Rose Problems
Insect
Damage
Control
AphidsStunted growth and deformed flowers and shoots, sticky residue on leaves, small soft-bodied insects clustered on buds, shoots and leavesSquish with fingers; knock off with a strong spray of water; spray with insecticidal soap, horticultural oil or pesticide
Japanese BeetlesHoles in leaves between leaf veins or petals; leaves become skeltonized.Handpick and drop in soapy water; spray with an insecticide or use a systemic insecticide
Rose SlugsBrown leaves from green sawfly larvae known as rose slugs which are located on the underside of the leavesHandpick and drop into soapy water; spray with Bt spray such as Captain Jack's
Disease
Damage
Control
Black SpotBrown or black spots with fringed margins on leaves; causes leaves to turn yellow and drop prematurely Avoid wetting foliage; pick off and destroy infected leaves, and clean up dropped leaves; spray with Bonide Copper Fungicide to prevent further infection
Powdery MildewWhite or gray patches with powdery appearance on leaves, shoots, buds, and flowers; premature leaf dropAvoid wetting foliage; pick off and destroy infected leaves, and clean up dropped leaves; spray with Bonide Copper Fungicide to prevent further infection
Rose MosaicYellowish mottling or banding on leaves; stunted growthRemove and destroy severely infected plants
Rose RustReddish orange bumps on leaf undersides, with corresponding yellow spots on upper leaf surface; premature leaf dropPick off and destroy infected leaves, and clean up dropped leaves; spray with Bonide Copper Fungicide to prevent further infection