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Journal articles on the topic 'Heterorhabditis'

Author: Grafiati

Published: 4 June 2021

Last updated: 26 July 2025

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1

Kary, Naser Eivazian, Gholamreza Niknam, Seyed Abolgasem Mohammadi, Christine Griffin, and Mohammad Moghaddam. "A survey of entomopathogenic nematodes of the families Steinernematidae and Heterorhabditidae (Nematoda: Rhabditida) in the north-west of Iran." Nematology 11, no. 1 (2009): 107–16. http://dx.doi.org/10.1163/156854108x398453.

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AbstractDuring 2002-2004, a survey of entomopathogenic nematodes was conducted for the first time in Iran throughout the three provinces in the north-west of the country. Soil samples were tested for the presence of steinernematid and heterorhabditid nematodes by baiting with Galleria mellonella larvae. Of the 833 soil samples studied 27 were positive for entomopathogenic nematodes (3.2%), with 17 (2.0%) containing Heterorhabditis and ten (1.2%) Steinernema isolates. Morphological and molecular studies were carried out to characterise isolates. The Heterorhabditis isolates were identified as H

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Nikdel, Mostafa, Gholamreza Niknam, Christine T. Griffin, and Naser Eivazian Kary. "Diversity of entomopathogenic nematodes (Nematoda: Steinernematidae, Heterorhabditidae) from Arasbaran forests and rangelands in north-west Iran." Nematology 12, no. 5 (2010): 767–73. http://dx.doi.org/10.1163/138855410x12628646276168.

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Abstract A survey for entomopathogenic nematodes (EPN) was carried out in the Arasbaran forests and rangelands, East Azarbaijan province, north-west Iran, during 2006 to 2008. A total of 691 soil samples were collected from 62 localities across the region of which 21 samples (3%) were positive for EPN, including nine samples (1.3%) with heterorhabditids and 12 (1.7%) with steinernematids. Seven isolates (four Steinernema and three Heterorhabditis) were recovered from rangelands and 14 (eight Steinernema and six Heterorhabditis) from forest soil samples. Based on morphology and molecular studie

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Griffin, C. T., R. Chaerani, D. Fallon, A. P. Reid, and M. J. Downes. "Occurrence and distribution of the entomopathogenic nematodes Steinernema spp. and Heterorhabditis indica in Indonesia." Journal of Helminthology 74, no. 2 (2000): 143–50. http://dx.doi.org/10.1017/s0022149x00000196.

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AbstractSoil samples from 79 sites on five islands of Indonesia were baited with insects for the recovery of entomopathogenic nematodes. Heterorhabditis and Steinernema were equally prevalent, and were recovered from 11.7% of samples representing 20.3% of sites sampled. Both genera were recovered from coastal sites only. Entomopathogenic nematodes were more prevalent on the Moluccan islands of Ambon and Seram than on Java or Bali. They were not detected on Sulawesi, where non-coastal sites only were sampled. RFLP analysis was used in the identification of nematode isolates. Heterorhabditis ind

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Griffin, C. T., R. Chaerani, D. Fallon, A. P. Reid, and M. J. Downes. "Occurrence and distribution of the entomopathogenic nematodes Steinernema spp. and Heterorhabditis indica in Indonesia." Journal of Helminthology 74, no. 2 (2000): 143–50. http://dx.doi.org/10.1017/s0022149x00700812.

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AbstractSoil samples from 79 sites on five islands of Indonesia were baited with insects for the recovery of entomopathogenic nematodes. Heterorhabditis and Steinernema were equally prevalent, and were recovered from 11.7% of samples representing 20.3% of sites sampled. Both genera were recovered from coastal sites only. Entomopathogenic nematodes were more prevalent on the Moluccan islands of Ambon and Seram than on Java or Bali. They were not detected on Sulawesi, where non-coastal sites only were sampled. RFLP analysis was used in the identification of nematode isolates. Heterorhabditis ind

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Mason, J. M., A. R. Razak, and D. J. Wright. "The recovery of entomopathogenic nematodes from selected areas within Peninsular Malaysia." Journal of Helminthology 70, no. 4 (1996): 303–7. http://dx.doi.org/10.1017/s0022149x00015595.

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AbstractSoil sampling was conducted within Peninsular Malaysia with the aim of recovering entomopathogenic nematodes (Steinernematidae and Heterorhabditidae). Extensive sampling was performed in the Cameron Highlands, which are climatically distinct from the lowlands, and characterized by lower temperature and humidity. The major areas sampled in the lowlands were at the campus of Universiti Pertanian Malaysia (orchards and plantations), Puchong (secondary rainforest) and along the east coast of the country. Entomopathogenic nematodes were recovered using the Galleria mellonella baiting method

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Griffin, Christine T., Ilona Dix, Susan A. Joyce, Ann M. Burnell, and Martin J. Downes. "Isolation and characterisation of Heterorhabditis spp. (Nematoda: Heterorhabditidae) from Hungary, Estonia and Denmark." Nematology 1, no. 3 (1999): 321–32. http://dx.doi.org/10.1163/156854199508199.

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Abstract Targeted surveys were conducted for the entomopathogenic nematode Heterorhabditis in areas of Denmark, Estonia and Hungary. Isolates were identified by IEF, PCR and cross-fertility tests as belonging to three distinct taxonomic groups: H. bacteriophora, the north-west European (NWE) type of H. megidis and the Irish type of Heterorhabditis. The Irish and NWE types of Heterorhabditis were both present in Denmark (at six and four sites, respectively), while only the NWE type was recovered in Estonia. H. bacteriophora was the dominant heterorhabditid identified in Hungary (ten sites), but

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Alotaibi, Saqer S., Hadeer Darwish, Madiha Zaynab, et al. "Isolation, Identification, and Biocontrol Potential of Entomopathogenic Nematodes and Associated Bacteria against Virachola livia (Lepidoptera: Lycaenidae) and Ectomyelois ceratoniae (Lepidoptera: Pyralidae)." Biology 11, no. 2 (2022): 295. http://dx.doi.org/10.3390/biology11020295.

