Role of infested left out potatoes on the overwintering and dissemination of root-knot nematode, Meloidogyne incognita in field

The study conducted during 1991–92 and 1992–93 at Shimla showed that the left out tubers aided M. incognita in overwintering upto six months in the fields. The average total potential inoculuni/g infested tubers was 207.1 1eggs and juveniles which is considered to be significantly higher than the economic threshold level,. Further, the actual inoculum developed/g of infested tubers after 30 days of planting of such infested tubers declined to 96.03 and to 52.34 after sixty days of planting.