Laboratory experiments were conducted to investigate the possible nematicidal effect of the four terpenes, carvacrol, geraniol, eugenol and thymol, against the stem and bulb nematode Ditylenchus dipsaci (Kühn, 1857) Filipjev, Proceedings of the Helminthological Society of Washington, 3, 80–82, 1936, isolated from infested garlic cloves. In in vitro tests the observed nematicidal activity of terpenes in descending order was carvacrol > eugenol > geraniol > thymol. Carvacrol exhibited the highest activity of 100% mortality when it was tested at the concentration of 2000 μl/L. No synergistic action was recorded when all four terpenes were used in mixture. In soil experiments thymol showed the highest nematicidal activity amongst all the other terpenes followed by carvacrol. Our results indicate that there is a positive correlation between the concentration and the exposure time. In addition, increasing the dose of each terpene increased paralysis rates of the nematode were recorded. These results strongly show the nematicidal activity of terpenes, but further studies are needed to ascertain their mode of action against nematodes.

进行了实验室实验，以研究香芹酚，香叶醇，丁香酚和丁香酚这四个萜烯对茎线虫Ditylenchus dipsaci（Kühn，1857年）Filipjev，华盛顿州蠕虫学会会议录，3的可能的杀线虫作用。，80-82，1936年，从出没的大蒜中分离出来。在体外试验中，萜烯的杀线虫活性按降序排列为香芹酚>丁子香酚>香叶醇>百里酚。当在2000μl/ L的浓度下进行测试时，香芹酚显示出最高的活性，即100％的死亡率。当将所有四个萜烯混合使用时，没有记录到协同作用。在土壤实验中，百里酚在所有其他萜烯中显示出最高的杀线虫活性，其次是香芹酚。我们的结果表明浓度与暴露时间之间存在正相关。另外，记录到增加每种萜烯的剂量会增加线虫的麻痹率。这些结果有力地表明了萜烯的杀线虫活性，