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梧桐树是优良的行道树,广泛应用于城市绿化。它树干光滑,枝叶繁茂,叶大优美,遮阴效果好,但梧桐木虱危害较大,大大影响了其观赏效果。笔者经过长期实践,对梧桐木虱的防治积累了一定的经验。梧桐木虱又称青桐木虱、梧桐裂头木虱,属同翅目木虱科。其以若虫、成虫在梧桐叶背或幼嫩干上吸食树液,破坏疏导组织,对幼树危害最大,严重时导致整株叶片发黄,顶梢枯萎。若虫分泌的白色棉絮状蜡质物,将叶面气孔堵塞,影响叶片正常的光合作用和呼吸作用,使叶面呈现苍白萎缩症状;起风时,白色蜡丝随风飘扬,形如飞雾,严重污染周围环境,影响市容市貌。
Plane tree is an excellent road tree, widely used in urban greening. Its trunk is smooth, lush foliage, beautiful leaves, shading effect is good, but parasitic psyllids greater harm, greatly affected its ornamental effect. After long-term practice, I have accumulated some experience in the prevention and treatment of parasitic psyllids. Parasol psyllids, also known as Paulownia psyllid, Indus split lice, Homoptera psylla. Its nymphs, adults in the Indus leaves or young dry on the sucking tree sap damage to divert tissue, the saplings of the most serious, leading to severe yellow leaves whole plant, the top withered. Nymph secretion of white cotton-like waxy material, the leaf stomata clogged, affecting the normal leaf photosynthesis and respiration, so that the leaves showed pale atrophy symptoms; windy, the white wax silk fluttering in the wind, shaped like flying fog, Serious pollution of the surrounding environment, affecting the appearance of the city.