Butternut (Juglans cinerea) decline question.
pmdlandarch at xearthlink.net
Fri Jan 21 12:55:11 EST 2000
I'm dubious also. My source is Pirone, "Diseases and Pests of Ornamental
Plants", who I will acknowledge is much more informed on such matters than
myself. While painting "wounds" was once an overly touted cure-all that
(thankfully) has pretty much been refuted...categorically denying that wound
painting can have
any value whatsoever seems to be to be an over-reaction in the opposite
Research by, I believe it is Ed Gilman (University of Florida) and others
seems to indicate that fungicide wound painting for oak wilt might actually
have a beneficial effect. Pirione doesn't give his source for the butternut
recommendation, but it may be based upon something more substantial than
mere wishful thinking.
Mike the Tree Doctor wrote in message ...
>I respectfully disagree with the wisdom and efficacy of tracing out
>caused by Sirococcus canker..it won't buy you anything as far I understand.
>This is probably one of the only truly ANNUAL canker diseases we know of.
>Thus, digging out this years canker material will not help prevent the
>spread of that canker, nor the infection of other loci on the tree.
>I am similarly dubious about the usefulness of even 'fungicidal' wound
>paints. I'd like to see a study done that proves that there is a benefit.
>Mike the Tree Doctor
>Starbuck <pmdlandarch at xearthlink.net> wrote in message
>news:kbnh4.602$H4.24999 at newsread2.prod.itd.earthlink.net...
>> Some nut trees tend to bear heavily in alternate years anyway. They
>> year buildng up reserves for next year's crop.
>> Butternuts are relatively short lived trees, seldom exceeding 75 years at
>> the most. Canker dieback seems to be the most common ailment. It's
>> probably caused by a fungus. The cankered portions should be removed and
>> destroyed and (this is one of the few times such painting is recommended)
>> the wounds should be painted with a fungicidal paint.
>> Leaves that might also harbor fungus (brown leaf spot) and should be
>> and destroyed.
>> See "Diseases and Pests of Ornamental Plants" by Pirone for additional
>> shadowlight wrote in message ...
>> >In article <3883EC94.347D41F6 at daviesand.com>, karl at daviesand.com says...
>> >> Mike the Tree Doctor wrote:
>> >> > Folks:
>> >> >
>> >> > I am very concerned with the decline of Butternut (Juglans cinerea)
>> >> > England, and am seeking to educate myself. In the areas in which I
>> >> > these days (NY, CT, MA primarily) it is very seldom that I see
>> >> > due primarily to a paucity of reproduction-aged trees. On trees that
>> >> > extant, canker-disease symptoms are nearly ubiquitous.
>> >> >
>> >> > Any URLs or stories on what the state of the art in research and
>> >> > intervention might be??
>> >> You can order hard copies of some articles on butternut from the
>> >> Growers Association at http://www.icserv.com/nnga/btwalnut.htm. Most
>> >> articles are from NNGA annual reports. If you're near Cornell, Arnold
>> >> Arboretum, Carey Arboretum, or the CT Ag Experiment Station, they have
>> >> subscriptions to the annual reports. Most major university libraries
>> >> subscriptions too (not UMass, however).
>> >um, do any of these articles have information useful to owners of
>> >butternuts? i have 2, about 25-30 years old & was told they have canker
>> >when i bought the house. thay didn't produce this year, but neither did
>> >any of the other nut trees (black walnut & carpathian walnut. there were
>> >a very few shagbark hickory nuts). i'm very fond of butternuts & i'd
>> >to save the trees if possible
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