Compatibility Assessment of Native Non-Rhizospheric Trichoderma Isolates with Various Fungicides

The native non-rhizosphere isolates of Trichoderma were tested against different systemic, contact and combi-product fungicides to test their compatibility. Total five isolates were tested against 16 different fungicides and compared with commercial Trichoderma isolate available in market. The native isolates showed good compatibility compared to commercial isolate. All the isolates showed high compatibility with Dimethomorph 50 % WP among systemic fungicides where least of 9.44 per cent mycelial inhibition was recorded in the isolate PSV. The systemic fungicides, Hexaconazole 4 % EC, Carbendazim 50 % WP and Thiophanate methyl 70 % WP were highly incompatible with all the Trichoderma isolates at all tested concentrations (100 % inhibition). All the native isolates recorded least of 22.74 per cent to highest of 35.63 per cent in case of contact fungicide, Copper Oxy Chloride 50 % WP (COC) and least of 26.98 to highest 38.66 per cent mycelial inhibition in the isolates SDKD and PSV, respectively in case of Mancozeb 75 % WP with 42.61 and 40.44 per cent inhibition in commercial isolate, respectively. The native isolates showed high incompatibility with Chlorothalonil 75 % WP (100 % inhibition at 1500 ppm). The native isolates showed good compatibility with Metalaxyl 4 %+ Mancozeb 64 % WP among combi-product fungicides with least of 50.12 per cent mycelial inhibition in case of PSV, while highest mycelial inhibition was recorded in commercial isolate 60.45 per cent. However, the native isolates showed cent per cent mycelial inhibition in combi-product fungicides Carbendazim 12 % + mancozeb 63 % and Carbendazim 25 % + Mancozeb 64 % WP. The native non-rhizosphere isolates were most superior than commercial isolates especially Trichoderma harzianum (PSV and GMV) which intended to study further.