Yes, the adults can cause minor damage to rose petals. Choose a pesticide that has a low impact on natural enemies, such as lady beetles and pollinators. Neem is a plant based pesticide that prevents insects from feeding, which eventually kills them. Pyrethrins have no residual and treatments need to come in contact with the beetles to be effective. Finally, there are broad-spectrum pesticides (permethrin, bifenthrin, lambda-cyhalothrin and carbaryl) but we don’t use them since they kill beneficial insects, too.
Yes, the adults can cause minor damage to rose petals. Choose a pesticide that has a low impact on natural enemies, such as lady beetles and pollinators. Neem is a plant based pesticide that prevents insects from feeding, which eventually kills them. Pyrethrins have no residual and treatments need to come in contact with the beetles to be effective. Finally, there are broad-spectrum pesticides (permethrin, bifenthrin, lambda-cyhalothrin and carbaryl) but we don’t use them since they kill beneficial insects, too.