论文部分内容阅读
一、棉花害虫 (一)害虫: 1.棉铃虫和土产芽虫*Heliothis punctiger Wallengren(实夜蛾属之一种):这两种害虫在外形、习性和生活环境方面非常相似,卵均呈珍珠白色。老熟的棉铃虫幼虫体色由浅绿至褐色,土产芽虫的幼虫体色由灰白至暗绿。新羽化的棉铃虫蛾前翅中部有一明显的肾形斑,而土产芽虫翅上的斑则是弥漫的。棉铃虫后翅黑带的中部向后缘处有一灰白块,而土
I. Cotton pests (a) Pests: 1. Helicoverpa armigera and native budworm * Heliothis punctiger Wallengren (a species of the genus Solidago): The two pests are very similar in shape, habit and living environment, white. The mature cotton bollworm larva body color from light green to brown, native budworm larva body color from gray to dark green. The newly emerged bollworm moth had a clear kidney-shaped placenta in the middle of the fore wing, while the plaques on indigenous budworms were diffuse. The central part of the black-bellied cotton-beetle hind-wing has a grayish white block at the posterior edge, while the soil