Irises forum: Diseases

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Name: Sherry Austin
Santa Cruz, CA (Zone 9a)
Region: California Irises Keeper of Poultry Roses Dragonflies Birds
Bulbs Foliage Fan Photo Contest Winner: 2015
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Henhouse
Mar 28, 2017 11:52 AM CST
Every day it's something new.... I was thinking it may be an extreme case of leaf spot, but it happened rather quickly.. ideas?
Thumb of 2017-03-28/Henhouse/0157a9

When counting, try not to mix chickens with blessings.
Name: Leslie
Durham, NC (Zone 8a)
Region: North Carolina Irises Cat Lover Garden Photography Enjoys or suffers hot summers Celebrating Gardening: 2015
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Lestv
Mar 28, 2017 12:48 PM CST
Where those iris in a lot of water? I would definitely cut the leaves off ASAP. I have had frost damage leave brown spotty leaves, but not that extensive.

Is there any fungal spores at the base of the leaves?
My road calls me, lures me west, east, south & north; most roads lead men homewards, my road leads me forth. - John Masefield
Name: Sherry Austin
Santa Cruz, CA (Zone 9a)
Region: California Irises Keeper of Poultry Roses Dragonflies Birds
Bulbs Foliage Fan Photo Contest Winner: 2015
Image
Henhouse
Mar 28, 2017 2:14 PM CST
I cut the leaves off.. I didn't notice spores on or around this iris... but found some spherical, poppy-seed-sized white ones in another.. Got a lot of rot problems in this bed.. This is an area that had been fallow for years.. It's on a slope, but the native soil holds water well... and we had a lot of water this year...
When counting, try not to mix chickens with blessings.
(Zone 9b)
Region: California
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UndertheSun
Mar 28, 2017 2:29 PM CST
I feel your pain Sherry! Group hug I wish the weather would stay at 50-60 while we dry out...not mid to high 70's.

I'd love to see photos of the spores you found elsewhere. I've never seen a leaf look like that. Blinking
Name: Sherry Austin
Santa Cruz, CA (Zone 9a)
Region: California Irises Keeper of Poultry Roses Dragonflies Birds
Bulbs Foliage Fan Photo Contest Winner: 2015
Image
Henhouse
Mar 28, 2017 3:00 PM CST
They looked like white poppy seeds in the soil.. I'll see if I can find that clump of dirt in the trash and take a picture. I'm hoping it's not mustard seed fungus (crown rot) in that bed too Glare I've only seen the "seeds" in the folds of the leaves in the past, but I'm told it lives in the soil. Sighing!
When counting, try not to mix chickens with blessings.
Name: Robin
Melbourne, Australia (Zone 10b)
Region: Australia Irises Garden Photography
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Totally_Amazing
Mar 28, 2017 4:33 PM CST
Group hug Sherry. That looks nasty.
Name: daphne
san diego county, ca (Zone 10a)
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shizen
Mar 28, 2017 5:39 PM CST
Sighing! Thumbs down hope it's not the 'mustard' thing.
Name: Elsa
Las Cruces, New Mexico (Zone 8a)
Region: New Mexico Region: United States of America Irises Region: Southwest Gardening Dog Lover
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GreenIris
Mar 28, 2017 9:12 PM CST
Never seen it either but one of my white blooms had a black something or other on it. Come to think of it. I should throw that bloom
Name: Arlyn
Whiteside County, Illinois (Zone 5a)
Irises Beekeeper Region: Illinois Celebrating Gardening: 2015
crowrita1
Mar 29, 2017 4:25 AM CST
If I were you, Sherry, I'd take a few of the leaves to my County Extension Agent, and have them tested . It *looks* like it's a fungal disease....and there are quite a few different types....but I'd try to get ahead of it, if possible.
Name: Leslie
Durham, NC (Zone 8a)
Region: North Carolina Irises Cat Lover Garden Photography Enjoys or suffers hot summers Celebrating Gardening: 2015
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Lestv
Mar 29, 2017 7:23 AM CST
Good advice Arlyn.

