PORTSMOUTH -- Those dropping maple leaves and brown spots on the leaves of oak trees aren't caused by hungry bugs, as one would think, but rather fungi that has been attacking New Hampshire trees ...

This fungus disease can affect all oak trees, but red, black and pin oaks are most susceptible. Sometimes a secondary fungus, spot anthracnose, shows up as tiny black specks on leaves affected by ...

A fungus has caused leaf spot disease on this birch, a species highly prone to leaf spot. One is the presence of a plant that's susceptible to a particular disease. Not all plants get all diseases.

Each spring, river birch trees are visited by two common pests – aphids and the sawfly larva. While both cause river birch trees to lose some leaves, they do not pose any serious threat to the ...

As they cling to leaf tips, newborn warty birch caterpillars produce vibrations that can ward off invaders approaching their millimeter-size domain. By Becky Ferreira When territorial animals are ...

Their larva feeds on the leaves’ green tissue and causes a partial to full browning of the leaves. Birch dieback. A disease ...

Birch also sometimes suffers from fungal leaf disease that can cause leaves to drop prematurely. The leaves spot and discolor, then drop off over a period of days to weeks.

Any steps to prune birch trees for structure are best done when the tree is young. For example, if the tree has two dominant ...

A: What you have is a fungal disease on the leaves. There are a couple of fungal diseases that can cause this, and they also can infect cherry and peach tree leaves.

Brown birch trees in both Southcentral and Interior Alaska this summer aren’t signaling an early fall. Rather, they are subject to an infestation of small, leaf-munching larvae. Alaska is in the ...

Beech leaf disease will be devastating — of that there’s no doubt. But Gore is already looking beyond it. New York employs some of the finest urban foresters in the country, masters in a field ...