Efficacy of bio-rational fungicides against sheath blight of rice under subtropical conditions

摘要

Rice, the major cereal crop of India, is severely affected by sheath blight disease caused by Rhizoctonia solani Kuhn. Field losses due to this disease are reported to range from 5.2 to 50% depending on environmental conditions, crop stages at which the disease appears, cultivation practices and cultivars. With the increased use of dwarf and high yielding varieties, mono-cropping, intensive use of fertilizers, sheath blight is one of the most important biotic maladies of the country.