Category Archives: Plant Diseases

Lilac Blights

A long rainy spring, such as many of us experienced this year, creates the perfect conditions for lilac blight. There are two types of lilac blights, a fungal variety, Ascochyta syringae, and a bacterial variety, Pseudomonas syringae p.v. syringae (the … Continue reading

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Alternaria Leaf Spot Fungus on Aster ‘Purple Dome’

Regrettably, I can no longer recommend Aster (syn. Symphyotrichum) novae-angliae ‘Purple Dome’ due to its susceptibility to Alternaria leaf spot. Alternaria is a fungal leaf spot disease that can affect trees, as well as perennials. Although often not serious on … Continue reading

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A Note on Powdery Mildew and Disease Management

“Powdery Mildew on Lilacs” continues to be one of the most read articles on Gardening in the Mud. However, anyone located in Zones 5 and 6 hoping to treat powdery mildew at this time of year has only one control … Continue reading

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Plant of the Month: Asiatic Hybrid Lilies

In between early summer and high summer, among the best perennials to join June-blooming roses are the Asiatic hybrid lilies. Stately and strong, they provide a welcome linear accent in the garden. The multitude of colors and patterns makes it … Continue reading

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Plant Viruses

Roses aren’t the only plants that suffer from viruses. Here are two photos from the Wisconsin Pest Bulletin showing viruses that were found on nursery stock in Wisconsin. Both photos show examples of Tobacco Rattle Virus. The virus on the Dicentra … Continue reading

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A New Rose, Part II

Isolating a plant ailment is confusing at times, especially distinguishing between plant nutritional issues and plant viruses. Even when the cause of the problem is traceable to a mineral deficiency, it’s important to identify which mineral is deficient in order to … Continue reading

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A New Rose, Part I

A long, cool spring–such as we had this year–requires extra patience in assessing which plants didn’t survive the winter. By mid-May, it was clear my Anemone japonica were doomed. While I adore anemone foliage, I particularly love the single-petaled flowers that … Continue reading

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