关键词: 除四害, 密度, 敏感性, 现场试验, 综合防制

Abstract: Objective:Controlling the density of four pests (cockroach, fly, mouse and mosquito) in Changchun City to reach the national standard. Method: Adopting methods of chemistry, physics and biology prevent and control comprehensively. Result: After comprehensive prevention and controlling, the group of examine and appraisal annihilating cockroach of national patriotic health office had examined to Changchun city from 24 to 26 of September in 1997 and the result indicate that rate of disoperation is 0.48% through selectively examined 2 102 room. The countercheck group of deratization of national patriotic health office had examined from 21 to 24 of April in 1998 and the result indicate that positive powder piece did not discovered used the method of powder mark. Adopting the method of rat trace, 2 036 rooms had selectively examined and the positive rate of rat trace was 1.57%. Conclusion: By comprehensive prevention and controlling “four pests” incessantly, they could be controlled effectively.