Strange marks on Mallow

[Marb67]

Yet another plant going downhill from seed. Strange rust type parasite on leaves and stems.

[Nicos]

Are they little blisters?…. Most likely to be mallow rust. Same as you get on Hollyhocks if memory serves me right?
Have you had rust on your hollyhocks?

[Snoop Puss]

Yes, I agree with Nicos. Apparently it's very difficult to cure, even with the use of fungicides.

I have a lot of mallow that grows wild on my land. Rust holds them back but doesn't seem to kill them.

[Marb67]

Are they little blisters?…. Most likely to be mallow rust. Same as you get on Hollyhocks if memory serves me right?
Have you had rust on your hollyhocks?

Yes, my Hollyhocks eventually died. There just seems no end to the pests etc in my tiny garden