Influence of four plant extracts on the hatching of Meloidogyne javanica and invasion of host roots

Abstract

Inhibition of Meloidogyne incognita juvenile hatch is reported to be caused by root-exudates of Euphorbia hirta (Yadav, 1970), Azadirachta indica (Alam e/ al., 1975) and aqueous leaf, stem and root extracts of Tagetes minuta (Toida, 1972). In a preliminary test, leaf extracts of 30 plant species were studied for their nematicidal effect on M. javanica juveniles (Nandal and Bhatti, 1983). Four weeds [Calotropis procera (Ait.) R. Br., Datura stramonium L., Ricinus communis L. and Xanthium strumarium L.] were found to be nematicidally effective and studied further. This paper reports the effect of leaf extracts on hatching, galling and life-cycle development in vitro of juveniles of Meloidogyne javanica (Treub.) Chitw,