Dispersal of<i>Heterorhabditis baujardi</i>LPP7 (Nematoda: Rhabditida) applied to the soil as infected host cadavers

Valle, Eleodoro E. Del; Dolinski, Cláudia; Souza, Ricardo Moreira

doi:10.1080/09670870701660579

Cited by 18 publications

(17 citation statements)

References 33 publications

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“…Thus, although soil represents a relatively stable environment, IJs may experience stress conditions such as desiccation and high temperatures, especially in the soil surface, while in flooded soils they may experience lack of oxygen and influence of diseases and antagonistic organisms (Griffin et al, 2005). Del Valle et al (2008a) verified the dispersion of H. baujardi LPP7 was delayed (fifth week after liberation) by the adverse conditions of temperature and soil moisture, when applying infected cadavers of G. mellonella. Besides these factors, time of exposure of A. fraterculus pupae to IJs that emerged from cadavers in this study was 6 days, lower than that observed by Del Valle et al (2008b), thus this may have negatively affected the efficacy of both nematode species.…”

Section: Efficacy Of Two Inoculation Techniques Of S Riobrave and Hmentioning

confidence: 96%

Efficacy of indigenous entomopathogenic nematodes (Rhabditida: Heterorhabditidae, Steinernematidae), from Rio Grande do Sul Brazil, against Anastrepha fraterculus (Wied.) (Diptera: Tephritidae) in peach orchards

Barbosa-Negrisoli

Garcia

Dolinski

et al. 2009

Journal of Invertebrate Pathology

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Laboratory, greenhouse, and field experiments were performed with the objective of selecting efficient indigenous strains of entomopathogenic nematodes (EPNs) from Rio Grande do Sul (RS) state, Brazil, for controlling the South American fruit fly, Anastrepha fraterculus (Wied.). Laboratory experiments were conducted in 24 well-plates filled with sterile sand and one insect per well. In greenhouse experiments, plastic trays filled with soil collected from the field were used, while in field experiments, holes were made in soil under the edge of peach tree canopies. Among 19 EPN strains tested, Heterorhabditis bacteriophora Poinar RS88 and Steinernema riobrave Cabanillas, Poinar, & Raulston RS59 resulted in higher A. fraterculus larval (pre-pupal) and pupal mortality, with LD(90) of 1630, 457 and 2851, 423 infective juveniles (IJs)/cm(2), respectively. Greenhouse experiments showed no differences in pupal mortality at 250 and 500IJs/cm(2) of either nematode. In the field, H. bacteriophora RS88 and S. riobravae RS59 sprayed individually over natural and artificially infested fruit (250IJs/cm(2)) resulted in A. fraterculus larval mortality of 51.3%, 28.1% and 20%, 24.3%, respectively. There was no significant difference in A. fraterculus pupal mortality sprayed with an aqueous suspension of either nematode; however, when using infected insect cadavers, H. bacteriophora RS88 was more efficient than S. riobrave RS59. Our results showed that H. bacteriophora RS88 was more virulent to insect larvae, with an efficient host search inside the infested fruit and control of pupae in the soil after being applied by aqueous suspension or infected cadavers.

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Section: Efficacy Of Two Inoculation Techniques Of S Riobrave and Hmentioning

confidence: 96%

Efficacy of indigenous entomopathogenic nematodes (Rhabditida: Heterorhabditidae, Steinernematidae), from Rio Grande do Sul Brazil, against Anastrepha fraterculus (Wied.) (Diptera: Tephritidae) in peach orchards

Barbosa-Negrisoli

Garcia

Dolinski

et al. 2009

Journal of Invertebrate Pathology

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“…Many species of EPNs belonging to both genera have been used with variable success as biocontrol agents against a number of insect pests occupying different habitats. However, considerable success has been achieved against soil-dwelling pests or pests in cryptic habitats (Begley 1990;Klein 1990;Williams and Walters 1999;Tomalak et al 2005;Valle et al 2008). Therefore, many studies have highlighted the usefulness of EPNs as suitable biological control agents against soil-dwelling pests (Hominick and Reid 1990).…”

Section: Introductionmentioning

confidence: 98%

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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“…The present results showed that IJs moved up to a distance of 20 cm from the infected cadaver, potentially covering a circular area of 1256 cm 2 around the cadaver. Recently, De Valle et al 20 also showed movement of IJs up to 90 cm from the cadaver application point. Together with the present findings, this information could be used in field experiments to calculate the number of infected cadavers needed for control.…”

Section: Discussionmentioning

confidence: 96%

Formulation and application of entomopathogenic nematode‐infected cadavers for control of Hoplia philanthus in turfgrass

Ansari

Hussain

Moens

2009

Pest Management Science

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Dispersal ofHeterorhabditis baujardiLPP7 (Nematoda: Rhabditida) applied to the soil as infected host cadavers

Cited by 18 publications

References 33 publications

Efficacy of indigenous entomopathogenic nematodes (Rhabditida: Heterorhabditidae, Steinernematidae), from Rio Grande do Sul Brazil, against Anastrepha fraterculus (Wied.) (Diptera: Tephritidae) in peach orchards

Efficacy of indigenous entomopathogenic nematodes (Rhabditida: Heterorhabditidae, Steinernematidae), from Rio Grande do Sul Brazil, against Anastrepha fraterculus (Wied.) (Diptera: Tephritidae) in peach orchards

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

Formulation and application of entomopathogenic nematode‐infected cadavers for control of Hoplia philanthus in turfgrass

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