Ring spot

Caused by: Mycosphaerella brassicicola
Problem Category: Viral disease
Symptoms: Small, purple spots surrounded by a ring of water-soaked tissue on leaves which mature to brown spots with olive green borders 1-2 cm across; spots may develop numerous fruiting bodies which give them a black appearance or develop a concentric pattern; heavily infected leaves may dry up and curl inwards
Comments: Ring spot requires cool, moist conditions to survive; disease symptoms typically develop in the fall and the peak of the infection occurs in winter
Management: Refrain from planting in areas known to have had disease previously; rotate crop to non-brassicas; sanitize tools and equipment regularly; apply appropriate fungicide if disease is identified in crop
Control: Spray 5% cow urine + asafoetida solution to control Ring spot
SKU: 1408 Category: Tags: ,