河南省粳稻品种抗白叶枯病鉴定及防治研究

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

经连续３年对豫北稻区已推广和将要推广的２４个主要品种（系）进行人工剪叶接白叶枯病菌鉴定，其中中感品种７个，有郑粳７５４（郑稻１号）、新稻９０２４７、郑粳７５６（郑稻５号）等，其余皆为感病和高感病品种。苗期移栽前３～５天喷药（叶青双或农抗７５１）防治白叶枯病，可使大田推迟发病１０～１５天。大田的防治适期应在发病的初期，喷施农药以每亩喷２０％叶青双１２５～１５０克为好。农抗７５１（中生菌素）的效果也较理想。

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.