Cost–benefit analysis of controlling the spotted wing drosophila (<i>Drosophila suzukii</i> (Matsumura)) spread and infestation of soft fruits in Trentino, Northern Italy

Fava, Emanuele Del; Ioriatti, C.; Melegaro, Alessia

doi:10.1002/ps.4618

Cited by 35 publications

(22 citation statements)

References 48 publications

(108 reference statements)

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“…This raises the question of which pest control strategy could be suggested to farmers. As biological control against the pest is still at the stage of laboratory assays (Rossi Stacconi et al., , ), farmers must rely on currently available preventive methods, such as insecticides and/or the use of exclusion netting (Chouinard, Firlej, & Cormier, ; Cormier, Veilleux, & Firlej, ; Del Fava, Ioriatti, & Melegaro, ) that should be applied at the end of summer (Baser et al., ).…”

Section: Discussionmentioning

confidence: 99%

Susceptibility of table grape varieties grown in south‐eastern Italy to Drosophila suzukii

Baser

Broutou

Verrastro

et al. 2018

J Applied Entomology

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Since 2008, Drosophila suzukii, the spotted wing drosophila, has colonized most of the American and European continents, being able to adapt to very different climates. In Italy, this pest has been captured from northern Alpine to southern Mediterranean regions where it can infest a broad range of fruits, including wine grapes. Studies have shown that oviposition levels and developmental rates of D. suzukii on wine grapes are lower than on other berries, although recent observations indicate that grapes may become a suitable host plant in particular conditions. Here, we report, for the first time, the results of a series of no-choice oviposition experiments using berries of five table grape varieties sampled in the provinces of Taranto and Bari (Apulia region, south-eastern Italy) during 2013 from both organic and conventional farming systems.The sugar content (SC) and skin hardness of each sample were analysed to assess the influence of these physiological parameters on the susceptibility of table grapes to D. suzukii infestation. A negative correlation was found between the number of eggs laid and berry skin penetration force, whereas there was a positive one between the number of eggs and Brix values, as well as sampling date. In organic grapes, SC and skin hardness of two varieties ("Crimson" and "Scarlotta") were measured, respectively, higher and lower than in conventional grapes, thus making them more susceptible to pest infestation. The study hence shows that in laboratory conditions D. suzukii is able to heavily infest and develop on table grapes and that susceptibility to its infestation significantly depends on both variety and farming system. K E Y W O R D Salien invasive pests, conventional and organic farming, fruit flies, pest control

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Section: Discussionmentioning

confidence: 99%

Susceptibility of table grape varieties grown in south‐eastern Italy to Drosophila suzukii

Baser

Broutou

Verrastro

et al. 2018

J Applied Entomology

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“…Unlike most other Drosophila species, D. suzukii possesses a serrated ovipositor, which allows it to lay its eggs in ripening undamaged berries, stone fruits, and grapes. Economic damages caused by D. suzukii in these crops is high [15,16], and has spurred research into sustainable control options [17,18], such as the augmentation of native natural enemies [19,20,21,22].…”

Section: Introductionmentioning

confidence: 99%

Influence of the Rearing Host on Biological Parameters of Trichopria drosophilae, a Potential Biological Control Agent of Drosophila suzukii

Woltering

Romeis

Collatz

2019

Insects

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Trichopria drosophilae is a pupal parasitoid that can develop in a large number of drosophilid host species including the invasive pest Drosophila suzukii, and is considered a biological control agent. We investigated the influence of the rearing host on the preference and performance of the parasitoid, using two different strains of T. drosophilae, reared on D. melanogaster or D. suzukii for approximately 30 generations. Host switching was employed to assess the impact of host adaptation on T. drosophilae performance. In a no-choice experimental setup, T. drosophilae produced more and larger offspring on the D. suzukii host. When given a choice, T. drosophilae showed a preference towards D. suzukii, and an increased female ratio on this host compared to D. melanogaster and D. immigrans. The preference was independent from the rearing host and was confirmed in behavioral assays. However, the preference towards D. suzukii increased further after a host switch from D. melanogaster to D. suzukii in just one generation. Our data indicate that rearing T. drosophilae for several years on D. melanogaster does not compromise its performance on D. suzukii in the laboratory. However, producing a final generation on D. suzukii prior to release could increase its efficacy towards the pest.

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“…Once D. suzukii eggs hatch, the larvae feed upon the flesh of the fruit, causing the fruit to collapse making it unmarketable (Emiljanowicz et al, 2014, Revadi et al, 2015, Rota-Stabelli et al, 2013, Silva-Soares et al, 2017. Additional costs of controlling this pest, such as insect-proof mesh, and increased crop hygiene levels and picking frequency, are unavoidable if growers are to ensure producing a commercially profitable crop (Del Fava et al, 2017, Farnsworth et al, 2017, Mazzi et al, 2017.…”

Section: Introductionmentioning

confidence: 99%

Implications of sub-lethal rates of insecticides and daily time of application on Drosophila suzukii lifecycle

et al. 2019

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The circadian clock is responsible for time keeping within an organism and influences not only behavioural patterns, but also physiological rhythms including toxin susceptibility. Drosophila suzukii Matsumura is a global horticultural pest, and identifying rhythms in insecticide susceptibility could contribute to improving integrated pest management practices. To determine whether time of application influences mortality, LC50 rates of cyantraniliprole, lambda-cyhalothrin, pyrethrum and spinosad were applied to groups of adult D. suzukii at two different times of day. Insecticides were directly applied using a benchtop sprayer. We found no influence of time on mortality or oviposition for any of the four insecticides applied. However, several discoveries were made regarding the impact of sub-lethal and lethal rates on D. suzukii mortality, oviposition and offspring survival over time. In most cases, all surviving females recovered from insecticide rates, and laid the same number of eggs as females treated with the water control. Seven days after application, females that were treated with the field rate of spinosad laid the same number of eggs as the control. The lowest rate of cyantraniliprole resulted in more eggs being laid, initially, with no negative impact on survival of eggs through to adult emergence. However, there were transgenerational impacts of egg to adult survival when parents were treated with sub-lethal rates of spinosad and lambda-cyhalothrin. Although no impact of daily phase of application was detected within this assay, the information surrounding how D. suzukii interacts with lethal and sub-lethal rates of insecticides is of great importance, especially for the resistance management of D. suzukii.

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Cost–benefit analysis of controlling the spotted wing drosophila (Drosophila suzukii (Matsumura)) spread and infestation of soft fruits in Trentino, Northern Italy

Cited by 35 publications

References 48 publications

Susceptibility of table grape varieties grown in south‐eastern Italy to Drosophila suzukii

Susceptibility of table grape varieties grown in south‐eastern Italy to Drosophila suzukii

Influence of the Rearing Host on Biological Parameters of Trichopria drosophilae, a Potential Biological Control Agent of Drosophila suzukii

Implications of sub-lethal rates of insecticides and daily time of application on Drosophila suzukii lifecycle

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