White Pine Blister Rust in British Columbia II. Can Stands be Hazard Rated?

Hunt, R. S.

doi:10.5558/tfc59030-1

Cited by 24 publications

(20 citation statements)

References 3 publications

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“…Previous researchers have reported relationships similar to those we found between tree diameter and infection by WPBR (Hunt 1983;Campbell and Antos 2000;Conklin 2004). In the limber pine evaluated in this study, trees with diameters greater than 30.5 cm were more than twice as likely to be cankered than trees with diameters of less than 5 cm.…”

Section: Relationships Between Wpbr and Tree And Site Variablessupporting

confidence: 90%

The distribution and incidence of white pine blister rust in central and southeastern Wyoming and northern Colorado

Kearns

Jacobi

2007

Can. J. For. Res.

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A survey of limber pine (Pinus flexilis James) to determine the geographic distribution, incidence, and severity of white pine blister rust (WPBR) throughout 13 study areas in central and southeastern Wyoming and northern Colorado was conducted from 2002 to 2004. The majority (81.1%) of the 18 719 surveyed limber pines >1.37 m tall were classified as healthy, 13.5% were declining or dying from various causes, and 5.4% were dead. WPBR was present on 278 (55%) of the 504 survey plots. Incidence of the disease ranged from 0% to 100% and averaged 15.5% over all the plots and 28.0% on the infested plots. Likelihood of infection by WPBR was significantly greater for limber pines in larger diameter classes. Incidence was negatively correlated with elevation and positively correlated with geographic position, with more northerly and easterly plots having higher incidences of WPBR. Incidence varied by slope position and did not vary by aspect, slope configuration, or degree of canopy closure. The current level of infestation in central and southeastern Wyoming and northern Colorado has been attained within the past two to four decades. With time, the pathogen may spread to currently uninfested white pine populations and intensify throughout its current distribution impacting valuable ecosystems.Résumé : Un inventaire du pin flexible (Pinus flexilis James) a été réalisé de 2002 à 2004 dans 13 zones d'étude situées dans le centre et le sud-est du Wyoming et le nord du Colorado pour déterminer la répartition géographique, l'incidence et la sévérité de la rouille vésiculeuse du pin blanc (RVPB). La majorité (81,1 %) des 18 719 pins flexibles échantillonnés de plus de 1,37 m de haut ont été classés comme sains, 13,5 % dépérissaient ou étaient mourants sous l'effet de diverses causes et 5,4 % étaient morts. La RVPB était présente dans 278 (55 %) des 504 places-échantillons. L'incidence de la maladie variait de 0 % à 100 % et atteignait en moyenne 15,5 % dans l'ensemble des places-échantillons et 28,0 % dans les places-échantillons infectées. Les risques d'infection par la RVPB étaient significativement plus élevés pour les pins flexibles dans les classes de diamètre supérieures. L'incidence était négativement corrélée avec l'altitude et positivement corrélée avec la position géographique : les places-échantillons les plus au nord et les plus à l'est avaient les plus fortes incidences de RVPB. L'incidence variait selon la position de la pente mais non selon l'exposition, la configuration de la pente ou le degré de fermeture du couvert. Le niveau actuel d'infection dans le centre et le sud-est du Wyoming et le nord du Colorado a été atteint au cours des deux à quatre dernières décennies. Avec le temps, le pathogène pourrait progresser vers les populations de pin blanc non infectées et l'infection pourrait s'intensifier partout où la maladie est actuellement présente et affecter des écosystèmes de grande valeur.[Traduit par la Rédaction]

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Section: Relationships Between Wpbr and Tree And Site Variablessupporting

confidence: 90%

The distribution and incidence of white pine blister rust in central and southeastern Wyoming and northern Colorado

Kearns

Jacobi

2007

Can. J. For. Res.

