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| Studies on Inhibitory Effects of Nano-Cu2O on Phytophthora capcisi and Fusarium oxysporum of Pepper |
| YANG Jun-li1，DONG Hui-ze1，LI Yi2，TIAN Xiao-li2，HOU Quan-gang2 |
| 1Qinghai University，Xining 810016，Qinghai，China|2College of Agriculture and Forestry，Qinghai University，Xining 810016，Qinghai，China |
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Abstract 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．
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Received: 03 November 2011
Published: 27 November 2011
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