Wyoming Pesticide Applicator Certification Practice Test

Animal systemics primarily control internal parasites in animals. This is because animal systemics are medications that are used to treat and prevent infestations of internal parasites in animals. These parasites can cause serious health issues in animals and can lead to loss of productivity in livestock. The other options listed are incorrect because they do not pertain to the primary purpose of animal systemics. Choice A, weed growth, is not controlled by animal systemics, and is instead controlled by herbicides. Choice C, plant diseases, is controlled by fungicides and other plant-specific treatments. Choice D, insect pests in agricultural fields, is controlled by insecticides. Animal systemics are specifically designed to target internal parasites in animals and are not effective for controlling weeds, plant diseases, or insect pests in agricultural fields.