0393 Effect of entomopathogenic nematodes on soil arthropod diversity in pistachio orchards

Monday, November 17, 2008: 8:59 AM
Room A9, First Floor (Reno-Sparks Convention Center)
Amanda K. Hodson , Entomology, University of Califonia-Davis, Davis, CA
Edwin E. Lewis , Department of Entomology, University of California, Davis, CA
Joel Siegel , USDA - ARS, Parlier, CA
Pistachio growers apply entomopathogenic nematodes of the species Steinernema carpocapsae to control overwintering navel orangeworm, Amyelois transitella. Applied at a rate of 25/cm2 under trees, these nematodes represent a large resource subsidy into the soil ecosystem. We hypothesize that such a subsidy will alter local soil faunal diversity. Entomopathogenic nematodes may negatively affect soil fauna through direct parasitism or their bacteria may produce toxic or repellent chemicals. Additionally, nematophagous mites and collembolans may respond positively to the subsidy. In this study, we compared invertebrate diversity under 35 treated and 35 control trees one week after entomopathogenic nematode application.

doi: 10.1603/ICE.2016.37546