Academic literature on the topic 'Cyclocephala'
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Journal articles on the topic "Cyclocephala"
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Dias, Bruno Mateus Ribeiro, and Sérgio Roberto Rodrigues. "Floral association of adult Cyclocephala tucumana Brethes and Cyclocephala melanocephala (Fabricius) with passion flowers (Passiflora edulis Sims)." EntomoBrasilis 11, no. 2 (August 31, 2018): 144–46. http://dx.doi.org/10.12741/ebrasilis.v11i2.738.
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Abstract. Adults of Cyclocephala tucumana Brethes and Cyclocephala melanocephala (Fabricius) were sampled in yellow passionflower flowers, being the first record of C. tucumana associated with flowers of this plant.Associação floral de adultos de Cyclocephala tucumana Brethes e Cyclocephala melanocephala (Fabricius) com flores de maracujá (Passiflora edulis Sims)Resumo. Adultos de Cyclocephala tucumana Brethes e Cyclocephala melanocephala (Fabricius) foram amostrados em flores de maracujá amarelo, sendo o primeiro registro de C. tucumana associada com flores dessa planta.
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NEITA-MORENO, JHON C. "A review of the black species of Cyclocephala Dejean (Coleoptera: Scarabaeidae: Dynastinae) from Colombia." Zootaxa 5026, no. 1 (August 24, 2021): 1–58. http://dx.doi.org/10.11646/zootaxa.5026.1.1.
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The black species of the genus Cyclocephala Dejean (Coleoptera: Scarabaeidae: Dynastinae: Cyclocephalini) from Colombia are reviewed. I define species groups based on the morphology of adults, re-describe those species occurring in Colombia, describe two new species (Cyclocephala santandereana new species and Cyclocephala arhuacana new species), list the species reported for Colombia, provide a key to identify groups and the species within each group, and present species distribution and life history data. This review includes the Cyclocephala cribrata species group previously defined with C. boucheri Dechambre, C. carbonaria Arrow, C. cribrata Burmeister, C. dechambrei Dupuis, C. boliviana Dechambre, C. dilatata (Prell), C. ergastuli Dechambre, C. latipennis Arrow, C. marqueti Dechambre, C. proxima Dechambre, C. rogerpauli Moore, Branham, & Cave, and C. variolosa Burmeister. The Cyclocephala fasciolata species group contains C. abrelata Ratcliffe & Cave, C. brevipennis Endrödi, C. fasciolata Bates, C. melane Bates, and Cyclocephala santandereana new species. The Cyclocephala ligyrina species group has C. arhuacana new species, C. dalensi Ponchel, C. dyscinetoides Dechambre, C. endroedyyoungai Endrödi, C. kaszabi Endrödi, C. ligyrina Bates, Cyclocephala nigerrima Bates, C. rufa Endrödi, and C. scarabaeina (Gyllenhal). Cyclocephala carinatipennis Martínez & Morón is proposed as a new junior synonym of C. rufa Endrödi. A larva of the Cyclocephala cribrata species group is described for the first time. An analysis of the characters of the adults and the described larva of the species group is performed to imply phylogenetic implications. New country records of C. dalensi and C. marqueti are recorded for Colombia.
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Abarca, Giselle, and Miguel Quesada. "Especies del complejo de jobotos (Phyllophaga spp., Anomala spp y Cyclocephala spp.) asociadas a cultivos, en el Valle Central y Pacífico seco de Costa Rica." Agronomía Mesoamericana 8, no. 2 (June 1, 2016): 44. http://dx.doi.org/10.15517/am.v8i2.24655.
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During 1990 and 1992 speciesofthe white grubs complex Phyllophaga, Anomala and Cyclocephala) were found associated to agricultural crops and to different groups of soils, in cultivated arcas of the Central Valley and Dry Pacific of CostaRica.White grubs raster and male genital, observed with the scanning electron microscope (SEM), were used to identify genera and species. Larvae and adults were identified as Phyllophaga menetriesi, P. obsoleta, P. zunilensis, P. elenans, P. vicina and P. valeriana; Cyclocephala lunulata, C. castaniella and C. sanguinicollis; and Anomala cupricollis and A. granulipyga. The distribution in agricultural crops was: P. menetriesi and P. vicina on coffee (Coffea arabica); P. menetriesi on asparagus (Asparagus officinalis); P. menetriesi, P. obsoleta, P. zunilensis, Anomala spp., Cyclocephala spp., Cyclocephala lunulata on strawberry (Fragaria anannas); P. zunilensis, P. elenans on sugar cane (Saccharum officinarum); P. valeriana on potatoe (Solanum tuberosum) and tomatoe (Lycopersicon esculentum); P. obsoleta, C. castaniella, C. sanxuinicollis and A. granulipyga on kikuyu grass (Penissetum clandestinum) P. menetriesi larvae were found in Andisols grand groups: Melanudands, Hapludands and Haplustands. P. obsoleta in the Melanudands grand group. P. vicina in Hapludands. P. valeriana in the Inceptisols grand group of Ustropepts. Anomala spp. in Hapludands and Cyclocephala spp. in Hapludands and Melanudands.
