Mystery Larvae on Rose Bush: Likely Harlequin Bug Eggs

A gardener found black-and-white eggs/larvae on a rose bush and asked for ID.

Likely Harlequin Bug (Murgantia histrionica)

Adults are black with red/orange markings. Eggs are black and white banded, laid in rows. Nymphs hatch black/white, mature to adult colors.

ID Challenge

Millions of insect species exist. Without an entomologist, exact ID from photo is guesswork. But harlequin bug eggs match the description.

Action

• Harlequin bugs feed on brassicas (cabbage family), not roses primarily.
• If on roses, they're likely passing through.
• Hand-pick or spray with insecticidal soap if numbers grow.

Monitor. Most "mystery larvae" are harmless transient visitors.