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joe_il

late fire blight strike

16 years ago

Kinda thought fireblight was an early spring event? (bloom) A few weeks ago a few limbs on my 2nd leaf honeycrisp on g11 were wilting like they needed water but the rest of the tree was fine. I was going to post something but it went away. Now I went out today to find about 4 limbs smoked. We have had heavy rain and warm temps. I fertilized in late April. Tree never bloomed, its always had a "wilty" droopy appearance (leaves) Is this typical? Do you have to keep cover spraying with strep from prebloom to now?

I cut the afflicted limbs off , left an ugly stub. Any thing else I need to do?

So I guess its strep and copper next year. Didnt use anything this year. I have a Johnathan on g30 right next to the hcrisp that is going like made it bloomed pretty good this year I cut them off of course as its in its 2nd leaf. Hope that doesnt get it.

Joe-il

Comments (12)

  • 16 years ago

    Hi Joe-
    Just to confirm, when you say "smoked", you mean it has a black charred appearance?

    The reason why I ask is, last year, I thought I had gotten a very late fire blight strike. But, it turned out to be just a shepherd's hook wilting of the central leader (and other branches) caused by high humidity. I could see them hook downwards in the morning, and stand back up again at night! I did wind up getting a couple strikes of FB at a different point (earlier) last year though, even with my Kocide 3000 dormant spray.

    This year, I've started spraying Agristrep, but I've only done that once. I'm not sure really when the danger of FB has passed... Can someone tell me?

    Thanks,
    -Glenn

  • 16 years ago

    glen- they were side branches,leaves were brown- reddish brown and crispy.

  • 16 years ago

    I had a developing case of fireblight on my crabapple I planted this spring. I just ripped it out. The last straw was when the aphids were at the tips of all the branches. I said, enough of this, let's move on.

    The dwarf plum now lives there. We shall see.

  • 16 years ago

    Fireblight is worst at bloom time but it can hang on all summer. I have been having lots of minor strikes all summer long. My quince in particular is getting nailed. It also has major problems with codling moth and now quince rust so I am thinking of just pulling it out.

    Scott

  • 16 years ago

    Quince is a fire blight magnet that I've seen bring FB to other trees in orchards.

    I too am having continued strikes this year for the first time, minor but somewhat alarming. I will not apply strep next year as FB has yet to prove an existential issue in any orchards I manage. Doesn't tend to show up in sequential years when left untreated.

    It's funny how on most sites pears have been completely unaffected this year and it's the apples that are being burned.

  • 16 years ago

    Thats exactly what I think my quince may be doing; the apple FB is clustered in the part of the orchard closest to the quince. The pears are pretty far away and they don't get any blight at all, ever. Some quince fruits were getting infected that I wasn't noticing and that may be where the bacteria were hanging out. I have gotten very diligent recently on picking off any misshapen or small or darkened fruits on the quince. Before I applied strep I was getting it a lot worse and for an even longer period.

    Scott

  • 16 years ago

    So.. if we have fireblight in the summer (which I do on both pears and apples) what is the best thing to do to save the tree?

    And then what exactly should we do in the winter to prevent it?

    I've cut off many branches already (while sterilizing my snippers between cuts) but new areas show up (or were there in early stages which I did not see). Poor things are looking pretty sad and I'm seriously thinking of taking out all my pears and apples (only 2 of each) and using that ground for something that actually produces food. We don't really need more fruit anyways. More herbs and greens maybe.

    Thanks, Ron

  • 16 years ago

    Why don't you plant some fireblight resistant varieties. There are plenty of them out there. Here's a list of pears and apples that show some resistance:

    Apples:
    Arkansas Black
    Britemac
    Carroll
    Delicious
    Early McIntosh
    Empire
    Jamba
    Liberty
    Melba
    Northwestern Greening
    Priscilla
    Stark Bounty
    Stark Splendor
    Turley
    Viking
    Wellington


    Pears:
    AC Harrow Crisp
    AC Harrow Gold
    Harrow Delight
    Harrow Sweet
    Harvest Queen
    Kieffer
    Magness
    Maxine
    Moonglow
    Old Home
    Starking Delicious
    Warren
    Ledbetter
    Chojuro
    Kikusui
    Kosui
    Seuri
    Shinko
    Shinsui
    Singo
    Tsu Li
    Ya Li

  • 16 years ago

    Honey crisp has some resistance to FB, but I still got it. Funny it got it but the jonathan didnt...(knock on wood)

    Liberty is the only one on the apple list I would be interested in growing and that has moderate resistance to fb.

  • 16 years ago

    I haven't found Honeycrisp at all resistant here.

  • 16 years ago

    Well me neither hman lol. I did find this on the U MN site

    Fire Blight: depends on age, rootstock and disease pressure.

    Vigorous young trees on susceptible rootstock (M9, M26) may show serious infection in severe fire blight years. Older trees under normal conditions show moderate to good resistance.

    Here is a link that might be useful: U.M.N Apples

  • 16 years ago

    Joe-il, I have gotten lots of strikes on Honeycrisp where other varieties haven't been affected at several sites so I don't need to read other research. These were not trees on dwarfing root stock. I flat out don't believe the research, and you'd probably believe your eyes more than their research too. I don't expect you to believe my eyes, however.

    Is there a more obnoxious internet expression than LOL?