As soon as the pathogen of nematode was known, Monochamus alternatus, sawyer beetle, it had been one of the noticed insects because this sawyer found frequently dead pine trees, prove the important vector of the nematode and know that the nematode infected healthy pine trees [REF].
The pine wilt nematode is vectored by a number of bark beetles and wood borers, and is most often associated with beetles in the genus Monochamus, the pine sawyers.