Daylilies forum→Daylily quarantine and social-distancing

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Name: Orion
Boston, MA (Zone 6b)
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plasko20
Mar 26, 2021 9:30 AM CST
When a new fan you have requested comes in is it good practice to pot it up, in isolation, and treat it with fungicides and observe it for a while before you then decide to plug it in the ground to be with your other daylilies? Or is that way too paranoid, and daylilies are virtually indestructable anyhow, so you just stick them straight in the ground after soaking them?
Spring is the time all the orders are coming in, and I am at a crossroads of which option to choose. Help. Thinking


Gardening: So exciting I wet my plants!
Name: Sue
Ontario, Canada (Zone 4b)
Daylilies Birds Enjoys or suffers cold winters Native Plants and Wildflowers Butterflies Annuals
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sooby
Mar 26, 2021 10:03 AM CST
In these days of daylily rust, gall midge and leafminer it wouldn't hurt to do an isolation period away from other daylilies. I doubt many people do though. Whether you want to go the extra step of a fungicide might depend on where the plant was purchased from and the likelihood thereof of carrying rust. Not that buying from someone outside the "rust zone" necessarily guarantees safety if they have brought new plants in themselves before shipping yours. Nor is a fungicide guaranteed to prevent it.

To reduce the risk of gall midge it's advised to buy bareroot and cut off any scapes that have already started to emerge.

For leafminer, if you don't already have it since it was first discovered in Maine several years ago, you would watch for mines and pick off and destroy any affected leaves from below the lower end of the mine.
[Last edited by sooby - Mar 26, 2021 10:05 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
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Seedfork
Mar 26, 2021 10:59 AM CST
I noticed that the ADS site says that the pupae might overwinter in the crown or dead leaves. I don't know how early in the year the pupae emerge as an adult fly? Leafminer was a big problem last year, worst ever, so I am experimenting with using Malathion early in the year trying to stop them early, only time will tell if it will be of any use, also hoping to reduce the aphid and thrip problem. It just seemed the little black flies were being seen more and more often in my garden, and I hate how those little mines detract from the look of the foliage. Who left the door open and let all those flies in?
I am also experimenting this year with an Azoxystrobin root soak on new plants coming in if they are bare root. Doing a drench if they are potted. We'll see if that helps any this year with rust and leafstreak. Early this year I have been on a two week spray cycle, hope to be able to extend that to three weeks later. Rotating or mixing together with chlorothalonil, miracle-grow and using a spreader sticker I purchased at Tractor Supply.
Name: Orion
Boston, MA (Zone 6b)
Lover of wildlife (Raccoon badge) Birds Bee Lover Foliage Fan Butterflies Dragonflies
Daylilies
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plasko20
Mar 26, 2021 11:23 AM CST
Oh boy. I was only thinking fungus, but now you have really opened my eyes.
I have just done a quick read and thankfully I have BTi (bacteria Bacillus thuringiensis var. israelensis) in my arsenal for fungus gnats and mosquitoes (but does not harm adult bees or butterflies). It is also said to work on the larval stage of leafminers, too! Another 'natural' alternative may be pyrethrin that could be toxic to the larvae. I am not sure about neem, I will have to investigate further.
But thank-you for your insight. Thumbs up
Gardening: So exciting I wet my plants!
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
Mar 26, 2021 11:28 AM CST
Malathion being a non-systemic contact insecticide I don't think it will do much for leafminers, where the larvae are protected inside the leaves. As the AHS Dictionary says: "Larvae and pupae would be unaffected by contact insecticides which would likely kill predators and tiny wasp species that have been found to attack this pest." For a contact insecticide to work for leafminers you would have apply at exactly the right time to catch the adults and in your climate the daylily leafminer likely has more than one generation, which presumably may also overlap.
Name: Larry
Enterprise, Al. 36330 (Zone 8b)
Composter Daylilies Garden Photography Million Pollinator Garden Challenge Garden Ideas: Master Level Plant Identifier
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Seedfork
Mar 26, 2021 11:38 AM CST
I did read that, but I was hoping to be able to maybe spray the lava as they emerged? How long is that process? How long does the fly have to dry its wings before it can fly? I don't know so I am just experimenting. Does the process of emerging take a minute, or a couple of days?
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
Mar 26, 2021 12:20 PM CST
I don't know the answers, I just know that typically with leafminers a contact insecticide can do more harm (by killing beneficials) than good. Timing to get the leafminer adults that way is critical, although you may get some by pure luck.
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
Mar 26, 2021 12:50 PM CST
Due to the extent of the increasing leafminer problem in my garden I am assuming the beneficials were not present.
[Last edited by Seedfork - Mar 26, 2021 5:51 PM (+)]
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Name: Zoia Bologovsky
Stoneham MA (Zone 6a)
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Zoia
Mar 26, 2021 2:53 PM CST
I have always had some leafminers but their favorite plant seems to be Columbines. I have quite a few of those spread around the gardens and they seem to act as a leaf miner and aphid magnet. The Columbines still look basically alright and the Daylilies get left alone.
Name: Larry
Enterprise, Al. 36330 (Zone 8b)
Composter Daylilies Garden Photography Million Pollinator Garden Challenge Garden Ideas: Master Level Plant Identifier
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Seedfork
Mar 26, 2021 3:19 PM CST
I do believe those are a different leafminer, seems like I read that the only host plant for Daylily Leafminer is just daylilies.
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
Mar 26, 2021 3:41 PM CST
Seedfork said:I do believe those are a different leafminer, seems like I read that the only host plant for Daylily Leafminer is just daylilies.


