Eutypella Canker On Maple

The fungus Eutypella parasitica kills the growing layer of cells under the bark, the cambium, and causes a pronounced bulge of callus to develop around the infected area of red, sugar, silver, Norway,

Euonymus Diseases

Informational table showing disease name, symptoms, pathogen/cause, and management of Euonymus diseases.

Elm Diseases

Informational table showing disease name, symptoms, pathogen/cause, and management of Elm diseases.

Douglas-Fir Diseases

Informational table showing disease name, symptoms, pathogen/cause, and management of Douglas-Fir diseases.

Diagnosing Root Death In Woody Ornamentals

Root death is an important cause of poor plant health in woody plants. When roots are killed, the plant is not able to take up sufficient water or nutrients to support the development of branches, lea

Dogwood Diseases

Informational table showing disease name, symptoms, pathogen/cause, and management of Dogwood diseases.

Cytospora Canker on Spruce

Blue and Norway spruces are susceptible to a branch killing disease caused by the fungus Cytospora kunzei.

Crown Gall

Crown gall is caused by bacteria belonging to the genus and species Agrobacterium tumefaciens. This bacterium can infect a wide range of herbaceous and woody plants.

Crabapple Diseases

Informational table showing disease name, symptoms, pathogen/cause, and management of Crabapple diseases.

Cotoneaster Diseases

Informational table showing disease name, symptoms, pathogen/cause, and management of Cotoneaster diseases.

Chestnut Diseases

Informational table showing disease name, symptoms, pathogen/cause, and management of Chestnut diseases.

Cherry Diseases

Informational table showing disease name, symptoms, pathogen/cause, and management of Cherry diseases.

Cedar Apple And Related Rusts on Ornamentals

Cedar-apple rust and closely related diseases, cedar-quince, cedar-hawthorn, and Japanese apple rusts are caused by fungi belonging to the genus Gymnosporangium.

Catalpa Diseases

Informational table showing disease name, symptoms, pathogen/cause, and management of Catalpa diseases.

Canker Stain in Sycamore and London Plane Tree

London plane and sycamore trees are susceptible to a fungus, Ceratocystis fimbriata f. sp. platani, that is lethal. The living cells of the wood in the phloem, cambium and sapwood are invaded quickly

Cankers of Hardwood Deciduous Trees

Localized areas of dead bark and underlying wood on twigs, branches and trunks are called cankers.

Boxwood Diseases

Informational table showing disease name, symptoms, pathogen/cause, and management of Boxwood diseases.

Botryosphaeria Canker

The fungus Botryosphaeria can cause a branch dieback on horsechestnut, redbud, dogwood, beech, walnut, tulip poplar, sweetgum, crabapple, pine, oak, rhododendron, azalea, rose, willow, elm, yew, and m

Boston Ivy (Parthenocissus) Disease

Informational table showing disease name, symptoms, pathogen/cause, and management of Boston Ivy (Parthenocissus) diseases.

Black Knot Of Prunus

The fungus Plowrightia morbosa (Apiosporina) causes the formation of dark brown to black, long, swollen galls or knots on the branches of most types of cultivated plums, prunes and cherries.