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“…Thus, avoidance of planting current resistant stock or planting a mixture of tree species on the highest hazard sites for white pine blister rust may be prudent. However, further research is needed to characterize which sites have the highest hazard for blister rust (Goddard et al 1985;Hagle et al 1989;Hunt 1983;Muller 2002). Large geographic movement of WWP seed sources also may affect rust resistance or general survival and growth (Hunt 2004a;King and Hunt 2004).…”

Section: Cronartium Ribicola Resistance In Western White Pinementioning

confidence: 98%

Resistance breeding against nonnative pathogens in forest trees — current successes in North America

Sniezko¹

2006

Canadian Journal of Plant Pathology

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Nonnative invasive pathogens have decimated North American forests for over 100 years, and additional pathogens continue to arrive. These pathogens are destined to be permanent fixtures in the ecosystem. In many cases, management activities have been unsuccessful in slowing the spread of these pathogens or in restoring forests. Genetic resistance potentially provides an invaluable management tool for restoring these species or using them in plantations. Although native tree species are highly susceptible to some nonnative pathogens, a low frequency of resistance is present in even those North American host species most affected. Classical breeding methods can produce genetically diverse and resistant populations for reforestation or restoration of natural forests. However, any operational program for developing resistant populations of forest trees must contend with relatively long generation times, as well as the long-lived nature of trees and the potential of the pathogen to evolve. Western white pine (Pinus monticola), PortOrford-cedar (Chamaecyparis lawsoniana), American chestnut (Castanea dentata), and American elm (Ulmus americana) are examples of species for which there are successful breeding programs for disease resistance. Examples from these species, with a particular focus on western white pine and white pine blister rust [Cronartium ribicola] resistance, will be used to illustrate some of the successes in operational programs, as well as to discuss some of the research needs and current unknowns in developing durable resistance. Some of these programs have been ongoing for 50 years, while the Port-Orford-cedar program began only in the last decade. Resistant seedlings from several programs are now being used in reforestation and restoration. 279Résumé : Les organismes pathogènes envahissants exotiques ont décimé les forêts nord-américaines depuis plus de 100 ans et de nouveaux agents pathogènes continuent d'arriver. Ces agents pathogènes sont destinés à devenir des résidents permanents de l'écosystème. Dans plusieurs cas, des activités de lutte contre ces agents pathogènes n'ont pas réussi à ralentir leur dispersion ou à restaurer les forêts. La résistance génétique a le potentiel pour être un outil d'aménagement inestimable pour la restauration de ces espèces ou pour leur utilisation en plantation. Même si les essences indigènes sont très sensibles à certains agents pathogènes exotiques, un faible taux de résistance est présent, même dans les essences nord-américaines les plus affectées. Les méthodes classiques d'amélioration génétique peuvent produire des populations génétiquement diverses et résistantes pour la reforestation ou la restauration de forêts naturelles. Cependant, tout programme opérationnel de développement de populations résistantes d'arbres forestiers doit composer avec des durées de génération relativement longues, ainsi qu'avec la longévité des arbres et le potentiel d'évolution des agents pathogènes. Le pin argenté (Pinus monticola), le faux cyprès de Lawson (Chamaecyparis lawson...

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“…By delineating rust hazard zones, managers can focus white pine management in those areas where successful management is more likely and prepare for restoration in areas predicted to be heavily impacted. Hazard rating has been used in the Lake States (Katovich and others 2004), British Columbia (Hunt 1983), eastern United States (Charlton 1963), and Northern Region (Hagle and others 1989).…”

Section: Hazard Ratingmentioning

confidence: 99%

Options for the management of white pine blister rust in the Rocky Mountain Region

Burns¹,

Schoettle²,

Jacobi³

et al. 2008

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You may order additional copies of this publication by sending your mailing information in label form through one of the following media. Please specify the publication title and series number. cover photos (clockwise beginning top left): A stem canker causes topkill in limber pine; close-up of rust blisters and spores; using a pole pruner to collect RM bristlecone pine cones; screening RM bristlecone pine for blister rust resistance; white pine regeneration following fire. Fort Collins Service Center

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White Pine Blister Rust in British Columbia II. Can Stands be Hazard Rated?

Cited by 24 publications

References 3 publications

The distribution and incidence of white pine blister rust in central and southeastern Wyoming and northern Colorado

The distribution and incidence of white pine blister rust in central and southeastern Wyoming and northern Colorado

Resistance breeding against nonnative pathogens in forest trees — current successes in North America

Options for the management of white pine blister rust in the Rocky Mountain Region

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