Streetlights left on all night cause leaves to become so tough that insects cannot eat them, threatening the food chain, a study has found. “We noticed that, compared with natural ecosystems, tree ...

An error has occurred. Please try again. With a Lewiston Sun Journal subscription, you can gift 5 articles each month. It looks like you do not have any active ...

Welcome to our tree column, “Ask your local arborist.” Each month, arborists from the Davey Tree Expert Company in Menlo Park discuss a tree-related topic from general care and planting tips to how ...

The persistent little bugs that have turned countless acres of Montana forestland from deep greens to dry reds and browns have begun attacking trees on Mount Helena. Patches of dead ponderosa pine now ...

Long thought to produce only one generation of tree-killing offspring annually, some populations of mountain pine beetles now produce two generations per year, CU biologist Jeffry Mitton (shown here) ...