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Insects 2017, 8(4), 117; doi:10.3390/insects8040117

Reduced Drosophila suzukii Infestation in Berries Using Deterrent Compounds and Laminate Polymer Flakes

1
School of Environmental Sciences, University of Guelph, 50 Stone Rd. E., Guelph, ON N1G 2W1, Canada
2
Vineland Research and Innovation Centre, 4890 Victoria Ave. N., Box 4000, Vineland Station, ON L0R 2E0, Canada
*
Author to whom correspondence should be addressed.
Academic Editor: Alberto Pozzebon
Received: 1 September 2017 / Revised: 29 September 2017 / Accepted: 13 October 2017 / Published: 31 October 2017
View Full-Text   |   Download PDF [2926 KB, uploaded 31 October 2017]   |  

Abstract

Drosophila suzukii (Matsumura) is a recent invasive pest of soft fruits in North and South America and Europe. Control relies on frequent applications of synthetic insecticides. Additional tactics are needed for development of an effective integrated pest management program. Study objectives were to evaluate the repellency and oviposition deterrent capability of compounds in plant essential oils and the effect of select compounds on infestation rates in strawberries, using laminate polymer flakes as a carrier. Of 14 compounds from 5 essential oils, thymol was the most repellent to adult D. suzukii males and females for up to 24 h in the laboratory. Citronellol, geraniol and menthol were moderately repellent. In a choice assay, thymol on cotton wicks adjacent to ripe raspberries reduced female fly landings and larval infestation levels. In a no-choice assay, thymol reduced female fly landings by 60%, larval infestation by 50% and increased fly mortality compared to controls. Neither citronellol alone nor a blend of four repellent compounds was as effective as thymol alone at reducing fly landing, larval infestation, or increasing fly mortality. In a choice assay using polymer flakes, larval infestation was greater in raspberries near untreated flakes than in raspberries near flakes treated with thymol or peppermint oil. In the field, thymol and peppermint flakes reduced larval infestation levels by 25% in strawberries at 4, but not 7, days after application, compared to untreated flakes. With future improvements in application strategies, deterrent compounds may have a role in improving the management of D. suzukii. View Full-Text
Keywords: spotted wing drosophila; repellents; essential oils; thymol; citronellol; peppermint; strawberry spotted wing drosophila; repellents; essential oils; thymol; citronellol; peppermint; strawberry
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MDPI and ACS Style

Renkema, J.M.; Buitenhuis, R.; Hallett, R.H. Reduced Drosophila suzukii Infestation in Berries Using Deterrent Compounds and Laminate Polymer Flakes. Insects 2017, 8, 117.

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