Recent Trends in the Economic Impact of Drosophila suzukii

Ros, G. De; Grassi, A.; Pantezzi, T.

doi:10.1007/978-3-030-62692-1_2

Cited by 13 publications

(12 citation statements)

References 39 publications

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“…Such observations have been made a short time after the first reports of G. brasiliensis and L. japonica in the area (one and four years, respectively), and most likely the parasitoids' dispersal is still ongoing (Abram et al 2022b). In the area of the present study, D. suzukii is considered a major pest of soft fruit and, more than a decade after the introduction, its impact still accounts for 9% of the potential revenues, mostly due to costly control measures (De Ros et al 2020). Realistic expectations for impact of classical biological control in Italy might be that G. brasiliensis will contribute in restoring part of the top-down pest suppression existing in the D. suzukii native area.…”

Section: Discussionmentioning

confidence: 94%

First report on classical biological control releases of the larval parasitoid Ganaspis brasiliensis against Drosophila suzukii in northern Italy

et al. 2023

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Current management strategy of the invasive fruit fly Drosophila suzukii (Matsumura) (Diptera: Drosophilidae) exploits different tools but relies mainly on chemical control. In the invaded areas, the local natural enemy community mostly consists of generalist pupal parasitoids unable to control the pest efficiently. Conversely, in the pest native area, there are more specialized sympatric larval parasitoids attacking D. suzukii. Following foreign explorations and quarantine risk assessments, the larval endoparasitoid Ganaspis brasiliensis (Ihering) (Hymenoptera: Figitidae) was selected as the best candidate for classical biological control programs. In 2021, the first ever propagative biocontrol program using a Japanese G1 lineage of G. brasiliensis started in Italy. Here we report the results of the first year of releases in the province of Trento (Northeast Italy), wherein G. brasiliensis was released in 12 locations. Pre- and post-release samplings on fresh and fallen fruits were performed around the release points to assess the recapture rate, the impact of the exotic parasitoid on D. suzukii and its potential interactions with local non-target species. After releases, G. brasiliensis was recovered at 50% of the locations. The exotic parasitoid only emerged from D. suzukii, mostly from fresh fruit still on the plant. Post-overwintering monitoring revealed the presence of a four G. brasiliensis individuals at two release locations.

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Section: Discussionmentioning

confidence: 94%

First report on classical biological control releases of the larval parasitoid Ganaspis brasiliensis against Drosophila suzukii in northern Italy

et al. 2023

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“…The findings are the same in Europe with damage up to 100% on strawberries, cranberries and cherries, representing 3 million € of economic losses in 2011 (Asplen et al, 2015;De Ros et al, 2013;Weydert & Mandrin, 2013). More recently, the total losses linked to D. suzukii have been estimated at more than 800.000 € in one year in the province of Trento (Italy) while growers used control methods (De Ros et al, 2021). These examples do not include the increase in management costs for growers.…”

Section: Economic Impactmentioning

confidence: 99%

Feriez-vous du mal à une mouche ? Une introduction à Drosophila suzukii et aux méthodes alternatives pour contrôler cette espèce invasive.

Galland¹

2022

Bull. Soc. R. Sci. Liege

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The Green Revolution has greatly changed agricultural production methods. Agriculture has become more specialized and intensive, and the use of phytopharmaceutical products, including insecticides, has intensified. However, these are harmful to the environment and human health. At the same time, globalization has led to the introduction of alien species (called invasive), whose establishment in Europe has been facilitated by the abundance of nutritive resources and the absence of natural enemies. These observations are particularly true with Drosophila suzukii. This fly is now considered as the main fruit pest in the world. Thus, it is becoming urgent to find alternative control methods to insecticides to counter the economic damage caused by this new pest. However, the development of an integrated pest management approach requires an excellent understanding of the biology and ecology of the species. In this paper, we first present the state of knowledge on the life cycle, host plants and phenology of D. suzukii. The current geographical distribution and the history of invasion of this pest are detailed, before estimating the extent of the economic losses caused. In a second part, the known alternative control methods against D. suzukii are listed: cultural practices, post-harvest treatments, sterile insect releases, uses of natural enemies and behavioral manipulations (visual and olfactory). Finally, in a third part, we will see how these methods can be combined to improve the control of this pest.

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“…suzukii infests mostly in soft fruits such as highbush blueberry, raspberry, blackberry, strawberry, currant, apricot, peach, cherry, plum and even wine grapes [17,18]. Since its first detection in Europe in 2008 (Spain and Italy), this insect has spread extremely quickly across the continent, causing economic losses amounting to millions of US dollars [19]. Estimated revenue losses caused by D. suzukii in strawberry, raspberry, blueberry and blackberry production in 2011-2013 in the Italian province of Trento were around 3 million euros per year (including partial budgeting).…”

Section: Introductionmentioning

confidence: 99%

Biospeckle Activity of Highbush Blueberry Fruits Infested by Spotted Wing Drosophila (Drosophila suzukii Matsumura)

2022

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In this study, the potential of the biospeckle phenomenon for detecting fruit infestation by Drosophila suzukii was examined. We tested both graphical and analytical approaches to evaluate biospeckle activity of healthy and infested fruits. As a result of testing the qualitative approach, a generalized difference method proved to be better at identifying infested areas than Fujii’s method. Biospeckle activity of healthy fruits was low and increased with infestation development. It was found that the biospeckle activity index calculated from spatial-temporal speckle correlation of THSP was the best discriminant of healthy fruits and fruits in two different stages of infestation development irrespective of window size and pixel selection strategy adopted to create the THSP. Other numerical indicators of biospeckle activity (inertia moment, absolute value of differences, average differences) distinguished only fruits in later stage of infestation. Regular values of differences turned out to be of no use in detecting infested fruits. We found that to provide a good representation of activity it was necessary to use a strategy aimed at random selection of pixels gathered around the global maximum of biospeckle activity localized on the graphical outcome. The potential of biospeckle analysis for identification of highbush blueberry fruits infested by D. suzukii was confirmed.

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Recent Trends in the Economic Impact of Drosophila suzukii

Cited by 13 publications

References 39 publications

First report on classical biological control releases of the larval parasitoid Ganaspis brasiliensis against Drosophila suzukii in northern Italy

First report on classical biological control releases of the larval parasitoid Ganaspis brasiliensis against Drosophila suzukii in northern Italy

Feriez-vous du mal à une mouche ? Une introduction à Drosophila suzukii et aux méthodes alternatives pour contrôler cette espèce invasive.

Biospeckle Activity of Highbush Blueberry Fruits Infested by Spotted Wing Drosophila (Drosophila suzukii Matsumura)

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