【摘要】 2009—2012年在宁夏贺兰山国家级自然保护区,对榆毒蛾的寄主、形态特性、危害特点、危害程度及生活习性等进行了调查。结果表明:榆毒蛾在该地区主要危害灰榆,1年发生2代,不同虫态可出现在同一时期;被害灰榆树叶呈透明、缺刻、孔洞状,严重的整株树叶肉被食光,呈枯死状。榆毒蛾危害最严重的地区在贺兰山汝箕沟,有虫株率为100%,虫口密度达522.2头/株。更多还原

【Abstract】 The host,morphological characteristics,damage characteristic,damage degree and living habit of Ivela ochropoda in Helan mountain national nature reserve were investigated during 2009-2012.The results showed that Ivela ochropoda mainly harmed ash elm in the area.It occurs 2 generations in 1 year and different insect states may occur in the same period.The leaves of the victim ash elm appeared transparent,nicked and hole shaped and when harmed seriously all leaves of the whole plant were eaten and showed a dead plant.The area harmed most seriously in Helan mountain area was Ruqigou and the attack rate was 100% and the larval population density was 522.2 head/plant.更多还原