Hi Judy, I think the problem is with the adaxial leaf surface accepting the spray and others here will probably be able to confirm this. Personally I would add more surfactant to the spray, washing up liquid will do; I'd ensure that the spray formed a fine mist to prevent droplets forming and running off the leaf and I would spray on a cloudy day to lessen any risk of evaporation of the spray. I'd also spray pre. flowering at the leaf rosette stage as the plants will be in active growth and spraying early will avoid further spread if you have the bulbil producing form Ranunculus ficaria ssp. bulbilifer. Hope this helps. Best Wishes, Dave David Fenwick Nanpean, Nr. St. Austell, Cornwall. Garden Consultant, Website Designer and Wildlife Photographer http://www.davefenwick.com/ APHOTO WILDLIFE IMAGE LIBRARIES http://www.a-p-h-o-t-o.com/ The African Garden http://www.theafricangarden.com/