| Title: | Behavioral manipulation of Drosophila suzukii for pest control: high attraction to yeast enhances insecticide efficacy when applied on leaves |
| Author(s): | Rehermann G; Spitaler U; Sahle K; Cossu CS; Donne LD; Bianchi F; Eisenstecken D; Angeli S; Schmidt S; Becher PG; |
| Address: | "Chemical Ecology - Horticulture, Department of Plant Protection Biology, Swedish University of Agricultural Sciences, Alnarp, Sweden. Entomology Group, Institute for Plant Health, Laimburg Research Centre, Auer (Ora), Italy. Institute of Plant Protection, Department of Crop Sciences, University of Natural Resources and Life Sciences, Vienna, Austria. Laboratory for Flavours and Metabolites, Institute for Agricultural Chemistry and Food Quality, Laimburg Research Centre, Auer (Ora), Italy. Faculty of Science and Technology, Free University of Bozen-Bolzano, Bolzano, Italy" |
| ISSN/ISBN: | 1526-4998 (Electronic) 1526-498X (Linking) |
| Abstract: | "BACKGROUND: The invasive pest, Drosophila suzukii attacks fresh soft-skinned fruit. Broad-spectrum insecticides are implemented for control but there is a need to reduce environmental risks and insecticide residues on fruits. Hanseniaspora uvarum is a yeast frequently found on ripe fruits and associated with D. suzukii. We aim to exploit the ecological association and attraction of D. suzukii to H. uvarum by developing an attract-and-kill strategy, with spray-application on canopy but not fruit. We therefore investigated D. suzukii attraction, egg-laying and mortality when exposed to insecticidal yeast-based formulations. RESULTS: Hanseniaspora uvarum strongly attracted D. suzukii when applied on leaves of grapevine, Vitis vinifera. Notably, this attractiveness was competitive to ripe grape berries that were susceptible to D. suzukii infestation. Moreover, adding H. uvarum enhanced the efficacy of insecticidal formulations against D. suzukii. Flies exposed to leaves treated with yeast-insecticide formulations showed higher mortality and laid a lower number of eggs compared to flies exposed to insecticide alone. In a wind tunnel, all treatments containing H. uvarum alone or in combination with insecticides, caused similar upwind flight and landing at the odor source, which provides evidence that the addition of insecticide did not reduce D. suzukii attraction to yeast. CONCLUSION: Hanseniaspora uvarum can be used to manipulate the behavior of D. suzukii by attracting flies to insecticide formulations. Yeast attraction is competitive to grape berries and improves insecticide effectiveness, suggesting that sprays covering canopy only, could reduce residues on fruit without compromising management efficacy" |
| Keywords: | Animals Behavior Control Drosophila Fruit Insect Control *Insecticides/pharmacology Oviposition Plant Leaves integrated pest management semiochemicals spinosad spotted wing drosophila viticulture; |
| Notes: | "MedlineRehermann, Guillermo Spitaler, Urban Sahle, Karolina Cossu, Carlo S Donne, Lorenz Delle Bianchi, Flavia Eisenstecken, Daniela Angeli, Sergio Schmidt, Silvia Becher, Paul G eng European Commission/ Sveriges Lantbruksuniversitet/ Uruguayan National Agency for Research and Innovation/ Swedish Research Council Formas/ European Regional Development Fund/ England 2021/10/31 Pest Manag Sci. 2022 Mar; 78(3):896-904. doi: 10.1002/ps.6699. Epub 2021 Nov 17" |
