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哲盟科左后旗1989年开发水稻7.8万亩,育秧面积45.7万平方米,成功率只占85％,其主要原因是立枯病和青枯病所致。根据该旗水稻生产预计到1991年开发面积18.5万亩,到本世纪末发展到80万亩的实际情况,育秧也随之增加。因此,为保证提高秧苗质量和稳产高产,防治水稻立枯病和青枯病势在必行。一、防治立枯病的主要措施水稻立枯病一般在秧苗长到一叶一心或二叶一心时发病,发病初期苗床由点块局部逐渐的扩展到成片或整床,秧苗急剧地由绿变黄,叶片萎蔫,根茎部由黄变褐,叶茎部变褐,根部由白变黑,可见白色的霉层,后期干枯死亡。防治立枯病的主要技
Zhehou Banner, Zhehe League. In 1989, 78,000 hectares of rice were developed and the area for raising seedlings was 457,000 square meters. The success rate was only 85%. The main reason for this was the result of blight and bacterial wilt. According to the flag of rice production is expected to 1991 to develop an area of 185000 acres, to the end of this century to 800000 acres of the actual situation, nursery also increased. Therefore, in order to ensure the improvement of seedling quality and high yield, it is imperative to prevent and control rice blight and bacterial wilt. First, the main measures to control the blight Rice blight generally grow in the seedlings to one heart or two leaves one heart disease, the early onset of the seedbed from the point piece gradually expanded into a film or a whole bed, the seedlings rapidly from green Yellowing, wilting leaves, rhizomes from yellow brown, browning the stems, the roots from white to black, visible white mold layer, the late death. The main technology to control the blight