They inhabit white, Lutz and Sitka spruce but only occasionally the black spruce. The beetles, just a quarter-inch long, can each lay up to 150 eggs in the phloem layer beneath a tree's bark on ...

Its bark is coarser and darker. However, the cones are better indicators. Black spruce cones are pudgy, rarely over an inch long and tend to cluster near the top of the tree. White spruce cones ...

Some species, like white ash, can have ridges ... Many pine and spruce trees have scales of bark, while species like the black birch have thick, irregular plates on their trunks.

Breakthrough in the fight against spruce bark beetles Date: February 16, 2021 Source: Lund University Summary: For the first time, a research team has mapped out exactly what happens when spruce ...

When metabolizing spruce bark, the insect's fungal partners release volatile compounds that bark beetles recognize through specialized olfactory sensory neurons Date: February 21, 2023 ...

Banner image: A forest in the San Juan range of the Rocky Mountains, with dead Engelmann spruce trees alongside live aspen trees. (Credit: Robert Andrus) Bark beetle outbreaks and wildfire alone are ...

Bark beetles may use receptors in their antennae to detect and feast on fungus-infected trees. The Eurasian spruce bark beetle (Ips typographus) – found in Europe, Asia and some parts of Africa ...

Bark beetle-infested spruce trees begin to dry out already before any visible signs of tree mortality appear, a recent study from the University of Eastern Finland shows. Led by Dr Samuli Junttila ...

In a new study, an international research team led by the researchers from the Max Planck Institute for Chemical Ecology demonstrates that the European spruce bark beetle Ips typographus uses volatile ...

For the first time, a research team led by Lund University in Sweden has mapped out exactly what happens when spruce bark beetles use their sense of smell to find trees and partners to reproduce with.