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ST. PAUL -- With the threat of emerald ash borer potentially killing ash trees in Minnesota, homeowners must begin planning for the future and plant a more diverse selection of tree species in their ...

This October, the over-a-century-old tree on Libe Slope located near the Sesquicentennial Memorial died and was cut down. This tree marks one of over 2,100 ash trees on Cornell grounds that will be ...

Waterloo is partnering with the Iowa DNR to replace about half of the trees that were lost to the emerald ash borer in the past decade. The city will be making one type of apple tree and three species ...

Kris Dullmer of Ash Tree Solutions, right, injects an insecticide into an ash tree named Big Jim in the Catamount Community Forest to combat the emerald ash borer in Williston on Tuesday, June 25.

The emerald ash borer, a small green beetle native to Asia, has been damaging ash trees in the Kansas City area for over a decade. Dr. James E. Zablotny, USDA U.S. Department of Agriculture A tiny ...

One of the three wasp species the state's Division of Forests and Lands uses are tied to a tree during their release so they can emerge in their own time. Earlier this summer, during a scheduled tree ...

James E. Zablotny/USDA APHIS This week, crews removed dozens of infested ash trees in Forest Grove as part of a state plan to slow the spread of the destructive pest. This month, state agencies ...

Bark beetle infestation is a leading cause of tree death in the United States, and as the climate warms, trees weakened by drought are more and more susceptible to being taken out by a growing plague ...

Research entomologist Jian Duan cuts away bark from ash trees in search of emerald ash borers, an invasive species that has been killing off the trees. They’re looking particularly for those affected ...