Je. Warren et Mj. Lint, EFFECT OF MONOCHAMUS-CAROLINENSIS ON THE LIFE-HISTORY OF THE PINEWOODNEMATODE, BURSAPHELENCHUS-XYLOPHILUS, Journal of nematology, 25(4), 1993, pp. 703-709
The development of Bursaphelenchus xylophilus in pine wood infested wi
th and free of Monochamus carolinensis was investigated. Formation of
third-stage dispersal juveniles occurred in the presence and absence o
f pine sawyer beetles. The proportion of third-stage dispersal juvenil
es in the total nematode population was negatively correlated with moi
sture content of the wood. Formation of nematode dauer juveniles was d
ependent on the presence of the pine sawyer beetle. Dauer juveniles we
re present in 3 of 315 wood samples taken from non-beetle-infested Sco
ts pine bolts and 81 of 311 samples taken from beetle-infested bolts.
Nematode densities were greater in wood samples taken adjacent to inse
ct larvae, pupae, and teneral adults compared with samples taken from
areas void of insect activity. Nematodes recovered from beetle larvae,
pupae, and teneral adults were mostly fourth-stage dauer juveniles, a
lthough some third-stage dispersal juveniles were also recovered. Daue
r juvenile density was highest on teneral adult beetles.