黄带山钩蛾食叶量测定及防治指标研究

Leaf consumption of Oreta pulchripes and its control index

黄带山钩蛾Oretapulchripes是法国冬青的食叶害虫。该虫在苏州地区1年发生7代左右，以幼虫越冬；在室内饲养条件下，黄带山钩蛾的卵期为5—6d，幼虫期14—16d，蛹期5—7d，成虫寿命4—10d。幼虫平均食叶量6．167g／头，1～5龄的食叶量分别为0．036g／头，0．096g／头，0．465g／头，1．02g／头，4．55g／头。经过曲线回归分析，得出黄带山钩蛾幼虫发育时间和食叶量的回归关系式，为该虫防治指标的确定提供了有效的科学依据。

Oreta pulchripes was a defoliator infesting Viburnum odoratissimum Ker Gawl. Var. awabuki. It had about 7 generations a year and overwintered as larva in Suzhou area. The result of indoor rearing showed its egg stage was 5-6 d, larval stage was 14-16 d, pupal stage was 5-7 d and adult longevity was 4-10 d. The leaf consumption averaged 6. 167g/larva. The consumption of the 1st to 5th instar larvae was 0. 036,0. 096,0. 465,1.02,4. 55 g/larva respectively. The regression equation of the larval stage and the leaf consumption was established, which provided scientific basis for the determination of the pest control index.