Return to the Garden Clinic Forum | Post a Follow-Up

 o
'Fungal' blight on Aristocrat ornamental pear.

Posted by yiorges-z5il (My Page) on
Fri, Jun 15, 12 at 16:32

I am very familar with "fire-blight" in pears BUT this is different. no "sheepards crook" no dark brown/black branch tips & reddis brown under the bark...
The tips are a lighter color & the leaves are brown. not responsive to a anti-biotic treatment....but stops further infection with a systemic fungicide.
The problem first came to my attention last summer (2011) & is very common this year.....any suggestions


Follow-Up Postings:

 o
RE: 'Fungal' blight on Aristocrat ornamental pear.

get rid of the tree???

its ornamental.. why are you poisoning mother earth over it???

of the millions of ornamental trees.. BETTER THAN flowering pear.. you cant find a single thing to fill the spot???

crimminey ...

ken


 o
RE: 'Fungal' blight on Aristocrat ornamental pear.

If you didn't think it was fire blight, why did you treat it with an antibiotic? I'm really curious as to what anitbiotic you were able to obtain for treatment, and how you were able to figure out a dosage. The stuff sold to orchardists would treat acres. I think I know what you are talking about, though. I have seen it mildly on some fruit trees this year and frankly as the season progressed they grew out of it. I blamed it on some extraordinarily freaky weather this spring. I had the same run of fruit trees on a bench in the greenhouse I had not set out yet, and they were symptomless, but then again, I have controlled temps in there.


 o
RE: 'Fungal' blight on Aristocrat ornamental pear.

Calliope 6: The antibiotic is oxytetracycline. There is a company that has been around for at least 20 years that prepares this & other products in measured doses. Then its "injected" just below the bark (into the cambian) & then goes through out the tree.
I tried the antibiotic first & it didnot work so went to a fungicide.
Yes our weather has been strange this year We have field grown ornamental pear for 20+ years & the city recommends them & other species for street plantings this is the first problem we have noted.


 o
RE: 'Fungal' blight on Aristocrat ornamental pear.

I am really happy to see that a company will do the measured 'smaller' dose. Needs to be done more often and would save a lot of mis-use for the less common treatments but still makes them available on a smaller scale.

It does bother me that a city recommends this tree for mass plantings. A nearby town did this once not so long ago, and I don't think there is one of them left standing. They also installed some trees with the potential of becoming massive into some fancy ornamental grates, and extremely near to buildings. Looked super for awhile, but the eventual and inevitable 'un-installation' is a major hidden cost.

If you are field growing ornamentals, then it would be worth the cost and effort to send off some samples to a diagnostic lab for pathogen confirmation. It's getting harder and more cost prohibitive than it used to be in our state, due to budget cut-backs, but it may save you some time and $. Like said, however, I did see this a bit in my very young plantings this year, but sat on it before any applications of anything and the issue resolved spontaneously.


 o Post a Follow-Up

Please Note: Only registered members are able to post messages to this forum.

    If you are a member, please log in.

    If you aren't yet a member, join now!


Return to the Garden Clinic Forum

Information about Posting

  • You must be logged in to post a message. Once you are logged in, a posting window will appear at the bottom of the messages. If you are not a member, please register for an account.
  • Please review our Rules of Play before posting.
  • Posting is a two-step process. Once you have composed your message, you will be taken to the preview page. You will then have a chance to review your post, make changes and upload photos.
  • After posting your message, you may need to refresh the forum page in order to see it.
  • Before posting copyrighted material, please read about Copyright and Fair Use.
  • We have a strict no-advertising policy!
  • If you would like to practice posting or uploading photos, please visit our Test forum.
  • If you need assistance, please Contact Us and we will be happy to help.


Learn more about in-text links on this page here