Discover the major common tree diseases in the United States. Armillaria attacks both hardwoods and softwoods and causes either yellowing leaves or browning needles. Wood that is decaying from ...

Virginia Pine . A small tree that might grow to be as tall as 40 feet, Virginia pine (Pinus virginiana) is pyramid-shaped when young, and the crown flattens out with age.Other common names include ...

Fungus gnats Their larvae live in potting mix and feed off fungus which grows when potting mix is kept too wet. They aren't a huge threat to a plant's health, but they can be annoying.

A common cause of tree damage in backyards and small woodlands is from sapsuckers (Sphyrapicus spp.), which are a species of woodpecker.The Pacific Northwest has three native sapsuckers. The red ...

When autumn strips the trees of their leaves, I always get a rash of correspondence from eagle-eyed readers who have spotted odd growths and goings-on among the naked branches. Jonathan Foulkes ...