Studies on effectiveness of certain new fungicides in controlling stemphylium blight of onion seed crop

Stemphylium blight has become a very serious disease of onion causing losses both in bulb as well as seed crops. In addition to old recommended fungicides, now a number of new fungicides are also available in the market to control this disease. In order to achieve the effective control of this disease in seed crop, the present studies were undertaken during the cropping period (rabi season) of 201011 & 2011–12 in Ambala district of Haryana. Two years results obtained during the present studies revealed that Tebuconazole 25.9 EC, Propiconazole 25 EC and the combination of Carbendazim 12% + Mancozeb 63% (SAAF) appears to be promising alternatives to the conventional fungicides Mancozeb 75 WP and Copper oxychloride 50 WP for efficient management of stemphylium blight disease of onion seed crop.