Development of Suitable Package Using Bio-fertilizers For Management of Late Blight of Potato Under Climate Change

Among the different packages of bio-fertilizers, soil application of mustard cake + tuber treatment + foliar spray with T. viride was found best in stimulating germination and increase plant height of potato at different days after sowing, representing the value of emergence of seedling at 12 days after sowing against 21 days in case of control. Similarly, plant height of potato was also found maximum in treatment T-7 (soil application of mustard cake + tuber treatment and foliar spray with T viride) with the value of 0.39, 1.94, 3.57, 5.71, 8.00 and 10.26 cm against 0.0, 0.01, 0.31, 1.47, 3.17 and 5.35 cm at 5, 10, 15, 20, 25, and 30 days age of plant, starting after 12 days of sowing. The impact of the package bio-fertilizers have also able to decline late blight severity from 96.00 - 1.30 per cent in susceptible variety Kufri sindhuri. Biochemical analysis of plants have revealed that all the treatments significantly increased the soluble protein and total phenol content as compared to control at 5, 10 and 15 days after pathogen inoculation. Among the treatment, maximum amount of soluble protein and total phenol was found in case of T7 (soil application of mustard cake + tuber treatment and foliar spray with T viride) treatment, representing the value 30.38, 33.17, 32.41 and 2.10, 2.35 and 2.25 mg/g of fresh leave at 5, 10 and 15 days of pathogen inoculation. Correlation coefficient and regression equation revealed that negative correlation between disease severity and soluble protein and also between diseased severity and total phenol content as indicating (r) - 0.5224, -0.5842 and -0.5486 and -0.5360, -0.5656 and -0.3225 at 5, 10, 15 days of inoculation.