At first I thought those hundreds of rolled-up leaves on the two old birches holding the hammock were catkins, those long, thin flowers we see in the spring. Of course, that was easy to think with a ...

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 ...

Many birch leaves in Fairbanks and Anchorage are going from green to brown as the result of an insect infestation. U.S. Forest Service entomologist Stephen Burr in Fairbanks says a leaf mining bug ...

Larvae of the leaf beetle Chrysomela lapponica attack two tree species: willow and birch. To fend off predator attacks, their larvae produce toxic butyric acid esters or salicylaldehyde, whose ...

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 ...

My birch tree has developed a yellowish color to the leaves. It also has been dropping a lot of brown leaves over the last couple of weeks. Are these two problems connected? What is wrong, and what ...

Carbon dot solutions emit various luminescence under UV illumination. All carbon dots in the photograph are synthesized in Jia's research lab. Credit: Jia Wang Today, petrochemical compounds and rare ...

A renewable, low impact random laser built from birch leaves and peanuts shows a path to affordable medical diagnostics using fully sustainable materials. (Nanowerk News) Physicists at Umeå University ...

The new pressure-cooking method, developed by physicists at Umeå University, Sweden, in collaboration with researchers in Denmark and China, can break down plant biomass starting material into ...