向日葵菌核病在黑龙江省发生分布及为害情况过去没有记载。我院于1960—1961年进行了调查研究,初步了解此病分布在尚志、讷河、嫩江等县部分地区,而且常年发病严重。其他如海伦、阿城、召东、召州等县,在个别年分也发生为害。根据嫩江九三农場1958年的调查,发病率一般在50％左右,1959年高达80％,个别地块颗粒无收。成为向日葵上的毁灭性病害。该病在向日葵整个生育期都能侵染为害,表现立枯和烂盘两个类型。立枯型自苗期开始到花盘形成前均能发病;幼苗期发病部位主要在茎基 Sunflower sclerotinia in Heilongjiang Province, the distribution and damage did not record the past. Our hospital from 1960 to 1961 conducted a survey and research, preliminary understanding of the disease distribution in Shangzhi, Nehe, Nenjiang and other counties in some areas, and perennial serious disease. Others such as Helen, Acheng, called East, called Zhou and other counties, in a few years also occurred harm. According to a 1958 survey of the Ninth Jiu San Farm, the incidence rate was generally around 50%, up to 80% in 1959, with no yield for individual plots. Become a devastating disease on sunflowers. The disease throughout the growth of sunflower can infest the damage, the performance of legislation and rotten disc two types. Li Kuang seedlings from the beginning to the formation of the disk can be pathogenesis; seedling stage of disease mainly in the stem base