Diagnose: Boxwood Root Rot

1. Dark reduced feeder roots plus brown crown tissue in a wet-site pattern
2. Expose roots at the edge of the decline and compare them with roots from a nearby vigorous section. Firm, branching fine roots argue against advanced root rot; sparse dark roots that break easily, combined with brown tissue under the bark at the crown and a history of saturation, support a root or crown disease. A diagnostic lab can determine whether Phytophthora is present.

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