Q.Small White Spots Appear On The Leaves Of My Rose. These Spots Get Bigger And Eventually Turn Into Holes Leaving Very Little Leaf.
This happened last year and I pruned the rose back quite severely but hasn’t made any difference
Hard to say with no photos of the problem. It could be a fungus called Powdery Mildew. However it does not typically cause holes in the foliage. It could also be a form of mealy bug or other insect. I would recommend placing some effected leaves in a plastic bag and take them to a local nursery. Ask for their Horticultural Specialist. Once they see it first hand they can help you control it. I would guess that it could be sawfly larvae causing the problems, thus spraying the rosebush well with some Insecticidal Soap as directed on the product label will usually gain control.