Resistance of Botrytis cinerea to fungicide pyrimethanil from Solanaceae vegetables in Zhejiang Province

Forty-eight strains of Botrytis cinerea Pers.isolated from Solanaceae vegetables in Ningbo,Jinhua,Jiaxing and etc.were evaluated by the method of mycelial growth inhibition for the resistance to fungicide pyrimethanil.The results demonstrated that the resistant strains to pyrimethanil has been found in Zhejiang Province,China,and the frequency for high,middle,and low resistance were 8.33%,4.17%,and 12.5%,respectively.Resistance to pyrimethanil for B.cinerea was stable after 10 successive subcultures in fungicide free media.There was no significant correlation between the mycelium growth and pyrimethanil-resistance or sensitivity.Strategies to avoid the further development and spread of B.cinerea with resistance to pyrimethanil fungicide were discussed.