Answer: Based on your description I am not certain which type of pest is at work. If it is a soft bodied aphid (sucking) then insecticidal soap will do the job and the soap will also work on several other common rose pests. If it is a beetle of some sort, then a product containing neem would be the thing to try. If it is a caterpillar-type pest, then use Bt. Alternatively, contact your county extension and have the pest identified for sure and ask them for their control recommendations.
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