【摘要】 为保护利用北国壁钱(Uroctea lesserti),作者从1996年3月~2003年3月在山东日照市沿海地区对其生物学特性进行了观察。结果表明,北国壁钱在该地区一年发生一代,以不同龄的若蛛附着于室内墙壁上、桥洞、山洞内的扁圆钱形巢内越冬。翌年4月上旬出蛰,7月上旬发育至成蛛,开始交配、产卵、孵化。卵期13·5d,若蛛期337·2d,成蛛期106·5d。雌雄比为5∶3。成蛛日食麦蛾(Gelechiidae)5·8头,以多种昆虫为食。更多还原

【Abstract】 For the purpose of protection and utilization of Uroctea lesserti,the observation of its biological characteristics was conducted in the seashore area of Rizhao City,Shandong Province,from 1996 to 2003. The result shows that U.lessert reproduces one generation per year in Shandong Province,China.Hibernation occurs as larva within its self-made oblate sacks on walls or in caves and holes of bridges,emergence in early April the next year; imagines,mating,oviposition and hatching in early July.Its average incubation period is 13.5 days,larva period 337.2 days,and adult period 106.5 days.Its number ratio of male to female is 5∶3. It kills 5.8 gelechiid moth Mordv on average each day.Therefore it is an important natural enemy of various insect pests.It is very sensitive to chemical insecticide.Prohibition of chemical insecticide in rooms and forest is the key to protect the larva and adult U.lessert.更多还原