ambrosioides.

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Jembere, B., D. Obeng-Ofori, A. Hassanali, and G. N. N. Nyamasyo. "Products derived from the leaves of Ocimum kilimandscharicum (Labiatae) as post-harvest grain protectants against the infestation of three major stored product insect pests." Bulletin of Entomological Research 85, no. 3 (1995): 361–67. http://dx.doi.org/10.1017/s0007485300036099.

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AbstractThe bioactivity of materials from the leaves of Ocimum kilimandscharicum was tested against Sitophilus zeamais Mots chulsky (Coleoptera: Curculionidae), Rhyzopertha dominica (Fabricius) (Coleoptera: Bostrichidae) and Sitotroga cerealella (Olivier) (Lepidoptera: Gelechiidae) in maize and sorghum grains in the laboratory. Exposure of adults of the three insect species to dried ground leaves and essential oil extract of O. kilimandscharicum induced 100% mortality after 48 h. Fresh and dried whole leaves were not toxic to Sitophilus zeamais or R. dominica. Grains treated with dried ground leaves and essential oil extract caused significant reductions in the number of progeny and survival rate of all three pest species tested. There was no adult survival or progeny production in grains treated separately with each of the two materials at doses of 25.0 g (dried ground leaves) and 0.3 g (essential oil) per 250 g of grain, respectively. Unlike R. dominica and Sitotroga cerealella, grains treated with fresh leaves enhanced the feeding activity of Sitophilus zeamais. Ground leaves and the essential oil, however, protected the grains against feeding by all three species, resulting in lower weight loss and number of damaged seeds compared with untreated grains. All the plant materials were repellent to S. zeamais with the essential oil extract applied at 0.3 g/250 g of grain evoking the highest repellent action. There was, however, considerable variation in the repellency of the materials against R. dominica and Sitotroga cerealella. The results are discussed in terms of the efficacy of O. kilimandscharicum for protection against loss due to insects in traditional grain storage in developing countries.

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Ferreira da Silva Junior, Miguel, Samuel Santana Farias, Sabrina Barros do Nascimento Rocha, et al. "PREFERÊNCIA ALIMENTAR DE Sitophilus zeamais MOTS., 1855 (COLEOPTERA: CURCULIONIDAE) SUBMETIDA A DIFERENTES VARIEDADES DE Zea mays L. (POACEAE)." Revista Ciência Agrícola 22, Número especial (2024): 1–5. https://doi.org/10.28998/rca.22.18590.

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A produção de milho no Brasil é essencial para a economia, sendo um dos maiores produtores e exportadores do grão. As sementes crioulas se destacam devido ao alto teor na adaptação local, tendo a premissa de possuírem resistência a doenças e pragas. Uma das principais entraves fitossanitárias são os insetos de grãos armazenados, merecendo destaque o inseto Sitophilus zeamais, que causa perdas de até 30% na produção. O uso de sementes crioulas é de grande importância, pois pressupõe a resistência do tipo antixenose. Assim, este estudo avaliou a resistência de variedades de milho crioulo e um comercial à infestação de S. zeamais, por meio da preferência alimentar. Foram testadas três variedades crioulas (Jabotão, Batité e Palha roxa) e uma comercial (BRS Caatingueiro). O teste foi realizado em arenas com três potes conectados, utilizou-se 10 adultos de S. zeamais em jejum e 20g de milho. Os insetos foram contabilizados após 24 e 48 horas. O delineamento experimental foi inteiramente casualizado, com oito repetições, e os dados foram analisados pelo teste χ², utilizando o software SAS. Não foram observadas diferenças significativas em nenhum tratamento.

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Enobakhare, D. A., and E. I. Obasuyi. "The Susceptibility of some maize varieties to Sitophilus Zeamais mots (Coleoptera: Curculionidae)." International Journal of Tropical Insect Science 14, no. 02 (1993): 179–83. http://dx.doi.org/10.1017/s1742758400014582.

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Barros do Nascimento Rocha, Sabrina, Miguel Ferreira da silva junior, Lavinia Vitória dos Santos, et al. "PREFERÊNCIA ALIMENTAR DE Sitophilus zeamais MOTS., 1855 (COLEOPTERA: CURCULIONIDAE) SUBMETIDA A DIFERENTES VARIEDADES DE Zea mays L. (POACEAE)." Revista Ciência Agrícola 22, Número especial (2024): 1–6. https://doi.org/10.28998/rca.22.18438.

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Portadoras de uma larga diversidade genética, as sementes crioulas são mais adaptadas as condições adversas, dispõem baixa dependência a insumos externos, contribuem para a manutenção da produtividade agrícola obtendo assim melhor retorno da produção, mesmo em contextos desafiadores. No entanto, embora resistentes, são frequentemente atacadas pela praga principal do milho armazenado, Sitophilus zeamais Mots., 1855 (Coleoptera: Curculionidae), na qual podem resultar na deterioração da qualidade do grão, ocasionando em milhões de perdas econômicas. Assim, o objetivo deste trabalho foi avaliar a resistência entre 5 diferentes variedades de milho crioulo à S. Zeamais, utilizando a determinação da preferência alimentar (Antixenose). Os bioensaios foram conduzidos no Laboratório de Entomologia Agrícola e Florestal (LEAF), localizado no Campus de Engenharias e Ciências Agrárias, Rio Largo-AL, onde os grãos foram submetidos a diferentes condições físicas. Os pareamentos utilizados foram: (I) Grãos inteiros de Caatingueiro x Asteca; (II) Grãos inteiros de Palha roxa x Asteca; (III) Grãos inteiros Jabotão x Asteca; (IV) Grãos inteiros de Batité x Asteca. Os dados foram analisados através do teste não-paramétrico χ2 e comparados pela probabilidade de erro a 5%. Pelos resultados observados, houve diferença significativa apenas na combinação de Asteca x Caantingueiro em 24h, demonstrando preferência de S. zeamais pelos grãos Asteca, esses resultados podem contribuir para estratégias de manejo e nas táticas de controle de pragas.

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Tavares, M. A. G. C., and J. D. Vendramim. "ATIVIDADE INSETICIDA DA ERVA-DE-SANTA-MARIA CHENOPODIUM AMBROSIOIDES L. (CHENOPODIACEAE) EM RELAÇÃO A SITOPHILUS ZEAMAIS MOTS., 1855 (COL.: CURCULIONIDAE)." Arquivos do Instituto Biológico 72, no. 1 (2005): 51–55. http://dx.doi.org/10.1590/1808-1657v72p0512005.

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RESUMO O gorgulho-do-milho, Sitophilus zeamais é considerado uma das principais pragas de grãos armazenados. Visando à busca de um método alternativo de controle dessa praga, avaliou-se, em laboratório, o potencial inseticida dos pós de frutos e da planta inteira (com frutos) de Chenopodium ambrosioides. Os insetos utilizados nos ensaios foram obtidos de criação mantida em grãos de trigo. Avaliou-se o efeito inseticida dos pós sobre a fase imatura e adultos do inseto, utilizando-se caixas plásticas contendo 20 g de trigo em seu interior, e liberados 20 adultos de S. zeamais para que realizassem a oviposição. Após 3 dias, os insetos foram retirados, e aos 15 e 21 dias após a infestação foram adicionados 0,25 g dos pós de C. ambrosioides. As avaliações foram realizadas no período de 25 a 60 dias a contar da infestação inicial. Para avaliação do poder residual, foram utilizadas caixas plásticas contendo 20 g de trigo em seu interior, e colocados 0,25 g dos pós de C. ambrosioides, separados e em contato com os grãos. Posteriormente, foram liberados 20 adultos de S. zeamais, em diferentes períodos: no momento da instalação do ensaio (0 dia), e após 5, 10 e 20 dias. As avaliações foram realizadas 5 dias após a infestação, contandose o número de insetos mortos. Concluiu-se que pós de frutos e da planta inteira (com frutos), aplicados após 15 dias da infestação inicial, possuem efeito inseticida sobre a fase imatura de S. zeamais e que pós de frutos apresentam efeito inseticida residual contra adultos do inseto pelo período máximo de 5 dias.

