福州地区柑桔蚜虫的种群动态

福州地区为害柑桔的蚜虫有7种。绣线菊蚜 Aphis citricola van der Goot为秋季重发型;棉蚜 A.gossypii Glover春、夏发生为主,桔蚜 Toxoptera citricidus(Kirkaldy)为全年轻发型。春季蚜虫的虫源以迁入为主。有翅蚜梢率和有翅胎生蚜的数量与受害程度之间有显著相关性。柑桔新梢的抽发时期、数量和成熟的快慢对蚜虫种群的变动产生重要影响。

THE POPULATION DYNAMICS OF CITRUS APHIDS IN FUZHOU

There are seven species of aphids feeding on citrus in Fuzhou Area,in which only three are of importance.Aphis citricola van der Gootis abundant in autumn;A.gossypii Glover mainly occurs in springand early summer;and Toxoptera citricidus (Kirkald) yis light injuriousthroughout the growing season.The aphid origin in spring is immi-grant,followed by a diffuse procession from early infested point.Thereis close relationship between the damage to citrus and alate infestedshoot as well as the amount of alate viviparae.The effect of sprou-ting time,speed of maturity and quantity of citrus shoot on aphidpopulation dynamics is significant.