Carbophenothion is a highly toxic organophosphate insecticide used as a citrus pesticide called Trithion. Carbophenothion is a potent inhibitor of acetylcholinesterase, a neuromuscular enzyme that is widely needed for the normal function of insects, as well as people and many other animals. The Environmental Protection Agency (EPA) classifies it as a Restricted Pesticide (RUP). Carbophenothion is used in various brands, such as Trithion. This pesticide contains 80% Carbophenothion as its only active ingredient. Due to the widespread use of these organophosphates in the United States in the nineties, this was the most common cause of agricultural poisoning. Carbophenothion is used as an insecticide and acaricide, the main purpose of which is to protect citrus fruits, but also to protect the cotton from aphids (lice) and spider mites. In addition, it is used in combination with oil, and also as a pesticide against many other pests on fruits, nuts, vegetables, sorghum, corn, and others. In addition, it is used to combat animal parasites.