Management of leaf crinkle disease in blackgram

Abstract

Leaf crinkle disease of blackgram was effectively managed employing combined treatments of heat therapy of seeds, seed treatment with imidacloprid 600 FS, spraying the crop with imidacloprid 17.8 SL and growing borders sorghum along. During Kharif 2011 and 2012, sorghum bordered experiment with treatment of heat therapy of seeds, seed treatment with imidacloprid 600 FS and spray with imidacloprid 17.8 SL at 25 days after sowing (DAS) (T6) recorded the least PDI and aphid population. In without border experiment during Kharif 2011, the least PDI recorded was 18.00 with 44.9 per cent reduction in disease over control and 0.8 aphids three leaves -1 plant-1 at 60 DAS. The least PDI recorded was 16.67 with 40.00 per cent reduction in disease control and 0.6 aphids three leaves-1 plant-1 at 60 DAS was recorded in blackgram border crop experiment and during Kharif 2012 The least PDI recorded was 20.33 with 42.45 per cent reduction in disease incidence over control and 0.6 aphids three leaves-1 plant-1 at 60 DAS in blackgram without border experiment, while in border crop experiment of blackgram, PDI recorded was 18.33 with 38.21 per cent reduction in disease incidence over control and 0.8 aphids three leaves-1 plant-1.