Irises forum: Early pest controle

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Name: Jo Ann Gentle
Pittsford NY (Zone 6a)
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ge1836
Mar 15, 2012 3:56 PM CST
Is anyone drenching for borers early?

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Name: Tom
Southern Wisconsin (Zone 5b)
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tveguy3
Mar 15, 2012 4:53 PM CST
We are expecting a big rain shower here on Saturday, so I am planning on spreading my chemicals just ahead of it. The rule of thumb is after two days in the 70's without frost at night, we have exceeded that here in Southern Wisconsin. Nasty little critters!
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: Shannon
Burkeville,Va (Zone 7a)
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Shannon
Mar 15, 2012 7:28 PM CST
Im new to this. What should I use on my iris ?

Thanks


Smiling
The horse is God's gift to mankind. ~Arabian Proverb
Name: Jan
Hustisford, WI
I was one of the first 300 contributors to the plant database! Cat Lover Daylilies Dog Lover Irises Region: United States of America
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philljm
Mar 15, 2012 8:07 PM CST
I want to know too. I had an old clump of iris that I dug up last year that had borers. So what is the best way to handle them - what products, etc. Thanks, ~Jan
Name: doglover
Illinois (Zone 5a)
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doglover
Mar 15, 2012 10:31 PM CST
me too, please tell us what is best to use. AND are they safe for your dogs and cats to be around? Also, if it is going to rain, are you using a dry treatment instead of a liquid? thank you, Marsha
Name: Jo Ann Gentle
Pittsford NY (Zone 6a)
Charter ATP Member I was one of the first 300 contributors to the plant database! Cat Lover Heucheras Hellebores Container Gardener
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ge1836
Mar 16, 2012 2:36 AM CST
I am new to iris but DD moved some of hers here 5 years ago. They have been disappearing slowly ever since. I am not sure it isnt a combination of borers and rot.
ANYWAY!!
I use Bayer Tree and Shrub .It says "for borers" right on the lable. Its a liquid and I sprayed our iris last year. Many iris people use this . I will drench my new iris this week as its been in the 70's and will go to 80 a couple of days. I also use Bayer on my lilies for the Red Lily Beetle.
The product containes Imidicloprid which is a "soft skinned insectacide" guess thats the borer alright.

Name: Tom
Southern Wisconsin (Zone 5b)
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tveguy3
Mar 16, 2012 4:00 AM CST
Here's a link that should be helpful. The active ingredient necesary is Imidicloprid. I use the granular form made by Bayer, just spread it around, but not on the rhizomes, then water, or let the rain do its trick.. I get it at the Farm and Fleet store, but I'd guess any garden supply or farm supply store would have it. It seems to be pet safe, but one side problem is that it may be harmful to bees. It doesn't seem to harm the Japanese beetles though. (AAARRRGGGGG) Areas in the far South may not have this problem though, I hear.


http://www.irisgarden.org/borermain.html
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: Jo Ann Gentle
Pittsford NY (Zone 6a)
Charter ATP Member I was one of the first 300 contributors to the plant database! Cat Lover Heucheras Hellebores Container Gardener
Birds Region: New York Irises Garden Ideas: Master Level Avid Green Pages Reviewer Lilies
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ge1836
Mar 16, 2012 4:20 AM CST
I use the liquid and will drench this weekend.
Thanks for the article. Merit mentioned is the same as Bayer Tree and Shrub but only available to commercial growers as I understand.
[Last edited by ge1836 - Mar 16, 2012 4:22 AM (+)]
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Name: Lucy
Hamilton, MA (Zone 6b)
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irisarian
Mar 16, 2012 6:34 AM CST
We don't spray. John hand picks them & now I do some of that. We like the bees in the garden.
Name: Shannon
Burkeville,Va (Zone 7a)
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Shannon
Mar 16, 2012 6:40 AM CST
I've never seen those little bugger's Thankfully. But,like Lucy I like my bee's . Had a few this week
buzzing around my camalia's
The horse is God's gift to mankind. ~Arabian Proverb
Name: Jo Ann Gentle
Pittsford NY (Zone 6a)
Charter ATP Member I was one of the first 300 contributors to the plant database! Cat Lover Heucheras Hellebores Container Gardener
Birds Region: New York Irises Garden Ideas: Master Level Avid Green Pages Reviewer Lilies
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ge1836
Mar 16, 2012 6:57 AM CST
I believe the beetle is further north and is quite widespread from Mass. into the Michigan area.
I looked at an article about Imicloprid and bees. I have beed and couldnt believe what I read. French entemologist says they are affected and its called "mad bee disease"
Name: Polly Kinsman
Hannibal, NY (Zone 6a)

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PollyK
Mar 16, 2012 7:03 PM CST
I think it's been pretty much proven the death of the bees was caused by mites, not Imidicloprid as originally thought. I used the Bayer drench on my irises, and have seen no death of bees. On the contrary we have tons of different kinds of them. They seem to love the hydrangeas.
Name: Shannon
Burkeville,Va (Zone 7a)
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Shannon
Mar 16, 2012 7:13 PM CST
Maybe it is a good idea to treat my iris then. Being we are moving to RI my iris will be protected .
And the bee's will BE ok Will the granular work as well ? They have that at my local Walmart
The horse is God's gift to mankind. ~Arabian Proverb
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
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PollyK
Mar 16, 2012 7:14 PM CST
Yes, just make sure it has Imidacloprid in it.
Name: Shannon
Burkeville,Va (Zone 7a)
The House on the Hill Gardens
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Shannon
Mar 16, 2012 7:39 PM CST
Thanks Lovey dubby
The horse is God's gift to mankind. ~Arabian Proverb
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
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PollyK
Mar 16, 2012 7:53 PM CST
You're welcome.
Name: Kent Pfeiffer
Southeast Nebraska (Zone 5b)
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KentPfeiffer
Mar 16, 2012 9:03 PM CST

Moderator

While it's true that no link has been established between Imidacloprid and Colony Collapse Disorder/Mad Bee Disease, it has been conclusively shown that Imidacloprid is lethal to bees, even at very low concentrations. The only points of contention at this time are whether the concentration of Imidacloprid in the pollen and nectar of various plants is sufficient to kill bees and how vulnerable non-honey bee species (there are thousands of species of bees in North America alone, but almost all the research to date is focused on honey bees) are to the pesticide. The bottom line is, if you care at all about bees, you ought to carefully consider what you put on your plants and why.
Name: Lucy
Hamilton, MA (Zone 6b)
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irisarian
Mar 16, 2012 9:32 PM CST
I bet the clorox soak used for rot might bother the borers. Look closely there might be eggs or they are very young & easy to pick off.
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
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PollyK
Mar 17, 2012 8:15 AM CST
Thanks Kent. I think we should all be aware of what pesticides can do, and use them as sparingly as possible.
Name: Angie
Concord, NC (zone 7)
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Hemophobic
Mar 29, 2012 6:38 PM CST
Not sure this is an iris borer problem, but an iris scape has suddenly turned mushy (and smelly). I've dug out as much of it as I could and put it in the garbage, but should I destroy the whole plant? Is this the damage that iris borers do? Yuk!
I think that if ever a mortal heard the voice of God it would be in a garden at the cool of the day. ~F. Frankfort Moore, A Garden of Peace

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