5%蒜精油水乳剂对三种棉花致病菌的毒力作用

The Toxicity Action of 5% Allicin EW to Three Kinds of Cotton Pathogens

试验采用生长速率法测试了 5 %蒜精油水乳剂对棉花立枯丝核菌、棉花串珠镰孢菌和棉花尖镰孢萎蔫专化型真菌的室内毒力 ,三者的EC50 分别为 1 9.4mg/L、7.1mg/L、2 0 .6mg/L ,表明 5 %蒜精油水乳剂对 3种病原菌均有明显的抑制作用。试验结果为 5 %蒜精油水乳剂应用于棉花病害的防治提供了依据。

The toxicity of 5% allicin EW to three kinds of cotton pathogens as Rhizoctonia solani Kuhn.,Fusarium moniliforme Sheldon.,Fusarium oxysporum F.were assayed in the laboratory using growth velocity method and their EC 50 were calculated as 19.4 mg/L,7.1 mg/L,20.6 mg/L,resp.The results showed that The activity of allicin to three pathogens can inhibit all of the three fungus effectively. The experiment results will be benefit to application of 5% allicin EW as fungicide to cotton diseases.