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Boiça Jr., Arlindo L., Fernando M. Lara, and Flávio P. Guidi. "Resistência de genótipos de milho ao ataque de Sitophilus zeamais Mots. (Coleoptera: Curculionidae)." Anais da Sociedade Entomológica do Brasil 26, no. 3 (1997): 481–85. http://dx.doi.org/10.1590/s0301-80591997000300010.

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Avaliação da resistência de genótipos de milho ao ataque de Sitophilus zeamais Mots., em condições de laboratório, em testes com e sem chance de escolha, indicaram que os genótipos menos atrativos ao inseto foram C-701 e C-505 (8,5% e 10,43% dos insetos liberados), enquanto que C-525 e C-606 (33,25% e 21,72%) foram os mais atrativos. Os genótipos C-511, C-505, C-525 e C-125 proporcionaram a emergência de menor número de insetos e de peso de grãos consumidos (5,0 insetos e 0,1g; 8,1 e 0,1; 8,5 e 0,2; 9,9 e 0,2), quando comparados ao C-606, C-805, C-701 e C-135 com maiores valores (24,2 insetos e 0,6g; 18,6 e 0,5; 20,4 e 0,5; 20,1 e 0,5 respectivamente).

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Udo, Ime Okon. "Laboratory Evaluation of Toxic and Repellent Properties of Dracaena arborea Against Sitophilus zeamais and Callosobruchus maculatus." Biological Sciences - PJSIR 54, no. 3 (2011): 152–56. http://dx.doi.org/10.52763/pjsir.biol.sci.54.3.2011.152.156.

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Laboratory evaluation of ethanolic extract of Dracaena arborea leaves partitioned between equal volumes of chloroform, ethyl acetate, n-hexane and n-butanol to obtain various fractions was carried out to assess contact toxicity on filter paper and by topical application, toxicity of extracts applied on grains and repellent action against Sitophilus zeamais (Mots.) and Callosobruchus maculatus Fabricius on stored grains. Insects were exposed to both treated and untreated surfaces and mortality was scored at different times after treatment. Results obtained from the study showed the extract fractions causing significant mortality of both insects exposed to treatments. A contact toxicity of over 80% was recorded against zeamais from ethyl acetate fraction. Similarly, 100% mortality was recorded against C. maculatus from ethyl acetate fraction after 96 h of treatment. Results obtained from grain treatment produced a significant mortality of over 60% against C. maculatus from n-hexane fraction while the aqueous fraction significantly killed S. zeamais by over 15% compared with the control treatment. A strong repellent action was evoked against S. zeamais while moderate action was recorded against C. maculatus. An overall repellency of 40% and 24% was recorded from various extract fractions against S. zeamais and C. maculatus, respectively. The results obtained suggest a promising alternative to synthetic insecticides and the incorporation of arborea into storage pest management system is advised.

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Conceição, Edileuza dos Reis Souza, Andréia Márcia Santos de Souza David, Cleisson Dener da Silva, Clarice Diniz Alvarenga, Debora Cristina Santos Custodio, and Joyce Costa Ribeiro. "Atividade inseticida de extratos vegetais e terra de diatomácea sobre Sitophilus zeamais em sementes de milho." Revista Thema 23, no. 2 (2024): 509–20. http://dx.doi.org/10.15536/thema.v23.2024.509-520.3486.

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A qualidade dos grãos e sementes de milho armazenados pode ser afetada pela ação de insetos pragas, como Sitophilus zeamais (Mots. 1855, Coleoptera: Curculionidae), um dos maiores causadores de perdas quantitativas e qualitativas. Objetivou-se avaliar o efeito de extratos vegetais e terra de diatomácea no controle de S. zeamais em sementes de milho armazenadas. O delineamento experimental foi inteiramente casualizado, composto de cinco tratamentos e cinco repetições. Para compor os tratamentos, foram utilizadas sementes de milho infestadas e tratadas com terra de diatomácea e extratos vegetais em pó de crambe e nim e, como controle, sementes infestadas e não infestadas, sem tratamento. As sementes foram armazenadas por 30 dias em recipientes plásticos de 500 mL, contendo 100 gramas de milho e tratadas com 5,26 gramas (5%) dos pós vegetais e terra de diatomácea, homogeneizados por 3 minutos. Foram avaliados a mortalidade dos insetos, o índice de infestação e a repelência. Os resultados mostraram que a terra de diatomácea resultou na completa mortalidade de S. zeamais após 30 dias de armazenamento. O extrato de crambe demonstrou eficácia na repelência durante 24 horas. A terra de diatomácea também reduziu significativamente a sobrevivência de S. zeamais ao longo do período de armazenamento, evitando a infestação nas sementes tratadas. Tanto o extrato de crambe quanto a terra de diatomácea apresentaram propriedades repelentes contra S. zeamais após 24 horas de exposição.

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Afonso, Ana Paula Schneid, João Luiz Faria, Marcos Botton, and Alci Enimar Loeck. "Controle de Sitophilus zeamais Mots., 1855 (Coleoptera: Curculionidae) com inseticidas empregados em frutíferas temperadas." Ciência Rural 35, no. 2 (2005): 253–58. http://dx.doi.org/10.1590/s0103-84782005000200001.

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O gorgulho do milho Sitophilus zeamais Mots. tem sido relatado com freqüência atacando frutíferas temperadas em condições de campo, com destaque para o pessegueiro em Pelotas, RS, macieira em Fraiburgo, SC e videira na Serra Gaúcha, RS. Este trabalho avaliou, em laboratório, o efeito dos inseticidas deltametrina (Decis 25 CE, 40mL 100L-1), dimetoato (Dimetoato 400 CE, 150mL 100L-1), triclorfon (Dipterex 500 SNAqC, 300mL 100L-1), fosmet (Imidan 500 PM, 200g 100L-1), fention (Lebaycid 500 CE, 100mL 100L-1), clorpirifós (Lorsban 480 BR, 150mL 100L-1), malation (Malation 1000, 200mL 100L-1), carbaril (Sevin 480 SC, 360mL 100L-1), fenitrotion (Sumithion 500 CE, 150mL 100L-1) e metidation (Supracid 400 CE, 100mL 100L-1) atualmente empregados no controle de pragas em frutíferas temperadas e os novos inseticidas tiametoxam (Actara 250 WG, 15 e 30g 100L-1), benzoato de emamectina (Proclaim 5 SG, 10 e 20g 100L-1), imidacloprid (Provado 200 SC, 30 e 60mL 100L-1), spinosad (Tracer 480 CE, 10 e 20mL 100L-1) e etofenprox (Trebon 100 SC, 100 e 150mL 100L-1). No primeiro experimento, frutos de maçã foram mergulhados na calda inseticida por 10 segundos e oferecidos a adultos de S. zeamais sp (contato residual) e, no segundo, os produtos foram aplicados diretamente sobre os insetos (contato direto) em torre de pulverização. Os inseticidas triclorfon (150g 100L-1), fention (50g 100L-1), clorpirifós (72g 100L-1), malation (200g 100L-1), metidation (40g 100L-1) e tiametoxam (3,75 e 7,5g 100L-1) foram eficientes no controle do gorgulho do milho, via contato residual, enquanto fention (50g 100L-1), clorpirifós (72g 100L-1), malation (200g 100L-1), fenitrotion (75g 100L-1) e metidation (40g 100L-1) foram eficientes via contato direto.

