水稻对黑条矮缩病感病生育期研究初报

Preliminary Report on the Susceptible Growth Stages of Rice to Rice Black-streaked Dwarf Disease

为明确水稻品种对黑条矮缩病的感病生育期,分别于水稻二、四、六、八、十叶龄期模拟田间发病条件对特特普和华粳6号两品种进行接种比较抗病性差异。结果发现八叶龄以内的特特普与十叶龄以内的华粳6号均表现为感病,十叶龄水稻品种则表现为不感病,随着叶龄的增加水稻品种对病害敏感程度呈下降趋势。这表明水稻品种不同生育期对黑条矮缩病感病性存在差异,而秧田期和本田前期是水稻对水稻黑条矮缩病感病性较强的时期,本研究结果可望为水稻黑条矮缩病综合防治策略的制定提供重要依据。

In order to identify the susceptible growth stages of rice to rice black-streaked dwarf disease,the difference of resistance level among 2,4,6,8,10 leaf ages in two rice varieties,Tetep and Huajing No.6,were analyzed in simulated field conditions.The results showed that Tetep with leaf age less than 8 and Huajing No.6 with leaf age less than 10 were susceptible to rice black-streaked dwarf disease,while both Tetep and Huajing No.6 at 10 leaf age were resistance to the disease.With the increase of leaf ages the sensitivity of rice varieties on disease decreased.This indicated that the susceptibility showed differences in the various growth stages of rice to rice black-streaked dwarf disease.The susceptible growth stages of rice to rice black-streaked dwarf disease were the seedling stage and the early field stage.The results were expected to provide essential evidence for the integrated control strategy to rice black-streaked dwarf disease.