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 ...

Scientists used a natural pine scent called pinene to chemically mimic food, easily overriding the natural avoidance ...

These pests can wreak havoc on stone fruit trees if they're not caught early enough.

The hemlock woolly adelgid can kill a healthy hemlock tree in 10 years and has no natural predators. The areas announced are new infestations. The hemlock woolly adelgid is an invasive insect that can ...

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 ...

Finally, the major damage to the leaves on your lemon tree appears to be the result of grasshoppers or katydids. These ...

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 ...

There’s nothing like the pine scent of a fresh-cut Christmas tree during the holiday season. The aroma and beauty of the outdoors are welcome in homes, but a freshly cut Christmas tree may harbor ...

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 ...

Box tree moths, an invasive species of insects that can defoliate and kill boxwood shrubs, have been detected in Michigan.