5种精油对植物病原菌的抑制活性研究

采用生长速率法测定了黄皮叶、金橘叶、柚子果皮、番石榴叶、芒果叶5种植物精油对水稻稻瘟病菌(Phyricularia grisea)、西瓜枯萎病菌(Fusarium oxysporum f.sp.niveum)、香蕉枯萎病菌(Fu-sarium oxysporum f.sp.cubense)、芒果炭疽病菌(Colletotrichum gloeosporioides)、芒果蒂腐病菌(Bot-ryodiplodia theobromae)抑菌活性。结果表明:在1g/L质量浓度下,5种精油对病原菌均有明显的抑制活性,其中黄皮叶精油对水稻稻瘟病菌的抑制率高达93.85%,优于其他几种精油;黄皮叶精油不同质量浓度对4种病原真菌的毒力测定结果表明,其对芒果蒂腐病菌的EC50最低,为0.21g/L。

Studies on Antifungal Activities of the Five Essential Oils from Plants

The antifungal activities of the essential oils from Clausena lansium,Fortunella margarita,Citrus grandis,Psidium guajava and Mangifera indica by SFE-CO2 were tested against Phyricularia grisea,Fusarium oxysporum f.sp.niveum,Fusarium oxysporum f.sp.cubense,Colletotrichum gloeosporioides,and Botryodiplodia theobromae by using mycelial growth rate method.The results indicated that the essential oils had the antifungal activities against five fungi at the concentration of 1g/L.Especially the antifungal activities of the essential oil from Clausena lansium was excellent against Phyricularia grisea,and the inhibition rate was 93.85% at 1mg/mL;The EC50 of the essential oil from Clausena lansium was 0.21g/L against Botryodiplodia theobromae.