3-Methyltricosane is primarily utilized in the field of entomology and pest control due to its role as a pheromone or semiochemical. It is commonly employed in the study and management of insect behavior, particularly in attracting or repelling specific species. This compound is often integrated into traps or monitoring systems to control pest populations in agricultural settings, reducing the need for chemical pesticides. Additionally, it is used in research to understand insect communication and mating patterns, aiding in the development of eco-friendly pest management strategies. Its application is crucial in maintaining crop health and minimizing environmental impact.