Management of nematodes in bidi tobacco nursery by inimical plants

An investigation was carried out to test the efficacy of various inimical plants as green manure viz. sunnhemp, periwinkle and french marigold in the management of stunt, root-knot and reniform nematodes in bidi tobacco nursery. Sebufos @ 5kgha and soil solarization with clear LLDPE plastic of 25 pm for 15days during summer were also tested singly as well as in combination with inimical plants alongwith appropriate control. Rabbing with bajra husk @ 7 kglsqm., the standard practice, was also included. Bidi tobacco cv. Anand 119 was seeded @ 5 kgha in experimental area. Pooled results for 3years revealed that all treatments reduced the nematode population at seedling over control. Root-knot disease was significantly reduced till 63 DAS in the treatments of sebufos alone and its combinations with sunnhemp or marigold and in green manuring of sunnhemp followed by soil solarization. Economics worked out for two times green manuring with sunnhemp (seeding in September and February) followed by soil solarization gave an ICBR of 1:47 and the said treatment increased transplants by 113%, reduced root-knot disease, nema population at seeding and weeds by 75,91 and 650h, respectively over contol.