纳米氧化亚铜对辣椒疫霉菌和根腐病菌的抑制作用

利用纳米材料的特性生产纳米级杀菌剂是近年来农药研发的新领域。为了解纳米氧化亚铜（Cu2O）对辣椒疫霉菌和辣椒根腐病菌的抑菌效果，配制了5个浓度的纳米Cu2O，分别为250、500、750、1 000、1 250 mg?kg-1，采用含药培养基法进行了毒力测定。结果表明：同一质量浓度的纳米Cu2O对辣椒疫霉菌的抑菌效果明显优于对辣椒根腐病菌的抑菌效果|质量浓度与抑制作用呈正相关，毒力回归方程的相关系数都在0.97以上|纳米Cu2O对辣椒疫霉菌和辣椒根腐病菌的EC50分别为135.4 mg?kg-1和706.2 mg?kg-1。纳米Cu2O对辣椒疫霉菌有明显的抑制作用。

Studies on Inhibitory Effects of Nano-Cu2O on Phytophthora capcisi and Fusarium oxysporum of Pepper

Using the special characteristics of nanometer materials to develop nanoscale germicides is a new area of germicide research and development.To investigate the inhibitory effects of nano-cuprous oxide(Cu2O)on Phytophthora capcisi and Fusarium oxysporum of pepper(Capsicum annuum L.),5 concentrations of nano-Cu2O,i.e.250,500,750,1 000,1 250 mg·kg-1 were prepared and drug-containing medium were used for conducting the toxicity test.The results indicated that under the same concentration,the inhibitory effects of nano-Cu2O on Phytophthora capcisi were better than those on Fusarium oxysporum.The inhibitory effect was positively correlated to concentration,and correlation coefficient was over 0.97.The EC50 was 135.4 mg·kg-1 and 706.2 mg·kg-1 for Phytophthora capcisi and Fusarium oxysporum,respectively.Nano-cuprous oxide had significant effects on pepper Phytophthora capcisi.