View Single Post
  #4   Report Post  
Old 23-06-2008, 07:14 AM posted to rec.gardens
Billy[_4_] Billy[_4_] is offline
external usenet poster
 
First recorded activity by GardenBanter: Aug 2007
Posts: 2,265
Default Help! Hemlock Wooley Adelgid

In article ,
Jangchub wrote:

On Sun, 22 Jun 2008 21:18:56 -0400, "symplastless"
wrote:


"Jangchub" wrote in message
.. .
On Fri, 20 Jun 2008 11:27:47 -0700 (PDT), ctlady
wrote:

I was told that the telltale sign of the wooley adelgid were masses of
a "cottony" material in the branches. I have discovered some areas of
spittle. Is the spittle from a different bug or can that be the
wooley adelgid?

CW from Harwinton, CT

Since hemlocks are notorious for wooly adelgid,


No, notorious for decline and death when area in which they live is
disturbed. E.g., The tree is shallow rooted, making it prone to injury from
drought, sudden exposure after stand opening, and windthrow (481, 713).
Exposed to salt spray in a New England hurricane, it was one of the species
most severely damaged at two localities (1005, 1632).
Hemlocks of sawlog size are notoriously subject to wind-shake (481), to
radial stress cracks, and, following sudden exposure, to sunscald of the
bark, and to death. These reactions may be the result of many adverse
effects associated with a changed regime of solar heat and soil moisture and
culminate in a decline often referred to as post-logging decadence. When
hemlocks are left as residual trees following partial cutting, and when they
are exposed, through road or other construction or clearing, they often die,
even when their root area is covered with understory brush (661). Eastern
hemlock is also considered to be one of the species most sensitive to sulfur
fumes from smelters (1933). An interesting type of hemlock ring-shake
follows sapsucker injury (1292).



Reference: Hepting, George, H. July 1971 Disease of Forest and
Shade Trees of The United States US. Dept. Agric. Forest Service Handbook
Number 386 658 pages.



So as you can see, humans can have a great negative impact on the health of
a hemlock tree. Mucl more to the picture than WA.


Like I said, Hemlocks are prone to wooly adelgid infestation.
Infestation generally always follows stree and unhealthy trees. The
OP didn't ask for a course in Hemlocks. The question which was
answered was answered out of my own mind, not out of a book I worship.


You worship a book? Out of your mind??!
Please, leave some mystery.
--

Billy
Bush and Pelosi Behind Bars
http://www.youtube.com/watch?v=9KVTf...ef=patrick.net
http://www.youtube.com/watch?v=l0aEo...eature=related