The pinkish-red spots on your birch’s leaves appear to be erineum patches, which are a type of gall caused by very tiny eriophyid mites feeding on the leaf tissue. You will need a microscope to see ...

Q: Can you help me figure out what’s likely going on with this river birch tree? The tree has been dropping leaves incessantly since about April/May, hundreds per day. Should this tree be dropping its ...

Brown birch trees in both Southcentral and Interior Alaska this summer aren’t signaling an early fall. Rather, they are subject to an infestation of small, leaf-munching larvae. Alaska is in the midst ...

Birch trees are adored for their light foliage and peeling bark. While most people think of the white bark varieties, there are birch trees with gorgeous bark in shades of orange, red, or yellow, too.

It’s the time of year when yellownecked caterpillars will soon engulf unprotected river birch trees. These pests also feed on blueberry, hickory, maple and oaks, but I have only seen them on river ...

Fall is here and all of those end-of-season projects are looming. If you’ve got questions, turn to Ask an Expert, an online question-and-answer tool from Oregon State University’s Extension Service.

Click to open image viewer. Landscape and botanical sketch showing a view of two birch trees in the woods of Vermont during Autumn. Visible just beyond a bush's red and yellow leaves at lower right, ...

I suspect that if Lake States residents were polled about their favorite trees, paper birch would fall among the top five.

It started with a tiny Scots pine growing out of a huge old birch, but soon I find more examples of this strange magic ...