Effect of different sources and levels of nitrogen on the incidence of root-knot of betelvine (Piper betle L.)

Efficacy of different sources and levels of nitrogen in the control of root-knot nematode on betelvine cv. Godibangla and their effect on plant growth parameters were studied. Among the four sources of nitrogen e.g., urea, urea + FYM, neem cake and FYM, neem cake proved to be most effective in reducing nematode infestation in soil and root and also increasing the growth attributes governing yield of betelvine. Of the four levels of nitrogen, application of 200 kg of neem cake demonstrated to be the best in decreasing the root-knot disease incidence and boosting up growth of betelvine.