Oak wilt weakens white oak trees and kills red oaks within weeks of infection. Bacterial leaf scorch is a chronic disease that worsens over several years. Both diseases spread to nearby oaks.

White Oak bonsai trees are popular among bonsai enthusiasts due to their beautiful foliage, rugged bark, and impressive size. However, growing a White Oak bonsai tree requires patience and careful ...

Want to know what's ailing nearby trees? This index of common tree diseases and pathogens can help you identify and prevent further decay.

A deadly new oak-tree disease can be prevented by pruning them in the dormant season (if needed) instead of spring or summer.

The fungus can be carried by beetles during the spring and summer, so don’t prune trees from April 15-July 15 to protect them from disease.

What is oak wilt? Oak wilt is one of the deadliest tree diseases in the U.S., responsible for killing millions of trees across 76 counties in Texas, according to the forest service.

Iowa Department of Natural Resources forest health technician Mark Runkel (right) and GIS specialist John Mullen (left) look for trees last Monday exhibiting signs of the oak wilt fungus at ...

An invasive insect from Europe and the Middle East is attacking several Oregon white oak trees in the Wilsonville area, and state researchers say it's been found in other pest traps in the past ...

Oak wilt is a fungal disease that can weaken white oaks and kill red oak trees within just a few weeks. The fungus enters the tree through wounds that are often caused by pruning or storms.

Symptoms tend to be more variable in white oaks, but leaf discoloration is still common, though often slower to progress. How to prune your oak trees (and avoid oak wilt) ...