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
30 Apr 2024
The objective is to evaluate the impact of the technology in lengthening container transit times by combining controlled atmosphere with Tres Castillos macroperforated bags, thus enabling proper gas management and ensuring optimal moisture for the cherries.
09 Oct 2024
The objectives of a Serbian study were to compare and ascertain the toxicity of Fludioxonil against selected isolates of M. laxa, M. fructigena and M. fructicola, to test its efficacy in detached fruit and to evaluate its effectiveness under practical control conditions.
12 May 2026
In Romania, the first cherries of the season reach shelves at 80 to 100 RON/kg, while Portugal, Spain and Greece offer far more competitive prices. Consumers are waiting for June, when local cherries may increase supply and ease market pressure.
12 May 2026
A study on light-colored cherries in Konya, Turkey, analyzes energy efficiency, production inputs and greenhouse gas emissions, highlighting the role of fertilizers, irrigation and renewable energy in building a more sustainable and competitive fruit sector.
