Abstract
The root-rot or wilt of Coleus forskohlii is a very serious soil-borne disease caused by Fusarium chlamydosporum. A field study was undertaken to study the possibility of controlling the disease using three biocontrol agents viz., Glomus mosseae, Pseudomonas fluorescens, Trichoderma viride, singly and in combination. Planting of coleus cutting was done in wilt sick soil. Inoculation with Trichoderma viride + Glomus mosseae gave the best result in controlling the disease. The same treatment also resulted in maximum growth, yield and root forskolin concentration of coleus. Plants treated with T. viride + G. mosseae showed a disease severity index of 33.28% compared to uninoculated control plants, which had a maximum disease severity index of 85.5%. The fungicide Emisan (0.2%) was not as effective as the biocontrol agents in controlling the pathogen.
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