Study on the Efficacy of Bioagents on Nodulation of Cowpea (Vigna unguiculata L. Walp)

The present investigation was carried out on cowpea variety IFC-901, to study the efficacy of doses of bioagents on nodulation of cowpea (Vigna unguiculata L. Walp) in pot condition consecutively for three years. In terms of nodulation status, the pooled data of three year revealed that all the treatments were significantly superior in increasing the nodules/plant as compared to control. Number of nodules was higher when the treatments were given with Trichoderma species. T. harzianum recorded the best results in increasing the number of nodules against M. phaseolina, R. solani and F. oxysporum infested plants. The study revealed that 15 g dose was most effective for all bioagents.