Conditional sex conversion systems for improved control of insect pests

Conditional female-to-male sex conversion systems are promising tools for improving the Sterile Insect Technique, an environmentally-friendly form of genetic pest control. In recent years, several conditional sex conversion systems, employing various effector genes and gene expression techniques, have been designed and evaluated in diverse insect species. While no system described thus far is ready for real-world use, valuable insight into insect physiology and sex determination has been gained. Additional basic research on insect sex determination mechanisms, particularly dosage compensation, coupled with increasingly flexible and powerful tools for gene expression and editing, should enable researchers to improve existing sex conversion systems, as well as to develop new systems in non-model insect pests.