A: The circular cutouts are made by leafcutter bees and are very common on rose bushes. The bees don't eat the cut leaf sections, but use them for nesting material. Leafcutter bees don't harm the rose bush, other than making the leaves slightly less attractive. They also aren't aggressive and are quite shy, which is why they're rarely seen, leading to the common question about what's causing the neat holes in rose leaves. If moisture is visible close to the surface, don't water, but if the rootball is dry, soak thoroughly.

Source: Daily Sun July 15, 2017 12:33 UTC