马铃薯丝核菌病,也叫黑痣病、立枯病、茎基腐病。据调查,现已遍及乌盟各个乡村,一般田间发病率为10—30％,减产10—15％,是乌盟水旱地马铃薯缺苗断垄和生长不良的重要因素之一。但该病一直不被人们所重视,误认为是干旱肥料烧伤或昆虫为害,或其它病害。因此,很有必要阐述其病症及防治措施。一、病态 1、幼芽病态:播种后,感病幼芽迟迟不能出苗,芽端茎尖腐烂,而后又长出若干侧芽,一般都比较纤弱,严重时,侧芽同样腐烂坏死,造成缺苗断垄。 2、植株病态:患病植株地下 Rhizoctonia solani, also called mole disease, blight, stem rot. According to the survey, it has been spread to all villages in the Ulaanbaatar. The incidence rate in the field is 10-30% and the yield is reduced by 10-15%. It is one of the important factors for the lack of potato seedlings and the poor growth in the Uighur water and land drylands. However, the disease has not been valued by people and mistakenly thought to be a burn or insect damage to arid fertilizer or other diseases. Therefore, it is necessary to explain the symptoms and prevention measures. First, the pathological 1, sick buds: After sowing, the sick buds can not be delayed emergence, shoot tip decay, and then grow a number of lateral buds, are generally more delicate, serious, the same bud rot necrosis, resulting in lack of seedlings Broken ridge. 2, plant morbidity: diseased plants underground