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后季稻两段育秧,病虫害较多,其发生规律与一段育秧的有明显不同.现将去年的初步观察结果与防治体会,简述如下.一、病虫发生的特点第一段育秧阶段第一段秧苗生长前期,主要受稻蓟马与灰飞虱为害.6月下旬稻蓟马与灰飞虱大量迁移时,正值第一段秧苗生长旺盛的时期,故迁入量很大,稻蓟马的百株卵量达二千粒以上.据光福农科站7月10、14日的调查,灰稻
After the second season rice seedlings, pests and diseases more, the occurrence of a rule and a section of seedlings are significantly different now last year’s preliminary observations and prevention and treatment experience, summarized as follows.First, the characteristics of pests and diseases in the first stage A period of seedling growth early, mainly by the rice thrips and Laodelphax striatellus late June thrips and the large-scale relocation of planthopper, positive during the first period of vigorous growth of seedlings, it moved a lot, rice Thousands of thrips a hundred eggs up to more than 2000. According to Guangfu Agricultural Station July 10, 14 survey, gray rice