The term used for reducing pest populations to a level where their effects are tolerable and acceptable is IRM - Integrated pest management. This measure is defined as ''the careful consideration of all pest control techniques and subsequent integration of appropriate measures that discourage the development of pest population and keep pesticides and other interventions to a level where they are economically justified and reduce or minimize risks to human health and environment. IRM emphasizes the growth of a healthy crop with the least possible disruption to agro-ecosystems and encourages natural pest control mechanisms''