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Virachola livia (Lepidoptera: Lycaenidae) and Ectomyelois ceratoniae (Lepidoptera: Pyralidae) are the key pests of pomegranates in Saudi Arabia that are managed mainly using broad-spectrum pesticides. Interactions between the entomopathogenic nematodes (EPNs) Steinernematids, and Heterorhabditids, and their entomopathogenic bacterial symbionts (EPBs) have long been considered monoxenic 2-partner associations responsible for killing insects and, therefore, are widely used in insect pest biocontrol. However, there are limited reports identifying such organisms in Taif, Saudi Arabia. The current

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O'LEARY, S. A., A. M. BURNELL, and J. R. KUSEL. "Biophysical properties of the surface of desiccation-tolerant mutants and parental strain of the entomopathogenic nematode Heterorhabditis megidis (strain UK211)." Parasitology 117, no. 4 (1998): 337–45. http://dx.doi.org/10.1017/s0031182098003151.

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Entomopathogenic nematodes (EPN) are useful biological control agents of insect pests. However, the infective juvenile (IJ) stage which is the only stage to occur outside the host is susceptible to environmental extremes such as desiccation. We have isolated desiccation-tolerant strains of the EPN Heterorhabditis megidis. In this paper we describe the surface properties of these desiccation-tolerant mutants. Heterorhabditid IJs retain the sheath of the previous larval stage. The mutant lines possess alterations in the surface properties of the sheath. Differences were observed in fluorescent l

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Santos, Viviane, Alcides Moino Junior, Vanessa Andaló, Camila Costa Moreira, and Ricardo Alves de Olinda. "Virulence of entomopathogenic nematodes (Rhabditida: Steinernematidae and Heterorhabditidae) for the control of Diabrotica speciosa germar (coleoptera: chrysomelidae)." Ciência e Agrotecnologia 35, no. 6 (2011): 1149–56. http://dx.doi.org/10.1590/s1413-70542011000600015.

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Entomopathogenic nematodes (EPNs) are used in biological control of soil insects and show promise in the control of D. speciosa. The objective of this work was to evaluate the potential of native and exotic entomopathogenic nematode isolates in the control of D. speciosa under laboratory and greenhouse conditions. Results showed that all of EPNs caused larval mortality. The most virulent were Heterorhabditis sp. RSC01 (94%), Steinernema glaseri (84%), Heterorhabditis sp. JPM04 (82%) and Heterorhabditis amazonensis RSC05 (78%). There was no effect of the Heterorhabditis sp. RSC01 and S. glaseri

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Majić, Ivana, Ankica Sarajlić, Tamás Lakatos, et al. "Virulence of new strain of Heterorhabditis bacteriophora from Croatia against Lasioptera rubi." Plant Protection Science 55, No. 2 (2019): 134–41. http://dx.doi.org/10.17221/119/2018-pps.

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Soil samples from 100 cultivated and natural sites were assessed for the presence of entomopathogenic nematodes. Heterorhabditid nematodes were recovered from three soil samples during spring months, with the overall positive sample rate of 3%. The isolates of entomopathogenic nematodes were identified as three different strains conspecific with Heterorhabditis bacteriophora (Heterorhabditidae). They were found from natural sites and vineyard, while no recovery occurred from intensively cultivated agricultural fields. The morphometrical characteristics of infective juveniles and males showed d

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Alves, V. S., A. Moino Junior, L. V. C. Santa-Cecilia, V. Andaló, and G. C. Souza. "PATOGENICIDADE DE NEMATÓIDES ENTOMOPATOGÊNICOS A COCHONILHA-DARAIZ-DO-CAFEEIRO DYSMICOCCUS TEXENSIS (TINSLEY) (HEMIPTERA: PSEUDOCOCCIDAE) EM LABORATÓRIO." Arquivos do Instituto Biológico 76, no. 1 (2009): 67–73. http://dx.doi.org/10.1590/1808-1657v76p0672009.

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RESUMO A cochonilha-da-raiz-do-cafeeiro Dysmicoccus texensis (Tinsley) ataca as raízes desta planta, podendo causar sérios danos às plantações e conseqüentes perdas na produção. Os nematóides entomopatogênicos (NEPs) são agentes eficientes no controle de várias pragas encontradas no solo, o que sugere provável eficiência no controle da cochonilha-da-raiz-do-cafeeiro. Dessa forma, este trabalho teve por objetivo avaliar a patogenicidade de alguns isolados de NEPs à cochonilhada-raíz-do-cafeeiro através de testes de seleção de isolados, determinação da concentração letal máxima (CLM99) e patogen

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Guide, Bruna Aparecida, Viviane Sandra Alves, Thiago Augusto Paes Fernandes, Matheus Corseti Marcomini, Ana Maria Meneguim, and Pedro Manuel Oliveira Janeiro Neves. "Selection of entomopathogenic nematodes and evaluation of their compatibility with cyantraniliprole for the control of Hypothenemus hampei." Semina: Ciências Agrárias 39, no. 4 (2018): 1489. http://dx.doi.org/10.5433/1679-0359.2018v39n4p1489.

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Attack by the coffee berry borer Hypothenemus hampei causes significant damage to coffee crops because it affects the quality of the coffee fruit during different developmental stages, which results in production losses. Control of the borer is difficult owing to its cryptic behavior and the fact that it spends its entire life cycle inside the coffee berries. This makes it difficult for natural enemies to reach it, as well as for it to come into contact with chemical insecticides. The objective of the present study was to select and evaluate the virulence of entomopathogenic nematodes (EPNs) o

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Qodiriyah, Qodiriyah, Didik Sulistyanto, and Purwatiningsih Purwatiningsih. "Biological Control Entomopathogenic Nematodes Heterorhabditis sp. and Steinernema sp. Pest Control Termite Land As Coptotermes sp. and Microtermes sp. in The District Lumajang." Jurnal ILMU DASAR 16, no. 1 (2015): 43. http://dx.doi.org/10.19184/jid.v16i1.1518.

