Curling leaves with black spots = classic black spot fungus exacerbated by overhead watering.
Humidity makes black spot endemic. Resistant varieties ('Knock Out', 'Belinda's Dream', rugosas) reduce spraying long-term.
Leaf Cutter Bees on Roses: Cosmetic Damage, No Harm Done
Deformed Rose Leaves: Proliferation, Viruses, or Insects?
Identifying and Treating Rose Slug Damage on Container-Grown Knock Out Roses
Skeletonized Rose Leaves? It's Likely Rose Slugs, Not Caterpillars
Bottom-Up Leaf Loss on Roses Near Detroit
Sudden Rose Leaf Drop: Stress Causes and Recovery Assurance
Yellow Leaves with Holes: Insects, Watering, and the Two-Knuckle Test
Unknown Bush Similar to Rose of Sharon – Genetic Variation
Rose Black Spot vs. Bud Blackening: Diagnosis and Dormant Oil Strategy
Controlling Rose Sawfly (Rose Slug) Larvae with Sevin Dust
Curling Leaves on a 50-Year-Old Rose: Wet Soil, Mildew, or Ground Cover Issues
Spindly, Curly Rose Leaves in Everett, WA: Herbicide Drift Diagnosis
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