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
31 Jul 2024
"We have designed a liquid formulation highly concentrated in high quality pollen - explains Rodrigo Martínez, CEO of BioPollen Solutions - We are currently using drones, helicopters and aeroplanes, which allow us to apply a 200-hectare field in just a few minutes".
09 Sep 2025
A three-year study in the Czech Republic on 35 cherry genotypes shows how firmness, genotype and storage conditions affect surface pitting resistance. Results confirm the key role of ULO storage and preventive treatments to safeguard cherry quality and shelf life.
16 Dec 2025
Una ricerca guidata dalla Washington State University propone un nuovo metodo scientifico per misurare la consistenza delle ciliegie, superando i limiti della compressione tradizionale. Obiettivo: offrire all’industria cerasicola strumenti tecnici e predittivi più efficaci.
16 Dec 2025
On December 5, the first Cherry Express shipment of the 2025/26 season arrived at Nansha Port: 8,000 tonnes of fresh Chilean cherries were distributed within two hours thanks to an optimized cold logistics chain. China officially enters peak cherry season.
