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以红景天立枯病菌(Rhizoctonia solani Kühn)等12种病原真菌为供试靶标,测试了胡桃醌(5-羟基-1,4-萘醌)及其衍生物5,8-二羟基-1,4-萘醌的抑菌活性。结果表明:两者对丝核菌属病原真菌菌丝生长的抑制作用大于镰刀属,对3种丝核菌属病原真菌的EC50分别为10.63～15.88mg/L、9.79～14.69mg/L;两者对玉米小斑病菌孢子萌发的抑制作用最高,在12.5mg/L时,抑制率均达到60%以上;在50mg/L时,对镰刀属4种病原真菌孢子萌发抑制率均达到60%。
Twelve pathogenic fungi, Rhizoctonia solani Kühn, were used as test targets to test the effects of juglone (5-hydroxy-1,4-naphthoquinone) and its derivatives, 5,8-dihydroxy- , 4-naphthoquinone antibacterial activity. The results showed that both of them had greater inhibitory effects on the mycelial growth of Rhizoctonia pathogenic fungi than that of the genus Fusarium. The EC50 values of the two strains were 10.63 ~ 15.88 mg / L and 9.79 ~ 14.69 mg / L for the three Rhizoctonia pathogenic fungi. Had the highest inhibitory effect on the spore germination of S. turcica. At 12.5 mg / L, the inhibition rates reached 60%. The inhibitory rates of spore germination to 4 pathogenic fungi were all 60% at 50 mg / L.