[Objectives]  To determine the relative attractiveness of different solar light source wavelengths to Monochamus alternatus, and to evaluate the benefits of using a combination of a solar light source and an attractant. [Methods]  The attractiveness of 10 different light wavelengths (365-370、370-375、380-385、390-395、395-400、400-405、405-420、515-520、580-590 and 600-610 nm) to M. alternatus, and that of a combination of a solar light source and an attractant, were quantified and compared. [Results]  A wavelength of 380-385 nm was significantly better than all other wavelengths tested for trapping M. alternatus. The combination of a solar light source and F₂ attractant captured significantly more M. alternatus（P<0.05）, on average, (21.83±10.65) individuals per trap; 35% more than the number captured using only attractant and 5.9 times more than when using only a solar light source. In addition, the female-to-male ratio captured by the attractant was 2.4∶1, whereas the female-to-male ratio trapped using a solar light source alone was 1.7∶1. [Conclusion]  Using a combination of a solar light source and an attractant trapped significantly more insects than using an attractant alone. This finding can potentially improve the control of M. alternatus, thereby reducing the transmission of pine wood nematode disease.