Oak trees are valuable to the Northwoods environment, recreation and wood products industries, but many are in danger.

Well over half of the human population is sensitive to poison ivy, poison oak or poison sumac. Rashes usually peak in early ...

If the grass near the base of an oak tree is dying, it likely isn't due to excess acidity from fallen leaves or acorns. Dead or yellow grass at the base of a tree is more likely a sign of root ...

Add Yahoo as a preferred source to see more of our stories on Google. Many plants are poisonous to humans and animals alike, which is why it’s important to spot them before it’s too late. As more ...

Oak leaf blister is caused by a fungus that attacks most species of oaks found in Louisiana. It can be particularly bad when the weather is cool and wet. (LSU AgCenter photo) Oak leaf blister, a ...

Q: The drought has caused our very large oak trees to shed a ton of leaves, how should we handle this? Rake them up or just shred with the mower? There's very little grass under the oaks as it is, ...

This oak tree has a fungal infection of the foliage called oak leaf blister. The rainy spring created conditions ideal for this disease to attack. Because oak leaf blister is not an issue every year, ...

In late April, across the oak forests of northern Bavaria, millions of spongy moth caterpillars hatch from egg masses glued ...

Purdue Landscape Report: Each spring the PPDL receives several samples of oak trees showing curled, twisted, stunted and/or generally ratty looking leaves. When there are holes in the leaves or leaf ...