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destroyed. Convallaria (stem rot). Burn affected plants.Coreopsis (mildew). Delphinium (black spot on leaves). Remove and burn.Ferns (tip blight). Hollyhock (leaf spot). If attacked by rust or anthracnose destroy the plants.Iberis (club root). Use lime in soil. , Papaver (mildew). Peony (stem rot, leaf spot, botyrides).Phlox (leaf spot and powdery mildew, and stem canker).Sedum (leaf spot).Thalictrum (red spot).Veronica (leaf disease), (leaf spot).Violets (leaf spot and leaf blight). Root rot of violets and nematodes on the roots require soil treatmentand sterilization. |
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