无产阶级文化大革命以来,在毛主席革命路线指引下,我所科技人员,以阶级斗争为纲,坚持党的基本路线,实行开门办科研,开展了群众性的利用瓢虫防治棉蚜的科学实验活动。四年来,对瓢虫资源、历期食蚜量、交尾产卵习性、人工饲料、利用等方面进行了一些研究。1972年在阳谷县石门宋公社西宋大队试用以瓢治蚜17亩,1973年扩大到聊城、高唐、莘县、东阿等县2万多亩,1974年全区以瓢治蚜面积达21.2万亩,1976 Since the Great Proletarian Cultural Revolution, under the guidance of Chairman Mao’s revolutionary line, scientific and technological personnel of our institute, taking class struggle as the key link and upholding the Party’s basic line, have carried out open door scientific research and conducted mass scientific experiments using ladybugs to prevent and control cotton aphid activity. In the past four years, some researches have been done on ladybug resources, pasture aphids, copulation spawning habits, artificial feeds and utilization. In 1972 Yangcheng Shimen Song commune Xizong Brigade trial scoop governance aphids 17 acres in 1973, expanded to Liaocheng, Gaotang, Shenxian County, East A county 20,000 acres, in 1974 the area to scoop aphid area Up to 212,000 mu, 1976