Spraying programmes

I promised myself - and the roses - that I would start spraying for BS and PM early this year. That depends on the weather of course, and I've been waiting for a still, dry day. Today's forecast was for wind and showers so I thought, ah well, it will be at least a week before I can do it. But the wind died down early this afternoon, and the sky was blue and innocent looking. So out came the pressure spray and enough Triforine left from last time for 1 tank full. It went round all the roses, I was delighted.
An hour later DOWN came the rain!

Oh! Val, It always seems to happen that way, doesn't it

It's all part of life's rich pattern Carole - in the rose beds anyway! LOL

A year or two ago I sprayed some weeds with Roundup and the rain came down half an hour later. I was very pleased a few weeks later when every weed turned yellow and died.
So I deduce that the instructions on the label have a wide margin for error.
It would be interesting O40 to see if your roses respond to the very brief application of fungicide that you gave them.

Yes, I agree Dee, I'm not sure if I'll know though! I guess if the BS appears in the next week or two then it didn't work.