Oily leaves with tiny tan specks are likely aphids. They cluster on new growth and excrete sticky honeydew.
Use Ortho Rose Pride Insect Spray. Thoroughly cover leaf undersides and the base of the bush where aphids hide when not feeding. Organic sprays rarely provide permanent control.
Lacy Leaves on Knockout Roses: Sawfly (Rose Slug) Damage
Diagnosing Yellow Leaves on Roses: Common Causes and Solutions
Managing Aphids, Leaf Shine, and Pruning in Coastal South African Rose Gardens
Curling Leaves on Knock Out Roses: Multiple Possible Causes
Controlling Powdery Mildew on Miniature Roses
Rooting a Florist Rose Cutting – Low Success Rate
Diagnosing Blackened Rose Leaves: Spray Damage or Nutrient Issue?
Gardenia, Rose, Azalea Fall Care: Neem Oil for All Three
Sawfly vs. Rose Chafer: Saving Defoliated Knock Out Roses
Tiny Holes in New Knockout Rose Leaves: Chewing Insects
Yellow Leaves on 'Leverkusen' Climber and Winter Rose Losses
Brown, Crumbling Leaf Tips on Climbing Rose: Late Frost Damage on New Foliage
Rose Bush Full of Flowers but Bare of Leaves: Causes and Patience
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