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Environ Entomol ; 46(4): 907-915, 2017 08 01.
Article in English | MEDLINE | ID: mdl-28531323

ABSTRACT

Drosophila suzukii Matsumura, spotted wing drosophila, can be trapped with a feeding attractant based on wine and vinegar volatiles and consisting of acetic acid, ethanol, acetoin, and methionol. Using that four-component blend, we found that the catch of spotted wing drosophila increased with increases in the release rate of acetoin (from 0.5 mg/d to 34 mg/d) from polyethylene sachet dispensers, and with increases in the concentrations of acetic acid (from 0.25% to 4%) or ethanol (from 0.08% to 2%) when dispensed in the trap drowning solution. However, we saw no increase in spotted wing drosophila trapped with increase of the methionol release rate from 0.4 mg/d to 4.9 mg/d or from 0.19 mg/d to 0.8 mg/d, from sachets. A new formulation based on optimized amounts of these four chemicals yielded a doubling of spotted wing drosophila trapped compared to a previously reported formulation. Further field testing confirmed that the simultaneous increases in the release rate of acetoin from a dispenser and the amount of acetic acid in the trap drowning solution provided the increased spotted wing drosophila trap response to the new formulation. These findings provide a practical means to improve the power of this lure to detect and monitor D. suzukii.


Subject(s)
Chemotaxis , Drosophila/drug effects , Insect Control , Pheromones/pharmacology , Acetic Acid/pharmacology , Acetoin/pharmacology , Animals , Dose-Response Relationship, Drug , Drosophila/physiology , Ethanol/pharmacology , Female , Male , Propanols/pharmacology , Sulfides/pharmacology
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