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Index of Subjects
Index of Subjects --Apple-Mail-242--336595339 Content-Type: text/plain; charset=US-ASCII; format=flowed; delsp=yes Content-Transfer-Encoding: 7bit Hi David, On 30-Oct-12, at 6:15 PM, David Patriquin wrote: > Thanks Chris Majka for the expert info. Do you have any comments on > the damage it has caused to witherod in areas where it occurs in N.S.? Well, this is how we concluded our paper: "Thus far, the impact of P. viburni in this region has not been noted to be significant, although occasional significant defoliation of shrubs has been reported (G. Selig pers. comm.). Weston and Desurmont (2002) wrote that, "Viburnum leaf beetle has the potential to become a major landscape pest because of its ability to kill susceptible viburnums if allowed to defoliate shrubs for several years in succession." Young (2004) wrote that, "Heavy infestations ... could defoliate shrubs, cause dieback, and eventually kill plants. Costs to homeowners, parks, arboretums, municipalities, and nurseries to manage heavy infestations ... and to replace killed plants could be high. Quarantines imposed ... would represent an economic burden to the many growers who export nursery stock ...." Given such concerns, ongoing monitoring of populations of P. viburni in the region would not be imprudent." Gary Selig showed me photos of Viburnum plants in Bridgewater that had been significantly defoliated (year after year) by P. viburni. In other areas where I have found the beetle, for example in Halifax and Salt Springs, the damage has been much less severe. I've certainly never seen extensive defoliation such as has been found in areas in New England where the beetle is found. Also, the distribution of the Viburnum leaf beetle in the Maritimes has been (at least until this point) spotty and localized. In many areas where I've looked at Viburnum there has been no sign of the beetle at all. Cheers! Chris > Quoting Christopher Majka <c.majka@ns.sympatico.ca>: > >> Hi David, >> >> On 30-Oct-12, at 3:25 PM, David Patriquin wrote: >> >>> 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 >> >> Laurent LeSage and I wrote a paper on Pyrrhalta viburni (the >> Viburnum Leaf Beetle) in the Maritime Provinces back in 2007: >> >> Majka, C.G., and LeSage, L. 2007. Introduced leaf beetles of the >> Maritime Provinces, 3: the Viburnum leaf beetle Pyrrhalta viburni >> (Paykull) (Coleoptera: Chrysomelidae). Proceedings of the >> Entomological Society of Washington 109(2): 454-462. >> >> A PDF version of the paper is available at: >> >> http://www.chebucto.ns.ca/Environment/NHR/PDF/Pyrrhalta_viburni.pdf >> >> We were the ones that reported the earliest North American records >> of the species from 1924 collected in Annapolis Royal, Nova Scotia. >> >> We posited two possible pathways of introduction: >> >> 1. In relation to the early habitations in the area dating from >> 1605 (and, indeed, in preliminary data from the area, the >> proportion of introduced beetles in the area of Annapolis Royal >> appears to be twice as high as the provincial average); and >> >> 2. In association with the Annapolis Royal Nurseries, the largest >> and most comprehensive horticultural nursery in eastern Canada >> established in 1885. By checking historical catalogues were able >> to ascertain that in 1927 the Nurseries were selling three exotic >> Palearctic species of Viburnum (V. opulus L., V. tomentosum >> Shasta, and V. plicatum Thunb.). >> >> There is much more detail and information in the paper itself. In >> any event, the Viburnum Leaf Beetle is now widely established in >> the Maritime Provinces including large areas of the mainland of >> Nova Scotia. The earliest records from both Prince Edward Island >> and New Brunswick are from 1995. >> >> All the best, >> >> Chris >> >> >> Christopher Majka <c.majka@ns.sympatico.ca> | Halifax, Nova >> Scotia, Canada >> >> * Research Associate: Nova Scotia Museum | http://museum.gov.ns.ca/mnh/research-asfr.htm >> * Review Editor: The Coleopterists Bulletin | http://www.coleopsoc.org/ >> * Subject Editor: ZooKeys | http://pensoftonline.net/zookeys/index.php/journal/index >> * Review Editor: Zootaxa | http://www.mapress.com/zootaxa/taxa/Coleoptera.html >> * Associate Editor: Journal of the Acadian Entomological Society | http://www.acadianes.org/journal.html >> * Editor: Atlantic Canada Coleoptera | http://www.chebucto.ns.ca/Environment/NHR/PDF/index.html >> * Editor: Bugguide, Coleoptera http://bugguide.net >> >> Whenever I hear of the capture of rare beetles, I feel like an old >> war- horse at the sound of a trumpet. - Charles Darwin >> >> > > > > David Patriquin > 6165 Murray Place > Halifax, N.S. > Canada B3H 1R9 > e-mail: patriqui@dal.ca > Phone: 902-4235716 > > Professor of Biology (retired) > Dalhousie University http://www.dal.ca > >