Toxicity of water soluble leaf extracts against larvae and egg masses of three Meloidogyne species

The study on the effect of water-soluble leaf extracts of 11 plant species viz., Adhathoda vesica, Ageratum conyzoides, Argemone mexicana, Calotropis procera, Catharanthus roseus, Eucalyptus globulus, Euphorbia pilulifera, Leucas aspera, Ocimum canum, Synedrella nodiflora and Tagetes erecta on second stage juveniles and egg mases of Meloidogyne incognita, M. javanica and M. arenaria showed that Tagetes erecta and Eucalyptus at all dilutions were very effective in inhibiting egg hatch of the three species. Argemone, Ocimum against M. javanica and M. arenaria; and Ageratum, Leucas, Synedrella Catharanthus were effective against M. arenaria egg masses.

Total larval mortality of all species was observed in Euphorbia extract without revival on transfer to fresh water for 48 hours. Adhathoda and Tagetes were effective against M. incognita/M. arenaria larvae, Calotropis against M. javanica and M. arenaria, and Tagetes against M. javanica at 1:2 and 1:4 dilutions, and Calotropis and Catharanthus against M. incognita and M. arenaria larvae respectively at 1:2 dilution.