witches'-broom disease

witches'-broom disease

[¦wich·əz ¦brüm di‚zēz]
(plant pathology)
An abnormal cluster of small branches or twigs that grow on a tree or shrub as a result of attack by fungi, viruses, dwarf mistletoes, or insect injury. Also known as hexenbesen; staghead.
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References in periodicals archive ?
This is the first report of a phytoplasma witches'-broom disease associated with faba bean phyllody and stunting infecting faba bean crop in Saudi Arabia and also the first of a Fabaceae phytoplasma in this country.
The major culprit is witches'-broom disease," says Lunde.