The unceasing struggle between man and his insect enemies started even before the dawn of civilization. Inspite by the numerous advances made by man in evolving newer and deadlier weapons to fight the war against insects, he has not succeeded in eradicating even one of the thousands of serious pests which damages his food and other agricultural products, destroys his possessions and even attack himself and injure his domestic animals.

Once it is established that an insect is causing economic losses, it becomes necessary to control it.

The first principle underlying the control of an insect is its correct identification. When it is correctly identified, we can refer to the available information on the biology and the habits of the insect and determine its most vulnerable stage, the appropriate time and the most suitable method or methods to control it.

After the discovery of the insecticides properties of DDT in 1939 by Paul Muller, the chemical control of insects has become most popular. As a matter of fact, the method has become so popular that most of the cultivators and extension workers speak only about insecticides, whenever the question of insect control is raised. The main reason for its popularity is the spectacular and immediate results obtained by the due of such chemicals.

Hundreds of insecticides are now available to control different insect pests. These are mainly used as dusts, sprays or granules on the