Two volatiles from anthracnose-infected blueberries trigger electrophysiological and aversive behavioral responses in Drosophila suzukii (Diptera: Drosophilidae)

Journal of Economic Entomology, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 30, 2025

Abstract Native to Southeast Asia, the spotted-wing drosophila (Drosophila suzukii Matsumura) is an economically important invasive pest of thin-skinned fruits such as raspberries, blueberries, and strawberries worldwide. To reduce reliance on insecticides for managing this pest, alternative strategies like behavioral manipulation are needed. Previous studies have shown that D. adults avoid blueberry infected with fungal pathogen Colletotrichum fioriniae Marcelino & Gouli, which causes anthracnose fruit rot, leading identification 9 potential repellent compounds. In study, we further investigated two most potent these compounds—ethyl butanoate ethyl (E)-but-2-enoate—to assess their properties antennal responses suzukii. Electroantennogram (EAG) assays revealed both esters elicited similar dose-dependent in male female suzukii, were often stronger than those triggered by 2-pentylfuran, a known species. Additionally, examined adult 3 compounds under semi-field field conditions using outdoor cages containing potted planted bushes, respectively. Results from cage showed all tested can significantly oviposition emergence fruits, (E)-but-2-enoate sometimes outperforming other Our findings indicate (E)-but-2-enoate, induced C. fioriniae-infected elicit effects antennae act effective deterrents. This supports promising tools through strategies.

Language: Английский

Field Testing of 2‐Pentylfuran as a Behavioural Control Tool for Spotted‐Wing Drosophila in Raspberries

Journal of Applied Entomology, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 19, 2024

ABSTRACT Spotted‐wing drosophila (SWD), Drosophila suzukii , is a major pest of various soft‐skinned fruit crops worldwide. We investigated an alternative approach to traditional insecticides manage SWD. Previously, we have shown that 2‐pentylfuran (2pf) reduced oviposition in raspberries laboratory and small‐scale field studies. Here, further the potential 2pf as management tool for SWD under more realistic conditions. tested efficacy open conditions 2019 2020 using isolated plots raspberries. For two trials, used single raspberry fruiting inflorescences deployed sachet 48 h 6 days, respectively, assessed infestation. did not find any significant differences infestation trial but found noticeable reductions when was days. In 2020, randomly assigned treatments entire small, research planting with different doses (low, medium, high) both summer fall recorded infestations. The low medium resulted plantings densities were (summer crop), only high dose infestations pressure crop. Our study shows has highly susceptible crop, its effectiveness may vary depending on release rates abundance. Future studies are needed test combination other repellents or targeted insecticides.

Language: Английский