EVALUATION OF NEWER FUNGICIDES AGAINST ALTERNARIA LEAF SPOT OF BRINJAL

The present investigation was taken into consideration for the management of Alternaria leaf spot of brinjal by using newer fungicides were evaluated for their efficacy under in-vitro and in-vivo against Alternaria alternata causing leaf spot disease.In laboratory study among different fungicides, lowest colony diameter of 5.0 mm and highest colony growth inhibition over control of 94.42 per cent was recorded in Kasugamycin plus Copper oxychloride (0.15%) followed by Mancozeb (0.2%), which recorded colony diameter of 7.3 mm and inhibition over control of 91.86%.In-vivo evaluation of newer fungicides against leaf spot of brinjal, two sprays of Kasugamycin plus Copper oxychloride (0.15%) gave lowest percent disease Index (PDI) (9.70%),This treatment also recorded per cent disease control of 77.9 per cent, highest fruit yield of 310.33 q/ha and increase in yield over control of 47.0 per cent followed by two sprays of Mancozeb, recorded PDI of 12.1 per cent and per cent disease control over control of 72.4 per cent, fruit yield of 303.33 q/ha and increase in yield over control of 43.7 per cent.Highest B:C ratio of 1:18.53 was recorded in plots having two sprays of Mancozeb was given followed by two sprays of Kasugamycin plus Copper oxychloride (1:11.1).