Stink Bugs

Here in the PNW, Brown Marmorated Stink Bugs can become a problem if ignored.

Brown Marmorated Stink Bug

Brown Marmorated Stink Bug
Brown Marmorated Stink Bug

Brown marmorated stink bug (BMSB) overwinters as adults in a protective sleeplike state, emerges in the spring, and begins mating in about two weeks. BMSB commonly mates multiple times, and the female may deposit as many as about 486 eggs in a lifetime. Development from egg to adult requires approximately 538 degree days, a measure of temperature and time for insect growth, with an additional 148 degree day period before eggs are laid. Its light-green eggs are often laid on the underside of leaves, deposited in masses of approximately 28 eggs.


Please visit the "Stop BMSB" web site at for more details

Degree Day Model Link:

Wikipedia on Degree day:


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