Late blight caused by Phytophthora infestans (Mont.) de Bary has historically been a most serious disease of potatoes worldwide, including India. Due to differences in prevailing weather conditions, its severity varies from region to region. when tuber are planted first fort night of October disease initiated within 59 days, and there after the period for disease initiation decreases. | Effect of weather indices on late blight of potato and its management in Northern district of West Bengal India
