论文部分内容阅读
根据重庆市历年病虫草鼠害发生情况、作物品种布局、耕作制度、天气预报等因素,重庆市种子管理站经初步分析,预计2014年重庆市主要农作物病虫草鼠害发生程度为4级(中等偏重),发生面积9000万亩(次)左右。1.水稻病虫。预计发生程度为4级,发生面积3000万亩(次)左右。其中:二化螟发生程度为4级,预计发生面积900万亩(次)左右。稻飞虱总体发生程度4级,其中渝西部1~2级,渝中部及渝东北部3~4级,渝南部发生程度为4~5级,预计发生面积500万亩(次)左右。稻纵卷叶螟发生程度为3级,
According to the occurrence of pest and disease rat roders, crop variety layout, farming system and weather forecast in Chongqing in the past years, a preliminary analysis of Chongqing Municipality Seed Management Station shows that the incidence of pest, weed, rodent pest and disease in Chongqing Municipality in 2014 is 4 (medium Emphasis), the occurrence of an area of 9000 mu (times) or so. Rice pest Expected to occur to a level of 4, with an area of 30 million mu (times) or so. Among them: the occurrence of Chilo suppressalis 4, the expected area of 900 mu (times) or so. The total occurrence of planthoppers is 4, of which 1 ~ 2 in western Chongqing, 3 ~ 4 in Yuzhong and northeastern Chongqing, and 4 ~ 5 in Yunan, with an estimated area of 500 mu (times). The occurrence of rice leaf roller is 3,