Influence of Meloidogyne incognita, Pratylenchus thornei and Tylenchorhynchus vulgaris on growth and oil yield of menthol mint

Greenhouse trial was conducted to determine the influence of 3 phytonematodes alone and in combination on growth / oil yield and reproduction potential of nematode species in menthol mint (Mentha arvensis L.) var. Kosi. Among the different treatments, alone inoculation of root-knot-nematode, Meloidgyne incognita and simultaneous with root lesion nematode, Pratylenchus thornei, resulted in maximum adverse effect on growth/oil yield of menthol mint. Stunt nematode, Tylenchorhynchus vulgaris, was suppressive of growth and yield of menthol mint. Maximum multiplication rate was recorded with M. incognita. P. thornei and T. vulgaris multiplied slowly on menthol mint.