Plastic mulches reduce adult and larval populations of Drosophila suzukii in fall-bearing raspberry

McIntosh, Hanna; Atucha, Amaya; Townsend, Philip A.; HILLS, WILLIAM B.; Guédot, Christelle

doi:10.1007/s10340-021-01456-2

Cited by 10 publications

(14 citation statements)

References 63 publications

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“…In contrast, academic researchers are often interested in assessing both the mean and variance of the prevalence and intensity of fruit infestation (Table 1; McIntosh et al 2022). In this case, incubation can allow for a more accurate estimation of infestation intensity.…”

Section: Discussionmentioning

confidence: 99%

A fast and reliable larval sampling method for improving the monitoring of fruit flies in soft and stone fruits

Zriki,

Belois,

Fournier

et al. 2023

Preprint

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The spotted-wing drosophila, Drosophila suzukii (Matsumura) (Diptera: Drosophilidae), threatens both the soft-skinned and stone fruit industry in Asia, Europe and America. Integrated pest management requires monitoring for infestation rates in real-time. Although baited traps are widely used for field monitoring, trap captures are weakly correlated to infestation rates. Thus, monitoring for larvae instead of adult flies represents the most reliable monitoring technique. Current methods for larval monitoring (e.g. dunk flotation) are both time-consuming and labor-intensive. In this study, we develop the sleeve method, a new method for monitoring larval infestation in strawberries through the inspection of fruits individually crushed within transparent plastic sleeves. Based on count data from both specialist and non-specialist observers, the estimation of larval infestation with the sleeve method is fast, precise and highly repeatable within and among all observers. Mean processing time is twice faster than previous methods and varies from 33 to 80 seconds per sample, depending on infestation levels. As the accuracy of the sleeve method decreases with infestation levels, we suggest ways to improve its accuracy by incubating fruits for 48h and calibrating data with exact counts. This new method is easier to use, faster and more cost-effective than previous monitoring methods. It could be used to monitor D. suzukii infestations in various fruit crops and is scalable to the farm-level for fruit growers or for academic research. Finally, the method represents a promising monitoring tool for effective management programs of D. suzukii and other insect pests of soft and stone fruits.

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Section: Discussionmentioning

confidence: 99%

A fast and reliable larval sampling method for improving the monitoring of fruit flies in soft and stone fruits

Zriki,

Belois,

Fournier

et al. 2023

Preprint

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“…Our results can be implemented in an integrated pest management method by adding a layer of sandy soil or a plastic mulch 33 on top of the ground under the fruit plants. This layer could decrease the hatching rate of D. suzukii due to the desiccation of the larvae and would expose the pupae to a range of antagonists, including T. drosophilae 18 .…”

Section: Discussionmentioning

confidence: 99%

Below ground efficiency of a parasitic wasp for Drosophila suzukii biocontrol in different soil types

Häussling

Mautner

Stökl

2022

Sci Rep

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The parasitoid wasp Trichopria drosophilae is promising as a biocontrol agent for controlling the ubiquitous pest Drosophila suzukii (Matsumura). Crucial for the successful implementation of any biocontrol agent is a high parasitisation rate by the parasitoid. Most studies investigating the parasitisation rate of D. suzukii pupae have focused on parasitisation in the fruit or in a petri dish. However, the predominant pupation site of D. suzukii in the field is the soil. Unfortunately, little is known on how well parasitoid wasps can detect and parasitise pupae of D. suzukii buried in the soil. Therefore, we conducted soil parasitisation experiments of T. drosophilae on D. suzukii pupae using two pupation depths in three different soil types (loamy sand, loam, and clay). In all three soil types, we found generally low D. suzukii pupae parasitisation rate by T. drosophilae, independent of the pupation depth. The pupation behaviour of D. suzukii and the parasitisation behaviour of T. drosophilae are discussed in detail. For pest control in most soil types, our results mean that the number of D. suzukii larvae pupating in the soil should be reduced, e.g., by adding a layer of sandy soil or covering the soil with plastic mulch. This might increase the probability of success when using T. drosophilae as a biocontrol agent.

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“…23,24 Recently Tait et al deeply reviewed the current knowledge on the D. suzukii control strategies highlighting future perspectives for a more sustainable and eco-friendly integrated pest management (IPM), 25 through the implementation of cultural, physical, genetic techniques and behavioral manipulation. [26][27][28] However, biological control has been considered as the most promising approach to manage D. suzukii and several methods have been set up, 29,30 including the intentional importation of the Asian Ganaspis brasiliensis Ihering (Hymenoptera: Figitidae), which is the best candidate for the classical biological control program among a panel of several co-evolved larval parasitoids. [31][32][33][34] However, the success of a classical biological control program requires the fulfillment of social, political and economic matters, as well as multiple field evaluations over the year.…”

Section: Introductionmentioning

confidence: 99%

Sublethal effects of nine insecticides on Drosophila suzukii and its major pupal parasitoid Trichopria drosophilae

Lisi,

Mansour,

Cavallaro

et al. 2023

Pest Management Science

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BackgroundAlthough the pupal parasitoid Trichopria drosophilae is employed in conservative and augmentative biocontrol of Drosophila suzukii infestations, current pest management strategies mostly rely on multiple insecticide applications. In this context, the aim of the study was to investigate the baseline toxicity of nine insecticides on D. suzukii larvae and their multiple sublethal effects (LC10) on immature stages of the pest feeding on contaminated diet and T. drosophilae developing within the intoxicated host.ResultsChlorpyriphos and azadirachtin showed the lowest and the highest LC10, which values were 9.78×1013 and 1.46×103 times lower than their recommended label field rate, respectively. Among tested insecticides, imidacloprid, malathion and dimethoate were the only treatments that did not affect the juvenile development time of D. suzukii, while spinosad and the organophosphates chlorpyriphos and dimethoate did not influence fly pupal size. No sublethal effects were recorded on T. drosophilae degree of infestation (DI) and juvenile development time. On the contrary, cyazypyr and dimethoate negatively affected the success of parasitism (SP) and the number of progeny of the pupal parasitoid, in association with malathion for the first parameter and spinosad for the fertility. Compared to the untreated control, more female progeny emerged following azadirachtin exposure, while dimethoate caused the opposite effect. Imidacloprid, lambda‐cyhalothrin and spinetoram decreased hind tibia length of emerged parasitoids.ConclusionThis study provides new insights on the (eco)toxicological profile of nine insecticides and new information needed to support the deployment of T. drosophilae in the field within the sustainable management techniques against D. suzukii.This article is protected by copyright. All rights reserved.

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Plastic mulches reduce adult and larval populations of Drosophila suzukii in fall-bearing raspberry

Cited by 10 publications

References 63 publications

A fast and reliable larval sampling method for improving the monitoring of fruit flies in soft and stone fruits

A fast and reliable larval sampling method for improving the monitoring of fruit flies in soft and stone fruits

Below ground efficiency of a parasitic wasp for Drosophila suzukii biocontrol in different soil types

Sublethal effects of nine insecticides on Drosophila suzukii and its major pupal parasitoid Trichopria drosophilae

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