Roses being eaten by what and how to control?
The holes on the leaves are caused by rose slug sawfly larvae. 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.
Horticultural oils and spinosad have low impact to people and beneficial insects. See our website for more information