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pubmed-article:21047513pubmed:dateCreated2011-1-24lld:pubmed
pubmed-article:21047513pubmed:abstractTextWe examined the influence of insect cadaver desiccation on the virulence and production of entomopathogenic nematodes (EPNs), common natural enemies of many soil-dwelling insects. EPNs are often used in biological control, and we investigated the feasibility of applying EPNs within desiccated insect cadavers. Desiccation studies were conducted using the factitious host, Galleria mellonella (Lepidoptera: Pyralidae, wax moth larvae) and three EPN species (Heterorhabditis bacteriophora 'HB1', Steinernema carpocapsae 'All', and Steinernema riobrave). Weights of individual insect cadavers were tracked daily during the desiccation process, and cohorts were placed into emergence traps when average mass losses reached 50%, 60%, and 70% levels. We tracked the proportion of insect cadavers producing infective juveniles (IJs), the number and virulence of IJs produced from desiccated insect cadavers, and the influence of soil water potentials on IJ production of desiccated insect cadavers. We observed apparent differences in the desiccation rate of the insect cadavers among the three species, as well as apparent differences among the three species in both the proportion of insect cadavers producing IJs and IJ production per insect cadaver. Exposure of desiccated insect cadavers to water potentials greater than -2.75 kPa stimulated IJ emergence. Among the nematode species examined, H. bacteriophora exhibited lower proportions of desiccated insect cadavers producing IJs than the other two species. Desiccation significantly reduced the number of IJs produced from insect cadavers. At the 60% mass loss level, however, desiccated insect cadavers from each of the three species successfully produced IJs when exposed to moist sand, suggesting that insect cadaver desiccation may be a useful approach for biological control of soil insect pests.lld:pubmed
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pubmed-article:21047513pubmed:authorpubmed-author:KayaH KHKlld:pubmed
pubmed-article:21047513pubmed:authorpubmed-author:StevensG NGNlld:pubmed
pubmed-article:21047513pubmed:authorpubmed-author:ArimotoHHlld:pubmed
pubmed-article:21047513pubmed:authorpubmed-author:LewisE EEElld:pubmed
pubmed-article:21047513pubmed:authorpubmed-author:SpenceK OKOlld:pubmed
pubmed-article:21047513pubmed:authorpubmed-author:Ruiz-VegaJJlld:pubmed
pubmed-article:21047513pubmed:copyrightInfoCopyright © 2010 Elsevier Inc. All rights reserved.lld:pubmed
pubmed-article:21047513pubmed:issnTypeElectroniclld:pubmed
pubmed-article:21047513pubmed:volume106lld:pubmed
pubmed-article:21047513pubmed:ownerNLMlld:pubmed
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pubmed-article:21047513pubmed:pagination268-73lld:pubmed
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pubmed-article:21047513pubmed:year2011lld:pubmed
pubmed-article:21047513pubmed:articleTitleEffect of insect cadaver desiccation and soil water potential during rehydration on entomopathogenic nematode (Rhabditida: Steinernematidae and Heterorhabditidae) production and virulence.lld:pubmed
pubmed-article:21047513pubmed:affiliationDepartment of Nematology, University of California, Davis, CA 95616, USA. kospence@ucdavis.edulld:pubmed
pubmed-article:21047513pubmed:publicationTypeJournal Articlelld:pubmed
pubmed-article:21047513pubmed:publicationTypeResearch Support, U.S. Gov't, Non-P.H.S.lld:pubmed
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