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