Imidacloprid is one of the most widely used insecticide ingredient in the world. It is a neonicotinoid ingredient that acts as a neurotoxin when it acts on pests. Its mode of action is similar to that of nicotine, a common ingredient in tobacco. The ingestion of imidacloprid causes the blockage of stimulation transmission in the insect’s nervous system. Such blockage will then lead to a build-up of acetylcholine in the insect. When acetylcholine builds up to a certain level, it will paralyze and kill the infected pests. Therefore, there is a lag in the effect of imidacloprid. Pests usually stop feeding within a few hours of the ingestion of this ingredient and die within 1-2 days.