PPT-A GEOSPATIAL ANALYSIS OF THE DISTRIBUTION OF THE HEMLOCK WOOLLY ADELGID WITHIN ESTABROOK

By Owen McKenna Since hemlock woolly adelgid populations in New England suffer from high mortality due to extreme winter cold snaps population success relies heavily upon reinfestation Parker et al 1999 The high density regions or hot spots of hemlock woolly adelgid within a forest likely ensure the success of these . Repeated attacks weaken trees cause twig gouting kill branches and over the course of several years cause trees to die What is at risk There are nearly 19 billion balsam fir trees in Mi chigans forests And as the third largest Christmas treegrowing MILLERPIERCE DAVID A ORWIG AND EVAN PREISSER 13 Environ Entomol 392 51357552519 2010 DOI 101603EN09298 ABSTRACT In the eastern United States two invasive specialist insects share a native host plant Eastern hemlock Tsuga canadensis In recent years Other factors can influence the impact of the hemlock woolly adelgid. Other insects, such as elongate hemlock such as biological, chemical, cultural, and silvicultural control to reduce the populatio Tennessee Division of Forestry. Background History of HWA. Hemlock woolly adelgid (HWA) (. Adelges tsugae) . is a non-native insect pest that kills native eastern and carolina hemlocks. . (. Tsuga canadensis . The EASTERN HEMLOCK. Tsuga canadensis. Presented by:. Jayme Longo . Why Hemlocks are Important. Scenic Beauty. 1. Erosion Control. 2. Hydrology Modification. Cooling Temperatures -. Trout Habitat. 3. at the Spectral Curves of Hemlocks Infested With Hemlock Woolly . Adelgid. Cole . Williams, Forestry Major, Department of Natural Resources. cju97@wildcats.unh.edu. Methods. Sampling. – I sampled by filling a one gallon Ziploc bag with foliage. I moistened some tissue to seal in with each bag to keep the samples from drying out. . Distinctive featuresHemipteranWhite wooly massesAdults dark purple to blackAbout 1 mm FlightlessFirst instars and crawlers amberOnly females in North AmericaASEXUAL REPRODUCTION! http://bugguide.net/n Threatened by Hemlock Woolly AdelgidDavid A. Orwig, Harvard Forest &David Kittredge, UMass Extension he introduced HEMLOCK WOOLLY ADELGID (HWA; Adelges tsugae Annand) continues to migrate nor Tennessee Division of Forestry. Background History of HWA. Hemlock woolly adelgid (HWA) (. Adelges tsugae) . is a non-native insect pest that kills native eastern and carolina hemlocks. . (. Tsuga canadensis . Figure 1: Insecticide applied as a soil drench. Figure 2: Insecticide can be injected into the soil around hemlock trees. Rev. 06/10 Foliar Treatments: This refers to treatments that kill adelg Background History of HWA. Hemlock woolly . adelgid. (HWA) . (. Adelges. . tsugae. ) . is a non-native insect pest that kills native eastern hemlock . (. Tsuga. . canadensis. ). . HWA was first discovered in Virginia in 1951 and as of 2012 has spread to 18 eastern states where it has significantly altered or reduced native hemlock populations . Adults and nymphs are 1/16. th. of an inch long and very hard to find. It produces a white wool-like covering to protect itself and its eggs. Hemlock Woolly . Adelgid. Life Cycle. Eggs are protected by woolly sacs that are produced by adult . Modeling the impacts of hemlock woolly adelgid infestation and presalvage harvesting on carbon stocks in northern hemlock . forests. Jeffrey Krebs, Jen Pontius and Paul . Schaberg. Mapping relative risk of HWA impacts on hemlock growth across the northeast. 1mm small wingless insect. Has 2 – 4 generations per year. Injects toxic saliva that damages tree’s vascular tissues, eventually killing the tree. Transported in crawler stage by wind, animals, and people.