麦双尾蚜的替代寄主与季节性转移

ALTERNATE HOSTS OF RUSSIAN WHEAT APHID AND ITS SEASONAL TRANSFER

１９９４ ～１９９８ 年， 在塔城和哈密麦双尾蚜Ｄｉｕｒａｐｈｉｓ ｎｏｘｉａ （ Ｍｏｒｄｖｉｌｋｏ） 分布区的调查结果显示： 小麦收获后， 野燕麦、黑麦和自生麦苗是麦双尾蚜的重要替代寄主， 偃麦草和羊草上有少量的麦双尾蚜发生， 其它禾本科杂草上很少发生麦双尾蚜。在塔城冬、春麦混合种植区， 冬麦田是麦双尾蚜的主要越冬点。从５ 月份开始有翅蚜不断迁移到春麦上为害， 秋季主要从晚熟春麦迁移到冬麦上产卵越冬。

Several species of grasses were regularly surveyed for the existence of the Russian wheat aphid, Diuraphis noxia (Mordvilko),during 1994～1998 in Tacheng and Hami,Xinjiang Uygur Autonomous Region. Avena fatua,Secale cereale,Elytrigia repens and volunteering wheat served as the important alternate hosts for the aphid after crop harvest. In Tacheng,early sown winter wheat provided for RWA an overwintering refuge from where the aphids transferred to spring wheat or the alternate hosts in spring,and came back in fall.