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Dogwood (Cornus spp.)-Branch Cankers March 2023 Cause Various fungi such as Phoma, Phomopsis, and Cytospora. Neonectria ditissima (formerly Nectria galligena) is a problem on native dogwood. Usually these fungi are opportunistic and are able to attack onl ...
Dogwood (Cornus spp.)-Collar Rot March 2023 See: Dogwood (Cornus spp.)- Root Rot Cause Phytophthora cactorum, a soilborne fungus-like microorganism. This organism can survive as a resting structure (chlamydospores and oospores), as hyphae in the roots of ...
Dogwood (Cornus spp.)-Leaf Scorch March 2023 See: Maple (Acer spp.)- Leaf Scorch Dogwood (Cornus spp.)- Anthracnose Cause Leaf scorch and leaf roll result from stress. Drought, heat stress, overwatering, and construction damage are possible causes of both ...
Dogwood (Cornus spp.)-Leaf Spots March 2023 Cause Leaf spots may be caused by a wide variety of fungi including Cercospora, Elsinoe corni (cause of spot anthracnose), Phyllosticta, Ramularia, Septoria, Sphaceloma, Phlyctema vagabunda and others. Botrytis ...
Dogwood (Cornus spp.)-Powdery Mildew March 2023 Cause Erysiphe pulchra (formerly Microsphaera penicillata) and Phyllactinia guttata can produce white mycelial growth on leaves, buds, flowers, and new stems of dogwood. Powdery mildew on dogwood has been an ...
Dogwood (Cornus spp.)-Root Rot March 2023 See: Dogwood (Cornus spp.)- Collar Rot Cause Several fungi have been associated with necrotic roots of declining trees, but their importance is undetermined. Dogwoods weakened by adverse environmental conditions s ...
Dracaena-Tip Burn March 2023 See: Fluorine Toxicity in Plants Cause Both Dracaena deremensis and D. fragrans (corn plant) are very sensitive to fluoride toxicity. Although there are many natural sources or fluoride in water, many municipal water sources i ...
