Studies from California reveal some problems with insecticide resistance of Drosophila suzukii

03 Nov 2023
1010

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


Cherry Times - All rights reserved

What to read next

Climate, profitability and Chinese demand: focus on Chile in USDA report

Production

11 Sep 2024

The demand for Chilean cherries is high from the Chinese market, which receives over 91% of Chile’s cherry export volume. Post estimates that cherry production in marketing year (MY) 2024/25 will reach 500,000 metric tons (MT), an increase of 6.8% compared to MY2023/24.

Bacterial canker: symptoms, causes, and prevention in the sweet cherry tree during the fall season

Crop protection

11 Dec 2024

The most evident symptoms of bacterial canker in sweet cherry are a dark canker, often accompanied by gummosis. Symptoms commonly develop at the base of trees, particularly in younger trees, which are more susceptible to damage caused by machinery, rodents, frost, and irrigation.

In evidenza

Artificial intelligence improves cherry sorting: more quality and less waste

Post-harvest​

31 Mar 2025

Artificial intelligence is revolutionising cherry sorting, ensuring greater precision, reduced waste and higher quality. Find out how advanced technologies such as deep learning optimise packaging and improve productivity in the fruit and vegetable sector.

Successful Australian workshops on vigour management in the cherry tree

Press review

31 Mar 2025

Find out the results of workshops on cherry vigour management in Australia, with updates from Tasmania, Victoria, South Australia and NSW. International experts and innovations to optimise cultivation. Read more about winning techniques and strategies.

Tag Popolari