Botrytis

Anyone know the best thing for this pesky disease? I have got it on a batch of pot primroses. It developed while I was away for a few weeks and had to put them under automatic watering. I have cleaned up the plants, sprayed and spaced out the pots, also getting a throughput of air through the poyltunnel. They are the variety Danova and so are coming into flower . I am planning to sell them at the Country Market stall soon. Polyanthus plants that also had a bit have shrugged it off completely.

 

There's a garlic spray which works quite well - used by professionals on cucumbers etc but can't think of the name at the moment. You could probably find it on t'internet