(E)-5-Decen-1-ol is a pheromone component isolated from bark beetles such as Scolytus multistriatus, and it is mostly a chemical communication signal substance released by female individuals; in the application of insect pheromones, it can be used alone or compounded with other trace pheromone components to make attractants, which are used to monitor the population density and diffusion trend of these bark beetles in forestry areas.