Could there be hope for those eastern hemlocks that haven’t already succumbed to this cottony sucker-of-death? Is the adelgid doomed?
ASHEVILLE ~ A new method of attacking the pest that destroys hemlock trees–a technique that involves the dairy product whey and a fungus–shows promise but may be a long way from making an impact.
About 74,000 acres of the Great Smoky Mountains National Park’s 500,000 acres contain hemlocks, and “pretty much every place we have hemlocks, we have adelgids,” said park spokesman Bob Miller.
The park uses a crew of up to 16 people in peak season who spray about 2,000 acres of trees with a soapy solution and inject the insecticide, a program that will cost $812,000 this year. Predator beetles are employed in more remote areas.
We probably won’t live to see if this experiment makes any real difference. And there will be places–Goose Creek, for instance–where it will already be too late. I doubt we’ll have any living hemlocks left in five years.
There are several massive hemlocks along the steepest part of our road, dead and leaning, and every day I expect to see the last night’s winds or rain have sent a massive branchy trunk down across our single-lane road. Ann is most likely to discover such an event as she drives to work in the morning dark.
When a smaller one fell last winter, the highway department came to deal with it, sure enough. But rather than clear it away, they simply pushed the branches and tops and bark and chunks of rotten trunk down the bank toward the creek. It looked awful, and still does. I can imagine what the debris field will be from one of the giants. Its corpse will be scattered across a half acre. And then another. And another.
But maybe some can be saved. The Smokies have the greatest concentration, and that area still has relatively healthy stands I think. I was happy to see that work still goes on to save yet another forest species under threat from an invasive agent, though this will be scant comfort over the coming decade as ours rot in place. Or barricade our mountain roads.