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1969年冬,广西林业科学研究所和合浦炮竹厂组成“三结合”试验小组,经反复实践,试制成功杀虫粉炮。现广西地区已有很多单位生产、使用。1973年全区应用粉炮防治松毛虫面积达72138亩,效果较好。如钦廉林场,1970年5～6月平均每亩放2.4炮防治第一代松毛虫,死亡率达95%以上。1973年七坡林场越冬代松毛虫发生36780亩,用白僵菌粉炮2600个(每个粉炮重1.1市斤,含白僵粉1市两),燃放在35900多亩松树林中,平均每个粉炮放10～
The winter of 1969, Guangxi Forestry Science Institute and Hepu Gun Bamboo Factory formed a “triple combination” of the experimental group, after repeated practice, the trial success of insecticidal powder artillery. Now there are many units in Guangxi production, use. In 1973 the application of artillery powder prevention and control of pine caterpillars area of 72,138 acres, the effect is better. For example, in Qinlin Forest Farm, 2.4 guns were released per mu on average from May to June 1970 to control the first generation of pine caterpillars with a mortality rate of over 95%. In 1973, over 7,500 hectares of pine caterpillars occurred in Qipu Forest Farm, with 2,600 Beauveria broomcorn guns (each weighing 1.1 kilograms each, containing Baizang powder in one city and two batches), and were released in 35,900 mu of pine forest with an average of Each gun put 10 ~