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Index of Subjects Of course I meant Gary Schenider, not Gary Saunders, as the person from McPhail Woods, Thanks to Bob M. for pointing that out & apologies to both Garys! Quoting David Patriquin <patriqui@dal.ca>: > In Halifax both American Elm and Scotch Elm are common, possibly > others. American elm is highly susceptible to DED, Scotch apparently > has some resistance. I think it is only a matter of time before most > of the American elms go down. The restricted species diversity of NS > forests and rising issues with both native pests (set off by > climate change) and exotic pests in N.A. is a major reason in my > not-professional-opinion for introducing more species from the south > as our climate becomes suitable for them. > > Speaking of pests, Gary Saunders of McPhail Woods in PEI gave a > wonderful presentation to the NS Wild Flora Society last week on > "Restoring the Acadian Forest" in which he mentioned that an > invasive pest is aggressively chewing down witherod (wild raisin) in > PEI, something I think we should be on the lookout for in NS. I > believe it is the Viburnum Leaf Beetle, > http://www.gov.pe.ca/af/agweb/index.php3?number=74367&lang=f > It has been sighted in Nova Scotia on domestic Vibrunums (2005), and > possibly as early as 1924. > http://www.hort.cornell.edu/vlb/csphoto.html > http://cat.inist.fr/?aModele=afficheN&cpsidt=18705014 > http://www.entsoc.org/PDF/Pubs/Periodicals/AE/AE-2007/Summer/Weston.pdf > > - David Patriquin > > > > > > > Quoting Dusan Soudek <soudekd@ns.sympatico.ca>: > >> I've been following the debate triggered by G.L. Saunders' and >> Nick Hill's recent opinion pieces in the Herald on the past and the >> future of the Acadian Forest, and am somewhat surprised that the >> American Elm, our most endangered native tree species, hasn't been >> mentioned once. >> This species once dominated the rich alluvial lands along the >> lower courses of our rivers. These lands were extremely attractive >> to early European settlers, and many were cleared for agriculture >> centuries ago. The second blow to the American Elm was the arrival >> of Dutch Elm Disease in the 20th century, which wiped out much of >> the remnant population. >> Yet one can still find an apparently healthy elm tree in the wild >> (or the semi-wild) here and there. Are these rare individuals >> healthy due to chance alone, i.e. their relative isolation from >> infected conspecific individuals, or do they represent resistant >> genotypes? >> Elm habitat in our province is under-represented in our system of >> protected areas, because much of it is being farmed, inhabited, or >> simply isn't "wild" enough to be protected. There seems to be no >> local effort to re-establish resistant >> genotypes of American Elm into the Acadian Forest Region. >> Paradoxically, elm trees are quite common on the streets of >> Halifax. What species are they? Are any of them American Elm? >> If so, what might be their provenance? >> Dusan Soudek >>
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