Something is quietly killing the Midwest’s ash trees. The culprit is small enough to fit on a fingernail, brilliant green in ...

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 ...

Safeguarding your trees against pests is important to their health and longevity. Invasive species can wreak havoc by defoliating or infecting trees, and left untreated, can lead to loss of limbs and ...

If you notice a substance that looks like ash or soot on your trees, it's likely not the result of a fire. Instead, you're ...

One type of apple insect control sprays should be applied shortly after the flower blossoms fall from the tree, according to ...

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 ...

Angela Mech, assistant professor of Entomology at University of Maine, has been leading the research for the i-Tree pest predictor. Mech specializes in invasive forest insects. University of Maine ...

HONOLULU (Island News) -- If part of your family's Black Friday is shopping for the perfect Christmas tree, we do have some questions you need to ask retailers before you buy and some tips on how to ...

It might be a good idea to dispose of this year’s Christmas tree sooner rather than later. While it’s not a regular occurrence during the holiday season, University of Wisconsin-Madison entomologist ...

GLOUCESTER Co., Va. - The Virginia Department of Forestry said it has confirmed the presence of the emerald ash borer, an invasive tree-killing insect, in Gloucester County. A release from the VDOF ...