Compatible bioagents to enhance efficacy against Sclerotinia sclerotiorum Bora Munmi*, Das B C, Borah Tasvina R, Duarah Dorodi Priyom, Helim Rizwanul Krishi Vigyan Kendra, Kamrup, AAU, Kahikuchi Campus, Guwahati-781017 *Corresponding Author's Email: munmi4u@gmail.com
Online published on 28 March, 2024. Abstract Sustainable crop production systems require phytopathogens to be managed effectively with the use of microorganisms. In recent years major thrust is given on other alternative methods including biological control with the inclusion of ecologically well-adopted, bio agents, which is environment-friendly and also curtail the hazards of intensive use of toxic materials and add as a major component of modern integrated disease management strategy. The concept of developing microbial consortia for bio-control relies on the fact that bioagents under natural habitats live in communities with some benefits for plants. Attempts were made to evaluate the relative compatibility of Trichoderma harzianum with a few other commonly used soil antagonists viz. Trichoderma harzianum, Trichoderma koningii, Trichoderma viride, Aspergillus terreus, Aspergillus flavus and Gliocladium virens by dual culture technique. The most compatible antagonist was found to be G. virens with T. harzianum followed by T. koningii, T. viride and A. flavus. The radial growth of T. harzianum was more as compared to other soil antagonists on dual culture assay except in case of T. harzianum and A. terreus where the A. terreus was seen to suppress the growth of T. harzianum. The best pair of compatible antagonists was found to be T. harzianum -G. virens. Under pot condition, dual application of bioagents- T.harzianum and G. virens showed significant reduction in percent disease incidence and greater efficacy in increasing plant height, dry weight of root, shoot and crop yield as compared to the control. Top Keywords Bioagents, Trichoderma harzianum, Gliocladium virens, White mold, French bean. Top |