Downy mildew
Common Name
Scientific Name
Peronospora parasitica
Issue
Fungal
Causes
Downy mildew disease is favoured by cool, moist conditions and dispersed by wind and rain splash
Prevention
Use certified disease- free seed and hot water treat the seed. Do not water seedlings in the morning when spores are released and keep seedlings as dry as possible. Maintain a balance program of nutrition. Ensure enough potash. Maintain a well-ventilated
Control
Remove heavily infected seedlings and weedy crucifier seeds. Plough in field crop debris immediately after harvest and use a crop rotation of two to three years if possible.