Environmental Entomology (1984) 13, 902-906

R.V. Flanders, L.W. Bledsoe and C.R. Edwards (1984)
Effects of insecticides on Pediobius foveolatus (Hymenoptera: Eulophidae), a parasitoid of the Mexican bean beetle (Coleoptera: Coccinellidae)
Environmental Entomology 13 (3), 902-906
Abstract: We studied the effects of insecticides on Pediobius foveolatus (Crawford), a parasitoid of the Mexican bean beetle, Epilachna varivestis Mulsant. Acephate, carbaryl, carbophenothion, dimethoate, encapsulated methyl parathion, and methomyl (two formulations) were applied by helicopter to a soybean field at normally recommended rates. The effects on immature parasitoids were assessed by exposing parasitized hosts at the time of application. Adult parasitoid mortality was assessed by exposing females to field residue samples. Insecticide applications had no effect on the survival of mature pupae of P. foveolatus. However, prepupae and young pupae were vulnerable, especially to methyl parathion and acephate. The residues of parathion and carbaryl caused high adult mortalities for 6 to 9 days following application. The remaining insecticide residues dissipated to nontoxic levels after 1 to 3 days. It was concluded that acephate, dimethoate, and methomyl were most promising for developing a Mexican bean beetle management program involving P. foveolatus.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Database assignments for author(s): C. Richard Edwards

Research topic(s) for pests/diseases/weeds:
health/environmental effects of pesticides
control - general
Research topic(s) for beneficials or antagonists:
resistance to pesticides

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Epilachna varivestis	Soybean (Glycine max)	U.S.A. (NE)
Pediobius foveolatus (parasitoid)	Epilachna varivestis	Soybean (Glycine max)	U.S.A. (NE)