Nicotine pesticide refers to pesticides that contain nicotine as their active ingredient. Historically, nicotine has been used as a pesticide due to its toxic effects on insects. However, its use as a pesticide has declined significantly due to safety concerns and the availability of more effective and safer alternatives. Nicotine-based pesticides work by interfering with the nervous system of insects, leading to paralysis and ultimately death. While nicotine pesticides were once widely used in agriculture, their usage is now limited and highly regulated due to their toxicity to humans, animals, and the environment. Additionally, many countries have banned or restricted the use of nicotine pesticides due to health and environmental risks.