Fungicides aren’t generally harmful to bees…here’s the one I’d suggest: https://www.bonide.com/products/garden-naturals/view/777/revitalize-bio-fungicide-conc
Fungicides aren’t generally harmful to bees…here’s the one I’d suggest: https://www.bonide.com/products/garden-naturals/view/777/revitalize-bio-fungicide-conc