Notes on Raspberry Diseases
Orange rust of blackberry
Identification
Infected plants produce weak, spindly shoot growth with yellow misshapen
leaves in the spring. Leaves on these shoots develop bright orange pustules
on the lower surface. This disease only occurs on blackberries, black
raspberries and purple raspberries.
Orange rust on blackberry leaf
Management notes
Unlike most fungus diseases, orange rust is systemic in the plant.
To prevent spread of the disease, dig out and destroy infected plants
early in the spring before pustules break open.
Learn more...
