Activity and Persistence of Entomoparasitic Nematodes Tested Against Heliothis armigera (Lepidoptera: Noctuidae)

Glazer, I.; Navon, A.

doi:10.1093/jee/83.5.1795

Cited by 85 publications

(42 citation statements)

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“…For example, Hominick and Reid (1990) reported that, besides the intrinsic qualities of the species, EPN efficiency is greatly influenced by its dose. In a similar manner, researchers have also recorded a positive relationship between nematode concentration and host mortality in many previous studies (Forschler and Nordin 1988;Glazer and Navon 1990;Peters and Ehlers 1994). The present findings on virulence of S. glaseri are in tune with Toepfer et al (2005), who also reported this species to be the most virulent one among all the studied EPNs against western corn rootworm, Diabrotica virgifera virgifera.…”

Section: Resultssupporting

confidence: 88%

Efficacy of indigenous entomopathogenic nematodes from Meghalaya, India against the larvae of taro leaf beetle, Aplosonyx chalybaeus (Hope)

Yadav

Lalramliana

2012

J Parasit Dis

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The efficacy of three entomopathogenic nematode (EPN) species, Heterorhabditis indica, Steinernema thermophilum, and S. glaseri, from Meghalaya, India was studied against the larvae of taro leaf beetle, Aplosonyx chalybaeus (Hope) (Coleoptera: Chrysomelidae), under the laboratory conditions. The beetle larvae (grubs) were exposed to 25, 50, 75, 100 and 200 infective juveniles (IJs) of each nematode species for different time periods and they were found to be susceptible to all the EPNs tested. However, the susceptibility of grubs to nematode infection varied according to the dosages of IJs and their exposure periods. Appreciably good performance was achieved by S. glaseri, which showed 100 % mortality of insect larvae in 48 h exposure time. At 48 h of incubation, its LC50 value was 90.3 IJs/larva, which was lower than that of S. thermophilum (115.0 IJs/larva) and H. indica (186.0 IJs/larva), at the same exposure time. All the tested nematode species were also found to reproduce within the host and produced infective juveniles. H. indica, however, showed comparatively more production of IJs per cadaver of infected host (168.9 × 10(3) IJs/larva), as compared to the other two tested nematode species. The production of IJs per cadaver of infected host by S. thermophilum was recorded to be 82.0 × 10(3) IJs/larva. In case of S. glaseri, while production of IJs increased initially to 18.9 × 10(3) IJs/larva at concentration of 100 IJs/larva, it declined thereafter to 14.7 × 10(3) IJs/larva at the dose of 200 IJs/larva. In conclusion, the evidence obtained in this study suggests that all the three indigenous EPN species are virulent enough to produce 100 % mortality in the last instar larvae of A. chalybaeus. These EPN species thus have potential scope for the management of A. chalybaeus in taro crops.

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Section: Resultssupporting

confidence: 88%

Efficacy of indigenous entomopathogenic nematodes from Meghalaya, India against the larvae of taro leaf beetle, Aplosonyx chalybaeus (Hope)

Yadav

Lalramliana

2012

J Parasit Dis

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“…In the present study, the infested plants were sprayed with two concentrations of nematodes; the higher concentration killed the greatest number of larvae. Indeed, larval death of S. cretica gradually increased and was significantly higher after two weeks than one week, as also reported by Glazer and Navon (1990). The second planting date was the one most suitable date for planting corn as the infestation by S. cretica was the lowest and EPN resulted in a high mortality of S. cretica in these plots.…”

Section: Discussionsupporting

confidence: 81%

Field performance of entomopathogenic nematodes and an egg parasitoid for suppression of corn borers in Egypt

