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Journal Article

Artículo de revista

Potential for the control of Plutella xylostella larvae with entomopathogenic nematodes  [1997]

Mason, J.M.; Wright, D.J.;

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Entomopathogenic nematodes (EPNs), isolated in Malaysia, were screened against larvae of the diamondback moth (DBM), Plutella xylostella, to assess their potential as biocontrol agents. A number of isolates were chosen for further study. Use of EPNs against foliage pests is commonly perceived to be limited by their temperature range and ability to survive desiccation and UV radiation. The effects of these abiotic factors on the infective juveniles (ijs) of two isolates of Steinernema spp. (SSL85), two isolates of Steinernema spp. (M87), Heterorhabditis n.sp., and Heterorhabditis indicus were examined. Infectivity at different temperatures was found to differ both within and between species, with optimal infection at 20-25 degrees C. Desiccation studies revealed more marked, although not statistically significant, differences between the isolates. For example, at 80% relative humidity, survival of approximately 51% of ijs of Steinernema spp. (SSL85/25) was observed, compared with 13% for Steinernema spp. (M87/45). Prior exposure of ijs suspended in water droplets to simulated solar radiation resulted in relatively constant DBM mortality in subsequent bioassays and, generally, no marked reduction in mean infection. These laboratory-based studies are encouraging as they suggest that entomopathogenic nematodes can tolerate, within defined limits, the major abiotic factors faced in the foliar environment. Infection of DBM larvae was shown to have commenced with
in 3 hr postexposure, resulting in significant levels of mortality although maximal infection did not occur until at least 24 hr postexposure. Dose-response studies showed that between 1 and 18% of the initial dose of ijs infected DBM larvae
Publicación
Journal of invertebrate pathology (USA)
ISSN : 0022-2011

Información bibliográfica

Idioma:
English
Tipo:
Journal Article
En AGRIS desde:
1998
Volumen:
70
Edición:
3
Página inicial:
234
Página final:
242
Todos los títulos:
"Potential for the control of Plutella xylostella larvae with entomopathogenic nematodes"@eng
Otro:
"ref."
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Información bibliográfica

Idioma:
English
Tipo:
Journal Article
En AGRIS desde:
1998
Volumen:
70
Edición:
3
Página inicial:
234
Página final:
242
Todos los títulos:
"Potential for the control of Plutella xylostella larvae with entomopathogenic nematodes"@eng
Otro:
"ref."