After World War II the use of pesticides mushroomed, but with all the benefits of the use pesticides, it has adverse side effects not just on humans but also in animals. An over-reliance on chemical pesticides led to the development of pesticide resistance, development of multiple resistance, the emergence of a secondary pest as major pests, the resurgence of pests, elimination of natural enemies of pests, hazards to nontarget species, hazards to agricultural workmen and deleterious effects on the environment.
