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Witches' broom on a coffee (Coffea arabica) seedling caused by phytotoxicity after applying a spray of the herbicide glyphosate.

Witches' broom on a coffee (Coffea arabica) palnt caused by phytotoxicity after applying a spray of the herbicide glyphosate.

 

Witches' broom symptom of koa (Acacia koa) caused by a rust disease (pathogen, the fungus Atelocauda digitata).

Definition

Witches' broom is a disease symptom characterized by an abnormal, massed, brushlike development of many weak shoots arising at or close to the same point.