近年来,生物防治作为一门独立的应用学科愈来愈被人们所重视,这是因为当代的生物防治要求从整个农业生态系统来加以考虑的。为了恢复和保持生态平衡,世界各国在理论或实践中已做出了大量的成绩。苏联是害虫生防面积最大的国家,1983年已达四亿七千二百五十万亩。美国是以传统的生物防治起家的国家,早已把生物防治纳入了综合治 In recent years, biological control has gained more and more attention as an independent applied discipline because contemporary biological control requires consideration from the entire agroecosystem. In order to restore and maintain the ecological balance, various countries in the world have made great achievements in theory or practice. The Soviet Union is the country with the largest area of ​​pest pest prevention and control. It reached 472,500 mu in 1983. The United States is a country that started with the traditional biological control and has long included biological control into the comprehensive treatment