60年代以来,我所对鲁南低洼稻田地区中华按蚊的生态习性进行了观察,近几年又进行了实验研究。结果:1964年稻田改种前中华按蚊在人房蚊群组成中占第2位,其后居第1位;稻田改种后4～5年平均密度在人房上升2.7倍,畜舍和野外分别为5倍和1.9倍;近5年来第一代新生蚊出现时间较60年代约迟20天; Since the 1960s, we have observed the ecological habits of Anopheles sinensis in the lowland paddy fields of Lunan and conducted experiments in recent years. Results: Anopheles sinensis prior to the rice replanting in 1964 ranked No. 2 in the mosquito composition of the human house, followed by the No. 1 spot. After 4 ~ 5 years of rice replanting, the average density increased 2.7 times in the human house, And the field were 5 times and 1.9 times respectively; in the past 5 years, the first generation of new mosquitoes appeared about 20 days later than the 1960s;