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This research aims to find out the most effective concentration (LC50) and the most effective time (LT50) and to select a biological agent netamoda of nematodes Steinernema sp. dan Heterorhabditis sp. as the environmentally friendly biological control agents on the ground termite Coptotermes sp. and Microtermes sp. in Lumajang. All the data were analyzed by using the termite mortality percentage variance analysis. The LC50 and LT50 were tested by using the probit analysis. Therefore, the empirical probit values were obtained from the percentage of mortality after they were calculated by the Ab

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Qian, Xiu Juan, Li Na Gu, Yu Fang Xing, and Chang ZHong Liu. "Entomopathogenic Nematodes Isolated from Gansu Province and Four New Species in China." Applied Mechanics and Materials 651-653 (September 2014): 328–36. http://dx.doi.org/10.4028/www.scientific.net/amm.651-653.328.

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With the morphological characters, anatomy and molecular biology research, 29 entomopathogenic nematodes populations isolated from Gansu province were identified and the resoult showed that they were 8 species of EPN, Steinernema feltiae,Steinernema bicornutum,Steinernema affin,Steinernema krusse and Steinernema karil were belong to Steinernema while Heterorhabditis brevicaudis,Heterorhabditis megidi and Heterorhabditis marelatu were belong to Heterorhabditis respectively. And what more research found that S. affin,S. krusse,S. karil and H. marelatu were new species in China.

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Nguyen, Ngoc Chau, Ke Long Phan, Maurice Moens, and Sergei Subbotin. "Heterorhabditis baujardi sp. n. (Rhabditida: Heterorhabditidae) from Vietnam and morphometric data for H. indica populations." Nematology 5, no. 3 (2003): 367–82. http://dx.doi.org/10.1163/156854103769224368.

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AbstractA survey of entomopathogenic nematodes in Vietnam yielded several Heterorhabditis isolates. The majority belonged to H. indica; their morphometrics are given in this paper. Three isolates collected in forests in Backan, Ninhbinh and Kontum provinces, Vietnam are here described as a new species Heterorhabditis baujardi sp. n. The new species is distinguished from the other ten valid Heterorhabditis species by a combination of morphological, morphometrical, and DNA characters. Heterorhabditis baujardi sp. n. is morphometrically similar to H. indica, but can be separated from this species

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Maulida, Hawwa' Cahya, Saiku Rokhim, and Erna Zahro’in. "Patogenitas Nematoda Entomopatogen Heterorhabditis spp. Terhadap Larva Spodoptera litura." JURNAL Al-AZHAR INDONESIA SERI SAINS DAN TEKNOLOGI 6, no. 2 (2021): 96. http://dx.doi.org/10.36722/sst.v6i2.809.

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<p><strong>Spodoptera litura is a pest in vegetable plants that attacks the leaves and stems. Damage arising from the attack of S. litura can decrease the productivity of plants. Synthetic pesticides are often used in controlling the population of S. litura, but synthetic pesticides have a high negative impact. Potential entomopathogenic nematode Heterorhabditis spp. believed to be effective for controlling pest populations. This study aims to find out the pathogenic value of entomopathogenic nematode Heterorhabditis spp. to the larvae of S. litura. Based on the results obtained He

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KHALID, AYMAN WALEED, and SAMIRA A. KHLAYWI AND SAFAA ZAKARIA BAKER. "Identification and Molecular Analysis of Indigenous Entomopathogenic Nematodes, Steinernema, and Heterorhabditis in Iraq." BIOPESTICIDES INTERNATIONAL 19, no. 02 (2023): 207. http://dx.doi.org/10.59467/bi.2023.19.207.

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A survey was conducted in some northern regions of Iraq between 2021 and 2022 to evaluate the diversity of entomopathogenic nematodes in these areas. Entomopathogenic nematodes were isolated from soil using the Galleria trap technique. Molecular identification illustrated that these isolates belong to two genera of entomopathogenic nematodes, Heterorhabditis, and Steinernema. The results of the molecular analysis also showed the presence of Steinernema isolates in the Al-Rashidiyah region in Mosul, Iraq. Heterorhabditis nematodes were isolated from Salah Al-Din, Samarra, and Al-Jadriya, Baghda

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Gaudriault, S., E. Duchaud, A. Lanois, et al. "Whole-Genome Comparison between Photorhabdus Strains To Identify Genomic Regions Involved in the Specificity of Nematode Interaction." Journal of Bacteriology 188, no. 2 (2006): 809–14. http://dx.doi.org/10.1128/jb.188.2.809-814.2006.

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ABSTRACT The bacterium Photorhabdus establishes a highly specific association with Heterorhabditis, its nematode host. Photorhabdus strains associated with Heterorhabditis bacteriophora or Heterorhabditis megidis were compared using a Photorhabdus DNA microarray. We describe 31 regions belonging to the Photorhabdus flexible gene pool. Distribution analysis of regions among the Photorhabdus genus identified loci possibly involved in nematode specificity.

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Achinelly, M. F., D. P. Eliceche, M. N. Belaich, and P. D. Ghiringhelli. "Variability study of entomopathogenic nematode populations (Heterorhabditidae) from Argentina." Brazilian Journal of Biology 77, no. 3 (2016): 569–79. http://dx.doi.org/10.1590/1519-6984.20015.

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Abstract Entomopathogenic nematodes (EPN) belonging to the Heterorhabditidae family are lethal parasites of soil-dwelling insects. Two species were reported in Argentina: Heterorhabditis argentinensis and Heterorhabditis bacteriophora characterized mainly by morphometric features. In this work a comparative and phylogenetic study between five Heterorhabditis populations from Argentina was conducted to analyze the variability between strains and to evaluate the taxonomic position of Heterorhabditis argentinensis. The PCA analyses of morphometric characters separated the larger juvenile, female

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Hu, Kaiji, Jianxiong Li, and John M. Webster. "Nematicidal metabolites produced by Photorhabdus luminescens (Enterobacteriaceae), bacterial symbiont of entomopathogenic nematodes." Nematology 1, no. 5 (1999): 457–69. http://dx.doi.org/10.1163/156854199508469.

