Effect of some plant extracts on Meloidogyne incognita (Kofoid and White, 1919) chitwood, 1949 juvenile mortality

An experiment was carried out in vitro to test the efficacy of 7 plant extracts viz., leaf extracts of Tagetes erecta L., Azadirachta indica A. Juss., Calotropis gigantea Ait., seed extracts of Citrullus lanatus (Thunb.), Areca catechu L., latex of Carica papaya L., and C. gigantea on the juveniles of M. incognita. Leaf extract of C. gigantea (17.7%) and latex of C. gigantea (32.6%) were found to be the best at 0.1 and 1.0% concentrations respectively and latex of C. papaya recorded cent per cent juvenile mortality after 72 h of exposure both at 5.0 and 10.0% concentrations. At 10.0% concentration, seed extract of C. Ianatus and latex of C. gigantea caused cent per cent mortality after 72 and 120 h of exposure respectively.