几年来,我场城门工区部分杉木发生了小袋蛾,为害严重。遵照毛主席关于“同病虫害作斗争”的教导,科研小组与工人群众对杉木小袋蛾的为害进行调查防治,取得了良好效果。发生小袋蛾的杉木针叶被蚀,叶背千疮百孔,以致整片枯黄。由 Over the past few years, my field gate Shimen part of the small pocket moth, serious damage. Following Chairman Mao’s teaching on “Combating Pests and Diseases and Pests,” research groups and the working masses conducted investigations on the prevention and control of the damage caused by the Chinese caterpillar, and achieved good results. Occurred pouch moth fir needles were eclipsed leaves riddled with holes, so that the whole piece of brown. by