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Mar 30, 2016 3:43 PM CST
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
I don't recall having rust show up this early, but my memory is not that good.
'Awesome Blossom' has nice broad dark green leaves but I noticed several had turned yellow, and when I checked the specks of rust were on several leaves up the full length almost. It does have a rust resistance rating of 2.0, but looks like it is going to be a rusty year with all this rain we have had. So far all I have done is pulled off the rusty leaves, tomorrow I may spray with liquid dish detergent.
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Mar 30, 2016 4:15 PM CST
Name: Arlene
Florida's east coast (Zone 9a)
Birds Bromeliad Garden Photography Daylilies Region: Florida Enjoys or suffers hot summers
Tropicals
Larry, early spring rains and humid conditions bring on early rust. I have it, but the nasty strong winds we have had created even more damage to leaves that sorta looks like rust. It doesn't matter what the rust rating is on any plant. Only important is what it does in your garden.

I don't have much rust because we haven't had 2" of rain this month. It's been humid, but very little rain. It goes north of us and south of us. We all know that problem!
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Mar 30, 2016 4:38 PM CST
Name: Liz Quinn
Statesville, NC (Zone 7a)
Bee Lover Birds Butterflies Cat Lover Composter Daylilies
Dog Lover Heucheras Region: North Carolina
Thank you Larry for the heads up. I haven't seen any here yet. Thank You!
Liz
What doesn't kill you makes you stronger .
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Mar 30, 2016 6:09 PM CST
Name: Marilyn, aka "Poly"
South San Francisco Bay Area (Zone 9b)
"The mountains are calling..."
Region: California Daylilies Irises Vegetable Grower Moon Gardener Dog Lover
Bookworm Garden Photography Birds Pollen collector Garden Procrastinator Garden Ideas: Level 1
There has been some rust here too, thanks to the rain that we have had the past couple of months. I've been pulling leaves, and may punt another plant. (It's disheartening... from it's parentage, I would have expected better resistance. I'll wait a bit and see what it does, I guess.)

In the seedling patch, several of them showed some signs of rust late last winter (when they were still crammed in 4" pots and there was heavy rust pressure in the garden), but I planted them out anyway. A couple of the bigger and older ones are presently looking suspicious, but the rest, thus far, seem okay. (Knock on wood...) The sketchy ones are from my dabbling at trying to improve rust resistance in near white tets, so no big surprise there.
Evaluating an iris seedling, hopefully for rebloom
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Mar 30, 2016 10:13 PM CST
Name: Becky
Sebastian, Florida (Zone 10a)
Celebrating Gardening: 2015 Daylilies Hummingbirder Butterflies Seed Starter Container Gardener
Charter ATP Member I was one of the first 300 contributors to the plant database! Garden Ideas: Master Level Lover of wildlife (Black bear badge) Birds Ponds
I've definitely been seeing rust on many of mine. We've had a wet and warm Winter. I hope to "eventually" (not sure how long that may take) have less instead of more rusty daylilies in my garden.
What lies behind us and what lies before us are tiny matters, compared to what lies within us.
Garden Rooms and Becky's Budget Garden
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Mar 31, 2016 12:51 AM CST
Name: Marilyn, aka "Poly"
South San Francisco Bay Area (Zone 9b)
"The mountains are calling..."
Region: California Daylilies Irises Vegetable Grower Moon Gardener Dog Lover
Bookworm Garden Photography Birds Pollen collector Garden Procrastinator Garden Ideas: Level 1
Well, I'm slowly getting there. When I get around to it, some number of cultivars will get the boot from the garden this year, at least partly due to rust susceptibility.

The problem is that new plants come in, it is not always possible to research parentage, and I am still a sucker for certain characteristics...

But this year I am buying few(er) daylilies, and most of those should have some degree of rust resistance.

In our seedling patches, we can select for rust resistance.

And so it goes...
Evaluating an iris seedling, hopefully for rebloom
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Mar 31, 2016 4:05 PM CST
Name: Pat
Near McIntosh, Florida (Zone 9a)
Rust has been here already in zone 9a,
but it is becoming hot so rapidly that it may not do well for long...
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Apr 9, 2016 8:31 AM CST
Name: Susiep
Wetumpka, AL (Zone 8a)
Cat Lover Daylilies Frogs and Toads Irises Pollen collector Region: Alabama
The WITWIT Badge Vegetable Grower
Larry,

How and what kind of liquid dish detergent do you use and how often do you spray? Does it prevent rust or control it?

Thanks !

Susie
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Apr 9, 2016 9:55 AM CST
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
This year I have held off on spraying anything. Last year I just used a cheap dollar store brand dish detergent and it seemed to help control the rust on those plants. I have no proof it was the detergent or coincidence, but I think at least some form of Dawn dish detergent has been actually shown to aid in controlling rust, but I know of no special ingredient in it that was the reason. I think you see Dawn detergent recommend all the time just because it was the one actually used in the test, I doubt it is actually much better than many others. Although, I have read to avoid some, I just don't remember why that was.
Last edited by Seedfork Apr 11, 2016 6:52 AM Icon for preview
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Apr 9, 2016 10:03 AM CST
Name: Sue
Ontario, Canada (Zone 4b)
Annuals Native Plants and Wildflowers Keeps Horses Dog Lover Daylilies Region: Canadian
Butterflies Birds Enjoys or suffers cold winters Garden Sages Plant Identifier
The original study was with UltraDawn at 1% to water. As far as I remember it was most likely lemon. Larry, I think people say to avoid the antibacterial ones because of the added chemicals. The one used in the study would not have been antibacterial.

