Irises forum: Brown leaf in middle of fan

Page 1 of 4 • 1 2 3 4
Views: 2962, Replies: 60 » Jump to the end

caitlinsgarden
Jun 14, 2012 4:09 PM CST
Outside leaves turning brown are natural, but I have noticed some fans that have the middle inside leaf that is brown; either a dry brown, or a wet rotty brown.
Is this something unusual, or have you noticed this also? Any idea what causes this?
Name: Lucy
Hamilton, MA (Zone 6b)
irises
Charter ATP Member Cottage Gardener Enjoys or suffers cold winters Region: United Kingdom Region: Northeast US Irises
Region: United States of America
Image
irisarian
Jun 14, 2012 9:01 PM CST
Do you have borers? They turn leaves wet & you have to get them out. If not, try thrip. I am encouraging am I not?

caitlinsgarden
Jun 15, 2012 5:26 AM CST
What do thrip do?
Name: Leon
Indiana (Zone 5a)
Light is the shadow of God!
Charter ATP Member I was one of the first 300 contributors to the plant database! Celebrating Gardening: 2015 Region: United States of America Region: Indiana Vegetable Grower
Garden Ideas: Master Level Native Plants and Wildflowers Peonies Hummingbirder Dog Lover Lilies
Image
TBGDN
Jun 15, 2012 5:59 AM CST
This information is from my own iris pest experiences. Scroll down about 2/3 to see my input on borers. HTH: http://www.countrylivingandgardens.com/garden-enemies.html

Thumb of 2012-06-15/TBGDN/bcddd8
Lux Umbra Dei
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
Jun 15, 2012 7:14 AM CST
What a wonderful resource Leon! Thanks for posting it.
I am not afraid of an army of lions led by a sheep; I am afraid of an army of sheep led by a lion. - Alexander the Great
Name: Lucy
Hamilton, MA (Zone 6b)
irises
Charter ATP Member Cottage Gardener Enjoys or suffers cold winters Region: United Kingdom Region: Northeast US Irises
Region: United States of America
Image
irisarian
Jun 15, 2012 8:54 AM CST
Thrips eat & weaken the leaves. We only had them one time, but they sure make the plant look messy. Someone else gave us the ID.

caitlinsgarden
Jun 15, 2012 2:51 PM CST
Very good info Leon, thanks! I have had a lot of borer experience, and I think this is something different.
Name: Lucy
Hamilton, MA (Zone 6b)
irises
Charter ATP Member Cottage Gardener Enjoys or suffers cold winters Region: United Kingdom Region: Northeast US Irises
Region: United States of America
Image
irisarian
Jun 15, 2012 3:09 PM CST

we used a product called 'dysyston' which got rid of the thrip. It is systemic. Also worked on leaf minor.
Name: Vi
Ocean Springs, MS (Zone 8b)
Irises Dog Lover Lover of wildlife (Black bear badge) Region: United Kingdom Region: United States of America Region: Mississippi
Charter ATP Member Daylilies Tip Photographer I was one of the first 300 contributors to the plant database! I sent a postcard to Randy! Garden Ideas: Level 2
Image
stetchworth
Jun 16, 2012 4:57 AM CST
Love your website, great information and I love the photos of your Iris, beautiful.

caitlinsgarden
Jun 27, 2012 1:06 PM CST
Well, I dug up some and looked for borers, but there aren't any. It may just be drought; I haven't been watering irises until just now. The rhizome I dug was looking kinda shriveled and the roots looked dead, although there were a few new whit ones starting. Is this how the roots look when they are ready to be divided? Or did I just make a save on this one....(I hope)