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Abstract The secondary metabolites, 3,5-dihydroxy-4-isopropylstilbene (ST) and indole, from the culture filtrate of Photorhabdus luminescens MD, were shown to have nematicidal properties. ST caused nearly 100% mortality of J4 and adults of Aphelenchoides rhytium , Bursaphelenchus spp. and Caenorhabditis elegans at 100 mu g/ml, but had no effect on J2 of Meloidogyne incognita or infective juveniles (IJ) of Heterorhabditis megidis at 200 mu g/ml. Indole was lethal to several nematode species at 300 mu g/ml, and caused a high percentage of Bursaphelenchus spp. (J4 and adults), M. incognita (J2) a

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Dix, I., A. M. Burnell, C. T. Griffin, S. A. Joyce, M. J. Nugent, and M. J. Downes. "The identification of biological species in the genus Heterorhabditis (Nematoda: Heterorhabditidae) by cross-breeding second-generation amphimictic adults." Parasitology 104, no. 3 (1992): 509–18. http://dx.doi.org/10.1017/s0031182000063770.

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Entomopathogenic nematodes of the genus Heterorhabditis are morphologically conservative, consequently the majority of isolates remain unassigned at the species level. When a Heterorhabditis infective juvenile infects an insect host, it develops into a protandrous hermaphrodite female. These first-generation females give rise to a second generation which contains both males and females. Because of this complex life-cycle and also because of uncertainty as to whether second-generation females are amphimictic, cross-breeding studies to facilitate species determination have not been carried out p

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Giometti, Fernando Henrique Carvalho, Luís Garrigós Leite, Fernando Martins Tavares, Fábio Silber Schmit, Antonio Batista Filho, and Raphaela Dell'Acqua. "Virulência de nematóides entomopatogênicos (Nematoda: Rhabditida) a Sphenophorus levis (Coleoptera: Curculionidae)." Bragantia 70, no. 1 (2011): 81–86. http://dx.doi.org/10.1590/s0006-87052011000100013.

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O bicudo da cana-de-açúcar, Sphenophorus levis (Coleoptera: Curculionidae), é uma importante praga de solo dos canaviais no Estado de São Paulo, ocasionando prejuízos de até 30 t de cana/ha/ano. Visando ao controle biológico desta praga, esse estudo teve por objetivo avaliar a virulência de 17 isolados de nematóides entomopatogênicos do gênero Steinernema e Heterorhabditis contra adultos de S. levis, e o efeito dos quatro nematóides mais virulentos em três dosagens cada um. A pesquisa foi realizada em condições de laboratório, sendo realizados quatro ensaios para o estudo de virulência. Os nem

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Ferreira, Tiarin, Carol A. van Reenen, Akihito Endo, et al. "Photorhabdus heterorhabditis sp. nov., a symbiont of the entomopathogenic nematode Heterorhabditis zealandica." International Journal of Systematic and Evolutionary Microbiology 64, Pt_5 (2014): 1540–45. http://dx.doi.org/10.1099/ijs.0.059840-0.

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The bacterial symbionts SF41T and SF783 were isolated from populations of the insect pathogenic nematode Heterorhabditis zealandica collected in South Africa. Both strains were closely related to strain Q614 isolated from a population of Heterorhabditis sp. collected from soil in Australia in the 1980s. Sequence analysis based on a multigene approach, DNA–DNA hybridization data and phenotypic traits showed that strains SF41T, SF783 and Q614 belong to the same species of the genus Photorhabdus with Photorhabdus temperata subsp. cinerea as the most closely related taxon (DNA–DNA hybridization va

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López-Núñez, Juan Carlos, Liliana Cano, Carmenza Góngora-B., and S. Patricia Stock. "Diversity and evolutionary relationships of entomopathogenic nematodes (Steinernematidae and Heterorhabditidae) from the Central Andean region of Colombia." Nematology 9, no. 3 (2007): 333–41. http://dx.doi.org/10.1163/156854107781351972.

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Abstract A survey of entomopathogenic nematodes (EPN) was conducted in the Central Andean region of Colombia. Out of a total of 945 soil samples, 28 (3%) were positive for entomopathogenic nematodes. Of them, 26 samples (92.8%) contained Steinernema and two (7.2%) harboured Heterorhabditis isolates. Characterisation of the recovered isolates was done by analysis of rDNA sequences. The large subunit of rDNA (28S) was considered for diagnosis of Steinernema species whereas the internal transcribed spacer region (ITS) of rDNA was used to identify Heterorhabditis isolates recovered in this study.

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MORENO-SALGUERO, CARLOS ANDRÉS, ALEX ENRIQUE BUSTILLO-PARDEY, JUAN CARLOS LÓPEZ-NÚÑEZ, ULISES CASTRO-VALDERRAMA, and GERSON DARÍO RAMÍREZ-SÁNCHEZ. "Virulencia de nematodos entomopatógenos para el control del salivazo Aeneolamia varia (Hemiptera: Cercopidae) en caña de azúcar." Revista Colombiana de Entomología 38, no. 2 (2012): 260–65. http://dx.doi.org/10.25100/socolen.v38i2.9002.

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El salivazo, Aeneolamia varia (Hemiptera: Cercopidae) es una plaga limitante en cultivos de caña de azúcar en Venezuela. En Colombia esta especie se ha registrado desde hace más de 40 años en los Llanos Orientales atacando pastos. Solo en el 2007 se detectó en cultivos de caña de azúcar en el Valle del Cauca, por lo que se buscan agentes de control biológico, particularmente nematodos entomopatógenos. En este estudio se evaluó la virulencia de tres especies de nematodos entomopatógenos seleccionadas en investigaciones previas de laboratorio e invernadero; Steinernema sp.1, Heterorhabditis bact

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Devi, G., H. Mishra, B. Bhattacharyya, and D. J. Nath. "INFESTED AREAS OF MAJULI, ASSAM, INDIA." Journal of Biopesticides 9, no. 2 (2016): 148–56. http://dx.doi.org/10.57182/jbiopestic.9.2.148-156.

