Abstract: Antifungal components, which isolated from ethanol extract of Juniperus chinensis cv. Kaizuca with ethyl acetate, were tested against Valsa mali, Coniothyrium diplodiella, and so on, based on bioassay-guided mehtod. The results showed that ethyl acetate extracts of J. chinensis had certain inhibition effects to all tested fungi, and the best inhibition rates against V. mali and C. diplodiella were 83.06% and 78.87% at 2 mg/mL, respectively. The EC50 of the active component Savinin against V. mali, C. diplodiella, Fusarium graminearum, Elsinoe ampelina, Physalospora nasei and Fusarium oxysporum were 0.38, 0.18, 0.47, 0.59, 0.70, and 1.94 mg/mL, respectively.

Key words: Juniperus chinensis cv. Kaizuca, antifungal activity, column chromatography, savinin