论文部分内容阅读
１９９６年全国粮棉重大病虫发生趋势全国农业技术推广服务中心北京１０００２６目前，长江、江淮流域及华北中、南部冬小麦已开始返青，南方部分地区早稻已进入育秧阶段。根据病虫基数调查、气候条件以及寄主作物环境分析，预计１９９６年全国粮棉重大病虫为偏重发生趋势...
In 1996, the trend of major diseases and pests of grain and cotton in China occurred. National Agricultural Technology Extension Service Center Beijing 100026 At present, the winter wheat in the Yangtze River, the Yangtze-Huaihe River Valley and the central and southern parts of North China have begun to rejuvenate. Early rice in some areas in southern China has entered the stage of seedling cultivation. According to the survey of pests and insect pests base, climate conditions and the analysis of the host crop environment, it is estimated that in 1996 the major pests and diseases of grain and cotton in the whole country will tend to be the trend of occurrence ...