Identification of resistant sources and management of rice blast through fungicides
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Keywords:Blast, fungicides, incidence, Pyricularia grisea, resistance, rice
AbstractSurveys conducted during Kharif 2014 and 2015 in major Basmati rice growing areas of Haryana revealed that the neck blast (Pyricularia grisea) incidence ranged from traces to 20% in commercially grown Basmati varieties. The average disease incidence was highest in Basmati CSR 30 (1.20-2.12%) followed by Pusa Basmati 1121 (1.09-1.60%) while it was the lowest (traces) in Pusa Basmati 1509. Out of 88 scented genotypes, five genotypes viz. HKR 08-425, HKR 10-579, HKR 11-509, PAB 21-663 and Pusa 1485-06-8-10-5-15-11 showed consistent resistance to leaf blast under natural epiphytotic conditions of uniform blast nursery during kharif seasons 2014 and 2015. Amongst fungicides evaluated against neck blast, combination of tricyclazole 45% + hexaconazole 10% WG @ 1.0 g/l was found to be the most effective and statistically at par with standard fungicide tricyclazole @ 0.6 g/l in reducing the neck blast incidence and enhanced grain yield of paddy variety, Basmati CSR 30 followed by combination of tricyclazole 18% + mancozeb 62% @ 2.5 g/l.
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