Physiological and biochemical characteristics of boscalid resistant isolates of Sclerotinia sclerotiorum from asparagus lettuce oleh Dong-ya SHI, Feng-jie LI, Zhi-hui ZHANG, Qiao-nan XU, Ying-ying CAO, Jane Ifunanya MBADIANYA, Xin LI, Jin WANG, Chang-jun CHEN