在南宁全年种有烟苗的条件下，烟蚜种群数量高峰期分别出现在１月上旬至３月下旬和５月中旬至６月上中旬。蚜茧蜂ＡｐｈｉｄｉｕｓｇｉｆｕｅｎｓｉｓＡｓｈｍｅａｄ是烟蚜重要寄生性天敌，其种群数量年内也出现两个高峰期，且均分别在烟蚜发生峰期之后。采用几种复配型杀虫剂防治烟蚜，防效均达９３．７３％以上，其中２０％（８８１７－Ⅱ号）乳油对蚜茧蜂羽化率的影响比５０％甲胺磷乳油小 Under the conditions of Nanning tobacco seedlings all year round, the population peak of Myzus persicae appeared in early January to late March and mid May to mid June, respectively. Aphidius gifuensis Ashmead, an important parasitoid natural enemy of Aphis gossypii, also had two peaks during the year, both of which occurred after the peak of the Myzus persicae. Several kinds of compound insecticides were used to control Myzus persicae, and the control effect reached 93.73%. Among them, 20% (8817-Ⅱ) EC had a less influence on emergence than 50% methamidophos