Category Archive: Blog


Shipping containers: Importing insect pests, too

By Faith Campbell, Emeritus environmental advocate and tree-pest expert Several of the most damaging tree-killing insects came to America as larvae riding in crates, pallets, or other forms of wood packaging material (WPM). These include the Asian longhorned beetle (ALB), emerald ash borer, and redbay ambrosia beetle. All entered the country since trade opened with […]

Forest Digest — Week of September 15

The impacts of climate change are being felt in forests across the world. Read about new climate-change-related studies and other forestry news in this week’s Forest Digest: “Climate Change Is Making Trees Grow Rapidly” — Discovery News Scientists from Germany’s Technische Universität München have found that the two dominant European tree species — European beech […]

Tree-killing pests: Who? Where? How?

By Faith Campbell, Emeritus environmental advocate and tree-pest expert Nearly 500 non-native insects and disease-causing pathogens have been introduced to the United States in the 400 years since European settlement began. Here are some examples: Chestnut blight has virtually eliminated mature American chestnuts across the species’ range, which is most of the eastern deciduous forest. […]

Forest Digest — Week of September 8

Another week and another Forest Digest. See what’s happening in the world of trees: “Climate change accelerating death of Western forests” — USA Today A study by the Union of Concerned Scientists and the Rocky Mountain Climate Organization shows that drought, insect pests and wildfire — forest threats exacerbated by climate change — are killing […]

Forest Digest — Week of September 1

Another week and another Forest Digest. See what’s happening in the world of trees: “New Analysis Finds Over 100 Million Hectares of Intact Forest Area Degraded Since 2000” — World Resources Institute More than 104 million hectares — an area three times the size of Germany — of the world’s largest remaining forests experienced rapid […]

How large does the blue spruce grow?

By Robert T. Leverett, Native Tree Society How tall do blue spruces grow? Ornamental yard trees often reach 60 to 80 feet and 1.5 to three feet in diameter. Ostensibly reliable internet sources vary greatly on listed maximum heights. Some say more than 100 feet. Others cap the species off at 80, while one source […]

Introducing tree-pest expert Faith Campbell

Homepage photo credit: Kyle Ramirez Faith Campbell knows a thing or two about trees and the insects that threaten them. She brings years of experience, including her most recent post at The Nature Conservancy, to Loose Leaf as one of our new guest bloggers. Before diving into the interesting and sometimes volatile relationship between trees, […]

Forest Digest — Week of August 25

Summer is winding down, but our Forest Digest is still going strong. Check out this week’s news in trees: “Brazil Could Save Its Atlantic Forests for Just $200 Million a Year” — Newsweek Less than 15 percent of the original Atlantic Forest, which surrounds some of Brazil’s largest cities, remains. But scientists have calculated that […]

Forest Digest — Week of August 18

It’s Friday and Forest Digest is back! Check out this week’s news in trees: “New analysis links tree height to climate” — University of Wisconsin-Madison A botany professor at the University of Wisconsin-Madison studied how tree height, resource allocation and physiology vary with climate in Australia’s Victoria state. “Some trees face ‘extinction’ threat” — CBS […]

A presidential plea

Last week, American Forests launched its first-ever petition through TakePart’s Take Action forum — a letter to President Obama to make forests play an important role in the country’s climate change plan — and have seen a tremendous amount of people from across the world sign on. President Obama announced the initiative in July, highlighting […]