Abstract
Responses of non-target insects to a blend of plant volatiles used as components in an attract-and-kill formulation for Helicoverpa spp. (Lepidoptera: Noctuidae) were studied in an Australian cotton field. Two experiments, one involving suction sampling during the day and the other at night, were conducted. Rows that had been treated with the volatile blend, with no added insecticide, were sampled with a large suction sampler 18, 42, and 85 h (day experiment) and 6, 30, and 78 h (night experiment) after treatment. Rows located 5, 10, 20, and 300 m away from the treated row were similarly sampled. Of seven generalist predators, only one accumulated on the treated rows compared to the untreated rows. Of the other six, five were found in lower numbers on the treated rows, and for one no significant effects were detected. Compared to pre-spray baseline levels, numbers of several taxa increased across the whole field after spraying, suggesting area-wide attraction, but localized responses to the treated rows were weak, and apparent repellence was more common than attraction. We suggest that attract-and-kill with plant volatiles should have minimal effects on populations of these predators, and is likely to be compatible with integrated pest management.
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Acknowledgments
We are indebted to Rodney Dunlop for assistance with the suction sampling studies. The Australian Cotton Cooperative Research Centre provided funding and access to the field site, and AgBiTech Pty Ltd. provided the plant volatile formulation.
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Gregg, P.C., Del Socorro, A.P. & Binns, M.R. Non-Target Impacts of an Attract-and-Kill Formulation Based on Plant Volatiles: Responses of some Generalist Predators. J Chem Ecol 42, 676–688 (2016). https://doi.org/10.1007/s10886-016-0727-6
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DOI: https://doi.org/10.1007/s10886-016-0727-6