You're correct, Larry, the daylily leafminer is Ophiomyia kwansonis and it does not affect columbines. It's specific to daylilies.

Name: Zoia Bologovsky
Stoneham MA (Zone 6a)
Enjoys or suffers cold winters Cat Lover Butterflies Birds Region: Massachusetts Bee Lover
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Zoia
Mar 26, 2021 4:24 PM CST
Great, now I might have two kinds of leaf miner. Blinking
Name: Maryl
Oklahoma (Zone 7a)
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Maryl
Mar 27, 2021 1:29 AM CST
Before the RRV virus decimated the rose world, I grew my share of roses. I like/liked Miniatures and they were especially prone to spider mites. As things often happen in science while you are developing a chemical against one pest you find out it works on others as well. AVID was first touted as a revolutionary control for leaf miners on Columbines in the Greenhouse. Since it penetrated the outer leaf surface it got the larvae where they lived - inside the leaf. Then they discovered that Avid worked very well for Spider Mite control also. That's where I came in. It worked like a charm for my mite problem. Since then Avid has been discovered to affect other pests, so it now has additional benefits. When I researched it originally (early 90's or so) I found the active ingredients to be less harmful to me and the environment then some of the more ineffective topical sprays. Below are two links about leaf miners that may be helpful:
https://entomology.ces.ncsu.ed...
https://www.amazon.com/dp/B004CZ866E/
Hope this information is helpful..............Maryl
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
Mar 27, 2021 12:11 PM CST
@Maryl
Thanks so much for the info about Avid. I am looking for a source now and hopefully it is affordable. How much do you mix with a gallon of water, maybe I should ask what the exact product you used, being there might be different strengths available?
I found this: This is the place I bought my Azoxystrobin from and was the best price I could find.
https://www.pestrong.com/726-a...
[Last edited by Seedfork - Mar 27, 2021 12:22 PM (+)]
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Name: Maryl
Oklahoma (Zone 7a)
Cat Lover Daylilies Roses Container Gardener Plant Lover: Loves 'em all! Cactus and Succulents
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Maryl
Mar 27, 2021 2:03 PM CST
Larry: That looks like a great price. I bought my AVID under the brand name of Banner Maxx, which is what rosarians recommended. The recommended dosage was 1/3 teaspoon per gallon. Yes, that's right- 1/3 of a teaspoon. A little goes a long way therefore making it very cost effective for larger plantings. The original manufacturer for retail AVID was Syngenta. I don't know about other companies and brand names and since I don't grow minis any longer I haven't had need of AVID in quite some time. In fact back when I was buying it they sold it in pints, and later they upped the quantity you had to buy making the price for small growers a little stiff. There is around a 5 year shelf life, so use it or loose it (and make sure you are getting fresh stock). Also keep it in a temperate environment between uses. For spider mites the frequency of spraying was important (1 week, 1 week, 2 weeks), but for leaf miners I don't have a clue. Just be aware of the fact that you may need to follow a specific schedule of spraying for a complete kill on miners. I swear by AVID and although other products came along, I never switched. Why mess with success. Here's my link to a Chemical company devoted to rosarians. About half way down the page you will see what looks to be the same product you have in your link. Please take a minute to read the blurb about cheaper imitations and products. Sometimes you do get what you pay for.......Maryl
http://rosemania.com/page9.htm...
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
Mar 27, 2021 2:09 PM CST
Maryl said:Larry: That looks like a great price. I bought my AVID under the brand name of Banner Maxx, which is what rosarians recommended.


Banner Maxx is the fungicide propiconazole.
Name: Maryl
Oklahoma (Zone 7a)
Cat Lover Daylilies Roses Container Gardener Plant Lover: Loves 'em all! Cactus and Succulents
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Maryl
Mar 27, 2021 2:24 PM CST
Of course! I grabbed the wrong bottle. Geezle Peezle!! I now have AVID 0.15 EC in my little hand and it is 1/4 teaspoon per spray. Outside of grabbing the wrong brand and changing the dose the rest of the information stays the same. I'm hoping the squirrel in my brain is off his break now and back running in his cage.................Maryl
Name: Maryl
Oklahoma (Zone 7a)
Cat Lover Daylilies Roses Container Gardener Plant Lover: Loves 'em all! Cactus and Succulents
Region: Oklahoma Enjoys or suffers hot summers
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Maryl
Mar 27, 2021 4:50 PM CST
continuing my errata: Banner Maxx is NOT an insecticide. It is a fungicide for blackspot. Avid is an insecticide. Just wanted to make the difference clear. Squirrel says - over and out.................Maryl
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
Mar 27, 2021 7:51 PM CST
I kept reading and searching and found this: Much more affordable
https://www.pestrong.com/903-a...
Name: Maryl
Oklahoma (Zone 7a)
Cat Lover Daylilies Roses Container Gardener Plant Lover: Loves 'em all! Cactus and Succulents
Region: Oklahoma Enjoys or suffers hot summers
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Maryl
Mar 27, 2021 11:24 PM CST
Sounds good to me as long as the concentration is the same (and it appears to be). After all we don't even know if AVID is effective against the daylily leaf miner (it was developed for Columbine leaf miner). If this proves to do the job, then money well spent. I hope you will let us know. I too have noticed an uptake in leaf miners in my daylilies. Not attractive at all. If you can kill them en masse for a season, then maybe there will be less generations to combat next season...................Maryl

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