Old 04-05-2003, 07:04 PM
scott185 scott185 is offline
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Join Date: Feb 2001
Location: Hopewell Jct , NY 12533
Posts: 19
wolly adelged

Does any one have a spray program for wooly adelged in hemlocks. Also how should I charge for spraying 40-50 ft trees.

I am thinking of using permitherin and hort oil twice per season.

Thank you in advance
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Old 04-05-2003, 07:34 PM
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TSM TSM is offline
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Join Date: Feb 2003
Location: MA
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we treat hemlock adelgid a couple of different ways-

early spring (now) hort oil
early fall hort soap with oil

now that is for wide open properties where drift is not a concern, other wise soil injection of merit once (bit more costly for customer, great control and no worries of drift)
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Old 04-05-2003, 08:06 PM
KenH KenH is offline
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Location: CT
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We now inject all our hemlocks. Works incredible, 12 month protection.
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Old 04-05-2003, 10:34 PM
fblandscape fblandscape is offline
Join Date: Dec 2002
Location: north east
Posts: 776
I would simply say to monitor your hemlocks. At first sign of any adelgid presence, blast them all with hort oil or insect soaps. Use Merit only if you are in highly populated areas. How big of a sprayer do you plan on using for this? I know people who use 1500 gallon spray rigs JUST for wolly adelgid.
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Old 04-06-2003, 12:58 AM
Enviro Green Enviro Green is offline
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Join Date: Apr 2003
Location: Southside Virginia
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It seems the best way to treat adelgid without using excess insecticies would be to get a handle on the number and then use a drench which would be taken up be the hemlock and offer protection. All unprotected hemlocks in our area will be gone in 10 years due to adelgid and then you can give up merit apps if you want. This is more appealing to homeowners than sparying a blanket. Where are you at?

This is Virginia Tech Forestry info.


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