哈尔滨地区大豆蚜在大豆田中的迁飞扩散研究

Study on migration and dispersion of soybean aphids in soybean field in Harbin

通过两年田间系统调查,研究了大豆田中大豆蚜有翅蚜的发生与大豆蚜种群数量和分布的关系。结果表明,大豆蚜有翅蚜的发生在大豆整个生长发育过程中共出现4次峰值,分别为6月初、7月中旬、8月上旬、8月末到9月初,第1次为迁入期,数量较少,在大豆田中只是零星出现;第2、3次迁飞数量较大,直接影响到大豆蚜在大豆田中的发生量和分布;第4次为秋迁期,大豆蚜由夏寄主迁至冬寄主上越冬。

Dynamics of soybean aphid alate morph and its influence on the damage were studied by field survey in 2006 and 2007. It showed that the population number peak of alate aphid occurred respectively in early June, mid July, early August and during late August to early September. Soybean aphid began to emigrate into soybean in early June, but only occurred sporadically. Soybean aphid number was large on mid July and in early August, which influenced the subsequent population. The aphid emigrated in search of Rhamnus during late August to early September.