ABSTRACT
Insect repellents are chemicals that cause insects to make directed, oriented movements away from the source of the repellent. In light of disease transmission by insects and other arthropods, chemical substances that have repellent effects or interfere with biting are wonderful because they enable us to go places and do things in insect-or disease-infested areas. Undoubtedly, repellents have prevented thousands of cases of
I. Introduction ......................................................................................................465
