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Assessment of a commercial spider venom peptide against spotted-wing Drosophila and interaction with adjuvants
Chemical control of insect pests in food crops is dominated by broad-spectrum insecticides from a few classes, and there is an urgent need for alternative modes of action. We examined the efficacy of a spider venom peptide, GS-omega/kappa-Hxtx-Hv1a (hereafter, Hv1a) for control of spotted-wing Droso...
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Published in: | Journal of pest science 2018-09, Vol.91 (4), p.1279-1290 |
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Main Authors: | , , , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
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Summary: | Chemical control of insect pests in food crops is dominated by broad-spectrum insecticides from a few classes, and there is an urgent need for alternative modes of action. We examined the efficacy of a spider venom peptide, GS-omega/kappa-Hxtx-Hv1a (hereafter, Hv1a) for control of spotted-wing Drosophila and evaluated the importance of phagostimulants and adjuvants for its efficacy. Topical and residual activity of Hv1a was low, with only 17.5% of exposed adult
D. suzukii
dying after 72 h. In contrast, 100% adult mortality was observed after 24 h when three adjuvants were added to Hv1a. Survival of eggs of
D. suzukii
oviposited into blueberries was also reduced by exposure to Hv1a combined with the same adjuvants, indicating that Hv1a activity against
D. suzukii
in the laboratory, but requires penetration of the insect cuticle for efficacy. In a field trial in blueberries, Hv1a gave comparable control to phosmet, and significantly reduced infestation in fruit. This biopesticide adds a new mode of action to the options available for integrated pest management of this and other insect’s pests. |
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ISSN: | 1612-4758 1612-4766 |
DOI: | 10.1007/s10340-018-1016-7 |