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在毛主席关于“备战、备荒、为人民”的伟大战略方针指引下,在各级党委的正确领导和关怀下,为了寻找防治农业害虫的新途径,探索以虫治虫进行生物防治的实际效果,我们坚持“实践第一”的观点,于1972-1973年开展了利用赤眼蜂防治玉米螟、稻纵卷叶螟、棉铃虫、大豆造桥虫等几种主要害虫试验,并取得了一定的效果。两年来我们在汶上、鱼台、兖州等地共计放蜂面积达850亩,其中防治玉米螟650亩,防治稻纵卷叶螟150亩,防治棉铃虫20亩,防治大豆造桥虫30亩。试验结果表明,利用赤眼蜂防治玉米螟、稻纵卷叶螟效果较好,一般均在70—90％。此法简单易行,经济有效,每亩成本费仅0.13元,深受贫下中农欢迎。但我地区在利用赤眼蜂防治棉铃虫、大豆造桥虫效果很差,不能压低虫口密度,一般放蜂区卵寄生率仅有20-30％,最高不超过40％。现将试验结果整理如下:
Under the guidance of Chairman Mao’s great strategic principle of “preparing for war, preparing for war and for the people,” with the correct leadership and care of Party committees at all levels, in order to find new ways to prevent agricultural pests and explore the practical results of biological control of insect pests, We adhere to the “practice first” point of view, carried out in 1972-1973 the use of Trichogramma ostriniae control, the rice leaf roller, cotton bollworm, the number of bridge pests and other major insect pests test and made some effect. In the past two years, we have put a total area of 850 mu on Wenshang, Yutai and Yanzhou, including 650 mu for the control of corn borer, 150 mu for the control of rice leafroller, 20 mu of cotton bollworm and 30 mu for the control of soybean . The results showed that the use of Trichogramma ostriniae control, rice leaf roller is better, usually in the 70-90%. This method is simple, cost-effective, cost per acre only 0.13 yuan, welcomed by the poor peasants. However, the use of Trichogramma myobis in the prevention and treatment of cotton bollworm, soybean bridge parasite effect is very poor, can not depress the density of insects, the general put bee egg parasitic rate of only 20-30%, the highest not more than 40%. The test results are summarized as follows: