Hi,
According to the JADAM philosophy, “The good and the bad are one”.
A combination of JS diluted 1000 times and JWA diluted 100 times is usually not harmful to flowers.
But, if concentration of JWA is increased to 25x, it might have negative effects on flowers.
Or, if concentration of JS is increased to 250x, it will almost definitely make flowers drop.
It is not possible to guarantee that JS and JWA never harm pollinators because nature has so many kinds of them, but in my experience, both bees and spiders are fine.
My advice is
1. Before spraying the whole field, always test on a small area first.
2. When treating a plant disease, first figure out which combination of JS and JWA is effective against it. Then, if you are still not sure how it affects pollinators, catch a few of them in a jar, spray them and observe their behavior for the next 3 hours.
3. If you found evidence that your JS+JWA fungicide harms pollinators, consider spraying your garden when pollinators sleep.