摘要 : A field experiment was conducted to study the Effect of organic nutrient sources on late blight incidence and tuber yield of potato (Solanum tuberosum L.) in southern transitional zone of Karnataka during klwriflQ 15 at College of... 展开 A field experiment was conducted to study the Effect of organic nutrient sources on late blight incidence and tuber yield of potato (Solanum tuberosum L.) in southern transitional zone of Karnataka during klwriflQ 15 at College of Agriculture, Hassan.The experiment consisted of nine treatments with three replications laid out in RCBD design. At all the stages (30,45,60 and 75 DAS), late blight disease severity was significantly higher with application of 50 per cent RDM through FYM + 50 per cent RDNthrough vermi-compost, followed by 5 per cent bio-fuel oil cake foliar spray at 30,45 and 60 DAP(T_4). Significantly lower severity was recorded in treatment (T_1) with application of recommended dose of nutrients of 251 FYM ha~(-1) + 75:75:100 kg of NPK ha1. Application of recommended dose of nutrients (T,) of 25 t FYM ha~(-1) + 75:75:100 kg of NPK ha~(-1) registered significantly higher tuber weight (139.3 g plant~(-1)), tuber number (5.1 plant~(-1)), tuber yield (17.11 ha~(-1)) and also with respectto А, В, C and D grades (2.9,5.3, 5.00 and 3.81 ha~(-1), respectively). The highest total nutrient uptake was observed in T(: recommended dose of nutrients 251 FYM ha~(-1) + 75:75:100 kg of NPK ha~(-1) (102.8kg ha~(-1)). The higher B: C ratio (2.24) was recorded in the treatment with 50 per cent RDN through FYM + 50 per cent RDN through vermicompost, lbl lowed by panchagavya foliar spray at 30,45,60 DAP, closely followed by treatments viz., application of 50 per cent RDN through FYM + 50 percent RDNthrough vermicompost, followed byjeevamrutha foliar spray at 30,45,60 DAP and recommended dose of nutrients of251 FYM ha~(-1) + 75:75:100 kg of NPKha~(-1) (2.14 and 2.14, respectively). 收起