蝗害缘何又重来本刊编辑部１．蝗害又卷土重来今年春末夏初，我国部分地区特别是华北地区相继发生了蝗害。由于去冬今春特殊的生态条件，有利于蝗虫的生长和发育，今年夏蝗大发生，局部爆发，发生面积之大，密度之高，是六十年代以来所没有的。据农业部初步统计，山东、河... Why do locusts come back? Locusts are Coming Back This spring and early summer of this year, locusts have occurred in some areas of our country, especially in northern China. Due to the special ecological conditions of winter and spring, it is conducive to the growth and development of locusts. This locust locust occurred this year, with some local outbreaks, large area occurrences and high densities, which have not existed since the 1960s. According to preliminary statistics from the Ministry of Agriculture, Shandong, the river ...