On Tue, 23 May 2006 20:16:09 -0400, Klebba wrote:

I've got 12 hemlock trees infested with woolly adelgids. The local
garden store recommended Bayer Tree & Shrub insecticide and recommended
that I drench them. After measuring the circumference of the trees, also
as they suggested, it looks like mixing one ounce of the insecticide per
inch of circumference for all those trees in a 2-gallon watering can means
that I'll need 6 gallons of this stuff @ $90 per gallon!

My question: is drenching really necessary or can I just use the alternate
method of spraying them at a much lower concentration and expect decent
results? I thought I might drench the ones that are too tall to reach
with the sprayer and just spray the ones I can reach.

John,
Maryland


Good day Jonh. Sorry to hear that you got the woolly adelgid. These are
rather difficult to get rid of. Before you go and purchase a bunch of
chemicals and the like, contact you local agriculture extension office.
There is a process that needs to be followed to kill them off and the kill
window has passed for you for now. Once the adelgid has the waxy fluff,
they are next to impossible to kill effectively.

maryland agriculture extension
http://extension.umd.edu/

Some information on hemlock woolly adelgids.
http://www.ces.ncsu.edu/depts/ent/no...9/note119.html

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