when it is introduced to the tree’s vascular system by the elm bark beetle. It can also be transmitted between trees by naturally occurring root grafts. The pathogen arrived in the United States of ...

Elm bark beetles spread the fungus when they feed or lay eggs under the bark of an elm tree. The fungus grows into the xylem vessels of the tree, blocking water transport, which leads to wilting and ...

Dutch Elm’s Disease is a fungus that arrives to the trees via the backs of two species of bark beetles. The beetles bury into the bark of the tree and lay their eggs. When the larvae hatch, they carry ...

The number of spruce bark beetles has decreased across nearly all of Estonia over the past year, according to the annual monitoring results of the Environment Agency. However, it is still too early to ...