Effect of certain nematicides on the sex ratio of Meloldogyne incognita on tomato and Tylenchorhynchus brassicae on cauliflower
Abstract
Soil treatment with nematicides, DD, DBCP, phorate, fensulphothion, dime-thoate, aldicarb and carbofuran resulted in an increase in the number of males of Meloidogyne incognita on tomato and Tylenchorhorchus brassicae on cauliflower. The number of males in nematicidal treatments, increased with an increase in the inoculum density. The percentage of males of M. incognita was highest in treatments with DBCP and fensulphothion followed by DD and aldicarb and to certain extent in dimethoate. In T. brassicae, it was highest in DD at all levels of inoculum and in DBCP at highest inoculum level. Phorale, dimethoate and aldicarb increased males populalions at population levels of 1000 and 5000 respectively.
Keywords
Meloidogyne incognita, Tylenchorhynchus brassicac, Sex ratio of Nematodes