Irises forum→my botrytis journey -- (and struggle)

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Name: Timothy
eastern oregon (Zone 7b)
Irises Bulbs Region: United States of America Region: Pacific Northwest Plant and/or Seed Trader Dahlias
Garden Photography Salvias Cat Lover Enjoys or suffers hot summers Hybridizer Region: Oregon
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TBMan
Mar 21, 2018 9:33 PM CST
... it could be a rhizoctonia or a sclerotinia type of fungal rhizome decay. Botrytis convoluta mainly occurs during damp cool/cold, stagnant conditions with temps 50 degrees or lower. Those type of fall and winter conditions frequently occur during the winter season in the Columbia Basin of Washington and NE Oregon. Also, for some reason -- areas that were once extensive grassland seem more prone to Botrytis occurences.
Name: Arlyn
Whiteside County, Illinois (Zone 5a)
Irises Beekeeper Region: Illinois Celebrating Gardening: 2015
crowrita1
Mar 22, 2018 6:10 AM CST
I've been through the same struggles....with the same disease....., and I understand what you're going through Group hug .
Name: Evelyn
Sierra foothills, Northern CA (Zone 8a)
Garden Procrastinator Irises Bee Lover Butterflies Plant and/or Seed Trader Region: California
Cat Lover Deer Bulbs Foliage Fan Annuals Seed Starter
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evelyninthegarden
Mar 22, 2018 11:47 AM CST
It has been raining steady, quite heavily along with wind from time to time. As much as I would like to inspect the irises, it won't do any good, as I won't be able to treat then until the rains stop and we get some sunny days. Besides, I have a cold and severe eye infection. I am just going to hope for the best. Sticking tongue out
"Luck favors the prepared mind." - Thomas Jefferson
Northern CA (Zone 9a)
Region: California Cat Lover Irises Enjoys or suffers hot summers Dog Lover
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iciris
Mar 22, 2018 12:35 PM CST
Group hug Evelyn, get better quick, and take care of that eye!
• “Whoever said, ‘Do something right and you won’t have to do it again’ never weeded a garden.” – Anonymous
Sweden
Forum moderator Garden Photography Irises Bulbs Lilies Bee Lover
Hellebores Deer Celebrating Gardening: 2015 Photo Contest Winner: 2016
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William
Mar 22, 2018 2:14 PM CST
Yes, get better soon, Evelyn. Group hug

Name: Evelyn
Sierra foothills, Northern CA (Zone 8a)
Garden Procrastinator Irises Bee Lover Butterflies Plant and/or Seed Trader Region: California
Cat Lover Deer Bulbs Foliage Fan Annuals Seed Starter
Image
evelyninthegarden
Mar 23, 2018 12:26 AM CST
Barbara and William ~ I am doing the best that I can. Thank You! for your kind wishes. Blinking
"Luck favors the prepared mind." - Thomas Jefferson

Region: Australia Irises
Riversdale1
Mar 24, 2018 6:48 AM CST
Thumb of 2018-03-24/Riversdale1/ffd884
Thumb of 2018-03-24/Riversdale1/0ce711

Two broad spectrum fungicides we use . Are they available in the US or the equivalent in another brand ? The active ingredients is the key.
Name: Timothy
eastern oregon (Zone 7b)
Irises Bulbs Region: United States of America Region: Pacific Northwest Plant and/or Seed Trader Dahlias
Garden Photography Salvias Cat Lover Enjoys or suffers hot summers Hybridizer Region: Oregon
Image
TBMan
Mar 24, 2018 9:55 AM CST
yes, the active ingredients - Iprodione (AquaFlo) and Strobilurin (Scorpio) are available in the U.S But those two named products are not available in the U.S and aren't listed as being effective against botrytis convoluta, probably because the two active ingredients haven't been tested against this particular pathogen but because of their systemic action they'd be very much worth investigating.
I appreciate the head up, and will do more research on these two active ingredients
Name: Timothy
eastern oregon (Zone 7b)
Irises Bulbs Region: United States of America Region: Pacific Northwest Plant and/or Seed Trader Dahlias
Garden Photography Salvias Cat Lover Enjoys or suffers hot summers Hybridizer Region: Oregon
Image
TBMan
Mar 24, 2018 12:34 PM CST
I contacted the OSU (Oregon State University) Extension office and this link may be helpful to some of you -- (Brad?) It listed a new dual action fungicide that I haven't heard of before.
Pageant
https://pnwhandbooks.org/plant...

Region: Australia Irises
Riversdale1
Mar 24, 2018 5:38 PM CST
TBMan said:I contacted the OSU (Oregon State University) Extension office and this link may be helpful to some of you -- (Brad?) It listed a new dual action fungicide that I haven't heard of before.
Pageant
https://pnwhandbooks.org/plant...


This one should be really effective and worth trying. We have Boscalid over here which is also effective against mustard seed fungus. I was going it to use it as it's from a different chemical group and broad spectrum.
Name: Tom
Southern Wisconsin (Zone 5b)
Irises Vegetable Grower Butterflies Region: Wisconsin Keeps Horses Cat Lover
Dog Lover Keeper of Poultry Daylilies Celebrating Gardening: 2015
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tveguy3
Mar 25, 2018 4:27 AM CST
Pageant fungicide is available on Amazon for $139. per pound! Guess I won't be ordering any of that.
Voltaire: "Those who can make you believe absurdities, can make you commit atrocities,"
Twin Falls Idaho
onthegograha
Apr 17, 2018 9:53 AM CST
I saw your great post of preventing rot and you gave me a few idea's.
Thank you
Name: Lyndylu
Oregon's high desert (Zone 5b)
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LynnDel
Dec 22, 2019 2:38 PM CST
I have botrytis this year for the first time that I know of (may have had it before and didn't know what was going on), on irises I ordered this last summer. I was just out in the garden to inspect the iris bed after the snow finally melted away and saw the fuzzy gray mold on several of the fan bases. The entire crown pulled out easily. Now I'm going to go shopping for a fungicide, but I have no clue what to get.

Name: Tom
Southern Wisconsin (Zone 5b)
Irises Vegetable Grower Butterflies Region: Wisconsin Keeps Horses Cat Lover
Dog Lover Keeper of Poultry Daylilies Celebrating Gardening: 2015
Image
tveguy3
Dec 23, 2019 3:39 AM CST
Scoop out the soft tissue and apply a 10% bleach solution, or sprinkle a cleanser with bleach, like comet onto the affected area. I wouldn't recommend digging up the rhizome this time of the year. I've heard you can use garden lime on it too, but haven't tried that.
Voltaire: "Those who can make you believe absurdities, can make you commit atrocities,"

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