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Adenekan, M. O., R. O. Onasanya, and E. O. Owolade. "Assessment of the toxicity of Carica papaya plant powders against Sitophilus zeamais (Mots) (Coleoptera: Curculionidae) on maize seeds during storage." Journal of Bioscience and Biotechnology Discovery 4, no. 5 (2019): 108–13. http://dx.doi.org/10.31248/jbbd2019.109.

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The toxicity of Carica papaya plant parts powder (leaf, stem bark, root and flower) at different dosages (0.5, 1.0, 1.5, 2.0 and 2.5 g) against Sitophilus zeamais infesting stored maize grains were assessed at the Biology Laboratory of the Federal College of Agriculture, Ibadan. Treatments were admixed with 30 g of maize grains, infested with 10 teneral adults of S. zeamais and stored in 3.0 mm petri dishes. The experiment was laid out in completely randomized design (CRD) and replicated four times each. Data were collected on adult mortality, oviposition and percentage weight loss of the grain in each of the replicate. Data collected were analyzed using analysis of variance, while sample means were separated with the aid of least significant difference (LSD) at 5%. There were significant differences in adult mortality of S. zeamais treated with different dosages of the plant parts powder. The flower powder of the plant recorded the highest mean adult mortality (10) compared to the lowest adult mortality of 0.1 obtained at the control experiment. The flower part powder also revealed the lowest mean eggs laid (oviposition) (7.1) and the lowest grain damage loss (1.4%) when compared with the values of 18.7 and 40.0 obtained for mean eggs laid and percentage weight loss obtained with stem bark and control treatments respectively. This clearly showed that the powder of the flower of C. papaya showed good potential as bio-insecticide for protecting stored maize grains.

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Coombs, C. W., and J. E. Porter. "Some factors affecting the infestation of wheat and maize by Sitophilus oryzae (L.) and Sitophilus zeamais Mots. (Coleoptera: Curculionidae)." Journal of Stored Products Research 22, no. 1 (1986): 33–41. http://dx.doi.org/10.1016/0022-474x(86)90045-7.

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Rondelli, Vando Miossi, José Romário de Carvalho, Dirceu Pratissoli, et al. "Selection of Beauveria bassiana (Bals.) Vuill. isolates for controlling Sitophilus zeamais (Mots.) (Coleoptera: Curculionidae)." Idesia (Arica) 30, no. 3 (2012): 97–102. http://dx.doi.org/10.4067/s0718-34292012000300013.

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Fatematuzzjohora, Abdul Ahad Md., Rubiya Khatun Most., and A. Hossain M. "Evaluation of toxicity of five medicinal plant extracts on maize weevil, Sitophilus zeamais (Mots.) (Coleoptera: Curculionidae) on stored maize." International Journal of Agricultural Sciences and Technology 1, no. 2 (2021): 40–50. https://doi.org/10.51483/IJAGST.1.2.2021.40-50.

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The experiments were conducted in the laboratory of the Department of Entomology and Department of Agricultural Chemistry, Hajee Mohammad Danesh Science and Technology University (HSTU), Dinajpur during May-December 2017 to evaluate the toxicity of five medicinal plant extracts (water hyacinth Eichhornia crassipes, swamp smartweed Polygonum coccineum, ariach Cassia tora, wild capsicum Croton bonplandianum and hill glory bower Clerodendrum viscosum) against maize weevil, Sitophilus zeamais (Mots.) on stored maize. Data were statistically significant of each treatment (p < 0.05). Among the five weed extract; the wild capsicum extract provided the highest average mortality (93.33 ± 3.33), following the hill glory bower (86.67 ± 3.33) and swamp smartweed (86.67 ± 3.33) at 3% concentration. But it was zero in control. The average numbers of lowest numbers of adult emergence among the five weed extract was found in wild capsicum (3.00 ± 0.39) following Swamp smartweed (5.11 ± 0.95) at 3% concentration; whereas, in control it was (54.00 ±1.15). The lowest percent of seed damage was found in wild capsicum (3.00 ± 0.38%) following Swamp smartweed (4.22 ± 0.58). But in control it was 44.00 ± 1.15.The repellency class of different plant extracts at different concentration level varied between I to IV. But the hill glory bower at 3.0% showed statistically best as it showed the highest repellency rate was 66.0 ± 5.31% and group was IV. However, the toxicity order was wild capsicum > swamp smartweed > hill glory bower > water hyacinth >, ariach.

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Procópio, Sérgio de Oliveira, José Djair Vendramim, José Ivo Ribeiro Júnior, and José Barbosa dos Santos. "Bioatividade de diversos pós de origem vegetal em relação A Sitophilus zeamais Mots. (Coleoptera: Curculionidae)." Ciência e Agrotecnologia 27, no. 6 (2003): 1231–36. http://dx.doi.org/10.1590/s1413-70542003000600004.

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Foram avaliadas, em condições de laboratório, a repelência, sobrevivência e emergência de adultos de Sitophilus zeamais em grãos de milho tratados com pós de Azadirachta indica A. Juss (frutos), Capsicum frutescens L. (frutos e folhas, separadamente), Chenopodium ambrosioides L. (folhas, flores e frutos, conjuntamente), Eucalyptus citriodora Hook (folhas), Melia azedarach Blanco (folhas) e Ricinus communis L. (folhas). As plantas que provocaram repelência foram E. citriodora e C. frutescens (folhas), com efeito mais pronunciado na primeira espécie. A única planta que afetou a sobrevivência da praga foi C. ambrosioides, que provocou mortalidade total dos insetos infestantes e nenhuma emergência de adultos. Para essa planta, foi também determinado o limiar de atividade inseticida, constatando-se que a dosagem mínima necessária para controle total da população dos insetos foi de 0,1645 g/ 20 g de milho.

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Tavares, Márcio A. G. C., and José D. Vendramim. "Bioatividade da erva-de-santa-maria, Chenopodium ambrosioides L., sobre Sitophilus zeamais Mots. (Coleoptera: Curculionidae)." Neotropical Entomology 34, no. 2 (2005): 319–23. http://dx.doi.org/10.1590/s1519-566x2005000200021.

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Coitinho, Rodrigo Leandro Braga de Castro, José Vargas de Oliveira, Manoel Guedes Corrêa Gondim Júnior, and Claúdio Augusto Gomes da Câmara. "Persistência de óleos essenciais em milho armazenado, submetido à infestação de gorgulho do milho." Ciência Rural 40, no. 7 (2010): 1492–96. http://dx.doi.org/10.1590/s0103-84782010005000109.

