Mystery Tan Beetles in Rose Buds: Not Japanese Beetles—ID and Control

Barb in Vermont: Tan flying beetles, thinner than Japanese beetles, always in pairs (mating), chew into buds, kill blooms. Hand-picks daily. Asks for ID and spray.

Likely Culprit: Rose Chafer (Macrodactylus subspinosus)

Tan, slender, ½", mating pairs, skeletonize leaves, destroy buds. Peak June–July. Sandy soils favor them.

Control Options

• Physical: Hand-pick (already doing), shake into soapy water.
• Barrier: Fine netting (row cover) during 3–4 week flight period.
• Sprays: Carbaryl (Sevin), pyrethroids (permethrin), or neem oil. Apply at dusk (bees safe). Rotate chemistries.
• Soil: Beneficial nematodes (Heterorhabditis) target larvae in sandy soil.

Key: Confirm ID

Take specimen to county extension or nursery. "Tan beetle in pairs" = classic rose chafer. Ortho/Bayer rose sprays usually cover them.