EFFECT OF PLANT EXTRACT AS NEMATICIDE AGAINST ROOT-KNOT (Meloidogyne javanica) OF CHILLI

Abstract

The standard (S) and half-standard (S/2) leaf extract of Bermuda grass, Water ! spinach, Ivy leaf morninglory, Nisinda, and Justicia were tested against root-knot of | chilli caused by Meloidogyne javanica in two sets of pot experiment after 10 and 18 | days of transplantation. Among the plant extracts, standard (S) extract of Bermuda | grass followed by Water spinach gave superior result as it had increased shoot and root length as well as fresh weight of shoot and root correspondingly with the lowest galling incidence and development of adult female, J, J3, and Jy juveniles of Meloidogyne javanica in chilli. Comparatively better effect on plant growth characters with lower galling incidence and development of the nematode was observed with standard (S) extract of Ivy leaf morninglory leaf followed by standard (S) extract of Nisinda leaf. Half-standard (S/2) extract of Bermuda grass also gave promising effect on plant growth characters with lower galling incidence and development of the nematode. Comparatively lower effect of plant growth character was found with half-standard (S/2) extract of Water spinach leaf followed by halfstandard (S/2) extract of Ivy leaf morninglory leaf. Half standard (S/2) extracts of Nisinda and Justicia leaf were also found effective compared to control. Negative correlations between gall numbers with shoot and root length as well as shoot and

root weight under different treatments indicated the superior effect of the treatment | as envisaged with the lower galling and the suppressive activities of the nematode.