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Os óleos essenciais e os compostos constituintes têm sido pesquisados quanto a sua atividade inseticida contra pragas de grãos armazenados. Neste trabalho, avaliou-se a persistência de óleos essenciais em milho armazenado, submetido à infestação do gorgulho do milho, Sitophilus zeamais Mots. (Coleoptera: Curculionidae). A persistência dos óleos e do eugenol foi avaliada no período inicial (logo após a impregnação) e aos 30, 60, 90 e 120 dias de armazenamento. As mortalidades de S. zeamais, no período inicial, variaram entre 93,8 (Piper hispidinervum, Melaleuca leucadendron e eugenol) e 100% (Eugenia uniflora, frutos verdes de Schinus terebinthifolius e Piper marginatum). A partir dos 30 dias, as mortalidades, de modo geral, decresceram, com exceção de P. marginatum (92,2%), que alcançou 53,1% de mortalidade aos 120 dias de armazenamento. De acordo com as equações de regressão ajustadas para o número de S. zeamais emergidos em todo o período de armazenamento, apenas não houve significância para os óleos de S. terebinthifolius, P. marginatum e testemunha. Em relação à média geral, o óleo de P. marginatum foi o mais persistente, proporcionando emergência de apenas 0,30 insetos, diferindo dos óleos restantes, do eugenol e da testemunha. Os demais tratamentos só diferiram em relação à testemunha.

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CANEPPELE, Maria Aparecida Braga, Patrícia De Jesus ANDRADE, and Alexandre Garcia SANTAELLA. "DIFERENTES DOSAGENS DE PÓ INERTE E TEMPERATURAS EM MILHO ARMAZENADO PARA CONTROLE DE GORGULHO-DO-MILHO." Scientia Agraria 11, no. 4 (2010): 343. http://dx.doi.org/10.5380/rsa.v11i4.18270.

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No Brasil, Sitophilus zeamais Mots. e S. oryzae L. (Coleoptera: Curculionidae) estão entre os insetos - praga de maior importância para os grãos de milho e arroz armazenados, respectivamente, provocando perdas quantitativas e qualitativas. A terra de diatomácea tem sido estudada por diversos pesquisadores visando à proteção de grãos armazenados. Esta pesquisa objetivou avaliar a eficácia do pó inerte em diferentes dosagens e temperaturas para o controle de S. zeamais em grãos de milho armazenados. Amostras de 400 g de milho foram acondicionadas em frascos de vidro com tampas teladas e submetidas aos seguintes tratamentos: pó inerte nas dosagens de 0, 125, 500 e 750 g t-1nas temperaturas de 25, 30 e 35 °C, em cinco repetições. Cada frasco recebeu 30 insetos adultos de S. zeamais para as avaliações da mortalidade com três, sete, 14, 21 e 28 dias. Não houve diferença estatística para as dosagens de 500 e 750 g.t-1, nas três temperaturas estudadas. Nas temperaturas de 25 e 30 °C as dosagens de 500 e 750 g t-1se tornaram eficientes a partir do sétimo dia de avaliação. Na temperatura de 35 °C as três dosagens, no terceiro dia de avaliação, provocaram quase 100% de mortalidade. A terra diatomácea é eficaz para o controle de S. zeamais, sendo a dose de 500 g t-1 indicada para o controle dessa praga em temperaturas acima de 25 °C.

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Ribeiro, Leandro do Prado, José Djair Vendramim, Keylla Utherdyany Bicalho, et al. "Annona mucosa Jacq. (Annonaceae): A promising source of bioactive compounds against Sitophilus zeamais Mots. (Coleoptera: Curculionidae)." Journal of Stored Products Research 55 (October 2013): 6–14. http://dx.doi.org/10.1016/j.jspr.2013.06.001.

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Sharma, Sheela Devi, Resham Bahadur Thapa, Gopal Bahadur KC, Ghanashyam Bhandari, and Sundar Tiwari. "Studies on food preferences of maize weevil, Sitophilus zeamais Mots. to different crops in Chitwan, Nepal." Journal of Maize Research and Development 2, no. 1 (2016): 58–65. http://dx.doi.org/10.3126/jmrd.v2i1.16215.

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Food preference by the maize weevil, Sitophilus zeamais Motschulsky was studied on seven different crops and varieties including maize, wheat and rice. They were maize cultivars namely Arun-2, Manakamana-4, Deuti, buckwheat local cultivar, wheat cultivar namely Annapurna-1, polished rice-Radha 4 and unshelled rice cultivar Mansuli under storage condition at Institute of Agriculture and Animal Science, Rampur, Chitwan, Nepal from June 2013 to February 2014 . The hosts were tested using completely randomized design with three replications and were laid in free-choice and no-choice conditions. The maximum number of grain loss was recorded in wheat followed by polished rice respectively. Similarly, the highest weight loss was recorded in polished rice followed by Wheat in both conditions. F1 progeny emergence of weevil was highest in wheat followed by polished rice in free-choice and in no choice conditions, the highest progeny were emerged from polished rice followed by wheat. The lowest numbers of weevils emerged from rice in both conditions. Maximum germination losses were recorded in wheat (24.33%) and lowest in Arun-2 (9.67). The rice showed a relatively higher preference to maize weevil under storage condition.

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Wale, Melaku, and Habtamu Assegie. "Efficacy of castor bean oil (Ricinus communis L.) against maize weevils (Sitophilus zeamais Mots.) in northwestern Ethiopia." Journal of Stored Products Research 63 (July 2015): 38–41. http://dx.doi.org/10.1016/j.jspr.2015.05.006.

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Botton, Marcos, Irineu Lorini, and Ana P. S. Afonso. "Ocorrência de Sitophilus zeamais Mots. (Coleoptera: Curculionidae) danificando a cultura da videira no Rio Grande do Sul." Neotropical Entomology 34, no. 2 (2005): 355–56. http://dx.doi.org/10.1590/s1519-566x2005000200027.

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Toscano, Luciana C., Arlindo L. Boiça Jr., Fernando M. Lara, and José M. Waquil. "Resistência e mecanismos envolvidos em genótipos de milho em relação ao ataque do gorgulho, Sitophilus zeamais Mots. (Coleoptera: Curculionidae)." Anais da Sociedade Entomológica do Brasil 28, no. 1 (1999): 141–46. http://dx.doi.org/10.1590/s0301-80591999000100015.

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A resistência de 30 genótipos de milho ao ataque de Sitophilus zeamais Mots. foi avaliada em teste sem chance de escolha, sendo efetuada uma seleção de 10 deles (M 9560, XHT 12, A 952, AG 5011, X 9557, Z 8452, C 615, C 435, DINA 888, C 606), os quais foram submetidos ao teste com chance de escolha, avaliando-se a atratividade e a preferência para oviposição. Pelos resultados concluiu-se que os genótipos menos atrativos foram Z 8452 (3,1%) e M 9560 (3,2%), enquanto o mais atrativo foi C 615 (24,7%). Os genótipos que apresentaram resistência do tipo não-preferência para oviposição foram A 952, M 9560 e XHT 12 com números médios de 2,0; 3,0 e 3,4 ovos por recipiente. A resistência do tipo não-preferência para alimentação e/ou antibiose foi observada nos genótipos M 9560, A 952 e Z 8452. Os genótipos com alta suscetibilidade ao gorgulho foram C 435, C 444, C 606 e AG 8010.

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Moreira, Márcio Dionizio, Marcelo Coutinho Picanço, Luiz Cláudio de Almeida Barbosa, et al. "Plant compounds insecticide activity against Coleoptera pests of stored products." Pesquisa Agropecuária Brasileira 42, no. 7 (2007): 909–15. http://dx.doi.org/10.1590/s0100-204x2007000700001.

