Spotted Wing Drosophila, a well-known pest that infests ripe, ready-to-eat fruit, poses a significant threat to farmers because it is very difficult to control with standard pesticides. A new approach to tackling this pest involves manipulating the behavior of these insects by disguising healthy fruit as if it were infected with an unappealing pathogen.
By studying the specific odors emitted by infected fruit, researchers have identified the chemicals that repel the flies when applied to healthy fruit and are developing a slow-release device to disperse these fruity odors in the field, ensuring that they do not come into direct contact with the fruit. This method provides a new tool to help farmers protect their crops without relying exclusively on insecticides.
World supply rose from 1.85 to 2.75 million tonnes from 2008 to 2022, an increase of about 50%. The geography of world supply has not changed substantially over the past 15 years, although a concentration in a few countries can be observed.
'Thanks to the early blossoming this year, the harvest is particularly early,' explains Claus Schliecker, president of Landvolk Niedersachsen. He and his colleagues invest around EUR 120,000 per hectare to cover the cherry trees with rain covers and insect nets.
Rain, cold and low sunlight are complicating the cherry season in Chile. Walter Masman warns of risks to fruit quality and harvest. For Santina, further rain could cause losses of 15–20%: a hypothetical scenario that depends on weather forecasts over the next few weeks.
Drosophila suzukii can infest healthy fruit, compromising quality and marketability. Timely treatments, monitoring, orchard sanitation and insecticide rotation help limit damage during harvest and reduce the risk of resistance. Learn when to start control measures.