论文部分内容阅读
全国农技推广中心日前在新疆乌鲁木齐市召开了下半年全国重大病虫害发生趋势会商会。与会专家根据当前病虫基数、栽培条件和气候因素等综合分析,预计中晚稻病虫害总体呈偏重发生态势,重于上年,发生面积11.1亿亩次。其中,虫害以迁飞性、钻蛀性害虫为主,发生面积7.2亿亩次,“两迁”害虫偏重至大发生;病害以稻瘟病、纹枯病为主,总体中等至偏重流行,发病面积3.9亿亩。预计稻飞虱将在南方大部稻区大发生,发生面积3.0亿亩次。其中,西南、华南、江南、长江中游稻区大发生,长江下游、江淮稻区偏重发生。稻纵卷叶螟在华南、江南、西南大部稻
National Agricultural Technology Extension Center recently held a conference on the trend of major pests and diseases in the second half of this year in Urumqi, Xinjiang. According to the current comprehensive analysis of the number of pests and diseases, planting conditions and climate factors, experts at the participating regions are expected to have a general tendency to develop pests and diseases in mid-late rice, with a weight of 1.11 billion mu more than that of the previous year. Among them, the pests were mainly migratory and borer pests, with an area of 72 million mu, “pests” shifted from “peasants to pests”, diseases such as rice blast and sheath blight, and overall moderate to prevalent epidemic , The incidence of 390 million mu area. It is estimated that planthoppers will occur in most rice areas in the south with an area of 300 million mu. Among them, the southwest, south China, south of Yangtze River, the middle reaches of the Yangtze River rice area occurred, the Yangtze River, Jianghuai rice area emphasis occurred. Rice leafroller in South China, Jiangnan, most of the southwest of rice