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The objective of this work was to screen plants with insecticide activity, in order to isolate, identify and assess the bioactivity of insecticide compounds present in these plants, against Coleoptera pests of stored products: Oryzaephilus surinamensis L. (Silvanidae), Rhyzopertha dominica F. (Bostrichidae) and Sitophilus zeamais Mots. (Curculionidae). The plant species used were: basil (Ocimum selloi Benth.), rue (Ruta graveolens L.), lion's ear (Leonotis nepetifolia (L.) R.Br.), jimson weed (Datura stramonium L.), baleeira herb (Cordia verbenacea L.), mint (Mentha piperita L.), wild balsam apple (Mormodica charantia L.), and billy goat weed or mentrasto (Ageratum conyzoides L.). The insecticide activity of hexane and ethanol extracts from those plants on R. dominica was evaluated. Among them, only hexane extract of A. conyzoides showed insecticide activity; the hexane extract of this species was successively fractionated by silica gel column chromatography, for isolation and purification of the active compounds. Compounds 5,6,7,8,3',4',5'-heptamethoxyflavone; 5,6,7,8,3'-pentamethoxy-4',5'-methilenedioxyflavone and coumarin were identified. However, only coumarin showed insecticide activity against three insect pests (LD50 from 2.72 to 39.71 mg g-1 a.i.). The increasing order of insects susceptibility to coumarin was R. dominica, S. zeamais and O. surinamensis.

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Sousa, Adalberto Hipólito de, Patrício Borges Maracajá, Alexandre Almeida da Costa, Alberto Soto Giraldo, and Tadeu Fladiner Costa Pereira. "DESEMPEÑO DE Sitophilus zeamais (COLEOPTERA: CURCULIONIDAE) EN DIFERENTES VARIEDADES DE MAÍZ Y CONDICIONES ATMOSFÉRICAS." Revista Verde de Agroecologia e Desenvolvimento Sustentável 1, no. 1 (2006): 20–25. http://dx.doi.org/10.18378/rvads.v1i1.2.

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El objetivo de este trabajo fue investigar el potencial de desarrollo y de destrucción del gorgojo Sitophilus zeamais Mots. (Coleoptera: Curculionidae) en tres vari-edades de maíz (cruzeta, milhometro e hibra) almacenadas en tres condiciones atmosféricas (hermética, semihermética y no-hermética). Fueron evaluadas al final del período de almacenamiento, 60 días, a emergencia de adultos y a perdida de peso de los granos. La variedad milhometro se mostró más susceptible al desarrollo del gorgojo, pues presentó los mayores valores de emergencia de adultos y perdida de peso de los granos en las condiciones semi-hermética y no-hermética. Ya la variedad cruzeta, al ser almacenada en la condición hermética, presentó menor emergencia de adultos y perdida de peso de granos, tornando, por tanto, evidente la influencia de la condición hermética en la biología de esta especie, pues proporcionó menor incidencia de insectos y pérdida de peso del producto lo mismo en las variedades que se mostraron más susceptibles.

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Okiwelu, S. N., O. O. Adu, and V. N. Okonkwo. "The effect of Sitophilus zeamais (Mots) (Coleoptera: Curculionidae) on the quality and viability of stored maize in Nigeria." International Journal of Tropical Insect Science 8, no. 03 (1987): 379–84. http://dx.doi.org/10.1017/s1742758400005427.

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Johora, Fatematuzz, Md Abdul Ahad, Most Rubiya Khatun, and M. A. Hossain. "Evaluation of toxicity of five medicinal plant extracts on maize weevil, Sitophilus zeamais (Mots.) (Coleoptera: Curculionidae) on stored maize." International Journal of Agricultural Sciences and Technology 1, no. 2 (2021): 40. http://dx.doi.org/10.51483/ijagst.1.2.2021.40-50.

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Silva, Gonzalo, Odette Orrego, Ruperto Hepp, and Maritza Tapia. "Búsqueda de plantas con propiedades insecticidas para el control de Sitophilus zeamais en maíz almacenado." Pesquisa Agropecuária Brasileira 40, no. 1 (2005): 11–17. http://dx.doi.org/10.1590/s0100-204x2005000100002.

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Se evaluaron, bajo condiciones de laboratorio, 23 plantas en polvo para el control de Sitophilus zeamais Mots. en maíz almacenado. En una primera etapa se evaluaron todos los polvos a una concentración del 1,0% (p/p). Posteriormente aquellos polvos con mejores resultados fueron probados en concentraciones del 0,1, 0,5, 1,0 y 2,0% en granos de maíz infestados con los insectos a las 24 horas, 30, 60 y 90 días. Se evaluaron 63 tratamientos distribuidos en un diseño experimental completamente al azar y el ensayo se repitió tres veces. En la primera etapa, la mayor mortalidad de insectos se obtuvo con Chenopodium ambrosioides L. y Peumus boldus Mol. con 65,8% y 99,3%, respectivamente. Estos tratamientos también propiciaron la menor emergencia de adultos, mientras que la pérdida de peso de los granos no superó el 13,0%. En las evaluaciones a diferentes concentraciones mostraron una mayor mortalidad y menor emergencia a concentraciones del 1,0% y 2,0% (p/p), obteniéndose para C. ambrosioides una mortalidad del 90,3% y 90,1% y para P. boldus 97,1% y 98,8%, respectivamente. La residualidad se mantuvo sólo en el tratamiento de 24 horas.

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Ogunleye, R. F., and S. O. Adefemi. "Evaluation of the dust and methanol extracts of Garcinia kolae for the control of Callosobruchus maculatus (F.) and Sitophilus zeamais (Mots)." Journal of Zhejiang University SCIENCE B 8, no. 12 (2007): 912–16. http://dx.doi.org/10.1631/jzus.2007.b0912.

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Maranhão, Elizabeth A. A., and José V. Oliveira. "Efeito residual de inseticidas sobre Sitophilus zeamais Mots., 1855, em grãos de milho (Zea mays L.) e sorgo (Sorghum bicolor (L.) Moench)." Anais da Sociedade Entomológica do Brasil 16, no. 1 (1987): 61–71. http://dx.doi.org/10.37486/0301-8059.v16i1.461.

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Figueiredo, Rafael Cavalcante, Waldireny Caldas Rocha, and Adriana Dantas Gonzaga de Freitas. "Efeito Inseticida do Óleo Essencial e Extratos Etanólicos das Folhas de Mastruz (Chenopodium ambrosioides L.) Sobre o Gorgulho do Milho (Sitophilus zeamais Mots)." Ensaios e Ciência: C. Biológicas, Agrárias e da Saúde 22, no. 2 (2019): 80. http://dx.doi.org/10.17921/1415-6938.2018v22n2p80-84.

