Strawberries grown outdoors in Northern Europe are highly susceptible to grey mould and powdery mildew, two fungal diseases that can cause significant yield losses. For decades, growers have relied on routine fungicide applications, leading to fungicide resistance and increased pesticide residues in berries.
New weather-based warning systems provide a more targeted approach by predicting grey mould infection risks 48-76 hours in advance. This allows growers to apply treatments only when necessary and avoid unnecessary spraying during low-risk periods.
The system was tested by around 20 growers, who reported positive experiences. The warnings helped identify periods of infection risk while also providing reassurance when spraying was not needed. Although the powdery mildew warning system is still being refined, it has already shown promise in supporting disease management decisions.
When used correctly, these warning systems can reduce production costs, save time, and lower pesticide use while maintaining yields and supporting more sustainable strawberry production.
