Potential use of Annona by products to control Drosophila suzukii and toxicity to its parasitoid Trichopria anastrephae

• Published in: Industrial crops and products 2017-12, Vol.110, p.30-35
• Main Authors: Bernardi, Daniel, Ribeiro, Leandro, Andreazza, Felipe, Neitzke, Camila, Oliveira, Eugênio Eduardo, Botton, Marcos, Nava, Dori Edson, Vendramim, José Djair
• Format: Article
• Language: English
• Subjects: Annona mucosa; Annonin; Bioactivity; Rolliniastatin-1; Spotted wing Drosophila; Sustainable pest management
• ISSN: 0926-6690; 1872-633X
• DOI: 10.1016/j.indcrop.2017.09.004

•The toxicity of Annona seed extracts to D. suzukii was assessed.•A. mucosa derivative was the most active treatment through oral and contact exposure.•All tested Annona extracts caused oviposition deterrence.•A. mucosa extract caused low mortality of T. anastrephae by ingestion, but was toxic by contact.•A. mucosa extract did not altered the parasitism rates of T. anastrephae. Extracts of Annona (Annonaceae) plants have been shown to satisfactorily control several insect pest species, especially on Neotropical regions. Here, we tested the potential use of formulated ethanolic seed-extracts of three Annona species (i.e., A. mucosa Jacq., A. muricata L. and A. sylvatica A. St.-Hil) to control the invasive pest Drosophila suzukii Matsumura, 1931 (Diptera: Drosophilidae). Using a discriminatory concentration (i.e., 2000mgL−1) for all the extracts, our results revealed that only the formulation based on A. mucosa seed-extract caused mortality above 85%, which was equivalent to the mortality caused by the synthetic insecticide spinetoram, our positive control. However, D. suzukii laid significantly fewer eggs in strawberry fruits treated with any of the formulated Annona extracts when compared to fruits that were not subjected to insecticide applications. The concentration-mortality curves for A. mucosa formulated extracts on D. suzukii were determined, and the application of this extract at LC90 (i.e., 1,995.04mgL−1) caused low mortality (33%) of the parasitoid Trichopria anastrephae Lima (Hymenoptera: Diapriidae) though ingestion exposure; however, it was toxic (70% mortality) to this natural enemy of D. suzukii by means of contact exposition. Behavior of parasitoids that survived exposure to the LC90 of A. mucosa formulated extract or of spinetoram (i.e., 105.34mgL−1) was not significantly affected. Thus, the A. mucosa formulated extract exhibited potential to be used in the management programs of D. suzukii, especially in organically based production systems where there are fewer control tools available.