Department of Plant Pathology, Punjab Agricultural University, Ludhiana-141004
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
Efficacy of new fungicides viz., Fluopyram and Tebuconazole alone, as mixture (Fluopyram 200 + Tebuconazole 200–400) as foliar sprays was compared with recommended fungicide Bavistin (0.1%) in controlling anthracnose, powdery mildew and cercospora leaf spot of grapevine on bower system of vine training. Three sprays were initiated after the first shower of rain in the month of July applied at 15 days interval. The data on disease severity recorded in the second week of October revelaed mixture of Fluopyram 200+ Tebuconazole 200–400@ 0.075 and 0.15 per cent proved most effective in controlling both anthracnose and cercospora leaf spot of grapes as compared to Fluopyram and Tebuconazole alone and Bavistin (0.1%). On one year nursery plants mixture of Fluopyram 200+ Tebuconazole200-400 @0.075 per cent and Score (tebuconazole) @ 0.1 per cent proved most effective in controlling anthracnose and cercospora leaf spot with respective disease severity values of 16.3 and 9.0 per cent and 5.3 and 5.0 per cent respectively as compared to 90.0 and 40.6 per cent in untreated control. Score @ 0.1 per cent in alternation with Bordeaux mixture 0.8 per cent also proved effective in controlling the disease. Fluopyram, Tebuconazole alone and both in mixture also proved effective in controlling powdery mildew of grapes. Fluopyram 200+ Tebuconazole200-400 @ 0.075 per cent and Tebuconazole @ 0.06 per cent completely checked the powdery mildew development on leaves of grapevine over untreated control. Fluopyram@ 0.03 per cent recorded disease severity of 5.0 per cent.
