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Hemlock Woolly Adelgid

Hemlock Woolly Adelgid . Distribution of Tsuga spp. (hemlock) and hemlock woolly adelgid). T. heterophylla T. mertensiana. T. canadensis. T. caroliniana. T. diversifolia. T. chinensis. T. sieboldii . T. dumosa. T. forrestii. T. chinensis var. formosana.

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Hemlock Woolly Adelgid

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  1. Hemlock Woolly Adelgid

  2. Distribution of Tsuga spp. (hemlock) and hemlock woolly adelgid) T. heterophylla T. mertensiana T. canadensis T. caroliniana T. diversifolia T. chinensis T. sieboldii T. dumosa T. forrestii T. chinensis var. formosana *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.

  3. HWA ovisacs and crawlers Site of initial introduction

  4. 2002 (USDA 2002) 20 km 1996 (USDA 1997) 1990 (Butin et al 2005) rci.rutgers.edu/~insects/hwaOvisac.gif 1985 (McClure 1987) Adelgid invasion of New England 1989 (McClure 1989b) 1987 (McClure 1989a) 2005 transect re-survey

  5. Healthy, Going, Gone

  6. Distribution of Laricobius nigrinus (Coleoptera: Derodontidae)

  7. Introduction of L. nigrinus to the eastern US: L. nigrinus Introduction Sites Established Non-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.

  8. Laricobius nigrinus eggs larva pupa adult

  9. 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

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