Effect of Compost on Root-knot Nematode (Meloidogyne spp.) and Rhizobium Nodulation of Cowpea (Vigna unguiculata L. Walp)

Cowpea (Vigna unguiculata L. Walp) is an ancient crop widely known as Lobia, Vegetable crop, Black-eyed peas. used pulse, fodder, vegetable, and green manure crop. It to suffer from many diseases pests. Nematodes cause a severe damage cowpea production leading economic losses. Among the nematodes, root-knot nematodes (Meloidogyne spp.) Farmyard manure, spent mushroom compost, leaf waste of marigold, neem, lantana, rose, berseem drumstick were tested under field conditions during Rabi 2020-2021 for their efficacy against root knot growth parameters. Field experiment was carried out in randomized block design (RBD) with six treatments four replications. botanicals amendment, treatment T6- farmyard @ 8t/ha + compost significantly increased plant height at 60 DAS (85.91 cm), shoot weight (111.37gm), length (17.31 (3.37 gm), rhizobium nodules (26) decreased number knots system (41). Root reduced due less roots compared other amendment control T0.