It was first This ugly fungus looks like poop on a stick. The prettiest trees in your yard might be infected with one of the ugliest diseases. This colorful tree produces an oval canopy of light green foliage that changes to showy hues of purple and red in the fall. It is a very important commercial fruit tree. Jen on August 12, 2014:. Chokecherry trained as a shrub (right). Anthropologists indicate cherries have been harvested in Eurasia from 4,000 to 5,000 B.C. ½ inch light green caterpillars. In 1629, chokecherry was imported to England where it has been cultivated as an ornamental. Susceptible to many insect and disease problems. Is it safe to eat the plums if the tree has black knot. Black knot fungus shows up in ornamental mayday trees and Schubert chokecherries as a kind of botanical character foil to the fragrant white flowers of the former and the royal purple leaves of the latter. Chokecherry is primarily used today as a food product that makes fine preserves, juice, jelly, and syrup. Protect the trunk especially where maintenance activities, such as mowing, may cause damage. Sorry for the crudity, but it really is the best description! Black knot is a fungus that can affect Mayday and Cherry trees. Slender twigs form a oval to rounded crown. Like all choke cherries, the Schubert is prone to a disease called black knot fungus. The Canada red chokecherry, a member of the rose family, is susceptible to several diseases, some of which can cause permanent injury. Native throughout most of the United States but difficult to find in the nursery trade. Corky, black, spindle-shaped swellings found on the branches and twigs are the major symptoms of this disease. I have just cut off all the infected branches on my chokecherry trees and found orange speckles on some . Wendy on May 01, 2014:. Canada Red Chokecherry Prunus virginiana 'Schubert' Plant Details: Plant Type ... Monitor the tree for pests, diseases or other ailments on a regular basis. Destroy tents on cool days with larva inside. Clusters of drooping white flowers are followed by dark purple fruit. ‘Schubert’ Chokecherry – Prunus virginiana ‘Schubert’ The chokecherries are planted for their beautiful spring flowers and in the case of ‘Schubert’, their contrasting purple foliage. ‘Schubert’ choke cherry, with its vivid foliage and pyramidal form, makes a fine focal point. ‘Canada Red’ chokecherry, trained as a tree (left). (Don’t plant it near patios or walks, as they’ll quickly be covered by bird droppings.) Black Knot of Mayday and Schubert Chokecherry - The City of Red Deer Problems Pests and Diseases: Pest /Disease Identification Control Prairie Tent Caterpillar, Eastern Tent Caterpillar Mass of webbing on branches. 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