Disease controlling potential of Trichoderma harzianum and Trichoderma viride against purple blotch of onion

Abstract

Disease controlling potential of Trichoderma strains evaluated in vivo against purple blotch of onion. Ten Trichoderma strains were taken among which nine were Trichoderma harzianum and one Trichoderma viride. Trichoderma viride strain T18 was found to be more effective for promoting plant growth and controlling purple blotch disease under field conditions showing its competence not only in promoting growth but also controlling foliar incidence of purple blotch. Whereas, Trichoderma harzianum strain T3 and T5 were more effective in increasing bulb weight/plant.