pests on Hemlock trees
 

Has anyone had any problem with Wooley Adelgids on their Hemlock trees? They
appear as white, "wooley" covering on the branches and needles of the tree.
They may be in the aphid family. My Hemlocks have this and many branches
are dying- I'm very upset, since I've had these trees for a long time and
never had any problems with them. I recently had them sprayed with a dormant
oil spray, but haven't seen any improvement yet. Can anyone who has had
these or has any experience/ knowledge please share with me. Thanks so much.
Sis

Socrates, I seem to recall, had the opposite problem

"Sis" wrote in message
...
Has anyone had any problem with Wooley Adelgids on their Hemlock trees?
They appear as white, "wooley" covering on the branches and needles of the
tree. They may be in the aphid family. My Hemlocks have this and many
branches are dying- I'm very upset, since I've had these trees for a long
time and never had any problems with them. I recently had them sprayed
with a dormant oil spray, but haven't seen any improvement yet. Can anyone
who has had these or has any experience/ knowledge please share with me.
Thanks so much. Sis

"Sis" wrote in :

Has anyone had any problem with Wooley Adelgids on their Hemlock
trees? They appear as white, "wooley" covering on the branches and
needles of the tree. They may be in the aphid family. My Hemlocks
have this and many branches are dying- I'm very upset, since I've had
these trees for a long time and never had any problems with them. I
recently had them sprayed with a dormant oil spray, but haven't seen
any improvement yet. Can anyone who has had these or has any
experience/ knowledge please share with me. Thanks so much. Sis



Yes sis, wooly adelgid is a huge problem these days-- natural stands of
Hemlock are being decimated along with landscape trees.

If your tree is small enough, blasting it with a strong jet of water from
top to bottom is a good way to start, hitting especially the strongly
affected areas.

I use Sunspray Horticultural Oil and apply routinely every 7 days for at
least 3 cycles, followed by monthly spraying or if an outbreak is spotted.
Don't apply Sunspray if very hot conditions are expected (above 88°F.) or
frosts.

It's not practical to spray huge stands of trees or very large individual
trees, although if your jet of water reaches I'd say go for it. Followup by
making sure the tree has ample moisture and hope for the best.

--
David J. Bockman, Fairfax, VA (USDA Hardiness Zone 7)
email:
http://beyondgardening.com/Albums

You may need to apply a systemic pesticide.
Imidacloprid "Merit" has been approved for hemlock wooley adelgid in CT
Try googling with the words "Merit adelgid" together and you will get
decent results.

wrote in message
ups.com...
You may need to apply a systemic pesticide.
Imidacloprid "Merit" has been approved for hemlock wooley adelgid in CT
Try googling with the words "Merit adelgid" together and you will get
decent results.
Thanks so much. I'm going to research that now. Sis

"David Bockman" wrote in message
9.11...
"Sis" wrote in :

Has anyone had any problem with Wooley Adelgids on their Hemlock
trees? They appear as white, "wooley" covering on the branches and
needles of the tree. They may be in the aphid family. My Hemlocks
have this and many branches are dying- I'm very upset, since I've had
these trees for a long time and never had any problems with them. I
recently had them sprayed with a dormant oil spray, but haven't seen
any improvement yet. Can anyone who has had these or has any
experience/ knowledge please share with me. Thanks so much. Sis

Yes sis, wooly adelgid is a huge problem these days-- natural stands of
Hemlock are being decimated along with landscape trees.
If your tree is small enough, blasting it with a strong jet of water from
top to bottom is a good way to start, hitting especially the strongly
affected areas.
I use Sunspray Horticultural Oil and apply routinely every 7 days for at
least 3 cycles, followed by monthly spraying or if an outbreak is spotted.
Don't apply Sunspray if very hot conditions are expected (above 88°F.) or
frosts.
It's not practical to spray huge stands of trees or very large individual
trees, although if your jet of water reaches I'd say go for it. Followup
by
making sure the tree has ample moisture and hope for the best.
David J. Bockman, Fairfax, VA (USDA Hardiness Zone 7)
email:
http://beyondgardening.com/Albums

Thanks so much, David. Since my trees are so tall, I had them professionally
sprayed once this year, but I don't see any improvement yet. They sprayed
during really hot weather- I hope they didn't cause further damage to my
trees. I think I'll buy my own spray soon and try that, using to your
advice, Thanks again. Sis

"Sis" wrote in
:


Thanks so much, David. Since my trees are so tall, I had them
professionally sprayed once this year, but I don't see any improvement
yet. They sprayed during really hot weather- I hope they didn't cause
further damage to my trees. I think I'll buy my own spray soon and try
that, using to your advice, Thanks again. Sis




Hi again Sis,

Spraying with oil will indeed have an effect, however you have to think in
terms of multiple applications to smother the succeeding hatchings of
adelgids.

--
David J. Bockman, Fairfax, VA (USDA Hardiness Zone 7)
email:
http://beyondgardening.com/Albums