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Studies on the Identification of Keng Rice Varieties Resistant to Xanthomonas Oryzae pv.oryzae Dye andIts Control in Henan Province.

Xue Junjie (Plant Protection Research Institute,Henan Academy ofAgricultural Sciences,Zhengzhou 450002)  
In Past three years,the author apllied the method of artifical leaf-cutting vaccination ofXanthomonas Oryzae pv.oryzae Dye to identify 24 main rice varieties,which have been popularized or aregoing to be popularized in Yubei rice area.The investigation showed that only seven of the 24 varieties aremiddle susceptible,including Zheng Keng 754(Zheng rice 1),Zheng Keng 756(Zheng rice 5)and Xinrice 90247.The others are susceptible or highly susceptible varieties.3-5 Days before seedling transplant-ing,Yeqingshuang or agricultural antibiotics 751 can be used as spraying agent in controling rice bacterialleaf blight that may delay the occurrence of the disease in field for 10-15 days if the application timing atthe beginning of the disease-appearance.Using Yeqingshuang 20%,125-150g/mu,was recommended.
【CateGory Index】: S435.111.4
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