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Brown vs. White Mold on Roses: Identification Needed for Treatment

Two Different Molds, Two Different Cures

Louisiana gardener: rose bushes have brown mold spots, weekly/biweekly treatment failing, lower half leafless. Asks if should cut back hard, pluck leaves, continue treatment.

Expert Needs Color ID

Grey mold (Botrytis): Easy. 2 tbsp baking soda in 4 qts water, spray daily until gone.
White mold (Powdery mildew/Sclerotinia): Requires different approach.

Reply with: what color is the mold when it FIRST appears? Then correct treatment can be prescribed.

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