Daylilies forum: Rust Talk 2015

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Name: Dnd
SE Michigan (Zone 6a)
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DogsNDaylilies
Sep 18, 2015 4:27 PM CST
Is Buttered Popcorn on everyone's list for any particular reason? I'm asking because I nearly got it from Oakes and then didn't, but now I'm wondering if that was a mistake. Rolling my eyes.
Name: Becky
Sebastian, Florida (Zone 10a)
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beckygardener
Sep 18, 2015 5:47 PM CST
It has shown a good rust resistance to rust according to a 2002 Georgia University study. That is why I want it.http://www.pubs.ext.vt.edu/426/426-030/426-030.html

If you live in the northern states, rust probably is not a real issue for you like it is here in the south.
What lies behind us and what lies before us are tiny matters, compared to what lies within us.
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Name: Larry
Enterprise, Al. 36330 (Zone 8b)
Region: Alabama Composter Garden Photography Garden Ideas: Master Level Plant Identifier Celebrating Gardening: 2015
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Seedfork
Sep 19, 2015 8:14 AM CST
Becky, rust resistance was one of the main reasons I purchased 'Buttered Popcorn,' sadly it has shown more rust than any of the other plants (about a half dozen) I got from Wild's in that order. You can see a photo of it in my blog, not a really bad case but more rust than I was hoping for.
Name: Becky
Sebastian, Florida (Zone 10a)
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beckygardener
Sep 19, 2015 8:43 AM CST
Larry - THAT is disappointing! Well, I have not obtained it yet, so maybe I will pass on it afterall. Or maybe it has been exposed to a different strain of rust that was not tested on it during the university test. (I don't think it is known how many different strains of rust fungus there are that can attack the foliage of daylilies.)

I have however obtained several (both tets and dips) that have a 1.0 rust resistance rating and the foliage looks amazing to me. (Of course those gardeners in the northern states would probably laugh because they typically see only nice foliage.) I probably have enough rust resistant cultivars to dismiss getting any more for breeding purposes. I must be getting serious in my hybridizing efforts because I do a pedigree search now of all daylilies BEFORE I consider acquiring them. If there are not good rust resistant genes in it's pedigree, then they get removed from my list .... unless of course there is some genetics that I really want .... you know .... those patterned faces and big, bold eyes. I hunted down and got a number of rust resistant cultivars without breaking my budge to start using them as parents in my rust resistant breeding program. Now it's wait time until Spring ...... which requires the patience of a saint in anticipation of bloom season to return. Whistling Whistling Whistling 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
Name: Leslie
Chapin, SC (Zone 7b)
"As for me and my house, we will se
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Lalambchop1
Sep 20, 2015 7:04 AM CST
Someone told me that plants can respond to rust differently in different years. Has anyone found this to be true? I hate to get rid of something because it was rusty one year if it wasn't going to be consistently so.
Leslie

As for me and my house, we will serve the Lord. Joshua 24:15
Name: Becky
Sebastian, Florida (Zone 10a)
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beckygardener
Sep 20, 2015 7:47 AM CST
Leslie - I have often wondered that too. Last year my daylilies looked awful. This year many do have rust, but not as bad as last year. Same daylilies. I don't know why that would be. And we have had high humidity and lots of rain with warm temps. Perfect conditions for rust to go wild .... yet I haven't seen that happen this year at all.
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
Name: Betty
Bakersfield, CA
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Betja
Sep 20, 2015 10:53 AM CST
I have a plant of XYLOPHONE JAZZ that for some reason became covered with rust and I simply could not get rid of it. So I ended up doing something that was extreme, but Guy Pierce said he does this whenever he sees a plant with rust -- I cut it back to the ground! And lo and behold, it came back with absolutely no rust! That was at least three years ago, and my XYLOPHONE JAZZ has never had rust since, so that is what I will do if I find it agaiin.

