Entomology is a branch of zoology concerned with the study of insects. The discipline of entomology can include the biology and control of insects, as well as their ecology and impact on animals, plants, and human health. Medical entomology has a broader scope that it incorporates other arthropods that may affect human health. Medical entomology plays a large part in medical research, particularly in the field of mosquito-borne diseases: dengue, malaria, lymphatic filariasis, and so on. Other medically-important arthropods including spiders, mites, ticks and also come under the scope of a medical entomology. In area concerned with medical research and how insects are a matter of public health, the scope of medical entomology will also cover research into the effectiveness of, and development of new, pesticides.
Insect species can sometimes play a part in criminal investigation and even be included as part of the evidence (forensic entomology). Insects are attracted to decomposing bodies and may begin feeding off it or laying eggs in it. By understanding the lifecycle process of any insect remains found, investigators can identify how long a body has been dead, where it has been storied and a variety of other facts. This is one of the most critical areas in which entomology contributes to our understanding of human remains.
Insects are a vital part of biodiversity and they are particularly sensitive to changes in the climate and the physical environment. Entomology researchers rely heavily on the relationship between insect groups, between insects and the environment, between insects and other animal species. The population numbers and density are often useful to suggest specific environmental indicators.