Published on University of Maryland Extension (https://extension.umd.edu)

Home > Topics > Plants > Trees/Shrubs > Problems > Tree Diseases

Tree Diseases

bacterial leaf scorch oak
Bacterial Leaf Scorch
[1]

black knot on cherry twig
Black knot
[2]

brown rot on Kwansan
Brown Rot - cherry
[3]

canker rose
Cankers-Trees
and Shrubs
[4]

anthracnose dogwood
Dogwood Anthracnose 
[5]

dutch elm diseaseDutch Elm Disease [6]

small dark leaf spots on dogwood
Elsinoë Leaf spot (Dogwood)
[7]

fire blight
Fire Blight
[8]

green lichens on tree trunk
Lichens
[9] 

needle cast diseases on evergreens
Needle cast diseases
[10]

powdery mildew on lilac
Powdery mildew
[11]

root rot
Root rot of trees & shrubs
[12] 
cedar apple rust on apple leaf
Rust diseases
[13]

apple scab
Scab on apple
[14]

seridium canker
Seiridium and Botryosphaeria canker
of Leylands
[15]

sycamore anthracnose
Shade tree anthracnose
[16]

small holes in cherry leaves
Shot hole- cherry
[17]

young tree infected with verticillium wilt disease
Verticillium wilt
[18]

yellow streaked leavesViruses [19]

infected branchWilt Diseases [20]

witches' broom on side of tree
Witches' Broom
[21]
wood rot stem
Wood rots and decay
[22]
Section: 
Home and Garden Information Center [23]
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Source URL: https://extension.umd.edu/hgic/topics/tree-diseases

Links
[1] https://extension.umd.edu/node/8823
[2] https://extension.umd.edu/node/8827
[3] https://extension.umd.edu/node/8854
[4] https://extension.umd.edu/node/8855
[5] https://extension.umd.edu/node/8857
[6] https://extension.umd.edu/node/8858
[7] https://extension.umd.edu/node/7656
[8] https://extension.umd.edu/node/8859
[9] https://extension.umd.edu/node/8740
[10] https://extension.umd.edu/node/8860
[11] https://extension.umd.edu/node/8862
[12] https://extension.umd.edu/node/8863
[13] https://extension.umd.edu/node/8866
[14] https://extension.umd.edu/node/8990
[15] https://extension.umd.edu/node/12762
[16] https://extension.umd.edu/node/8992
[17] https://extension.umd.edu/node/11314
[18] https://extension.umd.edu/node/9040
[19] https://extension.umd.edu/node/7658
[20] https://extension.umd.edu/node/7661
[21] https://extension.umd.edu/node/7534
[22] https://extension.umd.edu/node/8807
[23] https://extension.umd.edu/sections/home-and-garden-information-center