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 ...

New research out of the University of Vermont finds that insects and disease are growing causes of tree mortality in the ...

Q: I have a pine tree that is oozing a waxy substance. There is so much of it that the rocks beneath the tree are shiny. I also noticed that the branches are covered with little black bugs. They look ...

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 ...

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 ...

Hemlock woolly adelgid is closing in on a private Adirondack forest where researchers are racing to protect the trees.

More than 271 million ash trees in Tennessee are at risk of being destroyed by emerald ash borers, an insect that arrived in Middle Tennessee in 2014, according to Nashville's Cheekwood Estate and ...

Every spring and fall in Utah, clusters of Boxelder bugs start appearing on walls, crawling along window frames, and sneaking ...

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 ...