|scientific name Dendroctonus simplex |
common name Larch Beetle
Dying or injured trees such as windfall or stumps; may attack live trees.
Flight period is from early May through to late August.
This species has a coarsely punctured but smooth frons, as well as a coarsely punctured pronotum and declivity. It can be distinguished from its closest ally, D. pseudotsugae, by its distribution and smaller size in sympatric regions.
This species overwinters as young adults or as larvae. The mature adults will emerge in the spring to excavate new galleries. The galleries have egg grooves in them but no egg niches. Oviposition will begin in the last week of May. Eggs are laid in groups of 3 to 6 eggs. The eggs hatch within one week and the larvae will then develop with about 27 days. The larvae will then pupate for 7 days. After pupation the adults will spend the remaining time of the year in the gallery, and overwinter. In any given year a mature female may excavate 2 or 3 galleries.
This species is considered to be a minor pest.
This species feeds on Larix laricina (Larch).
This beetle is found across Canada and is also in the US (in AK, ME, MI, MN, NH, NY, VT and WV).
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