Pandey, R. 2000. Additive effect of three organic materials and nematicides on the reproduction of Meloidogyne incognita and yield of Mentha arvensis. Nematropica 30:154-160. Greenhouse trials were conducted to determine the influence of three organic materials and two nematicides on reproduction of Meloidogyne incognita and yield of Mentha arvensis . Maximum reduction in M. incognita populations occurred at high doses of neem cake (Reproduction factor (Rf) = 0.64) followed by Adhatoda vasica Nees leaf powder (Rf = 0.99 to 1.40), aldicarb (Rf = 1.58), medium dose of neem cake (Rf = 1.70), carbofuran (Rf = 2.45), bavistin (Rf -- 3.38) and powdered leaf of Murraya koenigii (L.) Spreng (Rf = 3.71, 3.37), respectively. Maximum oil yield of menthol mint cv. Hy-77 was obtained in neem cake treated soil followed by powdered leaves of A. vasica, M koenigii, aldicarb, carbofuran and bavistin. Similar results were recorded with dry root and shoot weights of the plant. A phytotoxic effect of hi