Sure hope it doesn't spread Sherry.
My road calls me, lures me west, east, south & north; most roads lead men homewards, my road leads me forth. - John Masefield
Name: Lilli
Copenhagen, Denmark, EU
Irises Roses Bulbs Hellebores Foliage Fan Cottage Gardener
Plant Lover: Loves 'em all! Seed Starter Winter Sowing Bee Lover Dog Lover Region: Europe
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IrisLilli
Mar 29, 2017 7:28 AM CST
it does look particularly nasty. Never seen anything like it.
You don't know if it will grow until you try!
Name: Sherry Austin
Santa Cruz, CA (Zone 9a)
Region: California Irises Keeper of Poultry Roses Dragonflies Birds
Bulbs Foliage Fan Photo Contest Winner: 2015
Image
Henhouse
Mar 29, 2017 9:21 PM CST
So, our county agent referred me to the UC IPM page on Iris diseases.. Unless it's strawberries, or blackberries, they're not much help.
When counting, try not to mix chickens with blessings.
Name: Leslie
Durham, NC (Zone 8a)
Region: North Carolina Irises Cat Lover Garden Photography Enjoys or suffers hot summers Celebrating Gardening: 2015
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Lestv
Mar 30, 2017 11:40 AM CST
Shame on them. What if it was contagious to some valuable crop like, oh, grapes perhaps?
My road calls me, lures me west, east, south & north; most roads lead men homewards, my road leads me forth. - John Masefield
Name: Bonnie Sojourner
Harris Brake Lake, Arkansas (Zone 7a)
Magnolia zone
Region: United States of America Region: Arkansas Master Gardener: Arkansas Irises Plant and/or Seed Trader Moon Gardener
Garden Ideas: Master Level Dragonflies Bulbs Garden Art Celebrating Gardening: 2015 Gardens in Buckets
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grannysgarden
Mar 30, 2017 2:55 PM CST
Sherry, go on a university web site, one that teaches hort., and email them. We have several good ones in AR that will help anyone with a plant/soil/garden question.
Who plants a seed beneath the sod and waits for growth believes in God. ~~Unknown
Name: Arlyn
Whiteside County, Illinois (Zone 5a)
Irises Beekeeper Region: Illinois Celebrating Gardening: 2015
crowrita1
Mar 31, 2017 7:53 AM CST
Henhouse said:So, our county agent referred me to the UC IPM page on Iris diseases.. Unless it's strawberries, or blackberries, they're not much help.


Have the lazy so-and-so send the University a sample !! That's his job ! Or, as Bonnie said, e-mail the university some pix, and find out how to send in your own sample....without a pathology report it's really impossible to tell one from another, for most of the fungal diseases. The One thing you could do is treat with a "broad spectrum" fungicide, and if it IS a fungal problem, that would "help", to a degree.....although it's best to use a product that's known to work the best for the particular one you have (that's pretty well true for bacterial problems, too). Of course, if it's a bacterial problem...or a viral disease....all the fungicide in the world won't help. That's why i think an "expert opinion", and plant pathology are so important.
Name: Bonnie Sojourner
Harris Brake Lake, Arkansas (Zone 7a)
Magnolia zone
Region: United States of America Region: Arkansas Master Gardener: Arkansas Irises Plant and/or Seed Trader Moon Gardener
Garden Ideas: Master Level Dragonflies Bulbs Garden Art Celebrating Gardening: 2015 Gardens in Buckets
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grannysgarden
Mar 31, 2017 8:13 AM CST
I agree, Arlyn, otherwise you are wasting time. That would be like a dr. treating a fever without knowing what is causing it. I encourage you, Sherry, to continue to seek answers despite people who do not do their job.
Who plants a seed beneath the sod and waits for growth believes in God. ~~Unknown

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