An area on the outside of a tree trunk that appears to be stained white or looks wet during summer is likely bacterial ...

The Royal Horticultural Society explains: "Apple canker is a disease caused by a fungus, Neonectria ditissima, which attacks the bark of apples and some other trees, causing a sunken area of dead ...

However, almost all mature American elm trees have been killed in the last 50 years by Dutch elm disease, which is caused by a fungus, Ophiostoma novo-ulmi, introduced from Asia. Elm bark beetles ...

Bark stripping is a common practice among many species of tree squirrels. Squirrels don’t actually eat the bark; they strip away the top layer to get to the sweet, phloem tissue underneath. Bark ...

Minnesota Agriculture Commissioner Dave Frederickson this week moved to protect the state’s 6 million eastern black walnut trees and the state’s walnut timber producers by issuing a ...

According to the Royal Horticultural Society: "Apple canker is a disease caused by a fungus, Neonectria ditissima, which attacks the bark of apples and some other trees, causing a sunken area of ...

According to the Royal Horticultural Society: "Apple canker is a disease caused by a fungus, Neonectria ditissima, which attacks the bark of apples and some other trees, causing a sunken area of ...

It is also known as slime flux. Wetwood is a common disease affecting the central core or bark of shade trees, such as elm. The stain is caused by slime generated from fermentation pressure in ...