Oak trees around Minnesota have suffered from bouts of heavy precipitation and drought — conditions that make them more vulnerable to two-lined chestnut borer, a beetle that eats the inner bark ...

Of the thousands of native plants and trees that most Americans and nearly all Minnesotans can plant in their yards, one species towers above the rest. To do the most good for the most things, and ...

Oak savannas — open grassland studded by tall, spreading oak trees — once covered 10 percent of Minnesota, mostly in the southeast quarter of the state.

MINNEAPOLIS — The record warmth this winter could continue to cause problems through the spring and summer for oak trees. Oak wilt, which has been in Minnesota for 70 years now, continues to spread.

For her part, Hagerty says she’s been able to treat and protect 18 of Racek’s oak trees from the borers. She notes if they’re discovered soon enough, a tree can be saved.

Oak trees make up a third of deciduous forests in the U.S. and are one of the most important tree lineages, said Gerard Sapes, a University researcher on the project. Not only do oaks store and filter ...

Oak trees are producing a bumper crop in Minnesota. "There are lots of animals that eat acorns," she said. If a tree produced the same number of acorns every year, the animal population would grow ...

About one week’s growth of oak wilt fungus surrounds each small sample of red oak in a petri dish at the University of Minnesota’s Plant Disease Clinic in St. Paul in 2014. JEFF WHEELER ...

Oak trees' acorn production down across Minnesota As deer, ... John Korzeniowski, the Minnesota Department of Natural Resources’ Little Falls-based area forestry supervisor, ...

About a quarter of the 1.4 million trees the group planted in Minnesota this year were “climate-adapted,” says Laura Slavsky, a resilience forester for the conservation group who was ...

DULUTH, Minn. — Red oak trees are not particularly common in northeastern Minnesota. But on the University of Minnesota Duluth's research plot, 850 1-year-old trees have taken root. "They're ...