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Sap-sucking Bugs Threaten Hemlock Forests
A number of “gray ghost” hemlock trees can be seen along the lower slopes of the Linville Gorge in North Carolina. Photo by Steve Norman, USFS. Sap-sucking insects called hemlock woolly adelgids are...
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Sunlight vs. Hemlock Woolly Adelgids
Robert Jetton, one of the scientists who contributed to the study, infests a hemlock seedling with adelgids. Photo by Bud Mayfield, USFS. Scientists have identified a potential new strategy for...
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Hemlock Seed Banking
Eastern and Carolina hemlock trees in more than 400 counties across 19 states are dead, dying, or threatened by infestation of the invasive hemlock woolly adelgid. Maps show prioritized locations for...
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Conserving Eastern Hemlock
Hemlock woolly adelgids have affected half of all eastern hemlock ecosystems. Photo by Nicholas Tonelli. Where can you go to find an eastern hemlock tree? Although threatened by the hemlock woolly...
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A Hemlock in the Town Square
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,...
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Hemlock Seedlings Released from Shade
HWA crawlers are miniscule and mobile – they can travel on wind currents. Image courtesy of Maine Department of Agriculture, Conservation & Forestry/Maine Forest Service, used with permission....
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A Snapshot in Time of Threats to U.S. Forests
Hemlock woolly adelgid, gypsy moth, emerald ash borer: ask any USDA Forest Service scientist which insects and diseases pose a threat to our forests, and they could probably name a baker’s dozen. A...
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New Seed Orchards Installed with Camcore
The Forest Service planting team at the Beech Creek Orchard. From L to R, Jason Rodrigue, Heather Luczak, Tim Lamb, Gary Kaufman, Sarah Bridges, Mike Hennigan, Dave Perez, Danny Skojac, Justin...
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Hemlock Woolly Adelgids & Their Predator Beetle, Laricobius nigrinus
An adult Laricobius nigrinus beetle on a hemlock twig. Photo by Bryan Mudder, USFS. Laricobius nigrinus is a small beetle that eats an even smaller bug – the hemlock woolly adelgid, or HWA. Since...
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New Manager’s Guide for Controlling Hemlock Woolly Adelgids
A healthy, hemlock branch with a high density of HWA. Such branches are desired locations for releasing adult predator beetles. Photo by Scott Salom, Virginia Tech. An Eastern hemlock can live for 800...
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