苹果根爪绵蚜生物学特性研究

通过田间调查和人工接种，首次发现苹果根爪绵蚜是为害苹果树根的重要新害虫，并确定苹果根爪绵蚜营异寄主全周期生活其原生寄主为榆，次生寄生为苹果，沙果。

Biological Study of Aphidounguis Poniradicicola Zhang et Hu

The research based on field investigation and artificial inoculation,firstly dicates that Aphidounguis pomiradicicola Zhang et Hu is an important and new in sectenemy at root of apple.The life history belongs to heteroceous holocycle type,elm(Ulmuss pp.)is the primary host,apple(Maluss pp.)is the secondary host.From the midde of May to the end of May alate fundatrigeniae fly and migrate to the apple and apterous viviparous female do the damage to the thin root of the apple.From the begining of October to the beginning of November sexuparae fly and migrate to the elm and produce the sexuales of female and male.After mating the female sexuales lay eggs.The eggs hibernate.In spring,the fundatrix and alate fundat rigeniae damage the leaves on the elm and produce in sect galls.