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John A. Muir and Richard S. Hunt

Introductions of white pine blister rust (WPBR, causal fungus: Cronartium ribicola J.C. Fischer) to eastern and western North America before 1915 caused such extensive damage that western white pine (Pinus monticola D. Don) was essentially abandoned as a manageable forest tree species for over 60 years. Recent results from WPBR resistance selection and breeding programs, and from field trials of tree spacing, pruning and bark excision treatments have supported efforts to increase establishment and to intensively manage western white pine. Western white pine is a desirable component in many forested areas because of its faster growth and much higher value compared to many other associated tree species. It also has a low susceptibility to armillaria root disease caused by Armillaria ostoyae (Romagnesi) Herink and laminated root rot, caused by Phellinus weirii (Murr.) Gilb. Some regulations, e.g., Forest Practices Code of British Columbia (BC) Act, require anyone who harvests timber on provincial forestland and uses western white pine for reforestation to either plant genetically resistant western white pine stock or prune susceptible young trees for protection. Risks of increased WPBR associated with increased commercial cultivation of gooseberries and currants (Ribes L.) have yet to be determined. However, major threats appear to include 1) increase in local amounts of spores for nearby infection of pines; and 2) possible introductions or development of new, virulent races of C. ribicola, particularly from eastern to Pacific northwestern North America. In view of these possible threats, we recommend that existing regulations and legislation should be amended, or possibly new measures enacted, to permit propagation and commercial cultivation only of varieties of Ribes that are immune or highly resistant to WPBR.

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Benjamin L. Green, Richard W. Harper, and Daniel A. Lass

urban forester/tree warden charged with the day-to-day care of community trees, the most important limiting factor relative to successful tree planting and urban forest management are the resources required to acquire and plant street trees ( Stobbart

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resources required to plant street trees are important factors in successful tree planting and urban forest management. Green et al. (p. 651) compared the planting cost of four different planting systems (balled-and-burlapped, bare-root, pot

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Ling Ma, Xingquan Rao, and Xiaoyang Chen

potential risk of flooding during the rainy season. In forest management, information regarding WT of plant species is necessary to cope with flooding. In addition, ecological restoration in depression areas or flooded watersheds must involve waterlogging

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Geoffrey C. Denny, Michael A. Arnold, and Wayne A. Mackay

improvement programs seeking an improved product for use in difficult ecophysiographic situations ( Zobel and Talbert, 1984 ). In forest management, the concept of seed source and provenance is widely recognized and used ( Zobel and Talbert, 1984 ). However

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Mónica Moura, Maria Irene Candeias, and Luís Silva

rooting of Viburnum tinus L 33 40 Ciccarese L. Lucci S. Mattsson A. Nursery production and stand establishment of broad-leaves to promote sustainable forest management APAT Rome, Italy Debergh, P.C. 1988 Micropropagation of woody species—State of the art

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Alvine Ornella Tchouga, Vincent Deblauwe, Stephanie Astride Mouafi Djabou, Giovanni Forgione, Rachid Hanna, and Nicolas Niemenak

.) Del. Agrofor. Syst. 78 151 158 Bongjoh, C.A. Nsangou, M. 2001 Gap disturbance regimes and regeneration dynamics of commercial timber tree species in a southern Cameroon forest, p. 112–124. In: “Sustainable Forest Management of African Rain Forest

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Kristen A. Saksa, Thomas W. Ilvento, and Susan S. Barton

Ecological and aesthetic values in urban forest management Urban For. Urban Green. 1 3 135 149 University of Delaware 2010 A sustainable University of Delaware. 2010. 16 Dec. 2010. < > Weiler, B. Smith, L

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Rob Kuper

forest management activities: Findings on public preferences. U.S. Dept. Agr., Intermountain Forest Range Expt. Sta., Res. Paper INT-262 Berlin, B. Kay, P. 1969 Basic color terms. Univ. California Press, Berkeley, CA Berlyne, D.E. 1963 Complexity and

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Deborah Dean, Phillip A. Wadl, Denita Hadziabdic, William E. Klingeman, Bonnie H. Ownley, Timothy A. Rinehart, Adam J. Dattilo, Brian Scheffler, and Robert N. Trigiano

ecologically sustainable forest management Conserv. Biol. 14 941 950 Mantel, N.A. 1967 The detection of disease clustering and a generalized regression approach Cancer Res. 27 209 220 Marra, F.P. Caruso, T. Costa, F. Di Vaiio, C. Mafrica, R. Marchese, A. 2013