from The Century Dictionary and Cyclopedia
- n. A popular name for the broom-like tufts of branches developed on the silver-fir, birch, cherry, and other trees in consequence of the attack of a uredineous fungus, Peridermium elatinum.
Sorry, no etymologies found.
Brazil used to be one of the top producers of cacao, until a fungus called witches'-broom struck the crop in the late 1980s and devastated the country's industry.
And, of course, we know on the West Coast you get witches'-broom in the
When Mr. Burgart up in Michigan finds out that the limiting factor practically cleans him out, there is this question of bunch disease with witches'-broom resulting from ground deficiency.
They are the very opposite, and they don't want to be pruned, and if you go pruning them, they are likely to have the witches'-broom.
The bunchy top or witches'-broom caused by a virus, that is serious on the Japanese walnut, _Juglans Sieboldiana_, does not appear to be so virulent on butternut.
Some of the heartnut trees have developed a disease called witches'-broom or bunch disease.
He says, "My conclusions are that in witches'-broom (bunch disease) we have a very bad disease that threatens the black walnut trees everywhere".