麦蜘蛛全称小青红蜘蛛,主要有麦长腿蜘蛛和麦圆蜘蛛两种。近年来,两种蜘蛛在我省均有不同程度的发生。以麦长腿蜘蛛发生较重,危害时间长,成为防治的重点。麦长腿蜘蛛在我省每年发生3—4代,以成虫和卵越冬。在冀南来春2月中下旬成虫开始活动,越冬卵也开始孵化,3月中旬虫口密度逐渐上升,4月中旬至5月上旬是麦田密度最大时期。此期正为小麦孕穗抽穗时期。因此,常造成大幅度减产。5月中下旬田间虫量急剧下降,6—9月间以白卵在田间硬物如土块、石块等处越夏。白卵是麦长腿蜘蛛越夏的唯一虫态。10月中下旬越夏白卵大量孵化(当年秋季可孵化80％左右,来春又可孵化3％ The name of wheat spider Xiaoqing red spider, mainly wheat long legs spider and wheat round spider two. In recent years, both spiders in our province have varying degrees of occurrence. To wheat long legs spider occurred heavier, long-lasting harm, becoming the focus of prevention and treatment. Wheat long leg spiders occur in our province 3-4 generations a year, with adult and eggs overwintering. In mid-to-late February in southern Hebei, adults started to act and the overwintering eggs began to hatch. In mid-March, the population density gradually increased. From mid-April to early May, the density of wheat fields was the highest. This period is heading for wheat booting period. Therefore, it often results in a drastic reduction of production. In mid to late May, the amount of insect in the field dropped sharply. In the period from June to September, the white eggs landed on the field hard objects such as soil blocks and stones. White egg is the only long-legged spider mallard insect state. In late October, more summer white eggs hatch (when the fall can hatch about 80%, spring and hatch 3%