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. (My) birch tree, planted many years ago, has never really grown full. In the spring, it will get tiny green leaves but (it’s) still very airy and not full foliage. We’ve been told not to prune it.

Click to open image viewer. CC0 Usage Conditions ApplyClick for more information. Landscape and botanical sketch showing a view of two birch trees in the woods of Vermont during Autumn. Visible just ...

Air pollution from diesel exhaust, brake dust, and other particles thrust into the air by cars on multilane highways has measurable effects on health—increasing the risk of asthma, heart disease, and ...

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.

Well into their senescence period, birch trees' leaves have turned yellow near the Alaska Public Media studios in Anchorage as of Oct. 1, 2021. (Casey Grove/Alaska Public Media) It's green-and-gold ...

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 ...

Walking along the banks of a river, through a young forest, or along a city street, there is a tree that stands out from the rest. At first glance it might appear to be just another paper birch, but ...

Physicists at Umeå University, in collaboration with researchers in China, have developed a laser made entirely from biomaterials—birch leaves and peanut kernels. The environmentally friendly laser ...