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Gibernau, Marc, and Denis Barabé. "Pollination ecology of Philodendron squamiferum (Araceae)." Canadian Journal of Botany 80, no. 3 (March 1, 2002): 316–20. http://dx.doi.org/10.1139/b02-006.
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In French Guiana, inflorescences of Philodendron squamiferum Poepp. (Araceae) were regularly visited by the scarab beetle Cyclocephala simulatrix Hölne and (Scarabaeidae, Coleoptera) occasionally by Cyclocephala tylifera Hölne. The flowering cycle lasted 2 days, and the protogynous inflorescence exhibited features typical of beetle pollination (floral chamber, food rewards, flower heating). The spadix temperature was measured during the entire flowering cycle in French Guiana and at the Montreal Botanical Garden. Both sets of measurements gave a similar temperature pattern. The spadix warmed up twice at the beginning of each evening with no notable heat production between the two peaks. These two temperature peaks were well synchronized with the arrival and departure of beetles.Key words: beetle pollination, Cyclocephala, Dynastidae, floral traits, thermogenesis, French Guiana.
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Nogueira, Gerson Aler de Lima, Sérgio Roberto Rodrigues, and Elison Floriano Tiago. "Biological aspects of Cyclocephala tucumana Brethes, 1904 and Cyclocephala melanocephala (Fabricius, 1775) (Coleoptera: Scarabaeidae)." Biota Neotropica 13, no. 1 (March 2013): 86–90. http://dx.doi.org/10.1590/s1676-06032013000100009.
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The studies were conducted on the biological aspects of Cyclocephala tucumana Brethes, 1904 and C. melanocephala (Fabricius, 1775) in Aquidauana, MS, Brazil. From January to December 2009 a light trap was installed to make collections of adults of C. tucumana and from January 2010 to February 2011 for collections of adults of C. melanocephala, at the experimental farm of the Universidade Estadual de Mato Grosso do Sul. Adults were maintained in plastic containers with soil and complete plants of Brachiaria decumbens Stapf cv. Basilisk to oviposition and start biological studies. Adults of C. tucumana were collected from September to November in the field; the embryonic period lasted on average 14.7 days, and the first, second and third larval instars lasted 47.7, 66.1 and 78.6 days, respectively. Pre-pupa and pupa phases lasted 98.2 and 15.1 days, respectively, and longevity of the adults was 13.3 days. From the egg to adult stage of C. tucumana was a period of average 211.2 days. Adults of C. melanocephala were collected from September to October 2010 and February 2011. The embryonic period lasted 17.8 days, and larvae in the first, second and third instars lasted 22.3, 21.0 and 27.0 days, respectively. The pre-pupa stage lasted 11.3 days and pupa phase lasted 13.3 days. The longevity of adults was 26 days, and the cycle from egg to adult lasted 113 days.
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Cavalcante, Tadeu Robson Melo, Ronaldo Veloso Naves, Edivani Villaron Franceschinelli, and Ricardo Pereira da Silva. "Polinização e formação de frutos em araticum." Bragantia 68, no. 1 (2009): 13–21. http://dx.doi.org/10.1590/s0006-87052009000100002.
