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
23 Apr 2025
Discover how volatile compounds from sour cherry fruits are changing the fight against Rhagoletis cerasi. A study in Lithuania identifies effective natural attractants for mass trapping—ideal for organic, sustainable fruit farming in Europe and North America.
20 May 2024
A 2023 consumer study that surveyed over 2,000 consumers found that the key factors continue to be quality and flavour. However, once the retail price reaches $4.50 per pound, sales begin to decline.
23 Feb 2026
In Patagonia, Frutos del Valle Patagónico produces up to 1 million kg of cherries per year, with 800,000 kg exported to China, the US and the Middle East. Quality, technology and expansion plans drive steady growth in a highly competitive global market dominated by Chile.
23 Feb 2026
South Africa’s cherry industry has quadrupled acreage from 2012 to 2024 and aims to double production within five years. Exports reach 37%, with a focus on 28 mm+ calibers and new markets such as China, amid growing climate and logistics challenges in global trade.
