论文部分内容阅读
近日,记者从全国农技推广中心召开的下半年全国重大病虫害发生趋势会商会上了解到,今年上半年,水稻重大病虫在南方大部稻区总体偏重发生,发生程度重于去年同期,发生面积4.0亿亩次,其中虫害发生3.1亿亩次,病害发生0.9亿亩次。预计下半年,中晚稻病虫害还将偏重发生,防治任务艰巨。据病虫害测报处负责人介绍说,由于上半年的迁飞性害虫迁入早、峰次多、虫量大,导致今年水稻田间虫害发生程度明显重于上年。从3月中旬开始,广西钦州、贵州荔波等地就开始监测到多个稻飞虱迁入峰,迁入时间普遍较上年偏早10~15天,其中江南、西南北部稻区迁
Recently, the reporter learned from the Chamber of Commerce on the trend of major pests in the second half of the year held by the National Agricultural Technology Extension Center. In the first half of this year, major pests and diseases of rice took a big part in most rice areas in southern China, which occurred more heavily than in the same period of last year The area of 400 million mu, of which 310 million mu of pests occurred, the disease occurred 0.9 million mu times. It is estimated that in the second half of this year, pests and diseases in the middle and late rice will also take priority and the prevention and treatment tasks will be arduous. According to the person in charge of the Plant Disease and Pests Information Office, due to the migration of migratory pests in the first half of the year, the number of peak times and the amount of insects are large, the pest incidence in paddy fields this year was obviously heavier than in the previous year. From mid March, Qinzhou, Guangxi and Libo of Guizhou began to monitor the migration of many planthoppers to the peak. The time for moving in was generally 10-15 days earlier than the previous year, of which,