油葵菌核病是由子囊菌亚门核盘菌侵染引起的一种真菌病害。一般造成减产约４０％，严重的可造成颗粒无收。油葵菌核病病菌的菌核在土壤、病株残体及种子内越冬。土壤内菌核可存活７年以上，土壤内菌核产生子囊孢子随气流传播，直接侵入植株。在种子上越冬的病菌可直接危害幼苗 Sunflower sclerotinum is a fungal disease caused by the infection of Ascomycotina. Generally reduce the production of about 40%, can cause serious crop failure. Sclerotinia sclerotiorum bacteria sclerotia in the soil, diseased plants and winter seed. The soil sclerotia can survive more than 7 years, the soil ascosporogenous ascospores produced by the airborne spread directly invade the plant. The overwintering germs on the seeds can directly harm the seedlings