1Division of Plant Pathology, Central Potato Research Institute, Shimla-171001.
2Division of Plant Pathology, Central Institute of Cotton Research, Nagpur-440010.
When potato was taken in rotation with wheat or pea-wheat, the disease incidence was reduced from 37% (potato-potato) to 29.4 and 21.7% respectively, but the infection increased to 45% when potato followed pea only. Potato yield increased about 3 times when it followed pea, and decreased about 2½ times afler wheat. There was no difference in yield when potato followed pea-wheat or potato-pea-wheat with control (potato-potato) but disease incidence substantially reduced.
Soil treatment with Brassicol (75% PCNB) reduced the tuber infection to a great extent when healthy tubers were sown in infested soil. Use of healthy Agailol-3-treated tubers and soil amendment with saw dust or saw dust plus additional nitrogen did not reduce the disease incideoce.
