Vol. 9, Issue 10, Part A (2025)

The evaluation of fungicides/combination of fungicides, insecticides and herbicides with Trichoderma isolate-1 at different concentrations under in vitro using poisoned food technique. Among three fungicides tried, pyraclostrobin 13.3 + epoxiconazole 5 SE with 61.90 percent mycelial growth inhibition at 50 ppm concentrations respectively and proved significantly compatible over rest of the fungicide treatments. Whereas, the maximum mycelial growth inhibition was found in carbendazim 50 WP (94.51%) found incompatible with Trichoderma isolate-1. Among three promising insecticides tried, tetraniliprole 18.18 SC with 17.40, 25.94, 29.28 and 54.86 percent mycelial growth inhibition at 250, 500, 1000 and 1500 ppm concentrations respectively and proved significantly compatible over rest of the insecticide treatments. While, the maximum mycelial growth inhibition was found in quinalphos 25 EC (93.40%) found incompatible with Trichoderma isolate-1. Among three promising herbicides tried, imazamox 35 + imazethapyr 35 WG showed least mean mycelial growth inhibition (39.29%) at 50 ppm while, the maximum mycelial growth inhibition was found in quizalofop ethyl 10 EC (94.51%) found incompatible with Trichoderma isolate-1. The evaluation of agrochemicals with P. fluorescens isolate-6 at four different concentrations under in vitro condition using poisoned food technique. All nine agrochemicals completely inhibited the growth of P. fluorescens isolate-6 at all four different concentrations, showed an incompatible reaction with all the agrochemicals tested. The complete inhibition observed may be due either to the toxicity of the agrochemicals or to the sensitivity of P. fluorescens isolate-6.