Shrub Insects

If you see dead and wilted leaves on rhododendron, look at the stem below the damage for borer holes and prune out the damage.

Psyllid insects produce a fluffy white waxy substance on boxwood plants. Leaves at the end of branches may appear cupped and distorted.

List and descriptions of common rose problems

Hydrangeas (Hydrangea spp.) are popular flowering shrubs in Maryland summer gardens.

Leafcutter bees cut circular or c-shaped sections from leaves of plants such as redbud, serviceberry, and rose.

List of azalea and rhododendron diseases, insect pests, and abiotic problems.

Planthoppers may be found on a variety of garden plants. Most species are just a temporary nuisance and do not require control.

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.