The Pine Wood Nematode in Jack Pine Infected with Dwarf Mistletoe

Bursaphelenchus xylophilus was found only in declining or dead jack pine infested with Arceuthobium americanum. All trees containing Bursaphelenchus xylophilus were also in- fested with cerambycid beetles, bark beetles, and blue stain fungi. Arceuthobium americanum appeared to be the primary cause of tree mortality. Bursaphelenchus xylophilus was extracted from a dead jack pine, then increased on Botrytis cinerea and inoculated into 3-year-old seedlings