Abstract  [Aim]  To study the effects of different sustained release carriers on the semio-chemical lures used to trap Monochamus alternatus, and thereby provide a basis for the development of bionic lures with more sustained release of insect sex pheromones and host volatiles. [Methods]  The effects of different sustained release carriers (LDPE caps, polymicro and rubber stoppers) on the persistence of sex pheromone lures were tested and different thicknesses (0.06, 0.08, 0.12 and 0.16 mm) of the optimal sustained release carrier compared. In addition, we tested the effectiveness of different density LDPE bottles (low-density 0.08 mm, low-density 0.12 mm, low-density 0.l5mm and high-density 0.15mm) and the effect of pheromone trapping effect on botanical pheromones. [Results]  The LDPE cap was the best sustained release carrier, and the optimum cap thickness was 0.08 mm. In addition, low-density LDPE bottles performed significantly better than high-density LDPE bottles. [Conclusion]  The type of sustained release carrier can significantly affect trap performance.