Notes on Current and Gooseberry Diseases
Powdery mildew

Identification

The fungus overwinters in infected twigs. It causes felt-like patches, initially white then turning brown, on the upper and lower leaf surface, shoots and fruits. Infected plants are often stunted and defoliated. Infected berries may become cracked. Powdery mildew is a limiting factor in black currant production where susceptible varieties are grown.

Management notes

There are few fungicides registered for control of mildew on currants at this time. Choose resistant varieties. See Table 8-14. Disease Ratings on Selected Currant and Gooseberry Varieties. Prune out infected twig tips in late fall. Avoid overfertilization with nitrogen.

Learn more...

• Notes on Current and Gooseberry Diseases and Insects
• OMAFRA Publication 360 Current and Gooseberry Calendar
• OMAFRA Publication 360 Fruit Production Recommendations
• OMAFRA Berry Crops Index page
  

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