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Shrub Diseases
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Updated: September 18, 2023
Boxwood: Identify and Manage Common Problems
In Maryland gardens and landscapes, boxwood leafminer, Volutella blight, and winter injury are among the most common problems people experience with their boxwood plants. Use this resource to diagnose, manage, and prevent these common problems.
Updated: February 24, 2023
IPM - Prevent, Identify, and Manage Plant Problems
How to ID, prevent, and manage plant problems in Maryland using IPM
Updated: September 14, 2023
Volutella Blight Disease of Boxwood
Tips of boxwood branches turn yellow to tan. Loose bark on affected branches may indicate this fungal disease.
Updated: July 14, 2023
Rose: Identify and Manage Problems
List and descriptions of common rose problems
Updated: June 12, 2023
Azaleas and Rhododendrons: Identify and Manage Problems
List of azalea and rhododendron diseases, insect pests, and abiotic problems.
Updated: May 25, 2023
Botryosphaeria Canker of Shrubs
Scattered dying branches on rhododendron could be the common fungal botryosphaeria canker.
Updated: March 1, 2023
Petal Blight
Botrytis is a fungal disease on flowers of shrubs, bulbs, and herbaceous perennials that can spread to the stem and cause girdling and dieback.
Updated: February 27, 2023
Lilac: Identify and Manage Problems
There are several species of lilacs that are grown in Maryland.
Updated: February 22, 2023
Boxwood Blight
Boxwood blight is a devastating disease of boxwood plants.
Updated: February 22, 2023
Phytophthora Root Rot on Shrubs
Foliage on rhododendron and related shrubs appear wilted and leaves roll inward.
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