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
09 Sep 2025
A study in Skierniewice, Poland, tested innovative methods to enhance sour cherry seed germination. Seed coat removal combined with cold stratification produced stronger seedlings faster, cutting time and costs while boosting breeding efficiency and genetic progress.
16 Oct 2024
Riverking stated to Asiafruit that 80 boxes of Río King cherries landed at Shanghai Pudong Airport on October 12 and were transferred to the Shanghai Huizhan market on October 14. The delivery included a range of extra-large and jumbo cherries of the Cheery Crunch variety.
29 Jul 2026
UPA-UCE and Asaja urge the Extremadura government to launch an emergency plan for cherry growers in northern Cáceres after storms caused losses above €20 million, destroyed harvests, cut farm income below production costs and exposed major gaps in crop insurance today.
29 Jul 2026
In the United Kingdom, BeeSAM2 combines artificial intelligence and computer vision to detect bee visits to cherry blossoms with high accuracy, reducing manual analysis while improving research into pollination, fruit set, crop stability and orchard productivity.