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O araticum, Annona crassiflora Mart., é fruta típica do Cerrado brasileiro, com potencial econômico e alimentar, entretanto, há baixa produção. O objetivo deste trabalho foi avaliar o sistema reprodutivo do araticum e identificar seus possíveis polinizadores. O experimento foi desenvolvido no Estado de Goiás, Brasil, nos municípios de Goiânia, a 6° 35' 56,0" S 49° 16' 44,4" O; 727 m e Vila Propício, a 15°15' 37,0" S 48(0) 42' 30,9" O; 696 m, em 2004 e 2005. O delineamento foi em blocos ao acaso com quatro tratamentos: polinização cruzada manual (T1); polinização natural (T2); autopolinização espontânea (T3) e autopolinização manual (T4). A viabilidade do pólen foi checada usando carmim acético a 1%. Em 2004, as porcentagens de frutos formados em Goiânia foram de 39,46%; 0% e 0% em T1, T2 e T3, respectivamente. Em Vila Propício foram: 31,11%; 4,65% e 0% em T1, T2 e T3 respectivamente. Em 2005, as porcentagens de frutos formados em Goiânia foram de 64,24%; 4,72%, 0% e 34,38%, em T1, T2, T3 e T4 respectivamente. Em Vila Propício, três espécies de besouros foram coletados nas flores de araticum e identificados como: Cyclocephala atricapilla Mannerheim, Cyclocephala latericia Hohne e Cyclocephala octopunctata Burmeister. Em Goiânia, somente Cyclocephala octopunctata foi coletado. A polinização cruzada manual resultou em alta frutificação. O araticum é espécie autocompatível, mas principalmente alogâmica.
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Paulino-Neto, Hipólito Ferreira. "Polinização e biologia reprodutiva de Araticum-liso (Annona coriacea Mart.: Annonaceae) em uma área de cerrado paulista: implicações para fruticultura." Revista Brasileira de Fruticultura 36, spe1 (2014): 132–40. http://dx.doi.org/10.1590/s0100-29452014000500016.
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Anonáceas, em geral, são espécies cantarófilas e altamente especializadas, apresentando pétalas espessas, carnosas e nutritivas que formam uma câmara floral com ocorrência de termogênege. Este estudo objetivou verificar os efetivos polinizadores e sistema reprodutivo prevalente em A. coriacea. Flores foram marcadas e acompanhadas durante períodos do dia e da noite para verificar os polinizadores legítimos. Tratamentos de polinização manual foram realizados para determinar o sistema reprodutivo. Besouros escarabeídeos Cyclocephala atricapilla e Cyclocephala quatuordecimpunctata (Dynastinae) foram atraídos pelo odor emitido pelas flores no início da noite já contendo pólen em seus corpos e penetraram na câmara floral, onde permaneceram por até 48h alimentando-se das pétalas e de pólen, copulando, e ao tocarem nos estigmas receptivos, depositaram pólen. Posteriormente, flores em fase masculina liberaram pólen que novamente sujou o corpo dos besouros e, com a queda da flor, voaram para outra flor recém-aberta e em fase feminina, iniciando novo ciclo de polinização. A. coriacea é uma espécie autocompatível e Cyclocephala foram polinizadores muito eficientes.
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Vargas, Edgar, and Giselle Abarca. "Relación entre el estrés y las bacterias entomopatógenas Pantoea (Erwinia) agglomerans (herbicola) y Bacillus cereus en jobotos (Col: Melolonthidae) (Phyllophaga spp., Anomala spp. y Cyclocephala spp.), en Costa Rica." Agronomía Mesoamericana 9, no. 2 (May 30, 2016): 25. http://dx.doi.org/10.15517/am.v9i2.19466.
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Concentrations of Colony Forming Units (CFU) were determined for two entomopathogenic bacteria (Pantoea agglomerans and Bacillus cereus), at the egg, larval, pupal, and adult stages of agriculturally important Phyllophaga and Cyclocephala white grubs, which were collected in five agroecosystems in Costa Rica. L2 and L3 larvae of Phyllophaga elenans collected in all regions where the study was conducted were extensive carriers of Pantoea agglomerans and Bacillus cereu. L2 and L3 larvae of Phyllophaga obsoleta, Phyllophaga menetriesi, Cyclocephala sanguinicollis and Cyclocephala castaniella found in the Central Valley and Central Pacific regions were carriers of Pantoea agglomerans and Bacillus cereus bacteria. In 60% to 90% of larvae in all white grub varieties studied, Pantoea agglomerans showed greater concentrations of CFU than Bacillus cereu, which showed the lowest CFU concentration. Egg, pupal, and adult mortality in all Phyllophaga species was due to Pantoea agglomerans in 62%, 80% and 22.5% of the cases, respectively. A possible antagonistic interaction between Pantoea agglomerans and Bacillus cereus is also discussed. In general, it was noted that light and larval manipulation were the main stress factors affecting these scarabids.
