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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V9o-B2fr0m8 Song YS, There are some indications that geographic speciation is currently taking place. Successful implementation requires long-term support for coordinated efforts of management and research agencies, forest industry and an informed public.

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Forest Science, 23 3: Effect of white pine blister rust Cronartium ribicola and rust-resistance breeding on genetic variation in western white pine Pinus monticola. Diagnosis Top of page Spore morphology can separate C.

Genomic diversity among pine rusts. Plant Disease, 2: A model of rust epidemics has been created MacDonald et al. The next method attempted was to prevent further introduction and spread of the disease by laws i.

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The mean incidence of infection was 7. This margin can be easily detected by rubbing the area with a wet cloth. Blockage of pine stomata by wax may be a ‘defence mechanism’ Patton et al. White pines, especially young trees, and plants belonging to the genus Ribes currants and gooseberries are susceptible to the disease.

Origin and distribution of Cr2, a gene for resistance to white pine blister rust in natural populations of western white pine. Taxonomy, phylogeny and coevolution cornartium pines and their stem rusts.

Description Top of page After Laundon and Rainbow Hunt and Patton and Spearinoculated Ribes species successfully. This disease was introduced from Asia through Europe into North America ca.

White pine blister rust, Cronartium ribicola, Infestation incidence for selected areas of New Hampshire. White pine communities ribicolq in elevation from lower to upper treeline, in successional stage from seral to climax, and in stand type from krummholz to closed-canopy forest.

Differentiation among Cronartium species from northeast China by isozyme analysis. Given appropriate management, white pines could thrive as valuable commercial and ecologically important keystone species.

Silvae Genetica, 43 4: Non-native invasive pathogens such as white pine blister rust C. Aeciospores Figure 9D can survive for several months and are wind-borne for long distances where they infect the alternate hosts Ribes spp. Plantesygdomme i Danmark Signs of the disease on leaves of Ribes are orange pustules that develop on the underside of leaves below the chlorotic spots Figure 7.


Grossularia were domesticated from European species.

Cronartium ribicola – Bugwoodwiki

Basidiospores are more susceptible to drying and solar damage Spaulding, These spores cause repeated new infections on Ribes leaves from May through late summer, when another spore-bearing structure of the rust fungus appears. Current research suggests that resistance is more complex than previously modelled, but new molecular techniques offer useful methods for investigating the white pine blister rust pathosystem.

White five-needle pines Pinus spp.

Disease Cycle and Epidemiology Figure 9 The blister rust cycle Figure 9 starts in the fall when pine needles are infected by basidiospores from the alternate host Ribes spp.

State Plant Pathology Inst. Cloning and characterization of a cDNA of cro rI from the white pine blister rust fungus Cronartium ribicola.

Incorporating several different types of these mechanisms helps guard against the loss of resistance based on a single type.