节肢动物门包括许多昆虫纲和蜘蛛纲,例如螨和壁虱等都是家畜的体外寄生虫。它们可使家畜感染引起过敏,从而导致体重下降、产奶量降低、皮毛损伤。此外,许多节肢动物是动物疾病或人类多种疾病的传染媒介。体外寄生虫严重影响家畜的品质和健康,因此,对其有效控制显得十分必要。随着人们对体外寄生虫认识的日益深入,对可以有效控制它们的药剂的需求亦日益迫切,这些药剂能够安全地用于牧场家畜、群居性动物以及家庭和建筑物中,本文将这些化学品统称为杀外寄生虫剂。 杀外寄生虫剂的选择和使用很大程度上取决于牧业管理习惯和寄生虫的类别。长期生活在寄主上的寄生虫,例如虱和螨,相对容易控制,一旦根除后, Arthropoda includes many insects and arachnids, such as mites and ticks are ectoparasites of domestic animals. They can cause allergies to livestock infections, leading to weight loss, reduced milk production and fur damage. In addition, many arthropods are vectors of animal diseases or various human diseases. Ectoparasite seriously affects the quality and health of domestic animals, therefore, effective control of it is necessary. As people become more familiar with ectoparasites, there is an increasing demand for agents that can effectively control them. These agents can be safely used in pasture livestock, gregarious animals, and in homes and buildings. In this paper, these chemicals Collectively referred to as killing parasiticides. The choice and use of ectoparasiticides depends largely on the type of pastoral management practices and parasites. Parasites that have long lived on hosts, such as lice and mites, are relatively easy to control and, once eradicated,