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梨星毛虫(Illideris pruni Dyar),属鳞翅目,斑蛾科,亦称梨叶斑蛾。俗称饺子虫、包叶虫等。省内各果区均有发生,主要为害苹果、梨、沙果等果树。轻者影响树势,使果品产量下降;重者食尽叶片叶肉,残留叶脉及下表皮,似火烧状,提前落叶,严重影响花芽形成,甚至翌年无收。本文是笔者曾在榆中园艺场开展果树病虫防治时、结合防治对该虫的生活史与习性进行了观察和试验,现整理于后。一、生活史及习性观察经过两年定点系统观察和普查结果:梨星毛虫在榆中年发生一代,以2龄幼虫在果树粗翘皮隙中结茧越冬。越冬幼虫四月上旬开始活动,由树干爬至枝条,潜伏在芽外鳞片内食害刚
Illideris pruni Dyar (Lepidoptera, Lepidoptera, also known as pear leaf moth). Commonly known as dumplings worms, packworms and so on. All fruit areas in the province have occurred, the main damage to apples, pears, sand and other fruit trees. The light affect the tree potential, so that the decline in fruit production; severe exhaustion of leaf mesophyll, residual veins and the lower epidermis, like fire-like, early deciduous, seriously affecting the formation of flower buds, and even no income the following year. This article is the author in Yuzhong horticultural field to carry out fruit tree pest control, combined with the prevention and control of the pest life history and habits were observed and tested, now finishing. First, the life history and habits observed After two years of systematic observation and census results: Pear caterpillars occur in a generation Yuzhong to 2 instar larvae in the rough skin of fruit trees cocoon wintering. Overwintering larvae started activities in early April, climbed from the trunk to the branches, lurking in the outer scales of the shrimp just eat harm