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Rose Pests and Diseases

Humans aren't alone in their appreciation of beautiful roses.  Roses are also favorites of a wide variety of insects, fungi, bacteria, and viruses.The links below provide access to profiles of the most common pests and diseases that plague rose growers in the Johnson County, Kansas area.  Each profile includes information about the pest or disease, symptoms that help you identify different insects and diseases, and control advice.

Insects

Insects that chew and suck can be especially harmful to roses. Not only do they disfigure and weaken the plant, they can also spread disease pathogens. Fortunately, most chewing and sucking insects can be controlled by applying a systemic insecticide. Systemic insecticides are absorbed by the plant and, simply put, make the rose taste bad. Quite often, you'll find systemic insecticides combined with fertilizer. This combined product is usually applied once a month.

Click the links below to see specific information on some of the more common rose insect pests.

Aphids
Thrips
Cane Borers
Spider Mites
Leaf Cutter Bees

Diseases

Sanitation is the best method of reducing problems that can arise once roses are established. Always remove prunings, leaf litter and faded flowers; use clean mulch; keep beds free of weeds; and, of utmost importance, use clean pruning equipment to reduce transmission of diseases.[1]

Fungi

Black Spot
Powdery Mildew
Stem Cankers

Viruses
Bacteria
Other

Rose Rosette Disease

Useful Links

The following link addresses a variety of rose related pests and diseases:  sactorose.org/rosebug


[1] From Kansas State publication MF-799 available at KSU Website.

updated 8/15/2010