【摘要】 檎斑蛾(Illberis ulmivora Graeser)是榆树的重要害虫。此虫一年一代,以蛹在建筑物和堆积物等缝隙中中越冬。6月中旬成虫大量羽化,卵块产于叶背,单雌产卵173粒,7月为幼虫为害盛期,幼虫六令,有群集,吐丝下垂和转移为害等习性。成虫寿命5.4天,卵期12.7天,幼虫期54.2天,蛹期281天.用澳氰菊脂喷施,氧化乐果涂干,杀虫效果最好。1980年以来,我省忻定盆地和太原盆地四旁绿化的榆树连年遭受榆斑蛾的严重为害,大面积树叶被其幼虫吃光。据1981年调查,仅忻州地区发生面积就有10.5万亩,严重受害的榆树达650万余株。每标准树平均虫口密度达19,690头,多者达57.963头。被害植株虽不致死,但生长势大为减弱,翌年不结榆钱,若累遭其害,再加蛀干虫害,死亡亦难幸免。且幼虫毒毛触着人肌肤可引起痒痛发炎。有机榆斑蛾的研究,前人研究甚少。北京农大植保系昆虫教研组(1977)描述了成虫的形态特征,朱弘复等(1979)记述了幼虫的特征,但有关其生物学和防治方面国内外尚未见系统报道。作者于1981—1985年进行了该项研究。现报告如下。更多还原

【Abstract】 Illiberis ulmivora Graeser is an important leaf-eating pest of elm tree in Shanxi province. This insect has one generation a year and the pupa of it can overwinter. Adults begin emerging in the late of May. Each female lays about 173 eggs. Larvae which has the habit of aggregation damaging, have six instars. The adult life-span is about 5.4 days. The egg stage lasts 12.7 days; the larve stage lasts 54.2 days; the pupa stage lasts 281 days. Chemical control test showed that it was the best effect of control to use decis to spray or omethoate to paint the trunk.更多还原