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United States Department of Agriculture

Agricultural Research Service

Title: Toxicity of Insecticide-Bait Mixtures to Insecticide Resistant and Susceptible Western Corn Rootowrms (Coleoptera: Chrysomelidae)

Authors
item Parimi, Srinivas - UNIV OF NEBRASKA-LINCOLN
item Meinke, Lance - UNIV OF NEBRASKA-LINCOLN
item Nowatzki, Timothy - UNIV OF NEBRASKA-LINCOLN
item Chandler, Laurence
item French, Bryan
item Siegfreid, Blair - UNIV OF NEBRASKA-LINCOLN

Submitted to: Crop Protection
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: February 8, 2003
Publication Date: June 1, 2003
Citation: PARIMI, S., MEINKE, L.J., NOWATZKI, T.M., CHANDLER, L.D., FRENCH, B.W., SIEGFREID, B.D. TOXICITY OF INSECTICIDE-BAIT MIXTURES TO INSECTICIDE RESISTANT AND SUSCEPTIBLE WESTERN CORN ROOTOWRMS (COLEOPTERA: CHRYSOMELIDAE). CROP PROTECTION. 2003. V. 22 p. 781-786.

Interpretive Summary: Organophosphate resistant and susceptible populations of the western corn rootworm were subjected to adult feeding bioassays with different combinations of insecticide and a cucurbitacin bait. Five insecticides were used in combination with the cucurbitacin bait (Invite EC) as the feeding stimulant. Differences in susceptibility to the insecticide/bait combinations were observed among the resistant and susceptible populations for methyl-parathion and carbaryl. Susceptibility to fipronil, bifenthrin and indoxacarb was similar among the resistant and susceptible populations. Assays in which response to the insecticide/bait combination was compared with the bait alone indicated that methyl-parathion and bifenthrin were deterrent when compared to other treatments. These results suggest that the efficacy of Invite as a feeding stimulant in combination with certain insecticides may be compromised by insecticide resistant western corn rootworms and by insecticides that antagonize the feeding stimulation of the cucurbitacin bait.

Technical Abstract: Organophosphate resistant and susceptible populations of the western corn rootworm, Diabrotica virgifera virgifera LeConte, were subjected to adult feeding bioassays with different combinations of insecticide and a cucurbitacin bait. Five technical grade insecticides (methyl-parathion, carbaryl, fipronil, bifenthrin and indoxacarb) were used in combination with Invite EC(TM) as the feeding stimulant. Differences in susceptibility to the insecticide/bait combinations were observed among the resistant and susceptible populations for methyl-parathion and carbaryl. Susceptibility to fipronil, bifenthrin and indoxacarb was similar among the resistant and susceptible populations. Assays in which response to the insecticide/bait combination was compared with the bait alone indicated that methyl-parathion and bifenthrin were deterrent when compared to other treatments. These results suggest that the efficacy of Invite as a feeding stimulant in combination with certain insecticides may be compromised by previously identified resistance and by insecticides that antagonize the feeding stimulation of cucurbitacin bait.

Last Modified: 8/21/2014