一、发展微生物防治的重要意义: 1.农药公害急待防除。 防治虫害是保证农林业稳产高产的重要措施之一。长期以来,防治病虫害都以化学农药为主,尤其是四十年代中期有机合成农药的发展,使化学防治成为植物保护的最主要手段。无疑,化学农药有其重大优点,但“事物都是一分为二的”,化学农药在其迅速发展过程中也日益暴露出不少缺点,其中特别严重的是:①影响人 First, the development of the significance of microbial control: 1. Pesticide public health emergency. Pest control is one of the important measures to ensure stable and high yield of agriculture and forestry. For a long time, pests and diseases have been dominated by chemical pesticides, especially the development of organic synthetic pesticides in the mid-1940s, making chemical control the most important means of plant protection. There is no doubt that chemical pesticides have their major advantages, but “everything is divided into two parts.” Chemical pesticides are also increasingly exposed during the rapid development of many shortcomings, of which the most serious are: