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
07 Aug 2025
Large-caliber cherries are shaped by three critical growth stages: cell proliferation, pit hardening, and final expansion. Genetics and physiology work together to determine the fruit’s size, sweetness, firmness, and premium quality for the most demanding markets.
25 Jun 2024
As of 1 June, 2024 production was estimated at 37,000 tonnes, an increase of 10% over the previous year and 21% over the average harvest from 2019 to 2023. The start of the campaign is in line with last year, with bad weather reducing the market supply.
14 Jan 2026
Washington State University introduces R19, a new sweet and early cherry variety with premium traits for growers and consumers. Part of the WSU cherry breeding program, R19 aims to improve the start of the cherry season in the U.S. Pacific Northwest.
14 Jan 2026
Tart cherry juice is rich in antioxidants and bioactive compounds that help reduce inflammation, improve metabolic health, and influence gene expression. Recent studies highlight its potential in preventing cardiovascular and metabolic diseases.
