Daylilies forum→Leafminer on daylilies

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Name: Larry
Enterprise, Al. 36330 (Zone 8b)
Composter Daylilies Garden Photography Million Pollinator Garden Challenge Garden Ideas: Master Level Plant Identifier
Celebrating Gardening: 2015 Region: Alabama
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Seedfork
Jun 15, 2021 6:32 PM CST
For the past few years, leafminer has become a bigger problem each year. Last year my daylilies look so bad because of leafminer I vowed to try to do something this year to solve the problem.
Now, I am not saying the problem is solved, but it is definitely over 90 percent better than it was last year...once again, I can not say it is definitely due to something I have done. Could be the weather, or other natural causes. However,
due to the weather forecast the weather for the next three days looks favorable for spraying. I thought I would go double check the progress. Even though I am out in the garden everyday, I seem to have a one track mind and don't seem to be able to focus but on one task at a time, so I have to make special trips out to check on everything.
So I did find some leaf miner damage, but it was only on a few plants and only one or two leaves per plant. Now that is a huge improvement over almost every plant and almost every leaf and with more than one mine per leaf on many.
I purchased a quart of Abamectin 0.15EC Select and I have sprayed once every two weeks for about three months now. I used 1/2 tsp. per gal. and I just want to say how pleased I am with the results.
I would love to know if anyone out there has had success with this product also, or if you have had success with any other product against daylily leafminer.
[Last edited by Seedfork - Jun 15, 2021 8:17 PM (+)]
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Name: Robin
Southern Michigan (Zone 6a)
Region: Michigan Seller of Garden Stuff Seed Starter Cat Lover Daylilies Million Pollinator Garden Challenge
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RobinSeeds
Jun 15, 2021 7:44 PM CST
Larry, I haven't had a huge problem with leaf miner damage on my DL's, I sure have it on my Columbine, they're probably the tastiest leaves in the garden here. I also haven't tried Abamectin but am going to spray with Neem Oil. I'm going to try 2 tablespoons per gallon of water.
God blessed me with dirt.
('Mipii' on The LA)
Name: Larry
Enterprise, Al. 36330 (Zone 8b)
Composter Daylilies Garden Photography Million Pollinator Garden Challenge Garden Ideas: Master Level Plant Identifier
Celebrating Gardening: 2015 Region: Alabama
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Seedfork
Jun 15, 2021 7:47 PM CST
Good luck with the Neem Oil, I spoke with a man who told me he used a light weight agricultural oil and had good luck with it on leafminer and with reducing rust.
Name: Sue
Ontario, Canada (Zone 4b)
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sooby
Jun 15, 2021 8:10 PM CST
Robin have you seen leafminer on daylilies there? It's not the same insect that mines on columbine.
Name: Ann
Columbus, Ohio (Zone 6a)
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Hortaholic
Jun 15, 2021 9:33 PM CST
Columbine leafminer has been here for decades. Most of the damage is done after the plants flower. It sometimes kills some of the leaves, but doesn't kill the plants, so I ignore it.

Daylily leafminer showed up here the year after it appeared so obviously in the Houston National Convention gardens. Maybe it was here before, and I didn't notice.

Once I started noticing, it appeared to be scattered all through the beds. It has never developed to a significant problem. There are probably not as many generations here as in warmer climates.

I've never treated for it and don't expect to.

Ann (formerly Pat; too many Pats)
Ann (formerly Pat; too many Pats) my middle name
Name: Robin
Southern Michigan (Zone 6a)
Region: Michigan Seller of Garden Stuff Seed Starter Cat Lover Daylilies Million Pollinator Garden Challenge
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RobinSeeds
Jun 16, 2021 12:25 AM CST
Sue I haven't seen much leaf miner damage on DL's. My Columbines get a double whammy with the miners drawing swirly shapes through the inner parts of the leaf and a little green caterpillar munches all around the perimeter giving the leaf a scalloped edge. They never like their artistic touches so they just keep on munching, to fix their mistakes. They fix their mistakes to the nubbins and the plant dies. Thumbs down
God blessed me with dirt.
('Mipii' on The LA)
Name: Sue
Ontario, Canada (Zone 4b)
Daylilies Birds Enjoys or suffers cold winters Native Plants and Wildflowers Butterflies Annuals
Region: Canadian Keeps Horses Dog Lover Plant Identifier Garden Sages
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sooby
Jun 16, 2021 4:29 AM CST
Thanks, Robin. The reason I asked is that I haven't seen the daylily leafminer here - yet. I expect it will arrive eventually and if it is already in Michigan it's getting close to Ontario. I don't know if anyone in Ontario already has it though. Since it was first discovered in Maine then it was not all that far from Canada to start with!
Name: Nan
southeast Georgia (Zone 8b)
Keeps Horses Daylilies Region: Georgia Birds Bookworm
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DeweyRooter
Jun 16, 2021 5:59 AM CST
I had a lot of leafminers last year. I don't want to spray anything, so this year, I thought I would try sprinkling diatomaceous earth around the base of each plant to catch the second generation as they emerge from the earth. I am reporting that this did no good at all. I still have leaf miners and am resigned to them.
Name: Sue
Ontario, Canada (Zone 4b)
Daylilies Birds Enjoys or suffers cold winters Native Plants and Wildflowers Butterflies Annuals
Region: Canadian Keeps Horses Dog Lover Plant Identifier Garden Sages
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sooby
Jun 16, 2021 6:23 AM CST
DeweyRooter said:I had a lot of leafminers last year. I don't want to spray anything, so this year, I thought I would try sprinkling diatomaceous earth around the base of each plant to catch the second generation as they emerge from the earth. I am reporting that this did no good at all. I still have leaf miners and am resigned to them.


According to the AHS page on the leafminer, they pupate still in the daylily, therefore DE on the earth around the base wouldn't seem to affect them.

"Pupation occurs in the larval tunnel, with the pupa appearing like a small (3-4mm), tan rice grain, under the surface, often near the leaf base"

https://daylilies.org/daylily-...
Name: Nan
southeast Georgia (Zone 8b)
Keeps Horses Daylilies Region: Georgia Birds Bookworm
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DeweyRooter
Jun 16, 2021 9:41 AM CST
sooby said:

According to the AHS page on the leafminer, they pupate still in the daylily, therefore DE on the earth around the base wouldn't seem to affect them.



Well, I guess that explains it.
Name: Tee T.
Elk Grove, CA (Zone 9b)
Liliesmaniac
Jul 2, 2021 7:37 AM CST
Thank you Larry. I try your method. Last year it was bad and I see some plants already have leafminer. Where can I buy it? I live in California, lots of restrictions.
[Last edited by Liliesmaniac - Jul 2, 2021 9:09 AM (+)]
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Name: Larry
Enterprise, Al. 36330 (Zone 8b)
Composter Daylilies Garden Photography Million Pollinator Garden Challenge Garden Ideas: Master Level Plant Identifier
Celebrating Gardening: 2015 Region: Alabama
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Seedfork
Jul 2, 2021 11:43 AM CST
Liliesmaniac,
I purchased mine online : I did not see anything about not shipping to California, but double check that.
https://www.pestrong.com/903-a...

This is a quote from their site:
"This is generic Avid 0.15 EC.
We may ship any Generic Brand (A.I Abamectin -- 1.9% or more) depends on current stock & availability, but mostly Abamectin 0.15 EC Select, Quali-pro Abamectin 0.15 EC, Timectin 0.15 EC."
Name: Tee T.
Elk Grove, CA (Zone 9b)
Liliesmaniac
Jul 2, 2021 12:59 PM CST
Thanks Larry. I see some of my seedlings already have leafminer.

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