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棉铃虫是我国重要棉虫之一,威胁棉产很大。它每年发生的轻重程度,固然因素较多,但在黄河流域棉区,第2、3代的为害确与齿唇姬蜂寄生率关系密切。为此,介绍棉铃虫幼虫寄生蜂简况,供棉虫发生量予测工作参考。寄生性益虫一、齿唇姬蜂 Campoletis perd:Stinctus(V.)占幼虫寄生蜂总量60-90%,作用最大。蜂茧丝质,椭圆形,灰黄色,或有黑色豹斑,长约6毫米。常在棉叶或蕾、铃外边结茧。每一棉铃虫尸壳旁只有一茧。成虫蜂黑褐色,长5—6毫米。触
Cotton bollworm is one of the important cotton insects in our country, threatening cotton production is very big. Although the severity of its occurrence each year, although more factors, but in the Yellow River cotton area, the second and third generations of the damage indeed and Labiatae parasitoids close. To this end, the introduction of cotton bollworm parasitic wasp larvae profile, for the occurrence of cotton worms to predict the work of reference. Parasitic beneficial insects First, Campanulaceae Campoletis perd: Stinctus (V) accounted for 60-90% of the total parasitoid larvae, the role of the greatest. Cocoon silk, oval, gray-yellow, or black leopard spots, about 6 mm. Often cotton leaves or buds, cocoon outside the bell. There is only one cocoon beside the boll shell of each bollworm. Adult bees dark brown, 5-6 mm long. touch