Lowering vector competence in insects: a review

Abstract

Insects act as disease vectors, spreading disease-causing organisms between plants and animals. There have been studies devoted to determining ways to control these pests. One of the most effective ways to accomplish this is to reduce their vector competency. This review article explains how these factors can reduce vector competency. The major ways by which vector competence can be reduced were reviewed. Entomopathogens are organisms that cause disease in arthropods like insects, mites, and ticks. Wolbachia is a genus of intracellular bacteria that mostly infects arthropods, including a significant number of insects. It is one of the most frequent insect reproductive parasites that kill or severely disables insects. Entomopathogenic nematodes are a type of worm that attacks insects and kills them. Insect-specific viruses are a relatively new class of viruses with a variety of intriguing traits that could be used to better understand and possibly inhibit arbovirus transmission. Entomopathogenic fungi are a type of fungus that kills insects by attacking and infecting their insect hosts. Disrupting the environment and nutrition of insects could also help to reduce their ability to spread diseases to humans, animals, and plants. Chemical control has been one of the most widely used methods for controlling disease vectors, but there have been reports of insect resistance, environmental degradation, and a variety of other side effects. Instead of chemical control, there are a variety of techniques that can be used, including targeting insects' endosymbionts (bacteria, viruses, fungi, nematodes, and protozoa), changing insects' nutrition, manipulating their environment, and many others. This paper discussed the alternative ways to reduce vectors’ competence without the use of synthetic chemical.