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Latest Tsuga Stories

2014-03-21 16:21:26

HARRISBURG, Pa., March 21, 2014 /PRNewswire-USNewswire/ -- The past winter of seemingly unending snowstorms and frigid temperatures has proved to be a strong ally for state woodland managers battling the No. 1 enemy of Pennsylvania hemlocks, but the reprieve could be short-lived, Department of Conservation and Natural Resources officials said today. "The hemlock woolly adelgid has been dealt a deadly blow, ongoing forest research is showing us, but enough of the invasive insects...

2013-04-08 12:22:48

HARRISBURG, Pa., April 8, 2013 /PRNewswire-USNewswire/ -- A non-native, invasive insect that attacks and kills Eastern hemlock trees has advanced westward across Pennsylvania to Clarion and Jefferson counties where infestations have been confirmed in two state parks. "The hemlock woolly adelgid, a pervasive insect threat that has killed thousands of hemlocks across the state, has been detected in both Cook Forest State Park, Clarion County, and Clear Creek State Park in neighboring Jefferson...

Death Of Hemlock Trees Creates New Life For Hardwood Trees
2012-12-20 16:47:46

University of Illinois College of Agricultural, Consumer and Environmental Sciences Due to the introduction of exotic pests and pathogens, tree species are being eliminated one by one from forest ecosystems. In some cases, scientists can observe immediately how their loss affects the environment, whereas in other cases, creative puzzle solving and analysis reveal unexpected repercussions. In the case of the loss of the hemlock tree, University of Illinois landscape and ecosystem ecologist...

Autumn In New England Losing Its Color
2012-09-26 16:21:23

April Flowers for redOrbit.com - Your Universe Online New England is famous for its fall foliage; the vibrant reds, yellows and oranges that make the forest look like a patchwork quilt and the ground look like it is covered in confetti. And each year, thousands of visitors flock to places like the Massachusetts' Berkshires or Litchfield, Connecticut to take in the majestic beauty of the Earth changing seasons. According to the National Science Foundation's (NSF) Long-Term Ecological...

2012-01-10 23:48:51

Thousands of broken trees line the banks of the Chattooga River. The dead gray stabs were once evergreen monsters offering shade to trout and picturesque views to visitors. These Eastern hemlocks are dying rapidly, and University of Georgia researchers are working to save them. One tiny insect, the hemlock woolly adelgid, is to blame. The Asian insect first appeared in the eastern U.S. in Richmond, Va., in the 1950s. In 2003, it crossed the river from South Carolina and started feeding on...

2011-09-27 14:22:13

An analysis of two decades of data collected by the U.S. Forest Service´s Forest and Inventory Analysis (FIA) program shows that the live volume of hemlocks in the eastern United States is increasing despite infestations of hemlock woolly adelgidthat have decimated local populations. The information comes from an e-Science Update co-authored by scientists from two U.S. Forest Service research stations, the Northern Research Station (NRS) and the Southern Research Station (SRS), and...

2011-09-27 11:33:25

A recent analysis of two decades of USDA Forest Service Forest Inventory and Analysis (FIA) data shows the live volume of hemlocks in the eastern United States still increasing despite spreading infestations of hemlock woolly adelgid. FIA scientists from the Forest Service Southern Research Station (SRS) and Northern Research Station (NRS) published the information as an SRS e-Science Update in early August. The FIA researchers conducted the analysis for this update on 20 years of data...

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2011-07-22 05:44:32

By Joshua E. Brown, University of Vermont Hemlock is the third most common tree species in Vermont. But it soon may drop off the list, going the way of the now-vanished chestnut and elm. An invasive pest, hemlock woolly adelgid, has been marching and munching its way north along the Appalachians "” killing pretty much every hemlock it can sink its sap-sucking mouthparts into. The adelgid recently arrived in southern Vermont. So far, only extreme cold stops the hemlock woolly adelgid....

2010-11-10 16:34:14

New hemlock hybrids that are tolerant to the invasive insect known as hemlock woolly adelgid have been created by U.S. Department of Agriculture (USDA) scientists. Geneticist Richard Olsen and horticulturist Sue Bentz of USDA's Agricultural Research Service (ARS) teamed up with Forest Service entomologist Mike Montgomery to breed and select these tolerant hybrids. Olsen and Bentz work in the U.S. National Arboretum's Floral and Nursery Plants Research Unit in Beltsville, Md. The arboretum is...

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2009-02-27 08:22:23

New research by U.S. Forest Service Southern Research Station (SRS) scientists and partners suggests the hemlock woolly adelgid is killing hemlock trees faster than expected in the southern Appalachians and rapidly altering the carbon cycle of these forests. SRS researchers and cooperators from the University of Georgia published the findings in the most recent issue of the journal Ecosystems. "The study marks the first time that scientists have tracked the short-term effects hemlock woolly...