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Os gorgulhos atacam indistintamente grãos armazenados, causando anualmente enormes prejuízos. Medidas de controle, que causem menorimpacto ambiental, como alternativa para diminuir a aplicação de agrotóxicos e a utilização de inseticidas vegetais são importantes. O Mastruz (C. ambrosioides) é uma planta medicinal herbácea, originária da América Central e do Sul, suas folhas e frutos acumulam óleo essencial rico em ascaridol, princípio ativo responsável pelo efeito vermífugo da planta. O presente trabalho tem como objetivo investigar o potencial de ação inseticida do Mastruz sobre o gorgulho Sithophilus zeamais (Coleoptera: Curculionidae) em condições experimentais. Os experimentos foram realizados na Universidade Federal do Amazonas. O 1kg do material vegetal foi coletado na cidade de Coari, Amazonas, para a extração do óleo e para os extratos contendo etanol. Os insetos utilizados no experimento foram criados no laboratório de Zoologia. Foi realizada a cromatografia, em camada delgada, no laboratório QBioma. Foram pesadas as amostras extraídas da planta, total de 0,010g, e diluídas em 10mL de água destilada, preparada em cubas e as placas cromatográficas de 5cm x 10cm, contendo na cuba uma proporção de fase móvel de 1:1 de 1:1 de Hexano e Acetato de etila totalizando 10mL de solução, obteve-se uma separação das bandas. Nas concentrações de óleo, a eficiência no efeito inseticida foi observada a partir de 15μL, e os extratos etanólicos apenas nas concentrações de 1:1\2 e 1:1, ostrando a eficiência da planta como inseticida para o inseto-praga. Palavras-chave: Gorgulho do Milho. Extratos de Plantas. Toxicidade de Plantas. Bioensaios, Cromatografia.AbstractThe weevils indiscriminately attack stored grains, causing enormous losses annually. Control measures that cause less environmental impactas an alternative to reduce the application of agrochemicals and the use of plant insecticides are important. Mastruz (C. ambrosioides) isan herbaceous medicinal plant, originating in South Central America, its leaves and fruits accumulate essential oil rich in ascaridol, activeprinciple responsible for the plant’s vermifuge effect. The present work aims to investigate the Mastruz insecticidal action potential on theweevil Sithophilus zeamais (Coleoptera: Curculionidae) under experimental conditions. The experiments were carried out at the Federal University of Amazonas. 1kg of the vegetal material was collected in the city of Coari, Amazonas for the extraction of the oil and for the extracts containing ethanol. The insects used in the experiment were created in the Zoology laboratory. Thin layer chromatography wasperformed in QBioma laboratory. Samples extracted from the plant, total of 0.010g, and diluted in 10mL of distilled water prepared in vats and5cm x 10cm chromatographic plates were weighed, containing in the vat a 1: 1 mobile phase ratio of 1: 1 of Hexane and ethyl acetate totaling10mL of solution, a separation of the bands was obtained. In the concentrations of oil the efficiency in the insecticidal effect was observed from 15μL, and the ethanolic extracts only at concentrations of 1: 1 \ 2 and 1: 1, showing the plant efficiency as insecticide for the insect-plague.Keywords: Corn weevil. Plant extracts. Plant toxicity. Bioassays. Chromatography.

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B, Barau, Adams A, Adelusi S.M, Danazimi M.S, Jibia S.S, and Umar J. "Bioefficacy of Senna Occidentalis (L) Leaves Exract in the Management of Sitophilus Zeamais (Mots) (Maize Weevil) in Sudan Savannah Ecological Zone of Nigeria." Canadian Journal of Agriculture and Crops 5, no. 1 (2020): 35–40. http://dx.doi.org/10.20448/803.5.1.35.40.

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Santos, Carlos alberto. "INSECTICIDE ACTIVITY OF PLANT EXTRACTS OF THE NORTHEASTERN BRAZILIAN FLORA FOR THE CONTROL OF Sitophilus zeamais [Mots, 1885] AND Sitotroga cerealela [Olivier, 1819." International Journal for Innovation Education and Research 7, no. 8 (2019): 47–62. http://dx.doi.org/10.31686/ijier.vol7.iss8.1648.

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One of the typical crops of the semiarid tropic is the maize Zea mays L., a rustic plant cultivated in the Brazilian northeastern semiarid region mainly by small farmers. It is one of the sources of protein and carbohydrates and an economic alternative for job creation, especially for rural populations. Among the factors limiting its cultivation are pests, among which weevil and Angoumois grain moth. This work aims to evaluate the insecticide activity of plant extracts obtained from medicinal plants of the Brazilian northeastern flora for the control of Angoumois grain moth and weevil under laboratory conditions. The methodology consisted in the production of plant powders, which were mixed with 99.8% alcohol, and then macerated and filtered. Using a rotary evaporator and applying a water bath, it was possible to separate the alcohol from the filtered solution, resulting in a creamy paste, which is the extract itself, later used in tests with insects. Preliminary tests were applied at the concentrations of 0% [control] to 100% ml of extracts. Extracts with a mortality rate ³50% were analyzed by bioassays and four replicates, each consisting of a lot of five insects. The experimental design was completely randomized.

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Tiwari, S., R. B. Thapa, and S. Sharma. "Use of Botanicals for Weevil Management: A Integrated Approach of Maize Weevil (Sitophilus zeamais) Management in A Storage Condition." Journal of the Institute of Agriculture and Animal Science 35, no. 1 (2018): 167–72. http://dx.doi.org/10.3126/jiaas.v35i1.22536.

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A study was conducted at Entomology Laboratory of Agriculture and Forestry University with the aim of evaluating the efficacy of potential plant materials to manage the maize weevil; Sitophilus zeamais Mots. (Coleoptera: Curculionidae) from April to October 2015. The mean temperature and RH of storeroom during the experiment period was 29.37°C and 71.91% RH. A completely randomized design (CRD) was laid out with three replicates. Seven plant materials such as Acorus calamus (rhizome powder) @ 10gm kg-1, Azadirachta indica (seed powder) @ 10gm kg-1, Artemisia vulgaris (leaf dust) @ 10gm kg-1, Zanthoxylum alatum (fruit powder) @ 4gm kg-1, Melia azadirach (seed powder) @ 10gm kg-1, Justicia adhatoda (leaf dust) @ 10gm kg-1 and control were used as treatments. After six months, the lowest percentage maize weight loss (1.5) and lowest grain damage (1.43%) was observed in Acorus calamus treated grains. However, the highest grain damage percentage (18.02%) and weight loss (57.30%) was recorded in control treatment. Similarly, the lowest number of exit holes (3.30) was observed in Acorus calamus treated grains but highest (47.00) were recorded in control. Significantly more numbers of weevil were emerged (57.00) in control treatment whereas only a few (2.70) were recorded in Acorus calamus treated grains. Hence, it is concluded that maize weevil showed less preference to Acorus calamus treated grains with minimum weight loss and less grain damage as compared to other botanicals. This finding is important for promoting locally available botanical materials to manage maize weevil in Nepal.

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Law-Ogbomo, K. E., and D. A. Enobakhare . "Efficacy of Rubber Seed Oil, Palm Oil and Palm Kernel Oil as Grain Protectants against Sitophilus zeamais (Mots.) (Coleoptera: Curculionidae) in three Maize Varieties." Journal of Entomology 3, no. 1 (2005): 40–47. http://dx.doi.org/10.3923/je.2006.40.47.

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Gasnier-Fauchet, F., and P. Nardon. "Comparison of sarcosine and methionine sulfoxide levels in symbiotic and aposymbiotic larvae of two sibling species, Sitophilus oryzae L. and S. zeamais mots. (Coleoptera: Curculionidae)." Insect Biochemistry 17, no. 1 (1987): 17–20. http://dx.doi.org/10.1016/0020-1790(87)90138-7.

