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United States Department of Agriculture

Agricultural Research Service

Research Project: Biologically Based Techniques for Control of Insect Pests

Location: Insect Behavior and Biocontrol Research Unit

Title: Sublethal effects of insecticides on the predators, Podisus nigrispinus and Supputius cincticeps: Implications for IPM

Authors
item DE Castro, Ancideriton -
item Correa, Alberto Soares -
item Legaspi, Jesusa
item Guedes, Raul Narciso CA -
item Serrao, Jose Eduardo -
item Zanuncio, Jose Cola -

Submitted to: Meeting Abstract
Publication Type: Abstract Only
Publication Acceptance Date: March 6, 2013
Publication Date: March 7, 2013
Citation: De Castro, A., Correa, A., Legaspi, J.C., Guedes, R.R., Serrao, J., Zanuncio, J. 2013. Sublethal effects of insecticides on the predators, Podisus nigrispinus and Supputius cincticeps: Implications for IPM. [abstract]. Annual Meeting of the Southeastern Branch of Entomological Society of America, Mar 3-6, 2013, Baton Rouge, Louisiana. p. 115-116.

Technical Abstract: Knowledge of the impact of insecticides on natural enemies is important information for integrated pest management programs (IPM). We assessed the toxicity and behavioral sublethal response of the predators, Podisus nigrispinus and Supputius cincticeps exposed to deltamethrin, methamidophos, spinosad and chlorantraniliprole. Concentration-mortality bioassays were done at different concentrations of insecticide solution with 10 third-instar larvae of Anticarsia gemmatalis or 10 third-instar nymphs of P. nigrispinus or S. cincticeps. Acute lethal toxicity was tested by placing 3rd instar nymphs on insecticide-impregnated filter paper. Two behavioral locomotory bioassays were carried out on 3rd instar nymphs of the predators – one using arenas fully-treated with insecticide and the other using half-treated arenas. Deltamethrin, methamidophos and spinosad caused 100% mortality of P. nigrispinus and S. cincticeps nymphs and, chlorantraniliprole proved to be most selective with low toxicity. Behavioral pattern changes were found for all pesticides, especially methamidophos and spinosad resulting in insecticide irritability in both predator species. Substitution of pyrethroid and organophosphate insecticides by chlorantraniliprole can be a key factor for the success of IPM programs of A. gemmatalis in soybeans.

Last Modified: 11/25/2014
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