笔者日前从内蒙古自治区森林病虫害防治检疫站获悉,今年入夏以来,在兴安盟科尔沁右翼前旗的天然林柞树上出现了一种突发性食叶害虫,经查证叫柞褐叶螟,属鳞翅目螟蛾科。据介绍,柞褐叶螟在科右前旗首次发生。柞褐叶螟是爆发性食叶害虫,主要危害柞树,具有来势猛、食量大、取食快等特点。每株虫口密度几十条至上百头,几日内进入危害高峰期,其存在之处将柞树叶全食光,呈现“夏树冬景”现象,轻者影响生长,重者造成枯梢或树木死亡。主要发生在天然次生林和农田附近柞树林,远山向阳处和高山柞林也有分布。根据索伦林场的调查报告,发 Recently, the author learned from the Inner Mongolia Autonomous Region Forest Pest and Disease Prevention and Quarantine Station that since the beginning of this year, a sudden leaf-feeding pest appeared on the natural forest oak tree in the Horqin Right Wing Banner of Xingan League. After being verified as a brown leaf miner, Diptera Pyralidae. According to reports, oak brown leaf borer in Section Right before the first flag. Oak brown leaf borer is an explosive leaf insect pests, the main hazards oak tree, with fierce Meng, food intake, fast feeding and so on. Each insect population density of dozens of top 100, a few days into the peak of danger, the existence of the whole edible oak leaves, showing “summer tree winter landscape ” phenomenon, the light of the impact of growth, severe cases cause dead or dead trees . Mainly occurs in the natural secondary forests and oak trees near the farmland, distant mountains and alpine oak forests are also distributed. According to the Soren Farm survey, made