https://extension.uga.edu/publications/detail.html?number=B1286&title=Key%20to%20Diseases%20of%20Oaks%20in%20the%20Landscape

The following key will help you identify common diseases of oak trees. ... Upper or lower surfaces of leaf with white, powdery growth; pale green spots may also ...

https://www.fs.usda.gov/naspf/sites/default/files/publications/9190_fh_howtorecoakdis_508.pdf

more common on white oak. Causal Agent. Fungus: Apiognomonia quercina. ( asexual stage: Discula spp.) Symptoms. Leaf symptoms: Individual and localized  ...

https://extension.psu.edu/oak-diseases

Jul 31, 2016 ... A white fan of fungal growth is often found just under the bark at the base of ... Oak leaf blister, Spots ¼ to ½ inch in diameter turn light green as ...

http://www.missouribotanicalgarden.org/Portals/0/Gardening/Gardening%20Help/Visual%20Guides/Oak%20Problems.pdf

oak, Shumard oak, water oak, and willow oak. White oak group (bottom image): Leaves have rounded lobes. (when present) and lack a bristle at the tips of both ...

https://hgic.clemson.edu/factsheet/oak-diseases-insect-pests/

Jan 24, 2019 ... Meg Williamson, Plant and Pest Diagnostic Clinic, Clemson University. Hypoxylon canker: This is a white-rot fungal disease primarily of oaks, ...

https://plantdiseasehandbook.tamu.edu/landscaping/trees/oak/

Occurs on species in both the red oak and white oak groups. The fungus causes leaf cells to divide abnormally and enlarge. If you flip the leaf over you will ...

https://www.extension.iastate.edu/news/2006/jul/070301.htm

Careful observers have noticed that some of the leaves on white oak trees appear more ... Anthracnose is a fancy term for a leaf spot or leaf blight disease.

https://go.illinois.edu/ExtensionOakReport

University of Illinois Plant Clinic • S-417 Turner Hall • 1102 S. Goodwin • Urbana, IL 61801 .... White oak, while others prefer well-drained soils and can tolerate.

http://ceventura.ucanr.edu/newsletters/Vol_19,No4_-_December_200629825.pdf

Dec 14, 2006 ... When oak root fungus kills the tree rapidly, this can result in .... A thick white mycelial plaque (left below) is easily found in the advanced stages ...

https://palopinto.agrilife.org/files/2015/07/Oak-Tree-Diseases-and-Their-Control.pdf

In the case of other oaks, powdery mildew may cover the entire leaf surface giving the appearance of a fine white to gray powder. The fungus overwinters on  ...