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
13 Oct 2025
The use of active packaging in Chilean fresh fruit exports—cherries, grapes and blueberries—helps reduce waste, preserve quality and extend shelf life during long shipments. An innovative technology that boosts sustainability and global market competitiveness.
21 Apr 2026
Drosophila suzukii is a major invasive pest of soft fruits, causing significant economic losses. A study evaluates sterile insect technique, viral biocontrol and RNAi, assessing effectiveness, limits and future perspectives for sustainable pest management strategies.
14 May 2026
The Cereza del Jerte PDO is focusing on quality, traceability and new varieties to strengthen exports and its presence in global markets. After nearly 2,000 certified tonnes last season, the 2026 fruit promises excellent flavour, more visibility and higher certified volumes.
14 May 2026
Early cherries in Chile are entering a decisive phase: being first on the market is no longer enough. Growers need consistent quality, production stability, agronomic precision and targeted commercial strategies to turn volumes into value and compete in the Chinese market.
