The escalating threat of Drosophila suzukii (SWD) in the United States is driving efforts in combating this invasive berry-feeding fly, with a particular emphasis on biological control.
The SCRI project for the sustainable management of Drosophila suzukii, involving entomologists from various institutions, has highlighted the recent outcomes of national releases of the parasitoid wasp Ganaspis brasiliensis (G1 lineage), approved by the USDA Animal and Plant Health Inspection Service (APHIS) as a biocontrol method.
Incorporating 14 universities, three USDA laboratories, and two state agriculture departments, the SCRI project expanded its scope in 2022 involving entomologists in 12 states, and further broadened its impact involving 15 states the following year.
Prior to the recent releases of G. brasiliensis (G1), another parasitoid wasp, Leptopilina japonica, was accidentally introduced in British Columbia, subsequently spreading to other North American states.
Xingeng Wang, an entomologist at USDA ARS, and his team coordinated the releases and monitoring of the parental colony of G. brasiliensis (G1) in various states, highlighting the presence of wasps before and after releases and analyzing the seasonal dynamics of parasitism.
The results demonstrate a parallel between the onset of SWD and the appearance of parasitoid wasps, indicating a strong correlation between the two. This pattern was observed across various states, suggesting the potential success of the biological control method.
Wang advocates for continued research and monitoring of parasitoid wasps to better understand their adaptability and interaction with the surrounding environment, and promotes the combined use of chemical and biological tactics to effectively address the persistent threat posed by SWD.
In conclusion, the integrated approach to SWD management, involving the engagement of exotic natural enemies such as G. brasiliensis (G1) and L. japonica, emerges as a promising strategy to mitigate the impacts of this parasite in orchards.
Source: Growing Produce
Image: Antropocene.it
18 Sep 2025
Cherry cultivation has become one of the most profitable farming activities thanks to new high-performing varieties, dwarfing rootstocks, passive protection systems, and modern pruning methods. This guide provides useful tips for managing a cherry orchard successfully.
21 Jan 2025
Raúl Orellana highlights that “firmness and the green color of the stem are key attributes for Chinese consumers,” as a brown stem is perceived as a sign of loss of freshness.
06 Mar 2026
In Chile, the world leader in cherry exports, an INIA study analyzes the evolution of Pseudomonas syringae pv. syringae in commercial orchards. The research highlights local adaptation and copper resistance as key factors for integrated management and sustainable production.
06 Mar 2026
Tart cherries, rich in melatonin, tryptophan and polyphenols, may improve sleep and reduce inflammation and oxidative stress. A review of seven clinical studies analyzed effects on sleep duration, efficiency and biomarkers, with promising but not consistent results.
