日本隐石蛛生物学特性观察

Bionomics of Titanoeca nipponica Yaginuma

日本隐石蛛Titanoeca nipponica Yaginuma是多种害虫的重要天敌。在鲁东南沿海地区1a发生1代，以不同龄的若蛛在乱石板下，落叶杂草丛中越冬。翌年3月上旬出蛰，4月中旬发育至成蛛，开始交配。5月上旬开始产卵、孵化，10月中旬产卵孵化结束。卵期13（11～15）d，若蛛期326．2d，成蛛期58．4d。雌雄比为5：1。成蛛日均食小绿叶蝉4．5头。

Titanoeca nipponica Yaginuma is an important natural enemy predating many species of pest insects. It has one generation a year in the southeast coastal area of Shandong Province and overwinters as spiderlings at different instars in litter and weeds. It revives in the first ten days of March the next year and begins to develope into adult and mate in mid April. The oviposition and hatching begins in the first ten days of May and ends in mid October. The egg stage, spiderling stage and adult stage last for 13（ 11 - 15） ,326. 2 and 58.4 days respectively. The ratio of female to male is 5： 1. One adult predates 4.5 smaller green leafhoppers （ Empoasce flavescens） a day on average.