Silver Fly on Hemlock Branch Infested with Hemlock Woolly Adelgid (IMAGE)
Caption
Like tufts of cotton on each branch, the egg sacks of an invasive pest, hemlock woolly adelgid, mean death for this eastern hemlock in Tennessee -- unless a West Coast fly can come to the rescue. A team of scientists from the University of Vermont, Oregon State University, and the US Forest Service have released adelgid-eating flies from the Pacific Northwest in two spots on the East Coast. If their experiment succeeds, this fly could save the hemlock from the fate of the now-vanquished chestnut and elm.
Credit
Bud Mayfield, USFS
Usage Restrictions
with coverage of associated story
License
Licensed content