Effeective organic solvents extracting garlic(Allium sativum L.) were screened in the paper. Then in vitro and in vivo effect of garlic extract on several important pathogens in vegetables such as cucumber scab(Botrytis cinerea)、Cucumber gray mold(Cladosporium cucumerinum) and so on were tested systematically. After analysis and purification of inhibitory components in garlic extract, the paper discussed the mechanism of its interaction with pathogens. They included the target binding situation of inhibitor...