Care of NoKnock Rosebushes
Sounds like rose slug damage. This is a common problem of knockout roses.
The holes on the leaves are caused by rose slug sawfly larvae. There are several types and may be active through the fall. Look on the undersides of the leaves for the young larvae. If the infestation is light, pick off and destroy the larvae by hand. To control heavy infestations, use horticultural oil or spray with spinosad. Target the undersides of the leaves. See our website for more information