There are more than 500 types of oak trees, all of which began life as a tiny acorn. The species are divided into two general categories: white oak vs. red oak. Red Oaks vs. White Oaks ...

Oak wilt is an invasive vascular disease caused by a fungus which disrupts the movement of water and nutrients through oak trees. The leaves of infected oaks can start to wilt and drop prematurely, ...

York Region is encouraging residents to help prevent the spread of two invasive species attacking trees: the spotted lanternfly, and oak wilt fungus ...

The other gall I found, which was on a different tree, was an oak leaf pocket gall. This gall is produced by a one-eight-inch-long fly, or midge, called Macrodiplesis quercusoroca.

All the different types of oak trees means there are options for just about any yard and growing condition. “Oaks are so diverse, with nearly 500 species of all shapes and sizes,” says author ...

Oak Wilt is a disease that impacts all species of Oak trees. It especially affects the Red Oak group, which includes Red, Pin and Black Oaks. It is caused by a non-native fungus called Bretziella ...

When there are holes in the leaves or leaf edges are missing tissue, we add another symptom name to the mix: tatters. Distorted new growth and tatters are most common on white oaks and may ...

Our local forests have far fewer oak trees than were present in the 1800s and yet, of all our native trees, the oak tree is ...