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nafex - Re: [NAFEX] Apple Scab

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  • From: "Mark Dorogi" <>
  • To: "'North American Fruit Explorers'" <>
  • Subject: Re: [NAFEX] Apple Scab
  • Date: Fri, 30 May 2008 21:18:09 -0400

Yeah, I’m up to 400 bags in my Cox’s Orange Pippen…9 other trees to go… J


I have an Ashmead’s Kernel.  It always sets heavily and early too.  I don’t know if it’s genetically prone, but mine is certainly more prone to maladies than any other tree I have, not just scab, but for some reason even the PC and codling moth seem to like it the most.   It’s been hard to get apples to mature on that one.  A counter example is my Kerry Pippen – I’ve never seen scab on that one, even though it’s practically underneath a motley wild crabapple.  The bugs don’t even bother it that much.


The last two years I’ve resorted to using Captan to keep the trees in good shape until I can get the bags on.  Typically I do one spray around pink (captan + malathion), captan again during bloom, and once after petal fall (again with malathion).   I seem to get very good control of scab; last year the leaves were nice and robust all year, as opposed to prior years where there was scab all over.


It’s taking me so long to bag this year, I threw on another malathion spray the other day.  So far so good, still no major PC damage.




SE Michigan







From: [] On Behalf Of Doreen Howard
Sent: Friday, May 30, 2008 5:32 PM
To: North American Fruit Explorers
Subject: [NAFEX] Apple Scab


I've spent the last few days bagging apples and Asian pears.  Have gone through 500 bags, and I'm only half finished.  These trees are all on Bud 9 and under nine feet, but the fruit set this year has been heavy.


I have two russet apples, Ashmead's Kernel and Pitsmaston Pineapple.  The other six apple trees are either disease-resistant like Pixie Crunch or antique varieties with smooth skins.  I've noticed that both of the russets are very prone to apple scab, yet the other trees aren't.  Last season, the russets had major leaf damage from the scab and the few apples I didn't bag were riddled with scab.  As I bagged today, I'm already seeing signs of apple scab on the russet tree leaves.  None on the other apple trees, though.


Are russets genetically prone to the disease or is this coincidence?  BTW, after spending 15 years as a newspaper reporter and editor, I've learned that nothing is ever a coincidence.

Doreen Howard

IL-WI Border, Zone 4b

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