Comments on: Hemlocks destined to be Dinosaurs http://landscapedesignweb.com/2007/12/15/hemlocks-destined-to-be-dinosaurs/ Horticultural Design, Inc., Duncan Brine and the Brine Garden Wed, 02 Jun 2010 23:25:53 +0000 http://wordpress.org/?v=2.9.2 hourly 1 By: Patrick Horan http://landscapedesignweb.com/2007/12/15/hemlocks-destined-to-be-dinosaurs/comment-page-1/#comment-56 Patrick Horan Sun, 13 Jan 2008 19:18:54 +0000 http://landscapedesignweb.com/2007/12/15/hemlocks-destined-to-be-dinosaurs/#comment-56 This is a sad story about the fate of "specimen" hemlocks in the Southern Appalachians with a lot of good historical information about the hemlock woolly adelgid (HWA) infestation in the eastern US. It is also a very misleading propaganda piece for the chemical industry, suggesting that biological control of HWA is ineffective. In fact I have found the HWA predator beetle Sasajiscymnus tsugae to be very effective for HWA control in both wild and neighborhood applications, so long as there are enough hemlocks to support a beetle population. This is a sad story about the fate of “specimen” hemlocks in the Southern Appalachians with a lot of good historical information about the hemlock woolly adelgid (HWA) infestation in the eastern US.

It is also a very misleading propaganda piece for the chemical industry, suggesting that biological control of HWA is ineffective. In fact I have found the HWA predator beetle Sasajiscymnus tsugae to be very effective for HWA control in both wild and neighborhood applications, so long as there are enough hemlocks to support a beetle population.

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