S. N. Phukan
Abstract
A survey of the major potato diseases in the district of Lakhimpur, Assam, revealed the occurrence of late blight caused by Phytophthora infestans, early blight caused by Alternaria solani and black wart caused by Synchitriurn endobioticum in the potato crops of four different cultivars. Late blight disease was the most dominant and caused extensive damage to the crop. Climatic condition influences the disease development to a great extent. In a conducive environment, late blight disease develops even in the resistant varieties of the crop. Disease intensity was significantly low in the cultivar Kufri-Iyotz. Altprnarin snlani, Svnehitriurn endoinoticum.