Biological control of insect pests affecting man and animals in the tropics.

Biological control of pests affecting the health of man and animals is practiced in various forms throughout the tropics. In this paper, the use of parasitic viruses, bacteria, protozoa, predatory arthropods, and fish against pests such as various mosquitoes, tse tse flies, and screwworm flies as published in the literature are reviewed. Mention is also made of the usefulness and applicability of the sterile insect technique, genetic control by chromosomal aberrations, and the exploitation of various incompatabilities. These are reviewed against the background of the present state of technology and limited resources that exist in many tropical countries. Most authors maintain that due to the relative length of time required to get a biological control system working efficiently, and the perennial nature of most tropical pest species, there is often the need to initially reduce the pest population by conventional means. There will thus be a balance between biological and chemical control in most systems. Emphasis is placed on meeting the urgent need for the exchange of research and development information on biological control of pests affecting man and his animals in the tropics.