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Santos, Viviane, and Crébio José Ávila. "ASPECTOS BIOECOLÓGICOS DE Cyclocephala forsteri ENDRODI, 1963 (COLEOPTERA: MELOLONTHIDAE) NO ESTADO DO MATO GROSSO DO SUL." BRAZILIAN JOURNAL OF AGRICULTURE - Revista de Agricultura 82, no. 3 (November 26, 2015): 298. http://dx.doi.org/10.37856/bja.v82i3.1470.
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Bran, Alejandra María, Martha Eugenia Londoño, and Luis Carlos Pardo. "Morfología de estados inmaduros de tres especies de Cyclocephala (Coleoptera: Melolonthidae) con una clave para larvas de tercer estado en Colombia." Corpoica Ciencia y Tecnología Agropecuaria 7, no. 2 (January 4, 2007): 58. http://dx.doi.org/10.21930/rcta.vol7_num2_art:71.
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<p>Las larvas de algunas especies de escarabajos rizófagos constituyen un serio problema fitosanitario en varias regiones agrícolas de Colombia; conforman comunidades en las que ocurren especies dañinas e inocuas cuya similitud morfológica aparente dificulta su diferenciación y limita el diagnóstico en campo. A fin de aportar soluciones a esta situación se realizaron muestreos de larvas del género <em>Cyclocephala</em>, uno de los más frecuentes en los cultivos de seis municipios de Antioquia y uno de Caldas (Colombia). Las larvas obtenidas se criaron y codificaron individualmente para facilitar la observación de su desarrollo hasta el estado de adulto y hacer una identificación positiva. Se colectaron en total 82 larvas representativas de <em>Cyclocephala fulgurata, C. lunulata </em>y <em>C. gregaria</em>, de las cuales se describen caracteres e ilustran estructuras diagnósticas. A partir de una matriz de 70 caracteres se seleccionaron seis (relativos a la quetotaxia craneal, la maxila y el tarsúngulo) que hicieron posible elaborar una clave para identificar las larvas de tercer estadio del género.</p><p><strong> </strong></p><p><strong>Morphology of immature stages of three species of Cyclocephala and taxonomic key to third-instar larvae (Coleoptera: Melolonthidae) in Colombia</strong></p><p>Some larvae species of rhizophagous beetles constitute themselves in a serious phytosanitary problem in several agricultural regions of Colombia as they conform communities, both harmful and innocuous, but apparent morphologic similarities makes it difficult to differentiate them, limiting the field diagnosis. To contribute to the study of this problem, samplings of one of the most abundant collected species, Cyclocephala larvae, were made, in crops of six towns of Antioquia and one of Caldas. To facilitate positive adult observation, larvae were individually numbered. In all, eighty two larvae of Cyclocephala fulgurate, C. lunulata and C. gregarious were collected and their characteristic and diagnostic features described and illustrated. From a matrix of seventy characters, six cranial quetotaxic, maxilar and tarsungular characters were used to make a taxonomic key to identify the third-instar larvae.</p>
Dissertations / Theses on the topic "Cyclocephala"
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Maia, Artur Campos Dália. "Olfactory attraction in Cyclocephalini-Aroid pollination systems and captivity rearing of Cyclocephala." Toulouse 3, 2011. http://thesesups.ups-tlse.fr/1594/.
