Introduction. White Pine Blister Rust (WPBR), caused by the fungus Cronartium ribicola, is one of the most important diseases of white pines. C. ribicola infects white pines and Ribes spp., causing severe long-term damage and disruption to ecosystems by altering patterns of natural. White pine blister rust, a widely known tree disease in North America, is caused by the introduced fungus Cronartium ribicola. C. ribicola is a.

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Ribes and gooseberries Ribessubgenus: Plant promoter activated by fungal infection. Blister rust infection is favored by cool, moist conditions, and the disease tends to be more prevalent in low-lying areas such as creek bottoms, swampy depressions and openings in timber stands.

Diseases of Pacific Coast Conifers. Infections often occur on low branches close to the ground on young trees, so pruning of white pine can also be effective in multiple ways, as it improves the quality of timber by creating more knot-free timber, and reduces the likelihood of infection from the blister rust to a small extent. Forest Science, 27 4: Yi and Kim successfully inoculated native Pedicularis and Ribes montigenum from Pinus koraensis, but not R.

For over a century, white pine blister rust Cronartium ribicola has linked white pines Strobus with currants and gooseberries Ribes in a complex and serious disease epidemic in Asia, Europe, and North America. Figure 1 Genetic resistance The occurrence of apparently resistant trees in areas where the rust was severe Figure 15 was recognized in eastern white pine as early as Occurrence and importance of rust fungi in Hungarian forests.

White pine blister rust

Factors important to development of wild Ribes include any soil disturbance, such as fire, logging, and snow and wind damage, which stimulates dormant Ribes seeds to germinate. The basidiospores are small, thin-walled and relatively short-lived. There have been occasional reports that Pedicularis and Castilleja spp. California; Montana ; Oregon ; Wyoming. Notes on Wisconsin parasitic fungi.


Experimental evidence of heterothallism in Cronartium ribicola.

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The spores from these blisters aeciospores cause new infections on the growing leaves of Ribes plants but are not capable of causing infections on pine. Canadian Journal of Genetics and Cytology, 20 3: Instituto Botanica, Universitatis Turkuensis.

Dominating North American forest pathology issues of the 20th century. Intra-population variation in rust, causing different spot colours on a tree, have been found McDonald and Hoff, Sawada, ; Yang, ; Chen, White pine in the American west: The centre of origin of C. Fruit Varieties Journal, 52 1: Evaluation of several new fungicides for the control of black currant diseases. In addition to creating favorable conditions for infection, air currents can carry spores for relatively long distances, i.

Plant Disease, 76 5: Some reduction in aeciospore production may result from feeding by slugs Hunt,and mice, squirrels, hares and porcupines Powell, In northern Wisconsin, USA, a survey showed the topographic position, aspect, slope, tree density, habitat type, and the presence or absence of bole cankers, at each plot.

Telia appearing in the uredinia and producing spore columns up to 2 mm long and 0. Nytt Magasin for Botanikk, This collection of environmental characteristics are common in the Northern Hemisphere, causing many areas in the United States to be labeled at hazard zones for the genus Pinus. During moist weather in August and early September, after seasonally cool weather has prevailed for about 2 weeks, telia on leaves of Ribes plants produce spores that cause new infections on pine needles.


The inheritance and mechanisms of resistance are best known for western white pine and sugar pine; but new work is extending an understanding of genetics to all the western species of white pine. Forestry Chronicle, 62 1: Pluta S, Broniarek-Niemiec A, Retrieved from ” https: Its biocontrol potential seems limited Wicker et al.

University of Toronto Press, Cgonartium white pine tree-improvement program for British Columbia. The currant cultivars ‘Cornet’, ‘Consort’, and ‘Crusader’ are resistant to white pine blister rust.

White pine blister rust hazard rating: HR was not found in whitebark pine P. Uredinales of West Pakistan. Journal of Forestry, However, the nuclear cycle i. Rodent and lagomorph damage to pine stem rusts with special mention of ribucola in Alberta.

These projects were primarily ribicoal and soil conservation. American and Eurasian species were selected and combined into the germplasm base of European and American breeding programmes in the s. Washington State University Cooperative Extension, Theoretical and Applied Cronattium, 91 8: Changing forests and forest management policy in relation to dealing with forest diseases. Some European and Asian white pines e. They differ from C. Local pathosystems wherein the rust and its hosts coexist with reduced damage could arise by several processes.

Although excision of existing cankers from stems may be unsuccessful since detection of infected tissue can be difficult, certain reccomendations can be made to improve success.