Existing and validated forecasting models for pests and diseases should be used and the use of adequate monitoring devices by groups of growers is recommended.
Cutworms: Populations should be monitored (e.g. sex pheromone traps and visual inspection) and forecasting models should be taken into account.
Leek moth: Flight periods should be monitored by sex pheromone traps and sprays applied according to thresholds.
Alternaria: Existing and validated forecasting models should be applied.