Comparative efficacy of chemicals, organic amendments and bioinoculants against Rhizoctonia solani on Mentha arvensis cv. Gomt

Studies were conducted under poly house to determine the comparative efficacy of chemicals viz, carbofuran and bavistin each @ 1mg a.i./kg soil, organic amendments viz. Azadirachta indica seed powder, A. indica cake each @ 50 mg/kg soil, Murraya koenigii leaves powder @ 500 mg/kg soil, and mint manure, farm yard manure each @ 1500 mg/kg soil; fungal bio-agents viz. Trichoderma harzianum, T. virens, Paecilomyces lilacinus, Aspergillus niger, and bacterial bio-agent viz. Pseudomonas fluorescens each @ 50 ml suspension (2 × 10⁸ spores/ml)/kg soil against Rhizoctonia solani on Mentha arvensis. All the treatments except F.Y.M., significantly improved the plant growth and oil yield of the plants as compared to untreated inoculated plants. Analysis of data showed that bavistin was most effective in improving growth, oil yield of the plants as well as in suppression of disease development, followed by A. indica seed powder, A. indica cake, T. harzianum, P. fluorescens and T. virens, respectively.