Reaction of turmeric genotypes against Colletotrichum capsici causing leaf spot and its management.
Twenty Turmeric geno types were tested, during kharif 2013 and 2014 for their reaction to Colletotrichum capsici under field conditions. Out of twenty genotypes evaluated, five geno types viz., Allampuram, Allepey supreme, IISR-Prabha, Kuchipuri and Tekurpeta showed resistant reaction and rest of them showed moderately resistant, moderately susceptible and susceptible reaction. Among 10 fungicides, 10 botanicals and 7 bioagents were evaluated in In vitro condition against Colletotrichum capsici, 0.1% propiconazole-25 EC, 0.1% hexaconazole-5EC, 0.1% thiophanate methyl-70WP, 0.1% tricyclazole-50WP, polyanthia longifolia (15%) and trichoderma harzianum recorded the maximum inhibition of mycelial growth of Colletotrichum capsici. The field evaluation of different fungicides and botanicals during kharif 2014 indicated that 0.1% propiconazole-25 EC was significantly effective in reducing the disease intensity by recording a PDI of 24.61 and fresh rhizome yield of 34.52 t/ha.0.1% hexaconazole-5 EC, 0.1% azoxystrobin-23EC, 0.1% tricyclazole-50WP, 0.2% mancozeb- 75WP, 0.1% thiophanate methy 70WP were next best treatments found effective in reducing the disease intensity by recording a PDI of 27.16, 28.12, 31.62, 33.91 and 34.12 and fresh rhizome yield of 33.91 t/ha,33.07 t/ha, 29.32 t/ha, 31.97 t/ha and 30.93 t/ha respectively. Again during Kharif-2015 indicated that 0.1% propiconazole-25 EC was significantly effective in reducing the disease intensity by recording a PDI of 24.50 and fresh rhizome yield of 33.99 t/ha. and similar trend was observed for other treatments also.