Butternut (Juglans cinerea) decline question.
Mike the Tree Doctor
mlamana at bestweb.net
Thu Jan 20 17:46:47 EST 2000
I respectfully disagree with the wisdom and efficacy of tracing out cankers
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 spend
> 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 raked
> 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 like
> >to save the trees if possible
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