摘要
通过人工接种和田间调查，首次发现榆绵蚜的第二寄主是梨树，并确定榆绵蚜营异寄主全周期生活，５月中旬至６月中旬，榆绵蚜以有翅干雌蚜迁飞到梨园，在梨树根稍产无翅孤雌侨蚜为害；１０月初至１１月初，又以性母蚜迁飞到榆树上产雌雄性蚜，交配后雌蚜产卵越冬；春季干母、无翅干雌、有翅干雌为害榆叶形成伪虫瘿。
The researches based on artificial inoculation and field investigation for the frist time indicate that pear ( Pyrus spp.) is secondary host of Eriosoma lanuginosum dilanuginosum (Zhang,1980).The life history belongs to heteroceous holocycle type.From the midde of May to the middle of June alate fundatrigeniae fly and migrate to the pear and apterous viviparous female do the damage to the thin root of the pear.From the begining of October to the beginning of November sexuparae fly and migrate to the elm ( Ulmus spp.) and produce the sexuales of female and male.After mating the female sexuales lay an egg.The eggs hibernate.In spring the fundatrix, apterous fundatrigeniae and alate fundatrigeniae damage the leaves on the elm and produce pseudogalls.
出处
《西北农业大学学报》
CSCD
北大核心
1998年第4期25-29,共5页
Journal of Northwest Sci-Tech University of Agriculture and Forestry（Natural Science Edition)
基金
国家"九五"攻关项目
咸阳市科委资助
关键词
榆绵蚜
伪虫瘿
梨树
生物学
榆树
Eriosoma lanuginosum dilanuginosum, pseudogalls,heteroceous holocycle,negative growth
