Spruce broom rust or yellow witches' broom rust is a fungal plant disease caused by the basidiomycete fungus known as Chrysomyxa arctostaphyli. It occurs exclusively in North America, with the most concentrated outbreaks occurring in northern Arizona and southern Colorado on blue and Engelmann spruce, as well as in Alaska on black and white spruce. This disease alternates its life cycle between two hosts, with the spruce serving as the primary host and bearberry (also known as kinnickinnick) serving as the secondary or alternate host. The name for the disease comes from the distinctive “witches broom”, commonly yellow in color, which forms on the spruce after young needles have been infected. Management must be carried out through physical or mechanical methods, such as the pruning of broo
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| - Chrysomyxa arctostaphyli (fr)
- Spruce broom rust (en)
- Chrysomyxa arctostaphyli (sv)
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| - Chrysomyxa arctostaphyli est une espèce de champignons basidiomycètes de la famille des Pucciniomycetes, originaire d'Amérique du Nord. Cette espèce est un parasite diécique, agent de la rouille-balai de sorcière de l'épinette qui affecte diverses espèces d'Épicéas et dont l'hôte secondaire est la Busserole (Arctostaphylos uva-ursi). (fr)
- Chrysomyxa arctostaphyli är en svampart som beskrevs av Dietel 1894. Chrysomyxa arctostaphyli ingår i släktet Chrysomyxa och familjen Coleosporiaceae. Inga underarter finns listade i Catalogue of Life. (sv)
- Spruce broom rust or yellow witches' broom rust is a fungal plant disease caused by the basidiomycete fungus known as Chrysomyxa arctostaphyli. It occurs exclusively in North America, with the most concentrated outbreaks occurring in northern Arizona and southern Colorado on blue and Engelmann spruce, as well as in Alaska on black and white spruce. This disease alternates its life cycle between two hosts, with the spruce serving as the primary host and bearberry (also known as kinnickinnick) serving as the secondary or alternate host. The name for the disease comes from the distinctive “witches broom”, commonly yellow in color, which forms on the spruce after young needles have been infected. Management must be carried out through physical or mechanical methods, such as the pruning of broo (en)
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| - Peridium coloradense ( Arth. & F. Kern) (en)
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| - Chrysomyxa arctostaphyli est une espèce de champignons basidiomycètes de la famille des Pucciniomycetes, originaire d'Amérique du Nord. Cette espèce est un parasite diécique, agent de la rouille-balai de sorcière de l'épinette qui affecte diverses espèces d'Épicéas et dont l'hôte secondaire est la Busserole (Arctostaphylos uva-ursi). (fr)
- Spruce broom rust or yellow witches' broom rust is a fungal plant disease caused by the basidiomycete fungus known as Chrysomyxa arctostaphyli. It occurs exclusively in North America, with the most concentrated outbreaks occurring in northern Arizona and southern Colorado on blue and Engelmann spruce, as well as in Alaska on black and white spruce. This disease alternates its life cycle between two hosts, with the spruce serving as the primary host and bearberry (also known as kinnickinnick) serving as the secondary or alternate host. The name for the disease comes from the distinctive “witches broom”, commonly yellow in color, which forms on the spruce after young needles have been infected. Management must be carried out through physical or mechanical methods, such as the pruning of brooms or the removal of the secondary host from the area, because no chemical control measures (e.g. fungicides) have yet been determined to be economically effective. Generally, spruce broom rust is seen as a mostly cosmetic issue, and it is very rarely the direct cause of tree death; however, research has shown a reduction in overall productivity and health of infected trees, making it an important issue for logging and timber companies. (en)
- Chrysomyxa arctostaphyli är en svampart som beskrevs av Dietel 1894. Chrysomyxa arctostaphyli ingår i släktet Chrysomyxa och familjen Coleosporiaceae. Inga underarter finns listade i Catalogue of Life. (sv)
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