BIOLOGICAL-CONTROL OF HETERODERA-CAJANI AND FUSARIUM-UDUM ON PIGEONPEA BY GLOMUS-MOSSEAE, TRICHODERMA-HARZIANUM, AND VERTICILLIUM-CHLAMYDOSPORIUM

Glomus mosseae, Trichoderma harzianum, and Verticillium chlamydosporiu m were used alone and in combination for the management of wilt diseas e complex of pigeonpea caused by the nematode Heterodera cajani and th e fungus Fusarium udum. Treatment of plants inoculated with pathogens increased plant length, shoot dry weight, number of nodules, and reduc ed nematode multiplication and wilting index. Simultaneous use of bioc ontrol agents against pathogens gave better control than their individ ual application. T. harzianum had an adverse effect on root colonizait on by G. mosseae. Parasitism of nematodes by V. chlamydosporium was al so reduced in the presence of T. harzianum. The highest reduction in n ematode multiplication was observed when all three biocontrol agents w ere used together.