EFFECT OF BAU-BIOFUNGICIDE AND PLANT EXTRACTS AGAINST ROOT-KNOT (Meloidogyne javanica) OF OKRA c

Abstract

Five treatments viz. BAU-Biofungicide (Trichoderma spp.), Bermuda grass (Cynodon dactylon), Water spinach (Ipomoea aquatica) and Ivy leaf morninglory (Ipomoea hederacea) extracts in standard concentration with a control were tested against root-knot of Okra caused by Meloidogyne javanica followed in seed treatment and soil drenching methods. Among the treatments, BAU-Biofungicide and Bermuda grass leaf extract (S) gave superior result as it had increased length of shoot and root, weight of shoot and root, number of fruit and weight of fruit per plant correspondingly with the lowest galling incidence in Okra in all methods. Better effect on plant growth characters with lower galling incidence and development of the nematode was observed with Water spinach extract (S) and Ivy leaf morninglory extract (S) compared to control. Lower effect of plant growth character was found with extract (S) of Ivy leaf morninglory followed by Water spinach leaf extract (S). Negative correlations between number of galls with length of shoot and root, weight of shoot and root and number of fruit and weight of fruit under different treatments indicated the superior effect of the treatments as envisaged with the lower galling incidence and the suppressive activities of the nematode.