超低容量喷雾技术是七十年代国外大力试验推广的一种先进施药方法。其借助于先进的喷雾技术,使最少量的农药达到最大的杀虫效果。比常规的施药方法具有省工、省药、效率高、效果好、成本低的优点。近年我国在防治森林害虫上试验,取得较好的效果。多年来,我区大力推广白僵菌防治松毛虫,这对控制松毛虫有很大的贡献。但由于白僵菌在应用的条件及技术上的局限,下半年使用的效果常常不可靠,故在防治第二、三代松毛虫时,多依靠化学农药起应急作用。因此在近期内,化学防治仍然是综合防治技术中的一个重要环节。为此,进一步改进农药的使用技术,合理使用化学农药已成为当前急需解决的一个重要研究课 Ultra-low volume spray technology is a kind of advanced application method which is vigorously popularized in the seventies in foreign countries. With the help of advanced spray technology, the minimum amount of pesticides can reach the maximum insecticidal effect. Compared with the conventional method of application has the advantages of labor-saving, drug-saving, high efficiency, good effect, low cost. In recent years, our country has done a good job in the prevention and control of forest pests and achieved good results. Over the years, my area vigorously promote Beauveria bassiana prevention and control of pine caterpillars, which have a great contribution to the control of pine caterpillars. However, Beauveria bassiana in the application of the conditions and technical limitations, the second half of the effect is often not reliable, so in the second and third generations of pine caterpillars, the more rely on chemical pesticides play an emergency role. Therefore, in the near future, chemical control is still an important link in comprehensive prevention and control technologies. To this end, to further improve the use of pesticides, the rational use of chemical pesticides has become an urgent need to solve an important research class