Here's the original study if anyone wants to read it:

http://www.uoguelph.ca/%7Ethsi...
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Apr 9, 2016 1:11 PM CST
Name: Eddie Raye Andrews
Texas (Zone 8b)
Daylilies Roses Region: Texas
Have already sprayed twice this year. Rust hit early because of the cooler weather with the rains. Will continue to spray until hot summer weather which means it won't grow.
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Apr 10, 2016 6:19 PM CST
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
Region: Wisconsin
And this is one reason I am glad I live in the north. The few times I have had rust, it thankfully dies off in the winter.
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Apr 12, 2016 7:05 AM CST
Name: Liz Quinn
Statesville, NC (Zone 7a)
Bee Lover Birds Butterflies Cat Lover Composter Daylilies
Dog Lover Heucheras Region: North Carolina
Yesterday I walk the garden beds and didn't see any rust. Thank goodness. Will keep looking.
Liz
What doesn't kill you makes you stronger .
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Apr 12, 2016 7:55 AM CST
Name: Arlene
Florida's east coast (Zone 9a)
Birds Bromeliad Garden Photography Daylilies Region: Florida Enjoys or suffers hot summers
Tropicals
I've looked and have not found rust susceptibility ratings on specific daylilies. Where can I find this?
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Apr 12, 2016 8:27 AM CST
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
The best place I know is right here in the ATP daylily database. The trouble is so many thousands have not been rated.
Search by characteristics (height, bloom color, etc)
Then select:
Rust Resistance Decimal Score:
Use the down arrow to select the rating you want, one is the best and five is the worst.

Somewhere I did notice some vendors starting to at least say in the descriptions of their plants if they appear to be rust resistant in their gardens. The problem being there that most have a spray program so really are not aware which ones might show rust if not sprayed.
Last edited by Seedfork Apr 12, 2016 8:28 AM Icon for preview
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Apr 12, 2016 8:36 AM CST
Name: pam
gainesville fl (Zone 8b)
Bee Lover The WITWIT Badge Region: Ukraine Enjoys or suffers hot summers Pollen collector Native Plants and Wildflowers
Hydrangeas Hummingbirder Dragonflies Daylilies Butterflies Birds
Ive got rust too, just sprayed again today. Isnt the end of the world to me, I do like to control it tho. Luckily, so far, no slugs. Those things tore up my flowers last year, horrible. At least the rust doesnt bother the flower. Im about to throw all those little sf's I got last year away. They are really the only things that I cant get rid of the rust. The big plants, not such a problem.
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Apr 12, 2016 11:29 AM CST
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
I had a beautiful NOID plant in the garden, very tall and stout looking, but today I noticed it had a bad case of rust developing on all three fans. I took my knife and cut it all down to about an inch of the ground, and I am going to see how that affects the plant and the rust. A few more named cultivars have started getting more rusty leaves. I am really wanting to go the entire year and not spray and see just which plants don't get rust or at least not too bad. I just don't know if I will be able to go through with that plan as I watch more and more of them succumb to rust. My Awesome Blossom plant and my Tuscawilla Tigress are two that even though listed as rust resistant are showing more and more rust on a daily basis. I have not seen a scape on Tuscawilla Tigress yet, so I may just cut it down low also.
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Apr 12, 2016 12:19 PM CST
Name: Arlene
Florida's east coast (Zone 9a)
Birds Bromeliad Garden Photography Daylilies Region: Florida Enjoys or suffers hot summers
Tropicals
The problem with plants that have rust ratings is that most of them are 15 yr old or older. I don't do many older plants, so just have to take my chances. I sprayed today for rust and for aphids.
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Apr 12, 2016 8:30 PM CST
Name: Becky
Sebastian, Florida (Zone 10a)
Celebrating Gardening: 2015 Daylilies Hummingbirder Butterflies Seed Starter Container Gardener
Charter ATP Member I was one of the first 300 contributors to the plant database! Garden Ideas: Master Level Lover of wildlife (Black bear badge) Birds Ponds
Arlene - I do a search as Larry instructed above and often just put in rust resistance and not necessarily a rating. But I do it both ways to find all the cultivars. When I do that, the list it typically not very long because I am also searching for ev or sev at the same time. Larry is right ... which thousands of registered cultivars, only a small percentage has been rated for rust.

I also look at pedigree. ATP has an awesome database because not only can you do a search by name, but the daylily database will list parents of a cultivar (if known). You can click on each of the parent's names and check their rust resistance. And often I go on to the grandparents to also check them. If I see any rated as rust susceptible of 4.0 or 5.0 .... I don't bother considering the cultivar. The genes are there for rust susceptibility, IMHO. Granted, I do know that some children from such plants can show rust resistance, but since I like to hybridize, I prefer not to take the chance. There are too many other daylily cultivars out there for me to try, so I don't waste my time or money on a possible rusty plant or a plant with genetics that might show rust susceptibility.

I hope this info is helpful.

I also like some of the older cultivars. Breeding them with newer ones might surprise you with some very nice, rust resistant children! Thumbs up
What lies behind us and what lies before us are tiny matters, compared to what lies within us.
Garden Rooms and Becky's Budget Garden
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Apr 12, 2016 9:54 PM CST
Name: Mike
Hazel Crest, IL (Zone 5b)
"Have no patience for bare ground"
@philljm, Jan it has been awhile. Good to see you.
Larry, Daryl Apps use to cut his rust infected plant to the ground also. He also sprayed them after doing so. I forgot what he used to treat them. The article is on the web. I will see if I can find and share it here.
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