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blister rust

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blister rust: see rust rust, in botany, name for various parasitic fungi of the order Uredinales and for the diseases of plants that they cause. Rusts form reddish patches of spores on the host plant. About 7,000 species are known.
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blister rust

Any of several diseases of pines, caused by rust fungi (see fungus) of the genus Cronartium. Blister rust affects sapwood (see wood) and inner bark and produces external blisters from which additional spores of the fungus are released and resin oozes, forming characteristic hardened masses on the trunk. It affects pines of all ages and sizes, retarding growth and weakening stems as it spreads along the trunk, sometimes killing the tree; young trees are killed more quickly than older ones. Measures taken to fight blister rust include growing resistant varieties, destroying nearby alternative host plants, observing strict sanitation measures, and spraying with fungicides.


blister rust [′blis·tər ‚rəst]
(plant pathology)
Any of several diseases of pines caused by rust fungi of the genusCronartium;the sapwood and inner bark are affected and blisters are produced externally.


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Hardin and fellow scientists are currently attempting to document the pine beetle migration to whitebarks while seeking to protect high-value trees, especially those with resistance to blister rust, which in turn should have the more robust health needed to combat beetle epidemics.
In some places, gooseberries are prohibited because they can carry the white pine blister rust fungus.
95 Hardcover Horticulture production/post-harvest handling SB386 Currant growing in the US was banned in the 1960s when white pine blister rust was introduced.
 
 
 
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