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J'ai étudié les systèmes de pollinisation hautement spécialisés existant entre les Aracées néotropicales et les coléoptères de la tribu des Cyclocephalini (Scarabaeidae, Dynastinae), et aussi l'ontogénie et le développement d'espèces de Cyclocephala élevées en captivité. Les coléoptères floricoles (mâles et femelles) de Cyclocephala celata et C. Latericia montrent une attraction pour de signaux olfactifs simples présents dans les senteurs florales de Caladium bicolor, Philodendron acutatum et Taccarum ulei. Des molécules synthétisées de 4-methyl-5-vinilthiazole et (S)-2-hydroxy-5-methyl-3-hexanone, deux composés rares issus de voies biosynthétiques différentes, et majeurs des odeurs florales des trois espèces d'Aracées étudiées, se sont avérées très attractives et de manière sélective pour les espèces pollinisatrices de Cyclocephala. En élevage, quatre espèces de Cyclocephala indigènes de la forêt Atlantique du Nord-est Brésil, C. Celata, C. Distincta, C. Latericia et C. Paraguayensis, furent maintenues en captivité durant tout leur cycle biologique grâce à un protocole a simple et économique. Des œufs viables furent pondus pour toutes les espèces, et pour trois d'entre elles le stade imago fut obtenu à partir d'une diète exclusivement saprophage des larves. Des perspectives de production contrôlée à grande échelle de ces pollinisateurs spécialisés offre des opportunités intéressantes pour la gestion environnementale des systèmes biologiques en interactionI studied highly specialized pollination systems involving Neotropical Araceae and scarab beetles of the tribe Cyclocephalini (Scarabaeidae, Dynastinae), and also scrutinized aspects of the ontogeny and egg development of captivity bred and reared species of Cyclocephala. Flower-visiting male and female Cyclocephala celata and C. Latericia exhibit direct attractive response to simple chemolfactory signals in the floral scents of the Caladium bicolor, Philodendron acutatum and Taccarum ulei. Pure authentic standards of 4-methyl-5-vinilthiazole and (S)-2-hydroxy-5-methyl-3-hexanone, two rare and biosynthetically diverse compounds identified as prominent constituents in floral fragrance samples among the three species of aroids, were successfully used in fragrant baits to selectively lure pollinating cyclocephaline scarab beetles. Four species of Cyclocephala native to the Atlantic Forest of northeastern Brazil, C. Celata, C. Distincta, C. Latericia and C. Paraguayensis, were successfully maintained in captivity with a simple, inexpensive rearing protocol. All species yielded viable eggs and three of them also yielded healthy imagoes on an exclusively saprophagous diet for the larvae. Near future perspectives for the controlled, large-scale reproduction of these specialized pollinators offer interesting opportunities for environmental management plans of interacting biological systems
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Paz, Ordoñez Carlos Fernando Bennedicth. "El género Cyclocephala Dejean, 1821 (Coleoptera: Scarabaeidae: Dynastinae) en la Amazonía peruana." Bachelor's thesis, Universidad Nacional Mayor de San Marcos, 2021. https://hdl.handle.net/20.500.12672/16727.
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El género Cyclocephala (Coleoptera: Scarabaeidae: Dynastinae) cuenta con aproximadamente 350 especies; y tiene amplia distribución en el continente americano. Este género es conocido por incluir especies que son consideradas una plaga tanto en estadio larval, como adultos; aunque también incluye especies que destacan por su función como polinizadores. En este trabajo se revisa taxonómicamente e identifica las especies de Cyclocephala que ocurren en la amazonia peruana. Se encontraron un total de 62 especies, 48 ya descritas y 14 potencialmente nuevas. Se reportan por primera vez para Perú seis especies Cyclocephala emarginata Endrödi; C. guianae Endrödi; C. kuntzeniana Höhne; C. malyi Dupuis; C. ovulum Bates y C. sylviae Dechambre. Se proporciona una lista anotada de especies, así como la diagnosis, fotografías y mapas de distribución de cada una. Finalmente, se concluye que, en la Amazonia peruana, el género Cyclocephala alberga un número mayor de especies de las previamente registradas.
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Moore, Matthew Robert. "Disentangling the phenotypic variation and pollination biology of the Cyclocephala Sexpunctata species complex (Coleoptera: Scarabaeidae: Dynastinae)." Thesis, Wichita State University, 2011. http://hdl.handle.net/10057/5034.
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Researching cryptic biodiversity is an integrative process that uses a “total evidence” approach to identify population-level evolutionary lineages (species). Cryptic species of aroids have been discovered but the existence of cryptic pollinator species has not been addressed. The highly polymorphic scarab beetle, Cyclocephala sexpunctata, is a hypothesized pollinator of two cryptic aroid species. This research integrates detailed morphological data, spatial and distribution data, mitochondrial CO1 sequence data and host plant associations to test the hypothesis that cryptic species of Cyclocephala are visiting aroid flowers. Nine morphologically similar Cyclocephala species were included to address identification problems among similar species. A new country record was found for C. pan (Honduras). A female paratype specimen of C. letiranti was determined to be a female C. sexpunctata raising the possibility that there are no female type specimens of C. letiranti. Four unique male paramere forms (morphotypes) were found in C. sexpunctata and the allied species C. brevis. These paramere forms were associated with four female morphotypes that have a diagnostic form of the ventral surface of the epipleural pillow. The ventral form of the female epipleural pillow is described here for the first time and is a new character for the genus Cyclocephala. Detailed elevational and distribution data indicate that the morphotypes of C. sexpunctata and C. brevis are rarely collected together at specific localities. A checklist of cyclocephaline floral associations was compiled. Examination of voucher specimens and published floral associations indicate that the morphotypes described here visit different species of flowers within their hypothesized elevational range. Mitochondrial CO1 data demonstrate that C. sexpunctata is polyphyletic but the monophyly of C. brevis could not be addressed. The combination of these datasets indicates that the morphotypes described here are cryptic species though their taxonomy remains unresolved due to large numbers of synonyms.Thesis (M.S.)--Wichita State University, College of Liberal Arts and Sciences, Dept. of Biological Sciences.
