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The National Agricultural Library is one of four national libraries of the United States, with locations in Beltsville, Maryland and Washington, D.C. It houses one of the world's largest and most accessible agricultural information collections and serves as the nexus for a national network of state land-grant and U.S. Department of Agriculture field libraries. In fiscal year 2011 (Oct 2010 through Sept 2011) NAL delivered more than 100 million direct customer service transactions.

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Journal Article

Article de revue

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
(Revue
Journal of invertebrate pathology (USA)
ISSN : 0022-2011

Information bibliographique

Langue:
English
Type:
Journal Article
Sur AGRIS depuis:
1998
Volume:
70
Numéro:
3
Page initiale:
234
Page finale:
242
Tous les titres:
"Potential for the control of Plutella xylostella larvae with entomopathogenic nematodes"@eng
Autre:
"ref."
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Information bibliographique

Langue:
English
Type:
Journal Article
Sur AGRIS depuis:
1998
Volume:
70
Numéro:
3
Page initiale:
234
Page finale:
242
Tous les titres:
"Potential for the control of Plutella xylostella larvae with entomopathogenic nematodes"@eng
Autre:
"ref."