Compatibility of Trichoderma spp. with Commonly Used Fungicides, Insecticides and Plant Extracts

Compatibility of indigenous Trichoderma viride (Tv-3), T. harzianum (Th-2) and T. piluliferum (Tp) was evaluated against fungicides, insecticides and plant extracts commonly used for crop protection. Of the five fungicides tested at 0.1 and 0.2 percent concentration, metalaxyl-M + mancozeb and mancozeb were compatible with growth of Trichoderma spp. while carbendazim, captan and propiconazole completely inhibited radial mycelial growth hence, where not compatible. Tv-3 show highest compatibility followed by Th-2 and Tp. Among insecticides evaluated at 0.1 and 0.2 percent concentration, imidacloprid showed little compatibility with isolates. But, chlorpyriphos, carbofuran and indoxacarb were highly incompatible. Th-2 has recorded highest compatibility with all treatments followed by Tp and least in Tv-3. Among botanicals, neem seedkernel extract(NSKE), Eucalyptus leaf extract and Pongamia leaf extract were compatible and nimbicidine and Prosophis leaf extract were inhibitory for growth of Tv-3 and Th-2. Prosophis leaf extract and NSKE were moderately compatible with Tp.