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
10 Feb 2026
Low temperature storage extends the shelf life of sweet cherries but may induce pulp lignification. A study on the Meizao cultivar examines structural, biochemical and molecular changes affecting fruit firmness, texture, quality and consumer acceptance during post-harvest storage
27 May 2025
A study by the Universities of Zadar and Zagreb explores the effects of Azospirillum brasilense on cherry trees cv. Lapins grafted on various rootstocks. Results show improvements in growth, foliar nutrients, and soil conductivity under nursery production conditions.
11 Aug 2026
Thermosonication improves postharvest storage of sweet cherries by reducing decay, weight loss and oxidation. The treatment preserves firmness, vitamin C and flavonoids, while strengthening antioxidant defenses and maintaining fruit quality for 12 days at 4 °C.
11 Aug 2026
The Jerte Cherry PDO closes a very positive season, with 5 million kg of cherries and 2.5 million kg of certified picota. High quality, new varieties and strong European sales reinforce the value and identity of the local cherry supply chain, protected by the Jerte PDO.
