近年来,青海省乐都县马铃薯黑胫病发生普遍,平均病田率达50%,平均病株率达16%,约有10%的地块严重缺苗断垄,缺苗率达20%以上。马铃薯黑胫病从种薯发芽至生长后期、储藏期均能发生,苗期最盛。该病发生后,常常造成缺苗断垄和生长期植株早死,发病严重的田块几乎绝收,给农民带来较大的经济损失。本县马铃薯生产实践和黑胫病防治工 In recent years, the occurrence of potato black shank in Ledu County of Qinghai Province is widespread with an average disease rate of 50% and an average diseased rate of 16%. About 10% the above. Potato black shank disease from seed to germination to late growth, storage period can occur, the most seedling stage. After the occurrence of the disease, often resulting in lack of seedlings broken ridge and growing plants premature death, the incidence of serious fields almost absolutely yield, bring greater economic losses to farmers. The county potato production practices and black shank prevention workers