You are now on the AHDB Horticulture and Potatoes website.
Please click here to access the main AHDB website and other sectors.
Please click here to access the main AHDB website and other sectors.
How to register to use our onion downy mildew predictor tool
The AHDB Horticulture Crop Walkers’ Guide for UK Alliums has been designed specifically as an aid to crop monitoring. It illustrates and describes the important pests, diseases, nutritional and physiological disorders which may be encountered during the crop production process.