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SOUZA, Tamyrys Bezerra de. "Aspectos biológicos, descrição dos imaturos e comportamento de cópula de cyclocephala distincta burmeister (coleoptera: dynastinae, cyclocephalini)." Universidade Federal de Pernambuco, 2013. https://repositorio.ufpe.br/handle/123456789/11798.
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O presente trabalho objetivou conhecer aspectos biológicos, descrever os imaturos e obter informações sobre o comportamento sexual de Cyclocephala distinta Burmeister (Cyclocephalini, Scarabaeidae), uma espécie antófila comumente encontrada na região Nordeste, Brasil. Para isso, espécimes adultos foram coletados em um fragmento de Floresta Atlântica no estado de Pernambuco, Brasil e submetidos a criação em cativeiro sob condições ambiente. Foram analisadas a taxa de eclosão, o ciclo de vida, os parâmetros de postura, a mortalidade de adultos e imaturos, os caracteres morfológicos externos dos imaturos, o repertório comportamental sexual dos adultos e os caracteres morfológicos relacionados à cópula da espécie. Os dados de mortalidade de fêmeas que realizaram ou não posturas, e de indivíduos mantidos em cativeiro isolados e em conjunto foram comparados pelo teste t de Student. Para descrição dos imaturos, seguiu-se a terminologia de Ritcher (1966) e Böving (1936). O repertório de cópula de 20 casais foi acompanhado a partir de observações diretas e imagens digitalizadas. A seqüência do comportamento foi descrita usando o método de amostragem "todas as ocorrências" e registrada em forma de etograma e fluxograma. Medidas dos caracteres morfológicos entre os sexos foram comparadas através do teste t de Student. Em cativeiro, a duração média do ciclo de vida foi de 108,4 dias (n = 45). A fase de ovo durou em média 10,9 dias e a taxa de eclosão foi de 73,9%. A fase imatura durou em média 93,4 dias e o terceiro instar apresentou o maior indíce de sobrevivência (97,4%) e duração (40,4 dias). A média de ovos por fêmea foi de 15,5, o período reprodutivo total de 3,3 dias e a fertilidade total de 81,2%. A mortalidade não foi influenciada pela fisiologia reprodutiva, nem pelo isolamento, nem pelo sexo dos indivíduos. Na descrição dos imaturos foi documentado, pela primeira vez para o gênero, um número maior de cerdas da chaetoparia direta quando comparada à esquerda no 3º instar. Também é inédito para o gênero a presença dois tubercúlos externoapicais na protíbia da pupa. Foram registradas 13 categorias e 37 sub-categorias comportamentais em 37 h de observação, distribuídas entre as fases de pré-cópula, cópula e pré-soltura. Durante a pré cópula, a aproximação entre os sexos se deu principalmente pela "procura" do macho pela fêmea (65%). Foram evidentes os comportamentos de rejeição da fêmea e insistência do macho, denominados de luta pré-cópula. A cópula teve duração média de 7min39s e apresentou corte copulatória. Finalizada a cópula, a maioria dos machos permaneceu sobre o dorso da fêmea (80%), o que aumentou a rejeição dela. Fêmeas apresentaram maior largura corporal que os machos e os machos apresentaram comprimentos das pernas meso- e metatorácicas maiores que o das fêmeas. O edeago apresentou 2,8 e 0,7 mm de comprimento e largura, respectivamente e a largura média da depressão do élitro, registrado apenas na fêmea, foi de 2,0 mm. Foram registradas 11 combinações possíveis de máculas, quatro (três exclusivas) nas fêmeas e sete (seis exclusivas) nos machos.
