Want to know what's ailing nearby trees? This index of common tree diseases and pathogens can help you identify and prevent further decay.

Trees acting in self-defense against ravenous caterpillars are inadvertently harming native moths, research shows.

For decades, the American elm population has dwindled, and one of its greatest threats is the deadly Dutch elm disease, which has taken its toll on Brown’s campus, too. The tree removal ...

A developer from Scottsdale bought some of the most lucrative land in Ace Lane’s Tree Farm project in the midvalley and was enthusiastic to build luxury condos and restaurant space. A legal ...

But, for the record, it's a pretty nice tree to look at in the fall, with its leaves turning into the color maroon. Why are they banned?: Bradford pears are banned in Ohio. Learn why, what they ...

“The leaves on a couple of my trees are starting to turn brown around the edges. Should I be concerned?” — R.W. The problem you are describing is likely an environmental condition called ...

Science What Conservation Coalitions Have Learned from an Aspen Tree A “rag-tag” group of stakeholders garnered protections this year for a vast aspen grove on Colorado’s Kebler Pass.

To leave your mark, “it may sound cool,” says Dan West, an aspen expert with the Colorado State Forest Service. “But that tree might not survive because of what you’re doing.” ...

Trees acting in self-defense against ravenous caterpillars are inadvertently harming native moths, research shows.