Abstract
Spotted wing drosophila, Drosophila suzukii Matsumura (Diptera: Drosophilidae), has become a key pest for soft fruits and cherries in Europe in less than a decade since the first outbreak in 2007. Although this pest’s passive dispersal ability has been observed over more than 1400 km in 1 year, active spread has not yet been extensively studied. A mark−release−recapture (MRR) method based on protein-marked flies was employed to determine the flight capacity of D. suzukii. Sterile marked flies were released and recaptured in a trap grid at increasing distances from 10 to 250 m from the releasing point to study flight distance during periods ranging from 3 h to 1 week. MRR experiments were replicated in the presence and absence of host fruits to study how they could affect dispersal behavior. The dispersal capacity of the Mediterranean fruit fly, Ceratitis capitata Wiedemann (Diptera: Tephritidae) was also studied under the same conditions. The results showed a low dispersal ability for D. suzukii, with a daily flight distance below 100 m with no predominant wind. The implications on natural dispersion and control methods based on attractants are discussed.
Highlights
Spotted-wing drosophila, Drosophila suzukii Matsumura (Diptera: Drosophilidae), native to Southeast Asia, has been revealed as a major damaging invasive fruit fly that threatens both the European and American fruit industries [1]
As the D. suzukii dispersal pattern significantly differed from that of C. capitata when the whole data set was included in the multifactor analysis of variance (MANOVA), 0.001),an ananalysis analysiswas wasperformed performed separately separately for for each each insect insect and and season: F
When we focused on dispersal capacity in 1 week after release, we observed that D. suzukii mainly remained within the first
Summary
Spotted-wing drosophila, Drosophila suzukii Matsumura (Diptera: Drosophilidae), native to Southeast Asia, has been revealed as a major damaging invasive fruit fly that threatens both the European and American fruit industries [1]. Research on alternative control methods to be included in Integrated Pest Management programs is crucial to reduce or avoid the aforementioned drawbacks of chemical control. These tactics include cultural management [7,8], biological control with both natural enemies and microbiological agents [9,10,11], and trapping techniques, based mainly on the use of food baits [12,13]. Knowledge on the fly dispersion and dispersal capacity is essential to develop control strategies
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