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
05 Aug 2025
China’s cherry production is expected to hit 900K tons (+6%) in 2025/26, with record imports of 600K tons. Expanding acreage, new varieties and Chile’s dominance consolidate China’s status as the world’s leading and most influential cherry market for global trade.
22 Oct 2025
Chile’s cherry industry keeps expanding with exports driven by China, but growers face critical threats: fruit cracking, unstable weather and billion-dollar losses. Producers and startups rely on integrated orchard strategies and biotech innovation to secure quality and competiti
18 Aug 2026
A study on 0900 Ziraat cherries evaluates indirect solar drying under different ventilation settings. Using one fan shortens drying time, preserves good color quality and provides the best technological balance between energy consumption, efficiency and sustainability.
18 Aug 2026
Mechanical harvesting of sour cherries is seeing very strong demand, driven by labor shortages. Stable service rates, fully booked schedules, storms, high temperatures and fears of an early halt to fruit purchases by processors are shaping the final stage of the season.
