|scientific name Monochamus |
Species can be found in coniferous forests.
Adults can be active from April to September (Linsley and Chemsak, 1984).
Adults can be moderate to large sized. Head rectangular with eyes having a distinct notch at the top near the antennae. Mandibles and genae long. Antennae usually twice as long as body in males and relatively as long as body in females. Coxal cavities can be either open or closed from behind (Linsley and Chemsak 1984). Genus is distinguished by large lateral projections on the pronotum, course wrinkled base of elytra, long antennae and elongated front legs of males (Raske, 1972).
Females will lay eggs into chewed notches of dead or dying trees. The larvae will emerge and feed for 1-2 months between the bark and wood. The larvae will then enter into the wood and form a pupal cell. The adult will eventually emerge and feed on coniferous needles and bark. Life cycles can be one year or two in the more northern areas (Raske, 1972). A good way of telling if a tree is infested by Monochamus is if the base of a tree is surrounded by wood chips and frass, which are expelled through holes in the bark (Ives and Wong, 1988).
Monochamus are characteristically pine feeders but are also known to feed on spruce, true firs, Douglas firs and tamarack. Larvae will feed and form u-shaped excavation tunnels in the sapwood and heartwood of coniferous trees (Ives and Wong, 1988).
Monochamus species can be found through out Canada and the United States (Linsley and Chemsak, 1984).
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