Shrub Insects

Tuliptree scale (Toumeyella liriodendri) is a native type of soft scale insect.

Degree Days (DD), also termed Growing Degree Days (GDD), measure how much warmth above a certain threshold has accumulated since the beginning of the year.

White frothy substance on tender plant stems cover spittlebugs as they suck plant juices.

There are several species of lilacs that are grown in Maryland.

A black sooty film covering the top side of shrub leaves can indicate a problem with scale insects.

Indian Wax Scale (Ceroplastes ceriferus) is a non-native type of soft scale insect and can be difficult to manage but easy to see.

Gloomy scale is a native type of armored scale insect and can be difficult to manage.

Japanese maple scale (Lopholeucaspis japonica) is a non-native type of armored scale insect that can be difficult to manage. It can infest a large number of landscape plants.

San Jose Scale (Quadraspidiotus perniciosus) is a non-native type of armored scale insect and can be difficult to manage as their waxy body covering shields them from predators and certain pesticides.

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