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杨尺蠖是我场近几年来杨树主要害虫,每年4月中旬至5月上旬危害树芽、嫩叶,严重时一树有虫达千条以上,把整株树叶咬食殆尽,使长势衰弱,且易引起杨树溃疡病和腐烂病,致使整株死亡。为了保障林木的正常生长,几年来对杨尺蠖进行了观察,并开展大面积防治。现将观察及防治情况整理如下,提供参考。一、形态略述(一)成虫.雌雄异态。雌蛾无翅,体呈纺锤形,头和胸部较小,腹部肥大,体长10—16毫米,触角丝状,蛾体密布灰褐色绒毛,足细长,善爬行。雄蛾有翅,展翅28—38毫米,体长9—14毫米,触角羽毛状,前翅三角形,灰褐色,中部有黑色鳞片,并具波状纹三条,后翅灰白色。
Yang Ruyi is my field in recent years the main pests of poplar, from mid-April to early May each year endanger tree buds, young leaves, serious when a tree has more than a thousand insects, the whole leaves biting exhausted, so that the growth Weak, and easy to cause poplar canker disease and rot disease, resulting in death of the entire plant. In order to ensure the normal growth of forest trees, Yang Zhaoxi was observed for several years and a large area of prevention and control was carried out. Now observe and prevent the situation as follows, provide a reference. First, the shape outlined (a) adult. Female wingless, spindle-shaped body, smaller head and chest, abdomen hypertrophy, body length 10-16 mm, antennae filamentous, moth body gray-brown hair, enough slender, good crawling. Male moth winged, wings 28-38 mm, length 9-14 mm, antennae feather-like, forewing triangle, taupe, the central black scales, and wavy three, after the wing gray.