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Witch's brooms on downy birch, caused by the fungus Taphrina betulina Witch's broom on a white pine. Witch's broom in Yamaska National Park, QC. Witch's broom or witches' broom is a deformity in a woody plant, typically a tree, where the natural structure of the plant is changed. A dense mass of shoots grows from a single point, with the ...
There can be several witches broom in a tree. [4] Witches broom, formed by Taphrina betulina can be found on dwarf birch (Betula nana), Betula nana x pubescens, silver birch (Betula pendula), downy birch (Betula pubescens) and Betula pubescens var.glabrata. [1] A phytoplasma can also form similar looking witches broom on birch. [4]
Cystotheca lanestris, the live oak witch's broom fungus, is a species of mildew that infects buds and induces stem galls called witch's brooms on oak trees in California, Arizona, and Mexico in North America. [2] [3] Witch's brooms are "abnormal clusters of shoots that are thickened, elongated, and highly branched."
Printable version; Page information; Get shortened URL; Download QR code; ... English: Witch's broom growth in a white pine in central Massachusetts. Date: October 2008:
While the diagrams in these first articles were hand-drawn, the advent of typesetting software such as LaTeX and PGF/TikZ made the publication of string diagrams more wide-spread. [ 5 ] The existential graphs and diagrammatic reasoning of Charles Sanders Peirce are arguably the oldest form of string diagrams, they are interpreted in the ...
A besom (/ ˈ b iː z əm /) is a broom, a household implement used for sweeping. The term is mostly reserved for a traditional broom constructed from a bundle of twigs tied to a stout pole. The twigs used could be broom (i.e. Genista, from which comes the modern name "broom" for the tool), heather or similar.
Moniliophthora perniciosa (previously Crinipellis perniciosa) [1] is a fungus that causes "witches' broom disease" (WBD) of the cocoa tree T. cacao. [2] This pathogen is currently limited to South America, Panama and the Caribbean, and is perhaps one of the best-known cocoa diseases, thought to have co-evolved with cocoa in its centre of origin (first recorded in the Brazilian Amazon in 1785).
Lilac witches’-broom (LWB) is a disease of lilacs caused by Candidatus Phytoplasma fraxini. This Phytoplasma was first identified as the causal agent of Ash yellows and has since been attributed to both diseases.