Chemical factors affecting the number of Bursaphelenchus xylophilus carried by Monochamus alternatus and Acanthocinus griseus

Abstract

We examined the factors affecting the number of pinewood nematodes (Bursaphelenchus xylophilus) carried by Monochamus alternatus and Acanthocinus griseus which emerged from pine wilt-killed trees in Ibaraki in 2002. M. alternatus carried a great number of nematodes, while A. giseus carried few nematodes. The number of nematodes carried by M. alternatus ranged from 0 to 60,500. We discuss the effects of i) secondary metabolites of the beetles and ii) blue-stain fungi around their pupal chambers.