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1 April 2003 Impact of Lambda-cyhalothrin on Intraguild Predation Among Three Mite Predators
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Abstract
The impact of a sublethal dose of lambda-cyhalothrin on intraguild predation between three mite predators, Hyaliodes vitripennis (Say), Harmonia axyridis Pallas, and Amblyseius fallacis (Garman) was evaluated in laboratory. The symmetry and level of intraguild predation in selected predator combinations were recorded in the absence and presence of lambda-cyhalothrin. The mobility of the different predatory stages was also recorded in the absence and presence of insecticide. The results showed that lambda-cyhalothrin did not significantly modify intraguild predation but it affected the mobility. A knockdown effect was observed in H. axyridis larvae and in H. vitripennis nymphs, whereas A. fallacis showed an increased mobility. Exposure to a sublethal dose of lambda-cyhalothrin modified predator behavior and must be considered in the implementation of a mite control program in apple orchards.
Caroline Provost, Daniel Coderre, Éric Lucas and Noubar J. Bostanian "Impact of Lambda-cyhalothrin on Intraguild Predation Among Three Mite Predators," Environmental Entomology 32(2), (1 April 2003). https://doi.org/10.1603/0046-225X-32.2.256
Received: 17 October 2001; Accepted: 1 July 2002; Published: 1 April 2003
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