害虫的取食器官为口器。害虫用口器取食农作物的果实、根、茎和叶、致使作物减产。农业害虫的口器主要分为咀嚼式和刺吸式两种,具有咀嚼式口器的害虫有金龟子、蝗虫等多种害虫的幼虫,它们以取食固体食物为主。对这类害虫应选用具有胃毒或触杀作用的农药进行防治,如用敌百虫、辛硫磷、拟除虫菊酯类等杀虫剂。 Pests feeding organs for the mouthparts. Pests feed on the fruits, roots, stems and leaves of crops with mouthparts, resulting in reduced production of crops. Agricultural pests mouthparts are mainly divided into two types of chewing and sucking suction, chewing mouthparts pests have chafers, locusts and other pests of larvae, which mainly to feed on solid foods. For such pests should be used with stomach poisoning or contact with the role of pesticides for prevention and treatment, such as trichlorfon, phoxim, pyrethroids and other insecticides.