Sclerotinia disease affects the production of rapeseed seriously. As a result, the breeding and application of varieties resistant to S.Sclerotiorum has attracted increasing attention of the researchers. Some primary studies were made about physiological and biochemical change at seedling and adult plant stage with 5 resistant and susceptible varieties, hoping to supply some proof for resistant disease breeding to rape seed. The results were described as follows:1 After infection by S. Sclerotiorum, the rap...