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Entomopathogenic nematodes (EPNs) in the genera Steinernema and Heterorhabditis and their associated bacteria such as Xenorhabdus spp. and Photorhabdus spp. are lethal parasites of soil dwelling insects. A survey was conducted to collect theentomopathogenic nematodes from Lepidiota mansueta endemic field of Majuli river island, Assam, India. During the survey, a total of 140 soil samples (1 kg each) and 80 dead grubs of L. mansueta were collected from different locations from cultivated as well as uncultivated fields of Majuli. Out of the total collection, 8 numbers of soil samples and 35 grub

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Morris, O. N., and V. Converse. "EFFECTIVENESS OF STEINERNEMATID AND HETERORHABDITID NEMATODES AGAINST NOCTUID, PYRALID, AND GEOMETRID SPECIES IN SOIL." Canadian Entomologist 123, no. 1 (1991): 55–61. http://dx.doi.org/10.4039/ent12355-1.

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AbstractLarvae of one pyralid, five noctuid, and one geometrid species were exposed to six species/strains of steinernematid and two species of heterorhabditid nematodes applied to soil surface in the laboratory. The most parasitic nematodes were Steinernema bibionis Bovien for the wax moth (Galleria mellonella L.) and the bertha armyworm (Mamestra configurata Wlk.), Heterorhabditis heliothidis (Khan, Brooks, and Hirschmann) for the cereal armyworm [Pseudaletia unipuncta (Haw)], S. feltiae Filipjev Mexican for the variegated cutworm [Peridroma saucia (Hbn.)], and S. feltiae All for the red-bac

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Grenier, E., E. Bonifassi, P. Abad, and C. Laumond. "Use of species-specific satellite DNAs as diagnostic probes in the identification of Steinernematidae and Heterorhabditidae entomopathogenic nematodes." Parasitology 113, no. 5 (1996): 483–89. http://dx.doi.org/10.1017/s0031182000081555.

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SUMMARYThree satellite DNAs previously isolated from the entomopathogenic nematodes Steinernema carpocapsae, Heterorhabditis bacteriophora and Heterorhabditis indicus give hybridization signals only with the S. carpocapsae, H. bacteriophora and H. indicus populations tested, indicating that these satellite sequences are species-specific. Because of their reiteration and their variabilities, we have shown that these sequences are able to discriminate at the interspecific level between the Steinernema and Heterorhabditis species, but also at the intraspecific level between S. carpocapsae strains

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Kovtun, A. M. "Entomonematologic studies of the agrocenoses of Ukraine as a source of identification of the factors of the potential biocontrol of plant insects." Interdepartmental Thematic Scientific Collection of Plant Protection and Quarantine, no. 62 (September 3, 2016): 133–42. http://dx.doi.org/10.36495/1606-9773.2016.62.133-142.

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Various crops and long-term plantings in Ukraine (Zhytomyr, Kiev, Chernihiv, Khmelnytskyi and Vinnytsia Regions) have been observed for the purpose of identification of the natural centers of entomopathogenic nematodes (EPN) of the genera Steinernema and Heterorhabditis (Nematoda: Rhabditida) — the natural regulators of the number of harmful insects. The reasons and conditions, determining the nature of EPN distribution have been analyzed (Steinernema, Heterorhabditis). The results of the nematologic analysis of 206 soil samples (and traps) had showed that 27 (13.1%) among them turned out to b

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Kovtun, A. M. "Entomonematologic studies of the agrocenoses of Ukraine as a source of identification of the factors of the potential biocontrol of plant insects." Interdepartmental Thematic Scientific Collection of Plant Protection and Quarantine, no. 62 (September 3, 2016): 340–49. http://dx.doi.org/10.36495/1606-9773.2016.62.340-349.

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 Various crops and long-term plantings in Ukraine (Zhytomyr, Kiev, Chernihiv, Khmelnytskyi and Vinnytsia Regions) have been observed for the purpose of identification of the natural centers of entomopathogenic nematodes (EPN) of the genera Steinernema and Heterorhabditis (Nematoda: Rhabditida) — the natural regulators of the number of harmful insects. The reasons and conditions, determining the nature of EPN distribution have been analyzed (Steinernema, Heterorhabditis). The results of the nematologic analysis of 206 soil samples (and traps) had showed that 27 (13.1%) among them turned o

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Karimi, Javad, Tahmineh Safari, and Aziz Kharazi Pakdel. "STATUS OF ENTOMOPATHOGENIC NEMATODES RESEARCHES IN IRAN." Journal of Biopesticides 03, no. 02 (2010): 474–78. http://dx.doi.org/10.57182/jbiopestic.3.2.474-478.

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ABSTRACT Entomopathogenic nematodes (EPNs) in the genera Steinernema and Heterorhabditis are excellent candidates for biological control of insect pests. Attributes making the nematodes as ideal biological include their broad host range, high virulence, safety for nontarget organisms and high efficacy in favourable habitat. Identification and characterization of EPNs in Iran was started since 2000. Several species of Steinernema and Heterorhabditis were isolated. Species from Steinernema are Steinernema carpocapsae, Steinernema feltiae, Steinernema glaseri, Steinernema monticolum and Steinerne

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Qiu, Xuehong, Richou Han, Xun Yan, et al. "Identification and Characterization of a Novel Gene Involved in the trans-Specific Nematicidal Activity of Photorhabdus luminescens LN2." Applied and Environmental Microbiology 75, no. 12 (2009): 4221–23. http://dx.doi.org/10.1128/aem.02967-08.

