| predators associated with the hemlock woolly adelgid (hemiptera: adelgidae) in the pacific northwest. | the hemlock woolly adelgid, adelges tsugae annand (hemiptera: adelgidae), is causing widespread mortality of eastern hemlock, tsuga canadensis l. carrière, in the eastern united states. in western north america, feeding by a. tsugae results in negligible damage to western hemlock, tsuga heterophylla (raf.) sargent. host tolerance and presence of endemic predators may be contributing to the relatively low levels of injury to t. heterophylla caused by a. tsugae. field surveys of the predator commu ... | 2008 | 18419922 |