Re: Canadian hemlocks
- To: s*@MAELSTROM.STJOHNS.EDU
- Subject: Re: [SG] Canadian hemlocks
- From: N* S*
- Date: Sat, 19 Aug 2000 08:07:09 -0400
Thanks so much for the help from everyone.
Nancy
>What a shame, Nancy. I've had woolly adelgids on my hemlocks and
>gotten rid of them with hort. oil spray. Have to keep it up, tho'
>as they tend to return. With a tree that large, your Mom will
>probably need to hire a service to spray it, since you have to hit
>the little beggers to do much good. And, they need to be controlled
>or they _will_ kill that tree. Fertilizer will not help the tree
>and, as someone else pointed out, this is totally the wrong time of
>year to fertilize a tree. High nitrogen would only encourage new
>growth which would not harden off and would be winter killed, adding
>to the tree's stress.
>
>There's a fair amount of info. on these pests on the web - here are
>only a few of the sites devoted to it:
>
>http://www.ext.vt.edu/departments/entomology/factsheets/hewoadel.html
>(tells what concentration of hort. oil is needed for which months of
>year)
>
>http://www.state.ct.us/caes/FactSheetFiles/Entomology/fsen012f.htm
>(which also points out that fertilizer is NOT what one should do for
>a tree under adelgid attack!)
>
>
>http://www.forestworld.com/forestry/outreach/pestalerts/hem_w_adelgid/
>hemlock.html
>(has pix of egg masses and damage done)
>
>http://www.kevintree.com/hemlock.htm
>(points out that " Control of 95-100% is common with the following
>pesticides: horticultural oil, insecticidal soap, malathion or
>diazinon")
>
>Best of luck to your Mom on saving that tree.
>
>Marge Talt, zone 7 Maryland
>mtalt@clark.net
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>Hemlock Woolly ----------
>> From: Nancy Stedman <stedman@RCN.COM>
>> Date: Friday, August 18, 2000 10:40 AM
>>
>> I just spent a few days working on my mother's garden in Cape Cod,
>a fairly
>> mild climate even though it is north. My mother has a once-gorgeous
>Canadian
>> hemlock with at least a two-foot wide trunk. The tree has been
>attacked by
>> woolly algelid (not sure I'm spelling that right). My mother wants
>to "help"
>> the tree by fertilizing it with Scott's evergreen fertilizer, which
>has a
>> nitrogen ratio of about 33. I tried to convince her that she'd be
>making a
>> mistake, but to no avail. Can anyone come up with some compelling
>reasoning?
>>
>> Her garden, by the way, has gotten out of control and is a good
>argument in
>> favor of *not* planting ajuga unless you are a vigilant sort of
>gardener.
>> The ajuga develops holes, giving a foothold to weeds, and then runs
>into the
>> lawn, where it is difficult to pull out without also removing turf.
>>
>> Nancy S.
>
