Green Caterpillars Eating Knock Out Rose Leaves Near Chicago

Managing Rose Leaf Caterpillars

Double Knock Outs near Chicago have 1/2-inch green caterpillars on leaf undersides, eating holes. Spraying 3x helps. Most damage at base.

Caterpillars drop to soil after feeding, pupate, re-emerge. Spraying must include soil around base to break cycle.

Rose will push new leaves in 2 weeks. Continue monitoring and spraying as needed.

Roses: Reviving Struggling Knock Out Roses After Transplant; Pruning Double Knock Out Roses in a Mild Winter: Staged Approach; Red Leaves on New Double Knock Out Roses: Normal or Problem?; Restoring Bloom Size on Double Knock Out Roses: Pruning Frequency and Fertilization Schedule; Deadheading Knockout Roses: Snap, Don't Snip—And It's Optional; Troubleshooting Dying Stems on Newly Planted Double Knock Out Roses; Overhead Watering for Knock Out Roses: Why It's Acceptable and How to Do It Right; Planting Double Knock Out Roses in Atlanta: Frost Tolerance and Establishment; Double Knockout Roses Reacting Badly to Systemic Spray? Try a Chemical Break; New Knockout Roses: Purple Leaves and No Blooms – Transplant Sulk

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