In vitro evaluation of bioagents against curry leaf spotcaused by Colletotrichum gloeosporioides (Penz.) Penz. and Sacc

Abstract

A total of four fungal and four bacterial bioagentswere evaluated against Colletotrichum gloeosporioides (Penz.)Penz and Sacc. causing curry leaf spotby following dual culture technique. Among the bioagents evaluated, commercialformulation of Trichoderma viride (84.71%) from Multiplex company and Trichoderma harzianum (81.18 %) fromInstitute of Organic Farming (IOF), UAS Dharwad were found to be effective in inhibiting mycelial growth of the pathogenand were found to be on par with each other. Trichoderma harzianum (76.86 %) from Department of Microbiology, UASRaichur, followed by commercially available Trichoderma harzianum (72.55 %). Bacterial bioagents were less effective ascompared to fungal bioagents. Among the bacterial bioagents evaluated, Pseudomonas fluorescens from IOF Dharwad(43.14 %) and Pseudomonas fluorescens (42.35 %) commercial formulation, have shown effective inhibition which aresignificantly superior and were found to be on par with each other. Least mycelial inhibition was recorded in commerciallyavailable Bacillus subtilis from IOF Dharwad (29.02 %) and Bacillus subtilis (26.27 %) and were on par with each other