“7501”杀虫菌是陕西省大荔县农林局农业微生物厂于1975年试产成功后,我县农林局于1977年引种,78年3月份开始试产,78年5月份县林业站,首先应用于防治杨柳毒蛾幼虫危害,获得了成功,现将试产、试用情况报告如下:“7501”杀虫菌是陕西省大荔县在枣区自然灭亡的枣尺(虫户)尸体上分离到的一种繁殖快、晶体大、发育周期短、毒力强的产晶芽胞杆菌,该县经多次室内和田间药效表明“7501”防治尺 “7501” insecticide is Dali County Agriculture Bureau of Shaanxi Province after the successful trial production of agricultural microbes plant in 1975, the county introduced in 1977, Agriculture and Forestry Bureau, 78 years trial production began in March 78 County Forestry Station in May, First applied to the prevention and control of the toxicity of the larvae of the willow moth, with success, the trial production and trial application are reported as follows: The “7501” insecticidal strain is isolated from the body of the jujube (insect) that died naturally in the date region of Dali County, Shaanxi Province. To a fast propagation, large crystals, short developmental cycles, strong virulence Bacillus megaterium, the county after many indoor and field efficacy showed that “7501” control rule