Insect & Disease
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Dogwoods are treasured landscape trees. A destructive disease known as anthracnose can tarnish their beauty, degrade their health, or even kill the tree.

There are various species of wasps that may infest oak trees, but two common species include the horned oak gall wasp (Callirhytis cornigera) and the gouty oak gall wasp (Callirhytis quercuspunctata). These pests cause galls, or abnormal plant growths, found on foliage and twigs.

All stressed pine and spruce trees are vulnerable attack. Healthy trees are rarely attacked, although where Ips populations are extremely high, healthy trees may be overwhelmed by large numbers of beetles.