Rose bush under attack – Sawfly


I received a response yesterday suggesting I send a photo. I had done so but perhaps it was not clear enough. I am sending another photo of individual leaves from my rose bush.
I looked at the underside very closely and can see nothing that is eating these leaves.

Two of the leaves in the attached photo are that of the underside.


Hello again, I now can see clearly that your problem (on the rose anyway) is not leaf-miner but is in fact Sawfly other wise known as rose slug.  It is actually not a slug but the larva of the sawfly, and because of its pale green colour is extremely hard to see on your leaves.  This is a common question for us at this time of year and here is an answer to one of those previously asked enquiries:

The Sawfly (common rose slug) causes skeletonizing or window pane like damage to rose leaves in spring and early summer. The larvae look like caterpillars but are actually more closely related to bees and wasps. Common rose slugs are green with a light tan head and often have may hairlike bristles. Control can include hand picking and the use of horticultural oils or insecticidal soaps. (more information here)