Journal of Economic Entomology (2019) 112, 1197-1206

Daniele Cristine Hoffmann Schlesener, Jutiane Wollmann, Juliano de Bastos Pazini, Aline Costa Padilha, Anderson Dionei Grützmacher and Flávio Roberto Mello Garcia (2019)
Insecticide toxicity to Drosophila suzukii (Diptera: Drosophilidae) parasitoids: Trichopria anastrephae (Hymenoptera: Diapriidae) and Pachycrepoideus vindemmiae (Hymenoptera: Pteromalidae)
Journal of Economic Entomology 112 (3), 1197-1206
Abstract: Drosophila suzukii (Matsumura) is an important pest of small fruits, which has been causing significant damage to commercial crops in North America, Europe, and South America. This pest is mainly controlled with insecticide applications because of its highly biotic potential and polyphagy. However, studies conducted in crops infested by D. suzukii have shown that this species is attacked by parasitoids that may serve as effective biological controls for this pest. The aim of the current study is to assess the lethal time (LT₁₀ and LT₅₀) and parasitism potential of exposed adults (F₀): sex ratio and longevity (F₁) of Trichopria anastrephae Lima and Pachycrepoideus vindemmiae (Rondani) when exposed to dry residues of different commercial insecticides. Abamectin, acetamiprid, thiamethoxam, malathion, phosmet, deltamethrin, spinetoram, and spinosad were evaluated. Pachycrepoideus vindemmiae was more sensitive to insecticides than T. anastrephae, showing higher mortality rates in a shorter period of time, as well as a significant reduction in parasitism. Spinosyns (spinosad and spinetoram) and abamectin caused high P. vindemmiae mortality rates, but were harmless to T. anastrephae. Neonicotinoids, organophosphates, and pyrethroids caused high mortality rates regardless of the species. Treatments did not affect D. suzukii offspring longevity and sex ratio (F₁). The current study provides information needed for the implementation of D. suzukii management programs focused on the conservation of natural enemies.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Anderson Dionei Grützmacher, Flávio Roberto Mello Garcia

Research topic(s) for pests/diseases/weeds:
biocontrol - natural enemies
Research topic(s) for beneficials or antagonists:
resistance to pesticides

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Drosophila suzukii
Pachycrepoideus vindemmiae (parasitoid)	Drosophila suzukii
Trichopria anastrephae (parasitoid)	Drosophila suzukii