MANAGEMENT OF ALTERNARIA LEAF BLIGHT OF RADISH SEED CROP BY SELECTED FUNGICIDIES

Abstract

In the field experiment with the radish (cultivar Rocki), seed plants were sprayed with Rovral 50 W. P. (50 % iprodione) @ 0.2%, Dithane M-45 (80% mancozeb) @ 0.3% and Shincar 50 W. P. (50% carbendazim) @ 0.1% to control the Alternaria leaf blight of radish. Two sprays of each fungicide were done at 7-days interval starting from 24 days after transplanting of 40 days old stickling. Among the fungicides sprayed, Rovral was the most effective in controlling the disease and significantly reduced the leaf area infection (76%), number of spot per leaf (76.81%) and number of infected leaf per plant (62.97%) over the control followed by Dithane M-45 and Shincar. The fungicide Rovral 50 W. P. also increased the seed yield (48.42%), yield per plant (59.55%) and 1000 seed weight (23.50%) over control.