Species in this genus range in length from 1.8 to 4.0 mm and are 1.8 to 2.0 times as long as they are broad.
Adult beetles are oval, grey, and brown beetles around 2-3 mm (1/8 inch) in length.
The larvae are white, C-shaped grubs with a brown head inside the tree.
Host plants:
Fraxinus, Juglans, Ulmus, Olea, and Quercus, among others
Territory:
Criddle’s Bark Beetle is found in North America, Guatemala, Europe, Asia Australia.
Damage caused by Criddle’s Bark Beetle:
Ash bark beetles cause problems on ash trees in the Edmonton region. The Western ash bark beetle is the most prevalent and destructive species in this area (Hylesinus californicus).This bug burrows into the bark and wood of ash trees. Burrowing girdle branches, causing the leaves to become yellow. Beetles typically attack dead or weakening branches, but beetle populations can reach epidemic levels during times of drought or other stress. As the assaults progress, branch dieback may worsen until beetles attack and encircle the trunk, ending in tree death.
Life history and Habits:
Adult beetles spend the winter under the bark of ash tree trunks in the bottom 15 cm (six inches). To catch beetles that emerge in early April, put an adhesive band around the trunk approximately 30 cm (12 inches) above the ground. A fresh band planted in early September may catch some of the beetles as they make their way down the trunk to overwintering places.
