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spraying for blackspot

5 days ago
last modified: 5 days ago

I began spraying with baking soda and New Dawn early in the season but soon after flowering half of my roses are still totally defoliated. In desperation I bought a copper spray. How do those of you who spray do it economically? It feels like such a waste to be spraying bare stems!

By the way, most of my roses were supposed to be disease resistant - Plum Perfect and Quick Silver?

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