Betty
Name: Leslie
Chapin, SC (Zone 7b)
"As for me and my house, we will se
Celebrating Gardening: 2015 Keeps Sheep Daylilies Irises Hostas Hybridizer
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Lalambchop1
Sep 20, 2015 3:45 PM CST
I'd forgotten about cutting down to the ground. I've done that too. It works. You have to make sure to clean your scissors between plants or you could transfer it from plant to plant as you go. When rust first appeared in the early 90's some of the the nurseries had to cut all their plants down.
Leslie

As for me and my house, we will serve the Lord. Joshua 24:15
Name: Larry
Enterprise, Al. 36330 (Zone 8b)
Region: Alabama Composter Garden Photography Garden Ideas: Master Level Plant Identifier Celebrating Gardening: 2015
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Seedfork
Sep 20, 2015 4:35 PM CST
I don't have much experience to base my observations on, but one year when I added a lot of new plants from my Mom's after she passed away, many of the plants ended up getting rust that year. The next year after a very cold winter here (for zone 8b) I had almost zero rust. None, till the fall and then very little on any of the plants. This year I have again added lots of new plants and now in the fall I have many of them showing rust.
I don't plan on getting rid of any of them for a few years, but plan to observe them and take notes on which ones do get bad rust and which ones don't. If I see the same plants are susceptible year after year I might get rid of them. If I see that there are seasons of little rust, or that the plants vary as to which ones get rust or not , then I will just have to learn to either live with it or start spraying for rust.
I was surprised that many of the new rust resistant varieties I added this year have more rust than some that are not "listed as rust resistant". The worst cases of rust are actually on just a few of the "not listed as rust resistant" plants.
Name: Sue
Ontario, Canada (Zone 4a)
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sooby
Sep 20, 2015 5:28 PM CST
Lalambchop1 said:Someone told me that plants can respond to rust differently in different years. Has anyone found this to be true? I hate to get rid of something because it was rusty one year if it wasn't going to be consistently so.


Plant fungal diseases are dependent on the environment and since different years can have different weather patterns, this will affect the incidence and severity of diseases such as rust. As an example, if you have a susceptible daylily in your house where there is no dew, fog, rain etc. so the leaves are never wet, you can totally cover it with rust spores but it will not get the disease. This is because rust spores need a minimum number of hours of leaf wetness at the same time as suitable temperatures in order to germinate. Of course this scenario won't happen outdoors, but some years and seasons are wetter, drier, cooler, hotter, windier etc. than others and this directly impacts such diseases.

This is why it is usually recommended to avoid overhead watering or, if you cannot avoid it, don't water in the evening or overnight because that prolongs the time that there is water on the leaves allowing spores to germinate.

One of the concepts in plant pathology is what is called the "disease triangle", where one side of the triangle represents the host plant, another side represents the pathogen, and the third side represents the environmental conditions. If any one of these factors is missing, e.g. the host plant is not susceptible, the pathogen is not present, OR the environment does not favour the disease, it will not occur. If any are limited, a small amount of disease may occur. If the host is very susceptible, there is plenty of the pathogen, and the environment is very conducive to the disease, then you'll have a bad case of rust.

There's an example diagram of the disease triangle on this page:
http://www.gocorn.net/v2006/Insects/articles/Best%20way%20of...



Name: Mayo
The Netherlands, Europe (Zone 9a)
Region: Europe Cat Lover Daylilies Irises Dog Lover Hellebores
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Mayo62
Sep 21, 2015 3:23 AM CST
I didn't have any rust this year Thumbs up
Hopefully that means there are no spores in my plants Whistling

Is it clear what combo of temps / rainfall (or moment of watering?) / humidity trigger rust?
Perhaps my summers are just not hot enough to get rust? Sticking tongue out


