Crepuscular-flight

Guides

• Gnathotrichus retusus

  western pinewood stainer

  Gnathotrichus retusus, commonly known as the western pinewood stainer, is an ambrosia beetle in the family Curculionidae. It is primarily univoltine, with a minimum development time of 40 days from egg to adult in Douglas-fir logs. The species is known to reproduce in both Douglas-fir and western hemlock stumps. Flight activity is strongly crepuscular, with a major peak at dusk and a minor morning peak, regulated primarily by light intensity.

  ambrosia-beetlebark-beetleScolytinaeforest-pestpheromoneDouglas-firwestern-hemlockcrepuscular-flightunivoltine