Tag: Hemlock woolly adelgid

New Resource on Invasive Species

by Sarah Farmer, SRS Science Communications  • 
Eastern hemlock, American chestnut, sassafras, redbay, every member of the ash family, and many others are plagued by non-native invasive species. A new book synthesizes current science on species invading U.S. forests, grasslands, and waterways. The book was published by Springer, and the entire book is available to download. The book covers invasive species of…  More 

New Manager’s Guide for Controlling Hemlock Woolly Adelgids

by Sarah Farmer, SRS Science Communications  • 
An Eastern hemlock can live for 800 years, anchoring ecosystems from its roots to its branches. But a bug that’s a speck by the eye can kill these giants in just a few years. Foresters, entomologists, silviculturists, physiologists, and other experts have been working together to keep hemlock trees alive and reduce the impact of…  More 

Hemlock Woolly Adelgids & Their Predator Beetle, Laricobius nigrinus

by Sarah Farmer, SRS Science Communications  • 
Laricobius nigrinus is a small beetle that eats an even smaller bug – the hemlock woolly adelgid, or HWA. Since 2003, Laricobius has been used to help control HWA. But the beetle, which is native to western North America, is only active during the fall, winter and early spring. Recently, USDA Forest Service research entomologist…  More 

White Oak Regeneration in Canopy Gaps

by Jennifer Moore Myers, SRS Science Communications, and Stacy Clark, SRS Research Forester  • 
In February 2020, USDA Forest Service scientist Stacy Clark planted 720 white oak (Quercus alba) seedlings on the Pisgah National Forest in western North Carolina. “White oak is declining in abundance across the eastern U.S., and we are concerned that wildlife species and industries around cooperages, distilleries, and flooring will be negatively affected without proactive…  More 

New Seed Orchards Installed with Camcore

by Sarah Farmer, SRS Science Communications  • 
Andy Whittier has collected hundreds of thousands of seeds during his 17 years with Camcore and the USDA Forest Service. Whittier regularly tests seed germination rates in order to evaluate their quality. That’s how he ended up with 1,200 Eastern hemlocks (Tsuga canadensis) in a greenhouse in Waynesville, North Carolina. The hemlocks were healthy three-year-old…  More 

How Tree Diversity Affects Invasive Forest Pests

by Jennifer Moore Myers, SRS Science Communications  • 
“Invasive insects and diseases pose both ecological and economic threats to our forest ecosystems,” says Qinfeng Guo, USDA Forest Service research ecologist. Guo is the lead author of a broad-scale study of U.S. forest data that examines the relationship between the number of native tree species and the number of nonnative forest pests. Across their…  More 

Hemlock Seedlings Released from Shade

by Sarah Farmer, SRS Science Communications  • 
Eastern hemlock typically grows in shady environments, but its world is now infested by hemlock woolly adelgids (HWA). The miniscule sap-sucking insects can kill mature trees in less than five years. “Eastern hemlock is a shade-tolerant species,” says USDA Forest Service research entomologist Bud Mayfield. “But extra sunlight may help it survive HWA infestation.” Extra…  More 

A Hemlock in the Town Square

by Remi Shaull-Thompson, SRS Science Communications Intern  • 
This summer, I joined USDA Forest Service scientist Andy Whittier for a day of field work as a part of my internship with SRS Public Affairs and Science Communications. We traveled to Green Mountain, NC to check up on an experiment led by research entomologist Bud Mayfield on hemlock trees. Throughout the eastern U.S., the invasive…  More 

The Thorny Economics of Preventing Exotic Species Introductions

by Sarah Farmer, SRS Science Communications  • 
What if we lose tree species we know, love, and need? It has happened before. “Look at what happened to the American chestnut,” says U.S. Forest Service research forester Thomas Holmes. “Look at what’s happening right now to hemlock, redbay, and ash trees.” All three species, as well as many more, are threatened by non-native…  More 

Conserving Eastern Hemlock

by Sarah Farmer, SRS Science Communications  • 
Where can you go to find an eastern hemlock tree? Although threatened by the hemlock woolly adelgid, eastern hemlock has an extensive range. “Eastern hemlock grows throughout the southern Appalachians,” says U.S. Forest Service collaborator and ecologist Kevin Potter. Potter is also a forestry faculty member at North Carolina State University. “Hemlock grows in the…  More