Insecticide resistance is a phenomenon where insects develop the ability to survive exposure to insecticides that were previously effective in controlling their populations. This resistance can be due to a variety of genetic, physiological, or behavioral mechanisms, such as mutations in target sites, increased detoxification enzymes, or behavioral avoidance of treated areas. This poses a significant challenge for pest control efforts in agriculture, public health, and veterinary medicine, as it reduces the efficacy of insecticides and increases the likelihood of insect pests causing damage or spreading diseases. Researchers study insecticide resistance to understand its mechanisms, monitor its spread, and develop strategies to manage and mitigate its impact on pest control.