caitlinsgarden
Jul 2, 2012 12:45 PM CST
I just reread a brochure about growing irises from the AIS, and it has a picture that is very similar to the yellowing and browning inner fan laves I have been seeing. They call it "scorch".
Name: Lucy
Hamilton, MA (Zone 6b)
irises
Charter ATP Member Cottage Gardener Enjoys or suffers cold winters Region: United Kingdom Region: Northeast US Irises
Region: United States of America
Image
irisarian
Jul 2, 2012 1:42 PM CST
ouch tough to get rid of.
Name: Mary Ann
Kentucky
I was one of the first 300 contributors to the plant database! Region: United States of America Hostas Hummingbirder Daylilies Birds
Irises Keeps Horses Region: Kentucky Farmer Container Gardener Celebrating Gardening: 2015
Image
Muddymitts
Jul 2, 2012 2:02 PM CST
Caused by what, Caitlin?
Thoughts become things -- choose the good ones. ([url=www.tut.com]www.tut.com[/url])

caitlinsgarden
Jul 3, 2012 5:36 AM CST
It said maybe early heat followed by frost, which is what we had this year for sure.
Name: Mary Ann
Kentucky
I was one of the first 300 contributors to the plant database! Region: United States of America Hostas Hummingbirder Daylilies Birds
Irises Keeps Horses Region: Kentucky Farmer Container Gardener Celebrating Gardening: 2015
Image
Muddymitts
Jul 3, 2012 6:37 AM CST
Ah. Well -- if your rhizomes are producing new white roots, then they're not dead -- just *resetting* themselves for future growth. It has been a wierd-weather year for sure -- no surprise that we're seeing wierd plant problems. Sad
Thoughts become things -- choose the good ones. ([url=www.tut.com]www.tut.com[/url])
Name: Polly Kinsman
Hannibal, NY (Zone 6a)

Charter ATP Member Region: United States of America I helped plan and beta test the plant database. I was one of the first 300 contributors to the plant database! Irises Lilies
Seller of Garden Stuff
Image
PollyK
Jul 5, 2012 10:03 AM CST
It's my understanding scorch is a disease. Lucy?
Name: Lucy
Hamilton, MA (Zone 6b)
irises
Charter ATP Member Cottage Gardener Enjoys or suffers cold winters Region: United Kingdom Region: Northeast US Irises
Region: United States of America
Image
irisarian
Jul 6, 2012 9:26 AM CST
yes The only treatment I have heard is to dig it up & let sit in the sun for a day or so. We haven't had it here.
Name: Betty
Bakersfield, CA
Charter ATP Member I was one of the first 300 contributors to the plant database! Birds The WITWIT Badge Region: United States of America Roses
Irises Cat Lover Daylilies Region: California Garden Ideas: Level 1
Image
Betja
Jul 17, 2012 11:24 AM CST
I seem to remember that the main reason Paul Black left Oklahoma was a wicked case of scorch, where he lost almost all of his stock, and that he later said that if it is true scorch you should probably just get rid of the rhizome(s). Does anyone else remember that?

I thought I had it the first year I potted up a bunch of iris and put them out in the sun and watered them in the middle of the day (what a fool I was!), but I think it was just stress on the plants plus the beginnings of bacterial soft rot. I learned later that that was the worst thing I could have done, because in our 100+ summer temps and watering them in the sunlight they are really susceptible to soft rot. Heat and moisture, plus too much nitrogen, really encourage soft rot. But I had many where the center leaf turned brown and that's why I thought it was scorch. After I lost a couple and did some reading we created a plywood table on sawhorses and I put the pots under a shade tree -- and I've had great luck ever since!

Betty

caitlinsgarden
Jul 31, 2012 6:10 AM CST
I am moving all the irises that still look unhealthy to another bed. I noticed black mold like streaks on some of the brown foliage...
Name: Mary Ann
Kentucky
I was one of the first 300 contributors to the plant database! Region: United States of America Hostas Hummingbirder Daylilies Birds
Irises Keeps Horses Region: Kentucky Farmer Container Gardener Celebrating Gardening: 2015
Image
Muddymitts
Jul 31, 2012 7:22 AM CST
Yikes. I'm so sorry. Crying
Thoughts become things -- choose the good ones. ([url=www.tut.com]www.tut.com[/url])

Page 1 of 4 • 1 2 3 4

« Garden.org Homepage
« Back to the top
« Forums List
« Irises forum
You must first create a username and login before you can reply to this thread.

Today's site banner is by Paul2032 and is called "Chrysanthemum"