Any suggestions please!

I wondered if anyone can suggest a fungicide spray I could use on my tomatillos in the greenhouse, I have a problem with what I think is maybe a disease. I don't like using stuff like that but Im desperate. I've had a close look and I can't see any bugs but I did spray with a bug spray at the begining and it doesn't seem to have made any difference.Nothing else is affected.
Thanks
Carol.

 

I haven't tried it but Baking soda is recommeded in some places as a greenhouse fungicide. The baking soda recipe is 1 tablespoon baking soda in 1gallon of water, used as a spray. You could also try adding some Tea Tree oil to this as it is also recommended.
They are both cheap ingredients which will not harm anyone or thing [apart from, hopefully, the fungus infection!]
What do the affected plants look like? I had a problem earlier with tomatoes and tomatillos that looked like red spider mite. The leaves developed a fine mottled surface, but the plants have now recovered without treatment and I think it was very hot weather that did it, because as with yours nothing else was affected.

 

Thanks for the reply Liz, I will give your suggestion a go.
They start off like tiny blisters on the underside of the leaves then develope into holes and then shrivel up. I had this problem last year but nothing to this scale. I have tried just taking the leaves off, spraying them with a bug buster spray, I've even chopped one plant in half but its still there. I dont want it to spread but so far its just the Tomatillos it likes.