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ABSTRACT Photorhabdus luminescens subsp. akhurstii LN2 from Heterorhabditis indica LN2 showed nematicidal activity against axenic Heterorhabditis bacteriophora H06 infective juveniles (IJs). Transposon mutagenesis identified an LN2 mutant that supports the growth of H06 nematodes. Tn5 disrupted the namA gene, encoding a novel 364-residue protein and involving the nematicidal activity. The green fluorescent protein-labeled namA mutant was unable to colonize the intestines of H06 IJs.

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RANA, AASHA, AASHAQ HUSSAIN BHAT, ASHOK KUMAR CHAUBEY, EBRAHIM SHOKOOHI, and RICARDO A. R. MACHADO. "Morphological and molecular characterization of Heterorhabditis bacteriophora isolated from Indian soils and their biocontrol potential." Zootaxa 4878, no. 1 (2020): 77–102. http://dx.doi.org/10.11646/zootaxa.4878.1.3.

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Agricultural soils and open fields from Western Uttar Pradesh (India) were surveyed to determine the presence of entomopathogenic nematodes. From the entomopathogenic nematodes isolated, Heterorhabditis isolates were selected and further characterized using morphological, morphometrical and molecular approaches. The results showed that three isolated nematodes were Heterorhabditis bacteriophora and were associated with Photorhabdus laumondii subsp. clarkei bacteria, while the rests were identified as Heterorhabditis indica. The biocontrol potential of H. bacteriophora against three agricultura

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Vargas Linares, Antonio, Steffany Díaz Milla, and Christian Rodríguez Jimenez. "Efecto de tres concentraciones de Heterorhabditis sp. en el control de Ceratitis capitata Wiedemann en condiciones de laboratorio." Revista Científica PUNKURI 1, no. 1 (2021): 100–110. http://dx.doi.org/10.55155/punkuri.v1i1.13.

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La investigación tuvo como objetivo evaluar el efecto de tres concentraciones del nematodo entomopatógeno Heterorhabditis sp. en el control de la mosca mediterránea de la fruta (Ceratitis capitata Wiedemann) en condiciones de laboratorio. Para tal fin se evaluaron tres concentraciones Heterorhabditis sp. (T1:3000, T2:5000 y T3:7000 JIs/ ml). Se utilizó el diseño completamente al azar (DCA), empleando 4 tratamientos con 4 repeticiones, considerándose un testigo por repetición. Cada unidad experimental contuvo 15 larvas de la Ceratitis capitata Wiedemann. Se realizaron evaluaciones a los 10, 13

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Leal, Luís Carlos de Souza Rodrigues, Caio Márcio de Oliveira Monteiro, Alessandra Ésther de Mendonça, Vânia Rita Elias Pinheiro Bittencourt, and Avelino José Bittencourt. "Potential of entomopathogenic nematodes of the genus Heterorhabditis for the control of Stomoxys calcitrans (Diptera: Muscidae)." Revista Brasileira de Parasitologia Veterinária 26, no. 4 (2017): 451–56. http://dx.doi.org/10.1590/s1984-29612017065.

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Abstract The present study verified the pathogenic potential of entomopathogenic nematodes (EPNs) of the genus Heterorhabditis (Heterorhabditis bacteriophora, isolate HP88 and Heterorhabditis baujardi isolate LPP7) to immature stages of Stomoxys calcitrans in the laboratory. All EPN concentrations of the H. bacteriophora HP88 strain caused mean larval mortality greater than 90% after four days. Higher concentrations of the H. baujardi LPP7 isolate (≥50 EPNs/larva) eliminated more than 70% of larvae after six days with the concentration 200 EPNs/larva reaching mortality levels of 93.3%. The lar

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Machado, Ricardo A. R., Aashaq Hussain Bhat, Joaquín Abolafia, et al. "Multi-locus phylogenetic analyses uncover species boundaries and reveal the occurrence of two new entomopathogenic nematode species, Heterorhabditis ruandica n. sp. and Heterorhabditis zacatecana n. sp." Journal of Nematology 53, no. 1 (2021): 1–42. http://dx.doi.org/10.21307/jofnem-2021-089.

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Abstract Species of the nematode genus Heterorhabditis are important biological control agents against agricultural pests. The taxonomy of this group is still unclear as it currently relies on phylogenetic reconstructions based on a few genetic markers with little resolutive power, specially of closely related species. To fill this knowledge gap, we sequenced several phylogenetically relevant genetic loci and used them to reconstruct phylogenetic trees, to calculate sequence similarity scores, and to determine signatures of species- and population-specific genetic polymorphism. In addition, we

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Chaerani, Chaerani, Y. Suryadi, T. P. Priyatno, et al. "ISOLASI NEMATODA PATOGEN SERANGGA STEINERNEMA DAN HETERORHABDITIS." Jurnal Hama dan Penyakit Tumbuhan Tropika 7, no. 1 (2007): 1–9. http://dx.doi.org/10.23960/j.hptt.171-9.

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Isolation of Entomopathogenic Nematodes Steinernema and Heterorhabditis. Entomopathogenic nematodes from the genus Steinernema and Heterorhabditis (Rhabditida: Steinernematidae and Heterorhabditidae) are promising biological control agent of insect pests. Indigenous nematodes have been isolated and collected for the use in local biological control program of important insect pests. The nematodes were isolated using soil baiting method with insect larvae. Laboratory tests have shown that the mealworm larvae Tenebrio molitor (Coleoptera: Tenebrionidae) served as a good alternative to the standar

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Baimey, Hugues, Lionel Zadji, Leonard Afouda, Maurice Moens, and Wilfrida Decraemer. "Influence of pesticides, soil temperature and moisture on entomopathogenic nematodes from southern Benin and control of underground termite nest populations." Nematology 17, no. 9 (2015): 1057–69. http://dx.doi.org/10.1163/15685411-00002923.

