Several medical and agricultural entomology studies on insect repellents have been spurred by the long-term study of the general interest in ecologically friendly pest management strategies. Drosophila has been eradicated in the majority of developed nations with the right adoption of pest management techniques and awareness of the proliferation of unpleasant insects like mosquitoes, but emerging nations are still having difficulties. Consequently, in the last ten years, the amount of in-depth research on the topic has dramatically expanded. Insect frass accumulates as a considerable byproduct in artificial rearing settings and can supplement or replace commercial fertilizers. Insects are not harmful to soil hygiene and can be used to provide nutrients to the soil. The development of biological repellents using insect by-products from insects like the Black Soldier Fly (BSF), Drosophila, and Weaver ants has received comparatively little attention. Their conspicuous qualities, which tend to exhibit potential characteristics, might be taken into account as one of the key factors in their selection as pest repellents. We discussed many types of repulsive using the olfactory route, particular receptors, excellency, irritancy, deterrence, smell masking, and visual masking as action mechanisms, and we intend to describe behavioural bioassays to separate them.