Screening of Antagonistic Bacteria Against Botrytis cinerea and Identificationof Strain X-75 EMS mutagenesis in vitro and screening of calli from strawberry leaves of resistance to Botrytis cinerea Pers Effect of plucking flowers and bagging on the preventing and curing Botrytis cinerea Pers of cucumber Screening of Antagonistic Bacteria Against Botrytis cinerea and Identificationof Strain X-75