Carbosulfan Absorption by Polianthes tuberosa L. Bulbs and its Effect on Root-Knot Nematode, Meloidogyne incognita

Carbosulfan 25EC was evaluated as seed soaking for management of root-knot nematode, Meloidogyne incognita infecting bulbs of tuberose. Soaking of tuberose bulbs was done in 500, 1000 and 2000 μg/ml of carbosulfan 25EC for 2 and 4 h of exposure. Absorption of carbosulfan by tuberose bulbs, evaluated by high pressure liquid chromatography (HPLC), ranged from 5.25 μg/ml to 35.44 μg/ml. With the increase in the time of exposure or the concentration of nematicide there was Corresponding increase in incorporation of nematicide in the bulb tissues. Hatching from root-knot nematode, M. incognita eggs was reduced significantly by carbosulfan treatment at all the tested concentration (5-35 ug/ml). Penetration of juveniles, treated with 5-35 ug/ml concentration of carbosulfan, reduced by 41.44 to 85.51%. Reduction of 75.93 to 81.04% in the total number of nematodes in tuberose bulbs was recorded with soaking in 2000 μg/ml concentration of carbosulfan.