论文部分内容阅读
棉蚜是棉农的大敌。在广大的棉区里,尤其是华北、东北、西北一带,棉蚜是为害最烈的一种棉害虫。它从棉苗期就开始为害,可以停滞棉株初期的生长。棉株受害以后,棉花产量要减少四成到六成。为了保证棉花增产,配合纺织工业的发展,适应人民的生活需要,必须努力防治棉蚜。棉蚜是一种多食性昆虫。它除了为害棉花之外,还要为害黄瓜等成百种植物。棉蚜吃东西的时候,是用针状的嘴刺入叶子或嫩枝里,吸取植物的汁水。它聚集在
Cotton quilts are the enemy of cotton farmers. In the vast cotton area, especially in the north, northeast, and northwest areas, cotton aphid is the most vicious cotton pest. It begins to damage from the cotton seedling stage and can stop the initial growth of the cotton plant. After the cotton plant is victimized, the cotton yield will be reduced by 40% to 60%. In order to ensure the increase of production of cotton, in line with the development of the textile industry and to meet the needs of people’s lives, efforts must be made to combat cotton aphid. Cotton aphid is a polyphagous insect. In addition to harming cotton, it also kills hundreds of plants such as cucumbers. When a cotton-padded jacket eats something, it uses a needle-like mouth to pierce the leaves or twigs and suck the plant’s juice. It gathers in