我们于1973—1977年开展了飞机喷施白僵菌粉防治玉米螟的试验,收到了较好的防治效果,现将试验结果介绍如下: 一、试验方法 白僵菌孢子含量为50—100亿/克。 每亩用原菌剂0.2—0.5斤(表1)。飞机为农用“运五”型,一般在早晨及傍晚进行喷施,风力1—2级,风力过大则应停止作业。飞行高度一般为5米左右,有的7—8米。 二、防治效果 We carried out in 1973-1977 aircraft spraying Beauveria bassiana powder control corn borer test, received a good control effect, the test results are as follows: First, the test method Beauveria bassiana spores content of 50-100 million / G 0.2-0.5 kg per acre of the original agent (Table 1). Aircraft for agricultural “five” type, usually in the morning and evening spray, wind 1-2, the wind is too large should stop working. The flight height is generally about 5 meters, some 7-8 meters. Second, control effect