1CSKHPKCV Research Sub Station, Akrot (Una)
CSKHPKV, HAREC, Dhaulakuan-173001
National Symposium on Strategic Issues in Plant Pathological Research held at Department of Plant Pathology, CSK HP Krishi Vishvavidayalaya, Palampur on November 24–25, 2011
Web blight caused by Rhizoctonia solani causes huge yield loses in urdbean (Vigna mungo). All the commercially grown varieties are susceptible so chemical management is the only alternative to manage the disease. In present study different fungicides were evaluated as foliar sprays during kharif season 2005, 2007–2010 using susceptible variety UL 338. Two foliar sprays of fungicides hexaconazole 5EC (Contaf 5EC) @ 0.1%, difenconazole 25EC (Score 25EC) @ 0.05%, carbendazim 50WP (Bavastin 50WP) @ 0.1% and propiconazole 25EC (Tilt 25EC) @ 0.1% significantly reduced the disease severity resulting in 81.1, 80.6, 65.9 and 76.2% control over unsprayed check with corresponding mean yield of 872, 821, 791 and 754 kg/ha compared with the mean yield of 584 kg/ha in unsprayed control. The net benefit for the two foliar sprays with these fungicides was Rs.6497, 3873, 4077 and 2444, respectively for the general crop (@Rs. 2900/q with the cost: benefit ratio of 4.5, 2.3, 3.1 and 2.0. In seed crop (Rs.6400/q), the net profit for foliar sprays was Rs.16577, 12168, 11322 and 8394, respectively with cost: benefit ratio of 9.9, 5.1, 6.9 and 4.4. The fungicides were effective in reducing the severity of powdery mildew and anthracnose at Dhaulakuan, in addition, the test fungicides were also effective against anthracnose and Cercospora leaf spot at RSS, Akrot.