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The influence of three pesticides on the viability and infectivity of four Beninese isolates of entomopathogenic nematodes (EPN), Heterorhabditis indica Ayogbe1, H. sonorensis Azohoue2, H. sonorensis Ze3, and Steinernema sp. Bembereke, was determined. The impact of both soil temperature and soil moisture on the virulence of these EPN to Trinervitermes occidentalis was investigated in laboratory assays. The effect of EPN-infected Galleria mellonella larvae on underground populations of Macrotermes bellicosus was also examined. All tested Heterorhabditis species were more tolerant to glyphosate

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Abate, Birhan A., Bernard Slippers, Michael J. Wingfield, Antoinette P. Malan, and Brett P. Hurley. "Diversity of entomopathogenic nematodes and their symbiotic bacteria in south African plantations and indigenous forests." Nematology 20, no. 4 (2018): 355–71. http://dx.doi.org/10.1163/15685411-00003144.

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Summary The occurrence and diversity of entomopathogenic nematodes (EPN) and their symbiotic bacteria was evaluated in commercial forestry plantations (Eucalyptus spp., Pinus spp. and Acacia mearnsii) and indigenous forests in South Africa. EPN were most prevalent in A. mearnsii plantations, accounting for 60.7% of the isolates, while indigenous forests, plantations of Pinus spp. and Eucalyptus spp. accounted for 35.7, 3.6 and 0% of the isolates, respectively. DNA sequences of the internal transcribed spacer (ITS) and D2-D3 28S rDNA regions were used to identify the nematode species. Four Stei

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Susurluk, Alper, Urs Wyss, Ralf-Udo Ehlers, Olaf Strauch, Erko Stackebrandt, and Ilona Dix. "Identification and ecological characterisation of three entomopathogenic nematode-bacterium complexes from Turkey." Nematology 3, no. 8 (2001): 833–41. http://dx.doi.org/10.1163/156854101753625326.

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AbstractTwo heterorhabditid nematode strains (TUR-H1 and TUR-H2), and their bacterial symbionts isolated from soil samples taken at the campus of the Agriculture Faculty of the University of Ankara, Turkey, were identified by molecular methods and by cross-breeding with Heterorhabditis bacteriophora. The bacterial symbionts shared >99% similarity in the 16S rDNA sequence with Photorhabdus luminescens subsp. laumondii. Results of the restriction fragment length analysis of the ITS region assigned both nematode strains to the species H. bacteriophora. Cross-breeding confirmed the species desi

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Menti, Hara, Mavji Patel, Denis Wright, and Roland Perry. "Lipid utilisation during storage of the entomopathogenic nematodes Steinernema feltiae and Heterorhabditis megidis from Greece and the UK." Nematology 5, no. 1 (2003): 31–37. http://dx.doi.org/10.1163/156854102765216669.

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Abstract The total lipid (TL) content and the fatty acid composition of the different lipid classes in infective juveniles of Steinernema feltiae and Heterorhabditis megidis isolates from Greece (GR) and from the United Kingdom (UK) were compared, and the changes during storage were determined. Steinernema feltiae GR had a greater amount of TL than S. feltiae UK, which was reflected in a greater neutral lipid (NL) content. The phospholipid and free fatty acid fractions of the two Steinernema populations were similar. The two Heterorhabditis populations did not differ in their lipid content. In

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Sigareva, D. D., А. М. Kovtun, and V. V. Kornyushin. "Occurrence of Entomopathogenic Nematodes (Rhabditida: Steienernematidae, Heterorhabditidae) from Agricultural Ecosystems in Forest (Polissya) and Forest-Steppe Natural Zones of Ukraine." Vestnik Zoologii 53, no. 4 (2019): 285–96. http://dx.doi.org/10.2478/vzoo-2019-0028.

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Abstract A survey for entomopathogenic nematodes (EPNs) of the Steienernematidae and Heterorhabditidae in soils of different crop types of agricultural lands (household plots, commercial fields) in the forest (Polissya) and forest-steppe (Lisostep) zones of Ukraine was carried out in spring, summer and autumn months from 2016 to 2018. In total, 205 soil samples and 92 live-traps were processed. In addition, 98 samples of soil-living larvae and adults of insect crop pests, including cockchafer beetles, click beetle larvae, darkling beetle larvae, caterpillars of the scoops were collected. It is

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Batista, E. S. de P., A. M. Auad, M. P. Frias, and C. M. de O. Monteiro. "NEMATOIDES ENTOMOPATOGÊNICOS INFECTAM OVOS E ADULTOS CIGARRINHA-DAS-PASTAGENS?" Arquivos do Instituto Biológico 78, no. 3 (2011): 475–78. http://dx.doi.org/10.1590/1808-1657v78p4752011.

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RESUMO Nematoides entomopatogênicos (NEPs) são potenciais controladores biológicos das ninfas de cigarrinhas-das-pastagens. Com o objetivo de avaliar a eficiência dos NEPs contra as demais fases de vida (ovos e adultos) de Mahanarva spectabilis, desenvolveu-se experimento sob condições de laboratório. Ovos em diferentes fases de desenvolvimento embrionário foram expostos aos NEPs Steinernema anomali. S. carpocapsae. S. feltiae. S. riobrave. Heterorhabditis amazonensis RSC1, H. amazonensis RSC5, Heterorhabditis sp. JPM3, Heterorhabditis indica LPP1 e Heterorhabditis sp. PI no volume de 2 mL com

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Parada Domínguez, Oscar, Raquel Alatorre Rosas, Ariel Wilbert Guzmán Franco, Francisco Hernández Rosas, Luz Irene Rojas Avelizapa, and Víctor Manuel Ruíz Vera. "Efecto de nematodos entomopatógenos en ninfas de Aeneolamia albofasciata y su persistencia en suelos cañeros de Veracruz." Revista Mexicana de Ciencias Agrícolas, no. 22 (April 3, 2019): 115–27. http://dx.doi.org/10.29312/remexca.v0i22.1863.

