They also attack living trees by consuming the heartwood which weakens the tree and can bring it down in a storm.

This is caused by foliar fungi that are secondary parasites attacking weakened trees.

What manner of sickness can attack trees as well as people?

Unlike the dwarf variety, it attacks only hardwood trees like oak and cottonwood.

Environmental factors like air pollution, drought and other fungi might also cause the disease that attacks ash trees.

The San Jose scale is a tiny grey dot that attacks trees.

When this point is reached, the beetles release a chemical to direct beetles to attack other trees.

The reason for this disease attacking older trees is due to the diseases growth from old, dying or dead seed cones.

Some species' larvae, however, will attack healthy trees or even root vegetables, and when they occur in large numbers, can cause economically significant damage.

Anthracnoses are a group of fungi that attack specific trees.