摘要
通过对太谷地区夏播大豆田截形叶螨的田间为害及发生规律进行观察研究，结果表明：在太谷地区截形叶螨从夏播大豆幼苗期即开始为害，７月下旬达到为害高峰，为害盛期持续１个月之久。同时表明，截形叶螨不同虫态虫口密度的最大叶区不同，其中成虫、卵主要分布在植株的中上部叶片上，幼虫、若虫主要分布在植株的中下部叶片上。
etranychus truncatus Ehara was an important pest of summer-sowing soya in central part of Shanxi province in recent years,So a study on it was carried out in Taigu county.The result reveals that Tetranychus truncatus Ehara occurs just after soya's seedling emerges and develops to its peak in late of july the damaging period can last more than one month moreover,the population density at different stages of pest varies in different parts of soya plant,imagoes and eggs are mainly distributed on uper-middle leaves of plant,whereas larves and nymphs on lower-middle leaves of plant.
关键词
夏播
大豆
截形叶螨
种群动态
叶螨
发生为害
Summer-sowing soya
Tetranychus truncatus Ehara
Population dynamics
