Abstract:

To study the inhibitory activity on plant eumycete in vitro of spearmint oil, which was extracted by steam distillation method and prepared to different concentration. 3 kinds of plant eumycete —— Helminthosporium turcicum, Botrytis cinerea and Phytophthora capsici were chosen for test by using double dilution of test tube method. Result: Spearmint oil exhibited some inhibitory activity on Helminthosporium turcicum at 24th hour. But the activities weaken and vanished at the 36th hour and the 48th hour. It exhibited fine inhibitory activity against Botrytis cinerea. It also exhibited little inhibitory activity on Phytophthora capsici. Conclusion: Spearmint oil exhibited fine inhibitory activity against some plant eumycete.