The treatments comprised of soil treatment with organic manures and foliar spray (thrice) of Pseudomonas fluorescens. Soil treatment with neem cake, cow dung and poultry manure in combination along with 3 foliar spray (FS) of P. fluorescens isolate-2 (Pfk-2) was most effective against early blight of potato showing maximum plant height at 30, 65 and 90 DAS (25.77cm, 45.43cm & 54.17cm) and minimum disease intensity at 50, 60, 75 and 90 DAS (12.5%, 15.4%, 20.23% & 23.0%) and producing heighest yield (296.83 q/ha) followed by application of neem cake, FYM and FS of P. fluorescens showing maximum plant height (21.67cm, 42.63cm & 52.07cm) minimum disease intensity (16.0%, 19.5%, 24.8% & 27.5%) and yield (274.73 q/ha), respectively. It was observed that soil treatment with neem cake, cow dung and poultry manure in combination along with 3 foliar spray of P. fluorescens was significantly superior as compared to other treatments. Thus, soil application of organic manure in combination along with foliar spray of P. fluorescens can become a part in integrated management of early blight of potato.
Alternaria solani, Cow dung, Pseudomonas fluorescens, Solanum tuberosum.
