Sawfly wasp larvae, rose slugs, rose chafers, weevils, leafcutter bees are examples of pests that can make holes in rose leaves. You have to catch them in the act to identify them and then take appropriate counter measures. But sadly, some of them take a nibble and then leave so I sometimes learn to live with some imperfections in a small number of leaves. Controlling pest outbreaks may require inspecting the plant several times during the day and night. Look under the leaves, in the canes/branches, in the soil and under rocks. Small hail, wind and thorns can also be responsible for some leaf damage.
Answered on June 29, 2021
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