Knockout Rose Brown Leaves and Holes: Seasonal or Pests?

October in Growing Zone

Knockout leaves turning brown with holes. No insects seen. Treated for insects.

Possibilities

• Seasonal confusion: Roses unsure whether to grow or harden off in fall.
• Whole plant brown? Check for moles/voles damaging roots.
• Holes in leaf centers: Slugs.
• Holes on edges: Grasshoppers (abundant in fall, hard to control).

Identify hole pattern. Slugs = centers; grasshoppers = edges. Moles/voles = whole plant decline.