Abstract:

In order to find out the occurrence and prevalent of potato diseases, the investigation of potato diseases was undertaken in potato producing areas in Guizhou from 2008 to 2010. 18 disease have been found on potato. 7 of them are fungous diseases and 4 of them are bacterial diseases and 4 of them are virus diseases and 1 of them is actinomyces and 2 of them is non-infectious diseases. Late blight, physiological leaf spot, early blight, PSV, bacterial wilt, anthracnose and physiological premature senescence were popular occurrence in Guizhou. However, late blight was most seriously disease on potato. The time and severity level of the occurrence and prevalent of potato diseases are determined by climate condition, variety and sowing date.