Evaluation of Fungicide, Bio-agent and Plant Extract against Altenaria Leaf Spot of Turnip

Abstract

Alternaria brassicicola causes dark leaf spot disease on turnip crop. The pathogen was tested with 6 fungicide, 2 bio-agent and 4 plant extract under In-Vitro. In-Vivo condition 6 fungicides were tested the year of 2021-22 and 2022-23. Among the tested fungicide Hexaconazole 5% SC and Carbendazim 12%+ Mancozeb 63% WP was found most effective with fungal colony growth (00.00 mm) and per cent inhibition over control 100%. The maximum fungal colony growth (63.25mm) was recorded on onion extract with per cent inhibition over control (28.13). The next treatment was found significantly superior over control. In-Vivo condition the tested fungicide Hexaconazole was found most effective with (9.55) mean minimum disease incidence and maximum mean yield (24.36 ton/ha) followed by Carbendazim+Mancozeb which showed (13.34) mean disease incidence and (21.37 ton/ha) mean yield. Among the tested fungicides Sulphur was showed maximum (28.56) mean disease incidence with minimum mean yield (8.84 ton/ha).