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Wu, Shaohui. "Efficacy of Entomopathogenic Nematodes and Entomopathogenic Fungi against Masked Chafer White Grubs, Cyclocephala spp. (Coleoptera: Scarabaeidae)." Diss., Virginia Tech, 2013. http://hdl.handle.net/10919/50620.
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Entomopathogenic nematodes (EPN) (Heterorhabditis bacteriophora and H. megidis) and entomopathogenic fungi (EPF) (Metarhizium anisopliae and Beauveria bassiana) were evaluated for efficacy against masked chafer white grub, Cyclocephala spp., under laboratory and greenhouse conditions, as well as their efficacy against various grub stages in the field. Under both laboratory and greenhouse conditions, additive interactions were found between EPN and EPF in their combined application against Cyclocephala spp., except a few observations that showed antagonism or synergism. Significantly greater control occurred from the combination of a nematode and a fungus compared with a fungus alone, but not compared with a nematode alone. The combined effect did not differ significantly for nematode and fungi applied simultaneously or at different times. EPF had no significant impact on EPN infection and production of infective juveniles (IJs) in grub carcasses. Nematodes alone or in combination with fungi were comparable to the insecticide Merit 75 WP (imidacloprid) against 3rd instar Cyclocephala spp in the greenhouse. Efficacy of EPF and EPN varied dramatically between field sites and conditions; EPN and EPF applied alone or in combination were less effective than Merit 75 WP in >50% field trials, but some EPN + EPF treatments were more effective than the insecticide in reducing grub numbers. EPN and EPF showed better potential than insecticides for providing extended control of white grubs in the subsequent generation. In addition, the sub-lethal effects of EPF on southern masked chafer, C. lurida, were investigated. Neither M. anisopliae nor B. bassiana had a sub-lethal effect on grub weight gain, adult longevity, oviposition, pupation and eclosion. Finally, interaction between H. bacteriophora and M. anisopliae was examined to determine the potential of the nematode in improving fungal distribution in soil. H. bacteriophora enhanced fungal distribution in sandy loam soil without grass thatch, but not in sandy soil with thatch. In both soil types, soil depths significantly affected nematode and fungal distribution. In water profile, M. anisopliae conidia germinated hyphae that attached to sheath of H. bacteriophora IJs, which molted to detach from the fungus. IJs mortality and virulence were not affected by the presence of M. anisopliae.Ph. D.
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Doskocil, Joseph P. "Evaluating the ocurrence [sic], seasonal history, species composition and impact of Phyllophaga and Cyclocephala grubs infesting bermudagrass (Cynodon spp.) in Oklahoma." 2007. http://digital.library.okstate.edu/etd/umi-okstate-2291.pdf.
Full textBook chapters on the topic "Cyclocephala"
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Hangay, George, Susan V. Gruner, F. W. Howard, John L. Capinera, Eugene J. Gerberg, Susan E. Halbert, John B. Heppner, et al. "Masked Chafers, Cyclocephala spp. (Coleoptera: Scarabaeidae)." In Encyclopedia of Entomology, 2301. Dordrecht: Springer Netherlands, 2008. http://dx.doi.org/10.1007/978-1-4020-6359-6_1738.
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Vittum, Patricia J. "Scarabaeid Pests: Subfamily Dynastinae." In Turfgrass Insects of the United States and Canada, 193–204. Cornell University Press, 2020. http://dx.doi.org/10.7591/cornell/9781501747953.003.0014.
Full textAbstract:
This chapter examines masked chafers, which belong to the large genus of North and South American beetles, the Cyclocephala, in the order Coleoptera, family Scarabaeidae, subfamily Dynastinae, tribe Cyclocephalini. Approximately a dozen of these species occur in North America, but only five species are regularly associated with turfgrass cultivation: the northern masked chafer; the southern masked chafer; Cyclocephala pasadenae (Casey); Cyclocephala hirta LeConte; and Cyclocephala parallela Casey. Masked chafer grubs are important turfgrass-infesting species, causing extensive damage to cultivated turf during late summer and early fall. They are the most injurious root-feeding pests of turfgrass throughout much of the Ohio River Valley and the midwestern United States. Adult masked chafers have blunt spatulate mandibles that are unsuited for feeding on plant tissues; as far as is known, they do not feed.
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"Cyclocephaly." In Encyclopedia of Ophthalmology, 565. Berlin, Heidelberg: Springer Berlin Heidelberg, 2018. http://dx.doi.org/10.1007/978-3-540-69000-9_100474.
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