What is wrong with my geraniums?
By Bernieh
Queensland, Australia,
Australia 
It starts off as a white translucent patch and then these patches disintegrate into holes. This has happened on every geranium. I can't find any little creature on the plant but I've been spraying with a pyrethrum based spray anyway, but nothing much has changed. Any idea?
24 Jun, 2009
Answers
Thanks Bamboo - will try a fungicide.
24 Jun, 2009
It looks a bit like shot-hole to me, Bernie, but I've only ever seen that on Antirrhinums. The cure in that case is to spray with any product containing zineb.
24 Jun, 2009
I think perhaps you need to try a less environmentally friendly treatment - find a combined systemic pesticide/fungicide (if you lived in England, I'd recommend Roseclear 3) and spray the undersides and topsides of the leaves. Not sure what that is on the leaves, but clearly something's going on and the pyrethrum's not cutting the mustard.
24 Jun, 2009