危害农作物的“虫子”很多,有昆虫、螨类、蜗牛等等。昆虫属节肢动物门、昆虫纲,螨类属节肢动物门、蛛形纲。两者虽同属一门,但不属一纲,因而它们之间既有着不少相同之处,也存在诸多差异之点。一、准确掌握螨类特点螨类的特点可概括为:体不分节一团球,无翅善爬八只足;气管血腔 Insects, mites, snails and many other “insects” that endanger crops. Insects are arthropods, insects, mites belong to arthropods, arachnids. Although both belong to the same category, they are not of the same class. Therefore, there are many similarities between them and there are also many differences between them. First, accurate grasp of the characteristics of mites mites characteristics can be summarized as follows: the body does not distinguish between a ball, wingless good climb eight feet; tracheal blood cavity