witches'-broom

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.

With DNA of chocolate nearly decoded by scientists, could sweeter treats await? 2010

And, of course, we know on the West Coast you get witches'-broom in the

Northern Nut Growers Association Report of the Proceedings at the 41st Annual Meeting Pleasant Valley, New York, August 28, 29 and 30, 1950

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.

Northern Nut Growers Association Report of the Proceedings at the 41st Annual Meeting Pleasant Valley, New York, August 28, 29 and 30, 1950

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.

Northern Nut Growers Association Report of the Proceedings at the 41st Annual Meeting Pleasant Valley, New York, August 28, 29 and 30, 1950

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.

Northern Nut Growers Association Report of the Proceedings at the 41st Annual Meeting Pleasant Valley, New York, August 28, 29 and 30, 1950

Some of the heartnut trees have developed a disease called witches'-broom or bunch disease.

Northern Nut Growers Association Report of the Proceedings at the 41st Annual Meeting Pleasant Valley, New York, August 28, 29 and 30, 1950

He says, "My conclusions are that in witches'-broom (bunch disease) we have a very bad disease that threatens the black walnut trees everywhere".

Northern Nut Growers Association Report of the Proceedings at the Forty-Second Annual Meeting Urbana, Illinois, August 28, 29 and 30, 1951