That photo sure looks like a bad case of Scale attacking the rosebushes. I would recommend using either the product at this link: http://www.planetnatural.com/product/take-down-garden-spray/ or get some Bayer Rose and Flower Care granules and give the rosebushes some of the granules mixed into the soils ASAP. The granules are a systemic that will move through all the tissues of the rosebushes and will provide a longer lasting control.
Answered on October 5, 2014
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