Full TGIF Record # 86276
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Web URL(s):http://www.bioone.org/bioone/?request=get-document&issn=0046-225X&volume=032&issue=01&page=0080
    Last checked: 11/2005
    Access conditions: Item is within a limited-access website
Publication Type:
i
Refereed
Author(s):Grant, Jennifer A.; Villani, Michael G.
Author Affiliation:Department of Entomology, Cornell University, NYSAES, Geneva, New York
Title:Soil moisture effects on entomopathogenic nematodes
Section:Population ecology
Other records with the "Population ecology" Section
Source:Environmental Entomology. Vol. 32, No. 1, February 2003, p. 80-87.
# of Pages:8
Publishing Information:College Park, MD: Entomological Society of America
Keywords:TIC Keywords: Entomopathogenic nematodes; Soil moisture; Heterorhabditis bacteriophora; Virulence; Steinernema glaseri; Steinernema feltiae; Steinernema carpocapsae; Precipitation; Irrigation
Abstract/Contents:"The effect of soil moisture on entomopathogenic nematode virulence was examined in the laboratory. Objectives were to determine the virulence of several species and isolates of entomopathogenic nematodes at various soil moisture contents and temperatures, and after fluctuations in soil moisture. Studies included up to five isolates of entomopathogenic nematodes: Heterorhabditis bacteriophora Poinar (Oswego and Tuscarora strains), Steinernema glaseri (Steiner) (NC1 strain), Nematodes were applied to sandy loam soils ranging in soil moisture content from below the permanent wilting point of plants to near saturation. In all experiments, a rainfall or irrigation event was simulated by adding water to rehydrate soils to high moisture levels (near saturation). Nematode virulence was evaluated periodically by measuring insect mortality in Galleria mellonella (L.) larval bioassays, before and after rehydration. Nematode virulence increased with soil moisture content for all species and isolates tested. Our studies demonstrated that the virulence of entomopathogenic nematodes in low moisture conditions could be restored by rehydrating the soil. Insect mortality was generally low in low-moisture, nematode-infested soils before rehydration, but increased to high levels posthydration. Moisture effects were evident from the onset of each experiment, whereas the effect of soil temperature on nematode-induced insect mortality was delayed and nonsignificant until 14 wk after the initiation of the third experiment."
Language:English
References:44
Note:Graphs
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Grant, J. A., and M. G. Villani. 2003. Soil moisture effects on entomopathogenic nematodes. Environ. Entomol. 32(1):p. 80-87.
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Web URL(s):
http://www.bioone.org/bioone/?request=get-document&issn=0046-225X&volume=032&issue=01&page=0080
    Last checked: 11/2005
    Access conditions: Item is within a limited-access website
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MSU catalog number: SB 599 .E44
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