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三带尺蛾(Zethenia rufescentria Mot-schulsky)是我县人工落叶松林的大害虫之一。1974年秋曾在一面坡林场大发生,针叶被吃光,形似火烧,危害面积达3,000多亩。虫口密度平均达570条/株。为摸清三带尺蛾的生物学特性及发生规律,以便有效地控制其大发生,我站1975年对三带尺蛾进行了观察研究及大面积防治试验。1.形态特征成虫:体长11—15毫米,体黄褐色。翅展36—40毫米,前翅黄褐色,顶角处外缘向内凹陷,M_3脉外缘向外突出,内、中、外横线均带状,波浪形,内、中横线褐色,外横线灰白色,有的不清晰,中室端部有一褐点。后翅灰白色,亚外缘线褐色波状,外缘锯齿形,中室有一褐点。触角雄蛾微毛状,雌蛾丝状。卵:初产为黄绿色,约2—3天后变紫褐
Zethenia rufescentria Mot-schulsky is one of the major pests of Artificial Larix forests in our county. In the autumn of 1974, a large slope forest farm occurred, the needles were eaten, shaped like a fire, harming an area of 3,000 mu. Insect population average density of 570 / strain. In order to find out the biological characteristics and occurrence rules of the three-banded moth in order to effectively control its occurrence, I observed and studied the large-scale control experiment on the three-banded moth in 1975. 1. Morphological characteristics Adult: body length 11-15 mm, body tan. Wingspan 36-40 mm, the forewing tan, the outer corner of the vertex inward depression, M_3 pulse outward protruding, the middle and outer horizontal lines were banded, wavy, inner and outer horizontal brown, outside Off-line gray, and some not clear, the room has a brown spot at the end. Hind wings gray-white, the outer edge of the brown wavy, jagged outer edge, a brown spot in the room. Male antennae moth hairy, female moth filamentous. Eggs: primiparous yellowish green, purple brown after about 2-3 days