Aldicarb appears on the restricted-use pesticide list because of its high toxicity to humans and animals. This carbamate pesticide is applied to soil to control insects and nematodes, but it can be dangerous if ingested, inhaled, or absorbed through the skin. Exposure may cause nausea, vomiting, dizziness, confusion, seizures, and respiratory depression, and in severe cases it can be fatal.
Aldicarb also poses risks to birds, fish, and other wildlife. It can contaminate water supplies and soil and may persist in the environment for extended periods. Because of these dangers, aldicarb is available only to certified applicators who have received training in safe pesticide handling.