Tree Insects

Learn about the biology and behavior of cicadas, what to expect during a periodical cicada mass emergence, and how to protect young trees from egg-laying damage.

Eyespot leaf galls, named for their bullseye-like pattern on the leaf, are caused by the larvae of certain midges (small flies).

Learn about how scale insects are classified and how they feed, and how to effectively manage populations that cause plant damage.

Learn how to inspect plants for signs of a scale insect infestation.

Learn how to identify and manage several species of armored scale insects.

Caterpillars of the non-native spongy moth are a serious pest of oak trees in Maryland, and in outbreak years, can cause significant defoliation.

Honeydew, a sugary waste product is produced by many sap-sucking insects. Sooty mold is a fungus that grows on the honeydew.

A variety of mites occur in home gardens. Learn about their life cycle and how to identify and manage pest mite species.