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Black knot

Apiosporina morbosa

A species of Apiosporina, Also known as Black knot of cherry

The appearance of black knot (Apiosporina morbosa) is commonly found on various fruit-bearing trees and looks more like abnormally growing bark than it does a fungus. In youth, this bulbous growth is a lighter green but rapidly turns to dark brown and black. Black knot can kill trees and is not easily controllable using fungicides.

Odor:

Generally indistinct, typical mushroom smell.

General Info About Black knot

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Attributes of Black knot

Height

3 - 15 cm

Flesh

Flesh 2 - 5 mm thick; tough; white, brown to black

Spore Print Color

Black

Odor

Generally indistinct, typical mushroom smell.

Flesh Bruises

The flesh or milk does not discolor when bruised or cut.

Growth Form

Scattered

Nutrient Gathering

Parasitic

Substrate

Wood of Living Trees

You can find Black knot by these plants:

Black cherry

Occurence Habitats

Deciduous Woodland

Species Status

Widely distributed in North America

Endangered Species

How to Identify Black knot

Fruiting Body Habit & Habitat

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Habitat of Black knot

The black knot is a pathogen of plants; plum and cherry trees are its usual hosts. The fungus forms a growth on twigs and branches of infected trees.

Scientific Classification of Black knot

Phylum

Class

Order

Family

Genus

Similar Species to Black knot

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Tips for Finding Black knot

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What are Some Tips for Finding Black knot

Inspect the smaller branches of cherry, plum, and date trees for signs of black knot infection.
In wooded areas, focus on examining saplings of black cherry for the presence of black knot.
Search for characteristic swellings and black fungal bodies that indicate black knot infestation.
Carefully examine trees for any abnormal outgrowths or lesions that could be caused by black knot.
Use binoculars to view higher branches that may not be easily accessible for signs of black knot.