The surface of the infested tubers was black in color with cracks. The blackening extended further deep inside the tubers reducing the edible portion. The infested tubers were smaller in size.
In corms, the galls appear as irregular projections which harbor adult females and eggs.
Infested tubers were deformed and smaller.
Management
Treat seed material with talc-based formulation of Bacillus macerans (3 gram (10E6 CFU/g) per kg of corms).
Continuous cropping of a particular crop results in buildup of the nematodes in fi elds. Hence, crop rotation is essential.
