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苧麻黄蛱蝶(Pariba vesta Fab.)俗称麻虫,是我县的重要害虫。1959—1965年我们对其生活习性进行了观察,并在全县采取了综合防治措施,基本上控制住虫害。现将工作结果分述如下。 生 活 习 性 黄蛱蝶在我县一年发生两代。三麻收割后以五、六龄幼虫于11月上、中旬迁移到麻地边、山坡杂草及土缝等处越冬。翌年3月中、下旬开始活动并为害头麻,4月上旬是第一次为害高峰,5月上、中旬化蛹,下旬羽化成虫。6月上旬为第一代幼虫孵化盛期,为害二麻,出现第二次为害高峰,9月上、中旬为第二代幼虫孵化盛期,为害三麻,出现第三次为害高峰。
The ramie (Pariba vesta Fab.) Commonly known as the worm, is an important pest in my county. From 1959 to 1965, we observed their habits and adopted comprehensive prevention and control measures throughout the county to basically control pests. Now the work results are described below. Livelihood yellow butterfly occurs in our county two generations a year. After harvesting three Ma to five or six instar larvae in November, mid to migrate to Ma side, hillside weeds and soil seams and other overwintering. The following year in mid-March, late start activities and harm head Ma, early April is the first peak of damage in May on the mid-pupa, eclosion adult. In early June, the first-generation larvae hatched peak, damaging the second one, and the second peak appeared. In the middle and upper part of September, the second-generation larvae hatched and the third trimester damaging.