The Efficacy of Yeast Phagostimulant Baits in Attract-and-Kill Strategies Varies between Summer- and Winter-Morphs of Drosophila suzukii

Jones, Rory, Eady, Paul, Goddard, Matthew and Fountain, Michelle T. (2022) The Efficacy of Yeast Phagostimulant Baits in Attract-and-Kill Strategies Varies between Summer- and Winter-Morphs of Drosophila suzukii. Insects, 13 (11). p. 995. ISSN 2075-4450

Full content URL: https://doi.org/10.3390/insects13110995

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he Efficacy of Yeast Phagostimulant Baits in Attract-and-Kill Strategies Varies between Summer- and Winter-Morphs of Drosophila suzukii
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Abstract

Drosophila suzukii (Matsumura), is a globally invasive pest of soft and stone fruit. To survive winter in temperate zones it enters a reproductive diapause in a morphologically distinct phenotype. Phagostimulant baits can be combined with insecticides in attract-and-kill strategies for control. We investigated the effectiveness of single yeast species and combinations of co-fermented yeast phagostimulant baits when combined with insecticides in laboratory assays against both summer- and winter-morph D. suzukii. Candida zemplininia or Hanseniaspora uvarum + C. zemplininia combined with lambda-cyhalothrin or cyantraniliprole, and H. uvarum combined with cyantraniliprole caused significantly higher mortality in winter- compared to summer-morph D. suzukii. Additionally, lambda- cyhalothrin combined with M. pulcherrima + H. uvarum resulted in greater mortality compared to single yeasts, H. uvarum for both summer- and winter-morphs and C. zemplininia for summer- morphs. M. pulcherrima + H. uvarum with spinosad significantly reduced the time-to-kill (50%) of summer-morphs compared to insecticide alone. Most yeast-based baits were comparable in terms of attract-and-kill efficacy to Combi-protec, a commercially available bait, although M. pulcherrima or H. uvarum + C. zemplininia in with cyantraniliprole were less effective. Our study suggests that yeast phagostimulants in attract-and-kill strategies should be adjusted for summer- and winter-morph D. suzukii for more effective control.

Keywords:spotted wing drosophila, SWD, drosophilae, integrated pest management, pesticide, lure, toxic bait
Subjects:D Veterinary Sciences, Agriculture and related subjects > D414 Crop Protection
C Biological Sciences > C360 Pest Science
D Veterinary Sciences, Agriculture and related subjects > D614 Fruit Science
C Biological Sciences > C110 Applied Biology
D Veterinary Sciences, Agriculture and related subjects > D410 Arable and Fruit Farming
Divisions:College of Science > School of Life and Environmental Sciences > Department of Life Sciences
ID Code:52341
Deposited On:13 Dec 2022 14:44

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