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Shrub Insects
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Updated: July 27, 2023
Borer Insects on Shrubs
If you see dead and wilted leaves on rhododendron, look at the stem below the damage for borer holes and prune out the damage.
Updated: July 14, 2023
Rose: Identify and Manage Problems
List and descriptions of common rose problems
Updated: June 21, 2023
Leafcutter Bees on Shrubs and Flowers
Leafcutter bees cut circular or c-shaped sections from leaves of plants such as redbud, serviceberry, and rose.
Updated: June 12, 2023
Azaleas and Rhododendrons: Identify and Manage Problems
List of azalea and rhododendron diseases, insect pests, and abiotic problems.
Updated: May 22, 2023
Bagworms on Trees and Shrubs
Needled evergreens are the preferred host of bagworms but don't be surprised to see the bags on the branches of shade trees.
Updated: May 9, 2023
Sawflies
Sawfly damage is done by larvae that resemble caterpillars. These insects feed in groups and can be found chewing the leaves of a variety of plants including roses, dogwoods, hibiscus, columbine, birch, and pines.
Updated: May 3, 2023
Planthoppers
Planthoppers may be found on a variety of garden plants. Most species are just a temporary nuisance and do not require control.
Updated: March 1, 2023
Tuliptree Scale
Tuliptree scale (Toumeyella liriodendri) is a native type of soft scale insect.
Updated: March 1, 2023
Understanding Degree Days
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.
Updated: February 28, 2023
Spittlebugs on Trees and Shrubs
White frothy substance on tender plant stems cover spittlebugs as they suck plant juices.
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