【摘要】 <正> 乌桕的食叶害虫种类颇多,在闽北永安、建阳一带,食害比较严重者首推大桕蚕与小桕蚕。而前一种在上述两地,已发现有大量发生的现象。 有关大桕蚕的观察记载,最早可能是Donovan(1842);往後有Sowerby(1925,1928)和Chan(1929),尤其後者曾经发表了相当详细的研究报告。从经济观点出发,他们是着重於丝茧的应用;笔者等却为歼除害虫、保护乌桕生长起见,前後在永更多还原

【Abstract】 The giant wild silk-worm, Attacus atlas (Linn.), is one of the largest mothsin the world. It is the most/injurious pest of the tallow tree, Sapium sebiferumRoxb.. In the years 1941, 1944, 1953 and 1945, this insect was particularly abundantand destructive in North Fukien, such as Yung-an and Kien-yang districts. Every year, this insect has two generations in North Fukien. It winters aspupa on its host plants. The larvae feed on the leaves of the tallow tree andthe new shoots as well, and thereby check the growth and development of thetree seriously. These injuries are especially conspicuous among nursery stockand young trees. Besides the tallow tree, the larvae also feed on the leaves ofthe willow tree, camphor tree, siris tree, etc.. Among these hosts, the injury isseverest to the tallow tree. The writers made a study on the life history of this insect. Preliminaryexperiments on control measures are also mentioned. Hand-picking, or sprayingwith 666, DDT or arsenates gives very good results for control.更多还原