El-Wakeil

Hussein

2009

Archives Of Phytopathology And Plant Protection

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Two entomopathogenic nematodes (EPNs) and an egg parasitoid for controlling three corn borers (Sesamia cretica, Chilo agamemnon and Ostrinia nubilalis) in corn fields. EPNs, Heterorhabditis bacteriophora (BA1) and Steinernema carpocapsae (BA2) were applied to the control S. cretica (after 40 d post planting) on different planting dates. Three releases of Trichogramma evanescens were also conducted at two-week intervals to control C. agamemnon and O. nubilalis starting at tasseling time for the three planting dates; two release levels were used [20 & 30 cards (1000 parasitized eggs/ card)/acre].During the first planting period, the spraying of EPN resulted in a 97% and 100% mortality of S. cretica larvae with H. bacteriophora (BA1) and S. carpocapsae (BA2) respectively, one week post spraying. After two weeks there was a 100% mortality of S. cretica on both EPN species. During the second planting period, the infestation by S. cretica was low, suggesting that this might be a suitable time for planting corn. There were a relatively high number of C. agamemnon and O. nubilalis eggs laid during the third planting period compared to first and second. The parasitism percentages by Trichogramma were high on all planting dates using the 30 cards/acre level compared to the second 20 cards/acre level. At season's end, the numbers of C. agamemnon and O. nubilalis larvae were significantly reduced on the Trichogramma release plots compared to on the control plots. The overall reduction in corn borer larvae on the treated plots using EPNs and later Trichogramma resulted in an increased yield compared to on the control plots. The results suggest that EPN and Trichogramma together can play a crucial role to control the three corn borers.

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“…In the study carried out by Marannino et al (2003), strains of H. bacteriophora and S. carpocapsae caused nearly 100% mortality of neonate larvae. Even though studies with other insects reported that first stages larvae are more susceptible than later stages (Glazer & Navon, 1990;Shapiro et al, 1999;Woon Lee et al, 2002;Grewal et al, 2004) and vice versa (Gaugler & Molloy, 1981;Fujiie et al, 1993;Smits et al, 1994), the results of this bioassay and other studies (García-del-Pino, 1994;Marannino et al, 2003;García-del-Pino & Morton, 2005) demonstrate that there are no differences in susceptibility among stages of C. tenebrionis larvae. The results obtained in this study with last instar larvae permit the rejection of S. feltiae isolates T92, L9, L11 and L12 because of their poor virulence.…”

Section: Discussioncontrasting

confidence: 42%

Virulence of entomopathogenic nematodes to different stages of the flatheaded root borer, Capnodis tenebrionis (L.) (Coleoptera: Buprestidae)

Morton

Pino

2009

Nematol

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The virulence of 14 Steinernema feltiae isolates, one S. carpocapsae and three Heterorhabditis bacteriophora isolates was compared in the laboratory against larvae, pupae and adults of the flatheaded root borer, Capnodis tenebrionis. Larval mortality ranged from 50 to 100% and pupae mortality from 0 to 70%. Adults were exposed to different nematode concentrations, 50 and 100 infective juveniles/cm 2 . Steinernema feltiae caused the highest mortality at the two doses tested, reaching 66.7% and 100%, respectively. Significant differences in mortality between C. tenebrionis males and females were observed. The differences in virulence observed at each stage of C. tenebrionis vary within a species and can be higher than differences among species. The results of this study suggest that some of the isolate strains have potential for improved biological control of C. tenebrionis.

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Activity and Persistence of Entomoparasitic Nematodes Tested Against Heliothis armigera (Lepidoptera: Noctuidae)

Cited by 85 publications

References 0 publications

Efficacy of indigenous entomopathogenic nematodes from Meghalaya, India against the larvae of taro leaf beetle, Aplosonyx chalybaeus (Hope)

Efficacy of indigenous entomopathogenic nematodes from Meghalaya, India against the larvae of taro leaf beetle, Aplosonyx chalybaeus (Hope)

Field performance of entomopathogenic nematodes and an egg parasitoid for suppression of corn borers in Egypt

Virulence of entomopathogenic nematodes to different stages of the flatheaded root borer, Capnodis tenebrionis (L.) (Coleoptera: Buprestidae)

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