Brown clusters on geranium leaves

Hi guys, My geraniums have small brown spots on the underside.
Can' see if they are very small insects or disease but some of it drops off and makes a mess. Have picked off all the affected leaves just in case.
Any ideas what this is please? Paul

 

Probably geranium Rust Paul, picking off leaves may not stop it, disposal of infected plants is the best way of stopping it spreading.:(

 

Yes, I agree with strongy, but make sure that you get rid of it all OUT of the garden, don't put it on your compost heap.

We've had this problem twice. You must get rid of every leaf that shows this, check every day.

 

Thanks guys, that looks like it all right, oh dear and I thought geraniums were fireproof. Out they go then and it's plan B.

Thanks again, Paul

 

I have just found this old pic I put up on here sometime back, this was a bad infection off some Geraniums at work, naturally they were disposed off as rust could have spread through the entire stock.