云南省三地区稻田有害生物主要种类及其发生动态研究

 对云南省寻甸县、弥勒县、沾益县主要水稻生产区的9个村庄151块水稻主栽品种稻田有害生物种类组成及其发生动态进行了系统调查。结果表明，3个地区有害生物的主要种类、发生动态及其综合危害特点不同，其中寻甸县以稻白叶枯病、叶蝉类发生严重；弥勒县以稻纹枯病、飞虱类发生严重；沾益县以稻胡麻叶斑病、稻叶鞘腐败病、稻曲病发生严重。杂草在整个水稻生长季节均有发生且发生种类很多，其中主要种类有稗草、紫背浮萍、慈姑、眼子菜等。

Study on the Species and Dynamics of Pests in Rice Fields in Different Regions of Yunnan Province

An investigation of pests in 151 rice crop fields in 9 villages of Xundian，Mile and Zhanyi Counties, which are the major rice production areas for major varieties of rice in Yunnan province, was conducted from May to October, 2006. The objective was to determine pest categories and dynamics of these 3 rice production areas. The result of data analysis indicated the 3 areas had different pest characteristics of main categories, dynamics, and combined injuries. Bacterial leaf blight and leafhopper were serious in Xundian County; Sheath blight and plant hopper damaged severely in Mile County; Brown spot, sheath rot and false smut were serious in Zhanyi County. Many kinds of weeds infestation appeared in the whole rice growth season, such as Echinochloa crusgalli (L.)Beauv, Spirodela polyrhiza, Sagittaria sagittifolia L., Potamogeton disinctus A.Benn.