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大避债蛾(Cryptothelea formosicola.Strand)属(鱼令)翅目,蓑蛾科(Psychidae),是阔叶树的严重害虫之一。几年来,大避债蛾在我区由南向北逐渐蔓延,危害甚大,严重地影响了林木的生长。据调查,我区即墨、莱阳、莱西、掖县、荣城等十多个县都有发生,以莱阳、即墨、莱西、掖县南部发生较重。一、危害情况大避债蛾食性杂,不仅为害多种林木,亦加害多种果树、农作物及蔬菜。阔叶树以泡桐、刺槐、榆树、柳树受害重,杨类次之,国槐、臭椿很轻。大避债蛾的越冬袋囊缠绕枝上,使枝条缠处缢细,损伤输导组织,影响枝条生长。初令幼虫,多集中于枝梢部、叶缘危害。虫令增
Cryptothelea formosicola.Strand is a genus of fish, Psychidae, and is one of the major pests of broadleaf trees. In recent years, the large shelter moth in our area gradually spread from south to north, endangering a great deal, seriously affecting the growth of trees. According to the survey, more than 10 counties such as Jimo, Laiyang, Lacey, Yexian and Rongcheng in our district have occurred, with heavier occurrences in Laiyang, Jimo, Lacey and Yexian areas. First, the hazards of large shelter moth feeding Miscellaneous, not only for a variety of trees, but also against a variety of fruit trees, crops and vegetables. Broad-leaved trees to Paulownia, acacia, elm, willow victims, Yang followed, Sophora japonica, Ailanthus altissima very light. Large shelter moth wintering bag wound branches, so that twigs wrapped around small, damage to the guide tissue, affecting the growth of branches. Early larvae, mostly concentrated in the shoots, leaf margin damage. Insects make increase