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Beshah Tessema, Fekade, Aweke Mulu Belachew, Yilma Hunde Gonfa, et al. "Efficacy of fumigant compounds from essential oil of feverfew (Chrysanthemum parthenium L.) against maize weevil (Sitophilus zeamais Mots.): Fumigant toxicity test and in-silico study." Bulletin of the Chemical Society of Ethiopia 38, no. 2 (2024): 457–72. http://dx.doi.org/10.4314/bcse.v38i2.13.

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Post-harvest insects are among the significant problems in the agricultural sector. The most accessible tools available for managing post-harvest arthropod-pests are fumigants because of the convenience of their applications and fast action in disinfecting. This study aimed to examine the fumigant toxicity of essential oil (EO) against maize weevil and identify the specific fumigants among the major components. The EO was extracted from aerial part of Chrysanthemum parthenium L. using Clevenger apparatus and was tested for fumigant toxicity. GC-MS was used to determine the chemical composition of EO. The major components were identified and screened virtually using Auto dock vina 1.2. in PyRx 0.8 platform. Dm AChE PDB ID: 6XYY was used as a target for molecular docking and malathion and pirimiphusmethyl were used as a reference for comparison. From the results of binding affinities, most of the major EO components showed better fumigant activity than the reference fumigants. More specifically 1,6-dioxaspiro[4,4]non-ene, b-farensen, bornyl-tiglate, g-terpinene, p-cymene, bornyl-acetate, bornyl-isovalerate, terpinen-4-ol, trans-chrysanthenyl-acetate and a-phellandrene were found to be effective fumigants against maize weevil. The above findings suggest that the EO of the aerial part of C. parthenium can be a potential candidate for the development of novel natural fumigants for stored products. KEY WORDS: Essential oil, Fumigants, Insecticides, Binding affinity, Maize weevil Bull. Chem. Soc. Ethiop. 2024, 38(2), 457-472.  DOI: https://dx.doi.org/10.4314/bcse.v38i2.13

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Ayertey, J. N., W. G. Meikle, C. Borgemeister, M. Camara, and R. H. Markham. "Studies on predation of Prostephanus truncatus (Horn) (Col., Bostrichidae) and Sitophilus zeamais Mots. (Col., Curculionidae) at different densities on maize by Teretriosoma nigrescens Lewis (Col., Histeridae)." Journal of Applied Entomology 123, no. 5 (1999): 265–72. http://dx.doi.org/10.1046/j.1439-0418.1999.00365.x.

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COULIBALY SIE YANN, Stephane, Johnson FELICIA, Fanlégué COULIBALY LANCINA, et al. "Diversité des insectes associés aux épis de maïs (Zea mays Linné, 1753) au cours du stockage dans le Nord de la Côte d'Ivoire." African Journal of Tropical Entomology Research 4, no. 1 (2025): 1–12. https://doi.org/10.58697/ajter040101.

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Le maïs (Zea mays Linné, 1753) est la céréale la plus cultivée au monde. Dans le nord de la Côte d'Ivoire, les stocks de maïs fortement attaqués par les insectes ravageurs enregistrent des dégâts importants. Pourtant cette céréale est l’aliment de base des populations de cette région. L'objectif de cette étude est d’identifier les périodes de forte pullulation des insectes ravageurs des stocks d’épis de maïs dans la sous-préfecture de Kanakono. Pour réaliser cette étude, vingt-sept (27) structures de stockage ont été prospectées et 90 épis ont été collectés par structure de stockage. Les épis de maïs ont été prélevés en début de stockage puis à 3, 6 et 9 mois de stockage sur deux années successives de conservation que sont 2021 et 2022. Les insectes ont été collectés après l'égrenage et le tamisage des échantillons prélevés. L’étude a permis d’identifier 18 espèces d'insectes dans les échantillons prélevés. Les espèces d’insectes ravageurs tels que Sitophilus zeamais, Prostephanus truncatus et Tribolium castaneum étaient les plus abondants dans les stocks. Les résultats ont montré qu’au bout de trois mois de stockage Prostephanus truncatus est l'insecte majoritaire avec une abondance relative de 79 % dans les greniers prospectés. Ainsi, les stocks d'épis de maïs de Kanakono sont la cible de nombreux insectes ravageurs, dont, Prostephanus truncatus s’est révélé le plus dominant. Compte tenu des importants dommages que cet insecte cause au maïs stocké, des méthodes de lutte efficientes doivent être envisagées afin de les protéger et réduire les risques d’insécurité alimentaire. Mots clés : Bostrichidae, Coleoptera, Prostephanus truncatus, Conservation, Sécurité alimentaire, Post-récolte, Ravageurs, Côte d'Ivoire

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Sgarbiero, Eduardo, Luiz R. P. Trevizan, and Gilberto C. de Baptista. "Pirimiphos-methyl residues in corn and popcorn grains and some of their processed products and the insecticide action on the control of Sitophilus zeamais Mots. (Coleoptera: Curculionidae)." Neotropical Entomology 32, no. 4 (2003): 707–11. http://dx.doi.org/10.1590/s1519-566x2003000400024.

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Emeribe, EO, NC Ohazurike, and HA Okorie. "Pesticidal Potentials of Seed Extracts Of Black Pepper (Piper Nigrum L) in the Control of Maize Grain Weevil (Sitophilus Zeamais Mots) in Storage." Journal of Agriculture and Food Sciences 13, no. 2 (2016): 1. http://dx.doi.org/10.4314/jafs.v13i2.1.

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Welle, Fatou, Momar Talla Gueye, Ibrahima Sarr, et al. "Etude de l’efficacité de la poudre d’Eucalyptus camaldulensis Dehnh sur Sitophilus zeamais (Motschulsky) et Tribolium castaneum (Herbst) ravageurs du sorgho stocké au Sénégal." International Journal of Biological and Chemical Sciences 16, no. 3 (2022): 1137–48. http://dx.doi.org/10.4314/ijbcs.v16i3.19.

