Irises forum: iris Borer

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Name: Lynnette
Northwest Illinois (Zone 5a)
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ljb5966
Jun 9, 2015 12:16 PM CST
I live in N IL and am new to gardening and just planted a few iris' 2 falls ago and a few last fall. I found out I have iris borers in most of the plants. I removed the leaves and killed the borers which are small right now and none made it to the rhizomes. Is that enough? These are pictures of Breakers (blue) which took 2 years to bloom and Berry Fulfilling (kind of burgundy) which bloomed the first spring. Breakers is affected, Berry is not (it is in a different location). I just took these pictures. Dear Jean from 2 years ago is most affected and did not bloom this year, but she did last year. Do I need to do anything more aggressive?

Breakers


Berry Fulfilling


Have a Happy Daylily Day!!
[Last edited by ljb5966 - Jun 9, 2015 2:04 PM (+)]
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Name: Arlyn
Whiteside County, Illinois (Zone 5a)
Irises Beekeeper Region: Illinois Celebrating Gardening: 2015
crowrita1
Jun 9, 2015 12:24 PM CST
Well, that depends on how "green" you are ! The old "hunt & squish" method works....if you catch them early, and get them all. next up, would be nematodes...you put them in the soil, and the little guys eat the borers. What I use is a chemical......Bayer Long Season Grub Control.....it contains a systemic poison ( the plant actually takes up the chemical, through the roots, and, in effect, becomes "poison" itself), which can be found as either a Liquid concentrate, or a granular. (I think the granular may have some fertilizer added, as well Confused )
But a sharp eye for "borer sign" on the leaves, and a good "squish" is hard to beat !
Name: Lynnette
Northwest Illinois (Zone 5a)
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ljb5966
Jun 9, 2015 12:30 PM CST
Thanks! I will get that and use it. I don't want to start over.
Have a Happy Daylily Day!!

Region: California
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UndertheSun
Jun 9, 2015 12:42 PM CST
Welcome Lynnette! Welcome!
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
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Muddymitts
Jun 9, 2015 1:05 PM CST
Hi Lynette! Welcome to ATP and to our Iris forum. Smiling

I'm sorry to hear that you have borers. I had them too when we lived in Elmhurst, and my cousin has them almost every year in Arlington Hts. I think that part of the country is very susceptible to them. Your best defense is to keep a sharp eye out for them and catch them early, regardless of which method or product you use. Good luck with that.

So -- where in northern Illinois are you?
Thoughts become things -- choose the good ones. ([url=www.tut.com]www.tut.com[/url])
Name: Arlyn
Whiteside County, Illinois (Zone 5a)
Irises Beekeeper Region: Illinois Celebrating Gardening: 2015
crowrita1
Jun 9, 2015 1:54 PM CST
Hmmmm ! Just noticed that "Northwestern Illinois " tag.......We might be neighbors !! Sticking tongue out
Name: Lynnette
Northwest Illinois (Zone 5a)
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ljb5966
Jun 9, 2015 2:03 PM CST
I'm in McHenry County
Have a Happy Daylily Day!!
Name: Lynnette
Northwest Illinois (Zone 5a)
Image
ljb5966
Jun 9, 2015 2:06 PM CST
I live about 30 minutes from Arlington Heights. I had no idea. We must have that moth. I read that cutting off all the leaves in the fall eliminates them because the moth lays the eggs in the fall. Will the leaves all grow back in time and bloom by June if I do that?
Have a Happy Daylily Day!!
Name: Arlyn
Whiteside County, Illinois (Zone 5a)
Irises Beekeeper Region: Illinois Celebrating Gardening: 2015
crowrita1
Jun 9, 2015 2:54 PM CST
I always remove the leaves in the fall....both as a 'sanitation" measure, and to prevent them from "catching" every tree leaf that blows through the yard ! If you remove them (I cut them back to about 4"-6") you're betting rid of some insect eggs, and diseases, and every little bit helps! They will have plenty of time to grow "from *nothing* to normal height by bloom time ......the iris leaves of most cultivars, while they may still look a little green....aren't really "evergreen" in our climate. The problem with the borers is the rascals can fly in from the neighbors house, or a bush in your yard, or any one of a hundred places near your beds....they lay their eggs on many things...not just iris. So , cutting back the fans *helps*, but it's not a 100% cure all !
Name: Cynthia (Cindy)
Melvindale, Mi (Zone 5b)
Hybridizer Irises Butterflies Charter ATP Member Birds Cat Lover
Region: United States of America Region: Michigan Vegetable Grower Daylilies Hummingbirder Heucheras
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Hemlady
Jun 9, 2015 3:12 PM CST
Gosh, I didn't know that iris got borers. Does anyone have a picture of one so that I know what they look like??
Lighthouse Gardens
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
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TBGDN
Jun 9, 2015 3:28 PM CST
Hemlady said:Gosh, I didn't know that iris got borers. Does anyone have a picture of one so that I know what they look like??

