In California, Drosophila suzukii, known as SWD, is developing increasing resistance to insecticides. This insect has become a problem for cherry, sugar cane and strawberry growers since its arrival in 2008, spreading to other states in the USA, Mexico and Europe.
SWD females, thanks to their serrated ovipositor, can even lay their eggs in hard-skinned fruits, damaging them. This leads to increased susceptibility to insects and diseases, as pointed out by the University of Minnesota Extension.
Entomologist Jhalindra Rijal conducted studies on SWD in cherries and revealed that resistance problems developed rapidly. Management practices based on spinosin, pyrethroids and malathion contributed to this resistance due to the limited use of active ingredients.
The inability to vary active ingredients has led to increasing resistance among SWD populations, not only in California but also in other regions of the US, such as Georgia and Michigan, which have experienced similar problems. Scientific studies have shown a significant decrease in the susceptibility of SWD adults to various insecticides, resulting in lower than expected mortality. Spinosad resistance has been widespread on the Central Coast.
Fonte: Farm Progress
Foto: Italian Berry
11 Nov 2024
Pathogenicity tests showed that all isolated species could cause fruit infections, though with varying levels of aggressiveness. Among them, Diaporthe eres displayed the highest virulence followed by Fusarium incarnatum and Botryosphaeria dothidea.
04 Apr 2024
Cherry Growers Australia partnered with Agriculture Victoria in 2022-23 on an innovative project to develop on-farm traceability and build, diversify and protect exports by developing traceability from producer to consumer.
16 Feb 2026
Drosophila suzukii threatens soft fruit production in Africa. Research on Metarhizium anisopliae highlights the strong performance of isolate ICIPE 78, showing rapid mortality, horizontal transmission and fly attraction, offering sustainable pest control strategies.
13 Feb 2026
A joint study by Turkish institutes and the Islamia University of Bahawalpur (Pakistan) compares three sweet cherry drying technologies: MWD, MWHAD and Solar Tunnel Drying. Drying time, color, sugars, organic acids and phenolic compounds were evaluated for quality.
