棉花红铃虫的发生及防治河南省农业学校杜红一发生危害棉花红铃虫俗称花虫、红虫、棉花蛆等。是棉花三大蛀食性害虫之一，在我省各棉区发生较普遍。在棉花上该虫以幼虫危害蕾、花、铃和棉籽。危害蕾花时，可直接造成蕾花的脱落。较大花蕾被害后虽能生长，但花瓣常被幼虫吐... Occurrence and control of cotton bollworm Du Hongyi Agricultural School of Henan Province Hazard Cotton Bollworm commonly known as flower insects, red worms, cotton maggots and so on. One of the three major pest infestation pests in cotton in our province occurred more common. The worm infects larvae on cotton, buds, flowers, bells and cottonseed. Hazard of flower buds, flower buds can be directly caused by the fall. Although the larger flower buds can grow after the victims, but petals often spit larvae ...