扑灭顽虫护绿色──敖汉旗人工防治松毛虫纪实杨晓天，张海学自８０年代初期开始，敖汉旗南部山区的油松开始点块的失绿，翠绿的针叶几天时间便不见踪影。油松成片成片的发黄，人们称之为“无烟的火灾”。“无烟火灾”在蔓延，林业技术人员经实地调查，确认为松毛虫危害... Fighting green bugs - Aohan flag artificial prevention and control of pine caterpillars documentary Yang Xiaotian, Zhang Haixue Since the early 1980s, Aohan Qi in the southern mountains of the beginning of the point of the missing piece of green, green needles disappear for a few days time . Pine into a piece of film into yellow, people call it a “smoke-free fire.” “Smoke-free fire” is spreading, forestry technicians field investigation, confirmed as the damage of pine caterpillars ...