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El objetivo de este estudio fue evaluar la patogenicidad de los nematodos, Heterorhabditis sp. (CPVG13) y Steinernema spp. (CPVC12, CPVC13) sobre el salivazo, Aeneolamia albofasciata y determinar su persistencia en el suelo de tres ingenios azucareros Potrero, Constancia y Motzorongo, del estado de Veracruz. En el primer experimento la patogenicidad de los nematodos entomopatógenos se evaluó en ninfas de mosca pinta, A. albofasciata de 3° y 4° instar, se aplicaron 120 (juveniles infectivos) JI/ninfa sobre cajas con seis cavidades, cubiertas previamente con papel filtro, cada cavidad contenía u

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ANDALÓ, VANESSA, ALCIDES MOINO JR, CLEBER MAXIMINIANO, VICENTE P. CAMPOS, and LÚCIA A. MENDONÇA. "Influence of temperature and duration of storage on the lipid reserves of entomopathogenic nematodes." Revista Colombiana de Entomología 37, no. 2 (2011): 203–9. http://dx.doi.org/10.25100/socolen.v37i2.9075.

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Lipids represent the main source of energy in entomopathogenic nematodes. In the infective juvenile (IJ) phase, the level of such reserves can be influenced by storage, and this may affect their infectivity. The aim of this study was to evaluate the percentage of lipids and the associated infectivity in IJs of Steinernema carpocapsae, S. riobrave, Heterorhabditis sp. JPM4, Heterorhabditis sp. CCA and Heterorhabditis sp. PI that had been stored under different temperatures (8-28°C) for various times (0 to 180 days). The amounts of lipids present in IJs were evaluated histologically using a colo

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WIRATNO, WIRATNO, and ROHIMATUN ROHIMATUN. "PATOGENISITAS NEMATODA Heterorhabditis sp. TERHADAP KUMBANG DAUN KELAPA Brontispa longissima GESTRO." Jurnal Penelitian Tanaman Industri 18, no. 4 (2020): 137. http://dx.doi.org/10.21082/jlittri.v18n4.2012.137-142.

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<p>ABSTRAK<br />Suatu bioassay telah dilakukan di Balai Penelitian Tanaman<br />Rempah dan Obat Bogor, dari bulan November 2010 sampai dengan Maret<br />2011, yang bertujuan untuk mengetahui potensi Heterorhabditis sp. dalam<br />mengendalikan Brontispa longissima. Nematoda dipanen dengan cara<br />meletakkan larva Tenebrio molitor mati terinfeksi nematoda patogen<br />serangga (NPS) di atas kertas saring yang diletakkan di dalam cawan petri<br />berisi 30 ml air. Juvenil infektif (JI) yang ada di dalam tubuh larva akan<br />keluar dan hidu

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Libardoni, Gabriela, Raiza Abati, Amanda Roberta Sampaio, et al. "Impact of entomopathogenic nematodes on Africanized honey bees Apis mellifera L. (Hymenoptera: Apidae) workers." Semina: Ciências Agrárias 41, no. 6supl2 (2020): 3441–48. http://dx.doi.org/10.5433/1679-0359.2020v41n6supl2p3441.

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Africanized honey bee populations (Apis mellifera L.) have been decreasing mainly due to the intense use of synthetic insecticides associated with pollution and climate change. To minimize these impacts on the environment and bee populations, the use of biological control agents has been intensified. These products are generally safer for non-target insects, such as bees, which are important pollinating insects. Thus, the objective of this study was to evaluate the impact of entomopathogenic nematodes on the longevity of the Africanized honey bee A. mellifera workers. Seven treatments were use

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Sturhan, Dieter, and Marta Liskova. "Occurrence and distribution of entomopathogenic nematodes in the Slovak Republic." Nematology 1, no. 3 (1999): 273–77. http://dx.doi.org/10.1163/156854199508261.

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AbstractInfective-stage juveniles of entomopathogenic nematodes of the genera Steinernema and Heterorhabditis were recovered by direct extraction from 36% of a total of 111 soil samples collected in various biotopes from different regions of Slovakia. The rate of prevalence was highest in forest soil (58%). On the basis of morphological characters of the infective juveniles eight Steinernema and one Heterorhabditis species were distinguished. Steinernema affine, S. intermedium and S. feltiae were most prevalent (together 74% of all records). The other species of Steinernema encountered were S.

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Johnigk, Stefan-Andreas, and Ralf-Udo Ehlers. "Endotokia matricida in hermaphrodites of Heterorhabditis spp. and the effect of the food supply." Nematology 1, no. 7 (1999): 717–26. http://dx.doi.org/10.1163/156854199508748.

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AbstractIntra-uterine birth causing maternal death (endotokia matricida) is relatively common in rhabditid nematodes and typical for entomopathogenic nematodes of the genus Heterorhabditis. A detailed description of this phenomenon is given, including a summary of embryo development, egg-laying, juvenile hatching and development. It is demonstrated that low food supply significantly promotes the beginning of endotokia matricida but has no influence on the time scale of the process. The biological function of endotokia matricida and the intra-uterine induction of the dauer formation is discusse

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Rutherford, T. A., D. Trotter, and J. M. Webster. "THE POTENTIAL OF HETERORHABDITID NEMATODES AS CONTROL AGENTS OF ROOT WEEVILS." Canadian Entomologist 119, no. 1 (1987): 67–73. http://dx.doi.org/10.4039/ent11967-1.

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AbstractGreenhouse and field trials were done to determine the potential of Heterorhabditis heliothidis (Khan, Brooks and Hirschmann) Poinar (NC19 strain), an undescribed Heterorhabditis sp. (NC447 strain), and Steinernema feltiae Filipjev (A32−6 strain) to control British Columbia populations of black vine weevil (Otiorhyncus sulcatus Fab.) and strawberry root weevil (O. ovatus L.). An outdoor application of H. heliothidis applied at rates of 500 and 5000 nematodes per litre of soil gave significantly better control of black vine weevil larvae on potted, lodgepole pine trees (Pinus contorta D

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