摘要
本文查明内蒙古后山（阴山山脉以北及大兴安岭岭北）地区为害油菜的跳甲共有６种，内蒙古中、西部以黄宽条跳甲Ｐｈｙｌｌｏｔｒｅｔａｈｕ一ｍｉｌｉｓＷｅｉｓｅ为优势种，呼伦贝尔盟岭北地区主要种类是黄曲条跳甲ＰｈｙｌｌｏｔｒｅａｔａｓｔｒｉｏｌａｔａＦａｂ一ｒｉｃｉｕｓ。黄宽条跳甲在后山地区每年发生１代，以成虫越冬。翌年６月上、中旬大量发生为害，主要咬食刚出土的幼苗。药剂试验结果表明，４０％甲基异柳磷乳油按种子重量的０．５％和０．８％用药量（商品量）拌种，３５％大扶农种衣剂按种子重量的０．３％和０．５％用药量（商品量）拌种，在播后２５ｄ，其校正死亡率达到８１．１％以上，相对防效达９５．４％以上，大面积防治效果平均达９６．６％。
This paper ascertained that there are all six species of flea beetlesinjuring rape in the Houshan region of Inner Mongolia(north to the Yenshan Mountainsand west to the Daxinanlin Mountains).Phyllotreta humilis Weise is a dominant speciesin the central and western Inner Mongolia. The major species is Phyllotreta striolataFabricius in the northern region of Huluenbeir League. P. humilis occurs one generationeach year in the Houshan region,overwinters by adultes,and appears magnanimously in the early and middle June,mainly biting the seedlings which have just grown above thesoil.The experiment results showed that in twenty一five days after sowing,thepopulation decrease rate exceeded 81.1%,the relative control efficiency was above 95. 4%,and the average large area control efficiency was up to 96.6%by seed dressing withisofenphos一ethyl 40EC at 0.5%and 0.8%by seed weight,and with carbofuran 35SD at0.3%and 0.5%by seed weight.