Cindy, here is my 2 cents worth from last year. There are pictures near the bottom of the page.
http://garden.org/ideas/view/TBGDN/1588/Growing-Irises-in-Sp...
Lux Umbra Dei
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
Jun 9, 2015 3:46 PM CST
Good article Leon!
When counting, try not to mix chickens with blessings.
Name: Greg Hodgkinson
Hanover PA (Zone 6b)
Charter ATP Member Irises I was one of the first 300 contributors to the plant database! Region: Pennsylvania Region: Japan Garden Photography
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Misawa77
Jun 9, 2015 6:44 PM CST
I have a few of them this year. I have had little time to spend in the garden due to a foolish "home improvement" venture I jumped into.

I have had to toss about 10 rhizomes so far.
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 9, 2015 6:58 PM CST
crowrita1 said: Well, that depends on how "green" you are ! The old "hunt & squish" method works....if you catch them early, and get them all. next up, would be nematodes...you put them in the soil, and the little guys eat the borers. What I use is a chemical......Bayer Long Season Grub Control.....it contains a systemic poison ( the plant actually takes up the chemical, through the roots, and, in effect, becomes "poison" itself), which can be found as either a Liquid concentrate, or a granular. (I think the granular may have some fertilizer added, as well Confused )
But a sharp eye for "borer sign" on the leaves, and a good "squish" is hard to beat !


I also like this idea, and tried the Bayer systemic granular product beginning last year with success. I think @KentPfeiffer uses a spring burn/clean up which seems like a good sanitation program. I did some limited experimenting with burning this spring with what seems to be another good idea. So far I'm running ahead of the borers this year. I must say garden clean-up is critical along with the other methods.

Lux Umbra Dei
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
Jun 9, 2015 8:06 PM CST
Ah -- well, hello neighbor!! We've spent hours and hours and hours in McHenry County. We have horses. Our trainer was in McHenry, our brood-mare was boarded in McHenry, and our foals were boarded there too. Husband's son lives in Woodstock, and step-son lives in Huntley. We probably spent as much time in McHenry County as we did in the county we lived in!! Green Grin! We did move to Kentucky in 1985 -- so don't spend much time in McHenry County these days!!

Oh boy Greg -- sorry to hear that. It's hard to "toss" ten rhizomes. All because of a damn bug. Angry

Thing is, Cindy -- you'll likely never see the borer -- you'll see the damage done first. So pay attention to that foliage. If it's behaving in ways that it shouldn't, borers are one of the possibilities. Investigate. Even if you have them, if you catch them early -- not much damage done. And keep a clean garden -- all of the above recommendations are good ones. The only thing I would mention is that anything *systemic* can pass to the bees -- which are fighting an enormous battle. So anything that can be handled in a non-chemical way is a good thing. And we're here if you need help, or a pat on the back!! Smiling
Thoughts become things -- choose the good ones. ([url=www.tut.com]www.tut.com[/url])
Name: Cynthia (Cindy)
Melvindale, Mi (Zone 5b)
Hybridizer Irises Butterflies Charter ATP Member Birds Cat Lover
Region: United States of America Region: Michigan Vegetable Grower Daylilies Hummingbirder Heucheras
Image
Hemlady
Jun 10, 2015 5:53 AM CST
Thanks Leon and Mary Ann. I certainly will keep an eye out for anything unusual looking.
Lighthouse Gardens
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
Jun 10, 2015 8:03 AM CST
So Greg -- what "foolish home improvement" are you involved in?
Thoughts become things -- choose the good ones. ([url=www.tut.com]www.tut.com[/url])
Name: Bonnie Sojourner
Harris Brake Lake, Arkansas (Zone 7a)
Magnolia zone
Region: United States of America Region: Arkansas Master Gardener: Arkansas Irises Bulbs Seed Starter
Gardens in Buckets Garden Art Plant and/or Seed Trader Moon Gardener Garden Ideas: Master Level Celebrating Gardening: 2015
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grannysgarden
Jun 10, 2015 8:25 AM CST
he was doing a bathroom makeover?? if I remember right?? I think he was going to do it on a weekend when his wife or family was out of town. Maybe that was someone else. I think my rememberer has gone passed the stage of forgetting things and has started making things up.
I love my garden.... and Jesus, and coffee, and naps.......
Name: Celia
West Valley City, Utah (Zone 7a)
Pour vivre parmi les fleurs
Irises Garden Photography I was one of the first 300 contributors to the plant database! Celebrating Gardening: 2015 Butterflies Birds
Cat Lover Enjoys or suffers cold winters Hummingbirder Plant Identifier
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Zencat
Jun 10, 2015 8:43 AM CST
Rolling on the floor laughing Rolling on the floor laughing Rolling on the floor laughing
Name: Greg Hodgkinson
Hanover PA (Zone 6b)
Charter ATP Member Irises I was one of the first 300 contributors to the plant database! Region: Pennsylvania Region: Japan Garden Photography
Image
Misawa77
Jun 10, 2015 8:56 AM CST
Bonnie is correct. The valve that controls the shower/tub is leaking. I have fixed one leak and am going after the other. I am having to maneuver in some very tight spaces.

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