Efficacy of Antibiotics and Biorational Pesticides against Bacterial Blight of Paddy

Abstract

In rice, streptocycline at 1000 ppm was effective against bacterial blight under in vitro evaluation, with maximum inhibition zone (25.0mm), followed by streptocycline + Copper sulphate 1000 ppm (24.33mm). Under field studies, streptocycline + copper oxychloride was found best with least per cent disease index. Highest grain yield returns were recorded in streptocycline + copper oxychloride treatment @ 0.025 % + 0.1 per cent followed by bactrinashak @ 0.04 and 0.03 per cent.