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Research article - Peer-reviewed, 2022

Behavioral manipulation of Drosophila suzukii for pest control: high attraction to yeast enhances insecticide efficacy when applied on leaves

Rehermann, Guillermo; Spitaler, Urban; Sahle, Karolina; Cossu, Carlo S.; Delle Donne, Lorenz; Bianchi, Flavia; Eisenstecken, Daniela; Angeli, Sergio; Schmidt, Silvia; Becher, Paul G.


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.


integrated pest management; semiochemicals; spinosad; spotted wing drosophila; viticulture

Published in

Pest Management Science
2022, volume: 78, number: 3, pages: 896-904

Authors' information

Rehermann, Guillermo (Rehermann Del Rio, Guillermo)
Swedish University of Agricultural Sciences, Department of Plant Protection Biology
Spitaler, Urban
Laimburg Research Center
Sahle, Karolina
Swedish University of Agricultural Sciences, Department of Plant Protection Biology
Cossu, Carlo S.
Laimburg Research Center
Delle Donne, Lorenz
Laimburg Research Center
Delle Donne, Lorenz
University of Natural Resources and Life Sciences, Vienna
Bianchi, Flavia
Laimburg Research Center
Eisenstecken, Daniela
Laimburg Research Center
Angeli, Sergio
Free University of Bozen-Bolzano
Schmidt, Silvia
Laimburg Research Center
Swedish University of Agricultural Sciences, Department of Plant Protection Biology

UKÄ Subject classification

Agricultural Science

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