论文部分内容阅读
松毛虫是我省松林中最严重的害虫,因其危害,造成松林的巨大损失。广大群众在生产斗争的实践中,寻找出多种防治措施,有效的控制了松毛虫的发展和蔓延,对巩固绿化成果,保障林业生产和加强战备起到了应有的作用。但是,由于化学农药在林间长期使用,对林间有益生物和寄生性昆虫具有不同程度的毒害作用。所以松毛虫防治工作,应向以生物防治为主的综合防治方面发展。无产阶级文化大革命以前,在应用生物防治方面,由于刘少奇一类骗子的干扰和破坏,使生防工作走向了脱产生产的道路。因而使生防工作的发展受到了限制,进展缓慢。为响应毛主席“备战、备荒、为人民”的伟大号召,抚宁县从1971年用自制菌粉(含孢子量为47-97亿/克),在平市庄林场北庄河大队,进行林间试验,杀虫效果达80％左右;1972年又在北庄河大队山海关林场放菌400多亩,虽遇特大干旱,但杀虫效果仍达47.7-94.3％。省农业局,唐山地区科技局、农业局,1972年和1973
Pine caterpillars are the most serious pests in pine forests in our province, causing huge losses of pine forests due to their damage. In the practice of the struggle for production, the masses of the people sought a variety of prevention and control measures to effectively control the development and spread of the pine caterpillars, and played a due role in consolidating the achievements of greening, ensuring forestry production and enhancing combat readiness. However, due to the long-term use of chemical pesticides in the forest, toxic effects on the forest useful parasites and parasitic insects to varying degrees. Therefore, the prevention and control of pine caterpillars should be based on biological control of integrated prevention and control development. Before the Great Proletarian Cultural Revolution, in the field of applied biological control, the prevention and destruction of Liu Shaoqi’s liar led the work of biological defense to the path of full-time production. Therefore, the development of biocontainment work has been restricted and the progress has been slow. In order to respond to the great call of Chairman Mao for “preparing for war, preparing for war and for the people,” Funing County conducted an inter-forest experiment with homemade powder (containing 47-97 million / g of spores) in 1971 at Beizhuanghe Brigade in Pinglin Zhuang Farm. , Insecticidal effect of about 80%; 1972 Bei Zhuang River Brigade Shanhaiguan forest farm more than 400 acres of bacteria, despite the exceptionally severe drought, but still up to 47.7-94.3% insecticidal effect. Provincial Bureau of Agriculture, Tangshan District Science and Technology Bureau, Bureau of Agriculture, 1972 and 1973