Mayo
a DL flower a day keeps the doctor away
Name: Fred Manning
Lillian Alabama

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spunky1
Sep 21, 2015 5:32 AM CST
I will always get a small amount of rust in the fall and have since the big outbreak in 2001 when we all had to cut everything back to the ground. Since then I have had a spray program to keep it to a minimum and only see a little in the fall.
Name: Larry
Enterprise, Al. 36330 (Zone 8b)
Region: Alabama Composter Garden Photography Garden Ideas: Master Level Plant Identifier Celebrating Gardening: 2015
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Seedfork
Sep 21, 2015 9:13 AM CST
Being we have a thread devoted to rust talk, I decided to go out and take some photos of my most rust prone daylilies at the moment. Usually this is about the worst time of year for me with rust.
'Tuscawilla Tigress'
Thumb of 2015-09-21/Seedfork/58fc87 Thumb of 2015-09-21/Seedfork/aaf4b5
'Awesome Blossom'
Thumb of 2015-09-21/Seedfork/cccdeb
'Darla Anita'
Thumb of 2015-09-21/Seedfork/45c050
'Mexican Sunrise'
Thumb of 2015-09-21/Seedfork/44fdee
'As Time Goes By'
Thumb of 2015-09-21/Seedfork/87f3b4
'Spacecoast Tiny Perfection'
Thumb of 2015-09-21/Seedfork/4e34e6
'Red Volunteer' more rust than I was expecting
Thumb of 2015-09-21/Seedfork/205aff
'Malaysian Monarch'
Thumb of 2015-09-21/Seedfork/62fdca Thumb of 2015-09-21/Seedfork/74d40d
'Pallaidian Pink'
Thumb of 2015-09-21/Seedfork/3fa6e1
There were others showing rust but the ones above were the worst cases of rust I have so far.

[Last edited by Seedfork - Sep 21, 2015 9:30 AM (+)]
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Name: pam
gainesville fl (Zone 8b)
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gardenglory
Sep 21, 2015 10:28 AM CST
I have found that the bigger and the healthier the plant is in general, the less rust it will have. If you have a struggling SF, and it gets rust, I would hardly say it was prone to rust, until you could get the plant bigger and then see what happens. I too, have rust on different plants, different years. The weather also plays a big role.
Last year was the year I sprayed round up on all my plants, and had to cut them all down to the ground. I think it sure helped the plants, Im going to do some cutting back this year as well.
Name: Leslie
Chapin, SC (Zone 7b)
"As for me and my house, we will se
Celebrating Gardening: 2015 Keeps Sheep Daylilies Irises Hostas Hybridizer
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Lalambchop1
Sep 21, 2015 11:18 AM CST
You sprayed round up on your plants???
Leslie

As for me and my house, we will serve the Lord. Joshua 24:15
Name: Mayo
The Netherlands, Europe (Zone 9a)
Region: Europe Cat Lover Daylilies Irises Dog Lover Hellebores
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Mayo62
Sep 21, 2015 11:31 AM CST
Lalambchop1 said:You sprayed round up on your plants???


yes, I was wondering about that too..
Doesn't kill Round Up all plants...? Confused

@Seedfork
Larry, if that is the worst rust can do to Daylilies, I think nobody would worry about it Thumbs up


Mayo
a DL flower a day keeps the doctor away
Name: pam
gainesville fl (Zone 8b)
Bee Lover Dragonflies Cut Flowers Dog Lover Cat Lover Enjoys or suffers hot summers
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gardenglory
Sep 21, 2015 11:50 AM CST
Stupidity, sheer stupidity. Blinking
Name: Mayo
The Netherlands, Europe (Zone 9a)
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Mayo62
Sep 21, 2015 11:53 AM CST
I agree Rolling on the floor laughing Rolling on the floor laughing Rolling on the floor laughing
a DL flower a day keeps the doctor away
Name: Vickie
Elberfeld, Indiana, USA (Zone 6b)
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blue23rose
Sep 21, 2015 12:09 PM CST
gardenglory said: Last year was the year I sprayed round up on all my plants, and had to cut them all down to the ground. I think it sure helped the plants, Im going to do some cutting back this year as well.


Wow, I was wondering if I read that right!! I am surprised and also extremely glad that they came back Thumbs up

Larry, the rust does make the plants look raggedy and weary, but fortunately in most cases it doesn't kill them. I wondered at times why we only take pictures of just the blooms, then when I look at some of my foliage, I know why Rolling on the floor laughing Rolling on the floor laughing
Vickie
May all your weeds be wildflowers. ~Author Unknown
Name: Larry
Enterprise, Al. 36330 (Zone 8b)
Region: Alabama Composter Garden Photography Garden Ideas: Master Level Plant Identifier Celebrating Gardening: 2015
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Seedfork
Sep 21, 2015 12:47 PM CST
I really love clean looking foliage, so plants that always look nice and green are a big plus, and those that don't move further down my list. It is just hard trying to figure out which ones will always have nice foliage and which ones will look ratty.

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