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Potential of entomopathogenic nematodes for biological control of Acalymma vittatum (Coleoptera: Chrysomelidae) in cucumbers grown in conventional and organic soil management systems

Authors:

Ellers-Kirk, C.D.; Fleischer, S.J.; Snyder, R.H.; Lynch, J.P.

Source:

Journal of Economic Entomology, Entomological Society of America, Volume 93, Issue 3, USA, p.605-612 (2000)

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Abstract:

A study was conducted to determine how soil management affects viability and infectivity of an entomopathogenic nematode that may be used for the control of A. vittatum . Dose-mortality curves under laboratory conditions suggested several Steinernema spp. as potential biocontrol agents. Field injections combined with soil bioassays, conducted during 1995 and 1996 in Penssylvania, USA, showed that Steinernema riobravis [ Steinernema riobrave ] longevity exceeded A. vittatum immature development time in both conventional and organic soil management systems. Mean root length densities of cucumbers increased in both soil management systems with the inclusion of nematodes. Soil management alone also influenced A. vittatum larval survival, with higher survival rates in the organic compared with the conventional soil management system. A 50% reduction in A. vittatum larval survival rates in both soil management systems, as determined by adult A. vittatum emergence, demonstrated the potential of incorporation of entomopathogenic nematodes for integrated pest management of diabroticites in commercial cucumber production.