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Recent Trends in the Economic Impact of Drosophila suzukii

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Drosophila suzukii Management

Abstract

As D. suzukii was spreading almost globally, during the last decade the economic implications of the invasion have been examined by a rather heterogeneous body of research. Our review point out that the focus of these studies gradually moved from raising awareness about the magnitude of the damage, particularly on the industry, to aiding the decision-making process with regard to the control strategies progressively developed. The chapter then presents an update of an estimate carried out in the early phase of the invasion about the pest’s impact on soft fruit industry in the province of Trento (Italy). On the basis of conservative assumptions, the economic impact on soft fruit production in the province of Trento amounts to 9% of the potential revenues, mostly due to costly control measures. Our estimates show that a decade after its introduction, D. suzukii keeps having a substantial negative impact on berry and cherry production.

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Notes

  1. 1.

    The review of Olson (2006) singled out a third line of research, concerning the relationship between terrestrial invasive species and international trade and trade policies, but to the best of the authors’ knowledge, there is no published study about Drosophila suzukii invasion and international trade.

  2. 2.

    At the end of 2016, the $US to CHF was approximately 1.01.

  3. 3.

    A total of 561 samples of about 50 fruits were taken in 2012, 685 in 2013, 698 in 2014, 972 in 2015, 978 in 2016, 1151 in 2017, 1083 in 2018, 451 in 2019 when the diffusion of exclusion netting hampered the collection of many samples.

  4. 4.

    For a comparison between these data and the results from the microscopic inspection of sampled fruits, see Del Fava et al. (2017, figure 3).

  5. 5.

    In 2015 the co-op grading detected D. suzukii’s damage in 9.09% of inspected cherries, in 11.31% of blueberries and in 6.51% of blackberries.

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Acknowledgements

We thank the Association of Fruit and Vegetable Producers of Trentino (APOT) and Gianluca Savini, of Sant’Orsola Farmers Co-operative, for providing us with the data on the current implementation of the exclusion netting and the data about the soft fruit grading, Pietro Molfetta of Provincial Agricultural Paying Agency for the data about soft fruit cultivation in the province of Trento. We also wish to thank our colleagues Sandro Conci and Sergio Franchini for the useful discussions.

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Correspondence to Giorgio De Ros .

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De Ros, G., Grassi, A., Pantezzi, T. (2020). Recent Trends in the Economic Impact of Drosophila suzukii. In: Garcia, F.R.M. (eds) Drosophila suzukii Management. Springer, Cham. https://doi.org/10.1007/978-3-030-62692-1_2

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