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

03 Nov 2023
1119

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

The super millionaire fruits of the Alma Mater

Varieties

16 May 2023

"The Alma Mater's super fruit millionaires": this is how Corriere della Sera headlined years ago when announcing the results obtained by researchers at the University of Bologna on the cherry tree genetic improvement project: the seven Sweet® sisters.

A physiological comparison between Prunus cerasus and Prunus avium

Varieties

06 Jun 2023

Prunus cerasus is generally considered a marginal species, especially in comparison with Prunus avium. However, in recent decades, this crop has become more important due to numerous studies on its positive effects on human health.

In evidenza

South African cherries on the rise: new varieties and innovative systems

Production

30 May 2025

In South Africa, sweet cherries are expanding thanks to low-chill varieties and innovative growing systems. Dutoit leads development with high-efficiency orchards, varietal research, and farming techniques tailored to the country's diverse microclimates.

Cherry exports to China: a promising but complex challenge for Jerte

Markets

30 May 2025

The opening of the Chinese market to Jerte cherries marks a new chapter for Spain's cherry sector, but brings complex export protocols. José Antonio Tierno stresses the need for caution, as past experiences with other fruits haven’t always delivered sustainable outcomes.

Tag Popolari