New and Unread Tree-Mails
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 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         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!            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.countrylivingandgar... Lux Umbra Dei Freedom is a gift from God! -Not government! |
Name: Tom Southern Wisconsin (Zone 5b)       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 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 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)       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 irisarian Jul 2, 2012 1:42 PM CST |
| ouch tough to get rid of. |
Name: Mary Ann Kentucky       Muddymitts Jul 2, 2012 2:02 PM CST |
| Caused by what, Caitlin? Thoughts become things -- choose the good ones. (www.tut.com) |
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 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.  Thoughts become things -- choose the good ones. (www.tut.com) |
Name: Polly Kinsman Hannibal, NY (Zone 6a)     PollyK Jul 5, 2012 10:03 AM CST |
| It's my understanding scorch is a disease. Lucy? |
Name: Lucy Hamilton, MA (Zone 6b) irises 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      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 Muddymitts Jul 31, 2012 7:22 AM CST |
Yikes. I'm so sorry.  Thoughts become things -- choose the good ones. (www.tut.com) |
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