Post on 24-Feb-2016
description
Hemlock Woolly Adelgid
T. heterophyllaT. mertensiana
T. canadensisT. carolinianaT. chinensis
var. formosana
T. forrestii
T. chinensisT.
dumosa
T. sieboldii
T. diversifolia
Distribution of Tsuga spp. (hemlock) and hemlock woolly adelgid)
*Adapted from: Havill et al. 2008. Phylogeny and biogeography of Tsuga (Pinaceae) inferred from nuclear ribosomal ITS and chloroplast DNA sequence data. Systematic Botany, 33: 478-489.
HWA ovisacs and crawlers
Site of initial introduction
1985 (McClure 1987)
1987 (McClure 1989a)
1989 (McClure 1989b)
1996 (USDA 1997)
1990 (Butin et al 2005)
2002 (USDA 2002)
2005 transect re-survey
20 km
rci.rutgers.edu/~insects/hwaOvisac.gif
Adelgid invasion of New England
Healthy, Going, Gone
Distribution of Laricobius nigrinus (Coleoptera: Derodontidae)
Introduction of L. nigrinus to the eastern US:
L. nigrinus Introduction SitesEstablishedNon-established
Mausel, D.L., Salom, S.M., Kok, L.T., Davis, G.A., 2010. Establishment of the hemlock woolly adelgid predator, Laricobius nigrinus (Coleoptera: Derodontidae), in the Eastern United States. Journal of Environmental Entomology 39, 440-448.
Laricobius nigrinus
eggs larva
pupa adult
Laricobius nigrinus
• Family Derodontidae ( not a lady beetle)• Native to the Pacific NW• Recent work by Dave Mausel shows great
promise• Currently we are testing these on Mt Tom