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Le sorgho est l’une des céréales les plus importantes pour la subsistance des populations en Afrique subsaharienne. Malgré son importance, sa conservation reste un problème à cause des insectes tels que Sitophilus zeamaïs et Tribolium castaneum. Les pesticides de synthèse constituent l’un des moyens les plus efficaces pour lutter contre ces ravageurs mais leur impact négatif sur l’environnement et la santé humaine requiert la recherche de méthodes alternatives. La poudre des feuilles sèches d’Eucalyptus camaldulensis a été testée au laboratoire contre S. zeamaïs et T. castaneum pour la conservation du sorgho. Cette poudre, à la granulométrie 0,3 mm, a été appliquée contre ces deux insectes à des doses croissantes de 1, 2, 3 et 4 g/100g. Toutes les doses et les témoins ont a été répétées 3 fois. Pour chaque insecte, 12 individus adultes ont été utilisés avec un sexe ratio de 5 mâles pour 7 femelles. Des lots non traités et d’autres à l’actellic ont servi respectivement de témoin blanc et de référence. Un suivi de la mortalité des insectes a été effectué sur une durée de 14 jours après l’application du produit. Les émergences, les dégâts, et les pertes ont été suivis au bout d’un à trois mois. Les résultats ont révélé une efficacité des doses en particulier celles de 3 g et 4 g. Des mortalités de plus de 50% ont été notées avec la dose 4 g pour S. zeamaïs, et plus de 20% avec la dose 3 g pour T. castaneum, contre 100% pour l’actellic et 0% pour le témoin blanc. Les émergences ont évolué inversement à la mortalité. A la dose 4 g, on observe une très bonne efficacité pour induire la mortalité de S. zeamaïs qui s’est montré beaucoup plus sensible. Des dégâts de l’ordre de 20% sont enregistrés dans le témoin blanc après l’infestation de S. zeamaïs, et seulement 3% dès la dose de 3 g avec 3% de pertes. Pour T. castaneum, les dégâts sont de 13% avec 8% de pertes dans le témoin blanc et 2% de pertes avec la dose 4 g. La poudre d’E. camaldulensis s’est montrée efficace dans la conservation du sorgho contre S. zeamaïs et T. castaneum. Sorghum is one of the most important cereals for people subsistance in sub-Saharan Africa. Despite its importance, the storage remains a problem due to insects such as Sitophilus zeamais and Tribolium castaneum. Synthetic pesticides are one of the most effective means of controling these pests, but their negative impact on the environment and human health required a research for alternatives. The Eucalyptus camaldulensis dried leaves powder has been tested in the laboratory against S. zeamais and T. castaneum for the storage of sorghum. This powder, with a particle size of 0.3 mm, was applied against these two insects at increasing doses of 1, 2, 3 and 4 g/100g. All doses and controls were repeated 3 times. For each insect, 12 adult individuals were used with a sex ratio of 5 males for 7 females. Untreated batches and others with actellic served as untreated and treated controls, respectively. Monitoring of insect mortality was carried out over a period of 14 days after application of the product. Emergence, damage, and losses were monitored after one to three months. The results revealed an effectiveness of the doses in particular those of 3 g and 4 g. Mortalities of more than 50% were noted with the 4 g dose for S. zeamais, and more than 20% with the 3 g dose for T. castaneum, against 100% for the actellic and 0% for the untreated control. Emergences evolved inversely to mortality. At the 4 g dose, very good efficacy has been observed in controlling S. zeamais, which was much more sensitive. A damage level of 20% has been recorded in the untreated control after the infestation by S. zeamais, and only 3% as soon as the dose of 3 g was reached with 3% losses. For T. castaneum, the damage was 13% with 8% losses in the untreated control and 2% losses with the 4 g dose. The powder of E. camaldulensis has been shown to be effective against S. zeamais and T. castaneum for the storage of sorghum.

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Agostinho Marcos, Rodrigues, Filipe Garcia Holtz, Moisés Moura de Oliveira Ramos, et al. "Antixenosis of different maize genotypes in storage affects feeding preferences and oviposition of Sitophilus zeamais Moth." Scientia Agropecuaria 16, no. 3 (2025): 409–16. https://doi.org/10.17268/sci.agropecu.2025.031.

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During corn storage, significant losses occur due to pest attacks, especially the weevil, Sitophilus zeamais Motschulsky. This study aimed to evaluate the feeding preference of Sitophilus zeamais on seeds of stored corn genotypes. The tests were carried out in the laboratory of the Center for Scientific and Technological Development in Pest and Disease Management (NUDEMAFI) at the Center for Agricultural Sciences and Engineering of the Federal University of Espírito Santo (UFES) in Alegre, in an air-conditioned room with a maximum temperature of 26.4 and a minimum of 26.2 ºC (± 2 ºC) and humidity between 70% and 75%. A host preference test with free choice was performed on insects from Nudemafi breeding, aged 5 to 10 days, in six (6) arenas with six (6) replicates using a completely randomized design (CRD). After 96 hours, the following were evaluated for each genotype: number of insects attracted, insect weight, number of infested seeds, percentage of seed loss, and 60 days after infestation, the percentage of emerged insects, physical and bromatological composition were determined. The results showed significant differences in the preference of Sitophilus zeamais adults in relation to the maize genotypes analyzed; the lowest food preference was observed in the Purple genotype (4.1%), followed by AG1051, which obtained 8.3% respectively. The genotypes presented antixenosis due to the effect of the nutritional properties and physical hardness of the seed.

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Prazic-Golic, Marijana, Goran Andric, and Petar Kljajic. "Effects of 50°C temperature on Sitophilus granarius (L.), Sitophilus oryzae (L.) and Sitophilus zeamais (Motsch.)." Pesticidi i fitomedicina 26, no. 3 (2011): 221–27. http://dx.doi.org/10.2298/pif1103221p.

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Adults of laboratory populations of granary weevil (S. granarius), rice weevil (S. oryzae) and maize weevil (S. zeamais) were exposed at the temperature of 50?C to determine lethal time (parameters LT20, LT50 and LT99) and progeny production/reduction in F1 generation at mentioned temperature. For each exposure and each species 25 adults aged 2-5 weeks, in four replicates, were used. In the first treatment, the insects were exposed for 6, 10, 14, 16, 18, 20, 22, 26 and 30 min in plastic dishes (V=200 cm3) with 1.8 ? 0.2g of untreated coarse wheat. In the second treatment, in dishes with 100 g of untreated wheat grain the adults were exposed for 90, 100, 110, 120, 130, 140, 150, 165 and 180 min. After the exposure, the adults were placed in 100 g of untreated wheat grain, in four replicates, at 25 ? 1?C and 60 ? 5% r.h., for recovery. After one, two and seven days of recovery, the weevils were separated by sifting of wheat, and the mortality was determined, and after total period of eight weeks from the exposure of parents, the effect on progeny in F1 generation was determined. Lethal time for weevils was determined by probit analysis, and progeny production/reduction by analysis of variance. After weevils exposure in coarse wheat and after one, two and seven days of recovery, S. oryzae adults were the most susceptible (LT50 12.48-13.68 min), and the most tolerant were adults of S. granarius (LT50 17.79-20.89 min). After insects exposure in wheat grain, the most susceptible were S. granarius and S. oryzae (LT50 107.11-120.73 min), and the most tolerant S. zeamais (LT50 139.90-155.35 min). After exposure of parents of all three weevil species, in coarse wheat, progeny reduction at 100% level is after 22 min. However, after exposure of parents of all three weevil species in wheat grain, progeny reduction at 100% level in S. granarius is after 130 min, in S. oryzae after 150 min, and at 99.7% level in S. zeamais after 180 min. The investigations indicated that short-term exposure of weevils from Sitophilus genus at the temperature of 50?C adversely affects their survival and progeny production, as well as that there is a potential for its successful use as a physical measure in control of storage pest insects.

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Li, Li Xiu, Ling Yan Ge, Ting Xue, and Xi Hong Li. "Insecticidal Effects of the Insecticide Based on Porous Starch and Cinnamon Oil against Sitophilus zeamais." Advanced Materials Research 160-162 (November 2010): 579–84. http://dx.doi.org/10.4028/www.scientific.net/amr.160-162.579.

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We investigated that the bioefficacies of cinnamon oil and insecticide based on the mixture of porous starch and cinnamon oil. They were evaluated for their insecticidal activities and their mortality on adults of Sitophilus zeamais. Fumigant toxicity assayed by hanging in glass jars showed that these chemicals caused significant mortality of the test insect. Cinnamon oil evoked high repellent action and high fumigant toxicity (LD50 = 0.030μL/cm3) against adults of Sitophilus zeamais. The two concentrations of the new insecticide 0.030μL/cm3 (LD50) and 0.040μL/cm3 (the highest) lose their insecticidal activity after a minimum of 144h and 168h, respectively. These results suggest that cinnamon oil starch powder is the most effective insecticide, and could increase its efficacy for use as an alternative to synthetic insecticides.

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Journal articles on the topic 'Sitophilus zeamais (Mots.)'

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