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Re: [nafex] Ed, Ozzie, Joe, Tom please read Re: What is going on with this tree????



Hi All,
I've been reading a bit of what's going on regarding fire blight with great interest.  For the nine years that I have been growing fruit trees I have had very little incidence of fire blight.  The little fire blight that I had was in a few of my quince trees.  I haven't been very diligent about spraying my trees either, I might add.  As a matter of fact, one of my resolutions this year was to be more proactive/intelligent with my spraying.  I did my dormant oil and ferbam and continued with imidan (thank you Harvey Lisle) and manzate.  I, for the first time, also applied streptomycin with my imidan/manzate spray.  Perhaps I applied the streptomycin too late, perhaps this year was perfect for the growth of the fire blight bacteria or perhaps I was too lazy regarding orchard sanitation.  Either way, I have been walloped with a bad dose of fire blight on my seckel pears and a few apple trees.  I have cut out as much dead/diseased wood as possible and have sanitized both the wound/blade with rubbing alcohol.  The bacterium progresses.  At this point what should I do?  A local professional orchardist said to not spray anymore streptomycin as I would be wasting money.  He said to let the fire blight take it's course and prune it out this winter.  What is the recommended course of action?  Is it too late to apply streptomycin?  I appreciate any and all advice.  Regards, ken
----- Original Message -----
Sent: Thursday, June 21, 2001 6:26 AM
Subject: Re: [nafex] Ed, Ozzie, Joe, Tom please read Re: What is going on with this tree????



Yorrba wrote:

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> Ed,
>
> I understand your argument, but I've got to disagree with you.  I think your friend will agree that Tom Van der
> Zwet is also a well-respected fireblight expert (some would argue that he "wrote the book" on blight) and he
> and others have shown that pruning diligently as soon as blight symptoms appear can control blight even
> without strep sprays.  Also, as you know, Ed, summer pruning doesn't have the same level of growth
> stimulation as dormant season pruning.  Anyway, I'll agree that it is a hell of a way to control the disease.  But
> compared to losing the whole tree, it sometimes just might be worth it.

     My response-------

     My initial response to Kevin had to do with the practicality of his situation.  Or, in an urban situation he
cannot control common vectors like the various and many leafhopper species, stinkbug (esp.), Jap beetle, psylla, etc.
which are rampant in the humid, hot midwest during summer months.
     During the first epidemic I had here in 88, I consultated the various experts including Tom and was advised to
cut hell out of them.  And in so doing, lost many 5 year old trees of Gala/M9 interstem due to secondary infections.
     We walked the orchard at weekly intervals for a couple of months.
     Now I should also tell you that there are problems with Paul Steiner's predicting system, Maryblyt.  Or the
incidence of trauma blight caused by common hail storms which occur at night (or with rapid melting of hail, they are
unknown).  Mayblyt can't and doesn't include this incidence with any degree of accuracy.
     And lastly, you are indeed correct.  I think the incidence of various other blights such as psuedomonas are more
common in the east that most folks realize and are very often identified as fireblight.

Ed, So. Indiana Heaven (albiet cloaked at times!), etc

>
>
> Yorrba
>
> On Tue, 19 Jun 2001 19:17:58 -0400, Ed & Pat Fackler wrote:
>
> >Kev:
> >
> >     For reasons unknown, I can't view the photos you refer to.
> >
> >     However, if this tree is of bearing age, I'd not prune it at all.
> >Reason.  Additional pruning will stimulate new growth and given the potential
> >for subsequent FB infection which thrives on new growth, you are only asking
> >for additional damage.
> >     The late Paul Steiner (my good friend) of U-MD wrote the book on FB,
> >developed the predicting system known as Maryblyt, etc. and this is his
> >strong recommendation.  Or leave the damaged tissue until late winter, then
> >prune it out.
> >
> >ed
> >
> >fuwafuwausagi@usa.net wrote:
> >
> >> It was written:
> >>
> >> > Yep, that's blight.  Prune hard.  Take at least 15 cm below the
> >> visible symptoms and sterilize your shears with
> >> > 10% bleach (0.5% sodium hypochlorite) or 70% ethanol between cuts.
> >> It is a nasty disease.  Best of luck.
> >> >
> >> > What variety is this tree?
> >> >
> >> > Yorrba
> >>
> >> My reply:
> >>
> >> Would a few more of you guys view the photos and state your opinion
> >> please.   I'll let you know why I am so concerned after the consensus
> >> is in.
> >>
> >> Kevin
> >>
> >>
> >>
> >> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
> >
> >
> >
> >
> >Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
> >
> >
>
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