Abstract:
Effect of leaf powder of vilayati mehdi (Clerodendron inerme L.), pink and white flower periwinkle (Catharanthus roseus (L.) G.Don.) and Azolla (Azolla pinnata R.Br.) for the control of root-knot nematodes (Meloidogyne incognita and M. javanica) on okra in nematode infested soil was studied during 1986-88. The substrates were used @ 25 g/metre row (560 kg/ha) under the crop row a day or two prior to okra seeding. Application of lead powder of Clerodendron, pink and white flower periwinkle significantly increased plant height and fresh root weight by 63.6, 63.6, 67.6 and 90.3, 75.0 and 73.0% with significant reduction in root knot disease by 33.2, 28.7 and 30.8% respectively over control.
