Ecology, Environment and Conservation Paper

Vol 29, Issue 1, 2023; Page No.(433-437)

IN VITRO EVALUATION OF NEW MOLECULES OF FUNGICIDESAGAINST COLLETOTRICHUM CAPSICI (SYD.) BUTLER ANDBISBY CAUSING ANTHRACNOSE OF CHILLI

K. N. Harshitha and M.G. Palakshappa

Abstract

Chilli (Capsicum annuum L.) is the fourth major vegetable cultivated globally. The major fungal foliar pathogencausing havoc in production, export and marketing is fruit rot or anthracnose of chilli causedby Colletotrichumcapsici (Syd.) Butler and Bisby which has emerged in impairing production in both tropical and subtropicalregions. In the present study, new molecules of contact, systemic and combi product fungicides were testedagainst Colletotrichum capsici by poison food technique at different concentrations. The contact fungicideswere tested at three concentrations (0.1, 0.2 and 0.3%) where, mancozeb 75% WP recorded 100 percentmycelial inhibition at all three concentrations. Among the systemic fungicides, propiconazole25% EC anddifenoconazole 25% EC showed 100 per cent mycelial inhibition at 0.025, 0.05 and 0.10 percent. Among thecombi product fungicides evaluated, metalaxyl 8% + mancozeb 64% WP showed 100 per cent inhibitionwhich was on par with tricyclazole 18% + mancozeb 62% (99.54 %). Whereas, lowest mycelial inhibitionwas in zineb 75% WP (30.14 %), hexaconazole 5% EC (66.11 %) and tebuconazole 50% + trifloxystrobin 25%(72.36 %) in contact, systemic and combi fungicides respectively. The overall results suggest that the systemicfungicides of triazole group are highly effective in inhibiting mycelial growth.