Daylilies forum→Rust Resistance

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Name: Susan
Virginia (Zone 8a)
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virginiarose
Jan 15, 2013 8:52 PM CST
I forgot about the Nickel Plus. I heard that name before. I am confused about group 11 and group 3. The Bayleton 50 is $199.99 on Amazon. I also like the Indicate 5, sounds fool proof! (that's for me) Plus a teaspoon per gallon would last a long time. Probably as long as the Cabrio. I wonder how much of the Bayleton 50 do you need, how long does that last? So far the Indicate 5 sounds like the best deal but only if it is as good as you say. One gallon is 51.99. I think I found the Nickel Plus for 21.00 per quart, how much do you need of that? It can be used as a fungicide plus it fertilizes, so use in spring. Ok! Also, do I need to choose several of these and alternate the fungicides? I'm all ears!
Consider the lilies of the field, how they grow; they toil not, neither do they spin: And yet I say unto you, That even Solomon in all his glory was not arrayed like one of these. Mat.6:28-29
Name: Michele
Cantonment, FL zone 8b
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tink3472
Jan 16, 2013 7:11 AM CST
Susan, the Nickel Plus is 1 Tbs per gallon; spray once a week for 3 weeks then every 14 days until blooms begin then start again in fall.


The different group numbers/letters are basically a way to tell the different fungicides (or other chemicals) from each other so you don't alternate with the same fungicide group. You are supposed to alternate with a minimum of 2 different group numbers to keep from building up resistance. They have different modes of action.

Example: the ortho rose pride (triforine), Bayer advanced disease control (tebuconazole), Spectracide immunox ( myclobutanil) that was mentioned in the earlier post are ALL group 3 fungicides so you wouldn't want to use only these.
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[Last edited by tink3472 - Jan 16, 2013 8:43 AM (+)]
Give a thumbs up | Quote | Post #346256 (2)
Name: Susan
Virginia (Zone 8a)
God is the only thing that matters.
I was one of the first 300 contributors to the plant database! Garden Ideas: Level 1 Avid Green Pages Reviewer Hibiscus Dragonflies Daylilies
Bee Lover Dahlias Butterflies Hostas Birds Lilies
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virginiarose
Jan 16, 2013 7:56 PM CST
Ok, that is what I was thinking. How many groups are there? two? So I rotate group 3 and group 11? How can I know what is in the groups. I looked up a few of these on Lowes.com and they do not tell you what group they are in. Argh!!!
Consider the lilies of the field, how they grow; they toil not, neither do they spin: And yet I say unto you, That even Solomon in all his glory was not arrayed like one of these. Mat.6:28-29
Name: Michele
Cantonment, FL zone 8b
Seller of Garden Stuff Region: United States of America Pollen collector Dragonflies I was one of the first 300 contributors to the plant database! Region: Florida
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tink3472
Jan 16, 2013 8:48 PM CST
There are 42 number groups of fungicide plus 4 letter ones which are then grouped by letter and number. The professional products have the groups numbers on them, but unfortunately the home gardener products do not. Now kerp in mind that these are ALL types of fungicides not just the ones for rust so don't rack your brain looking for all of them. Most things I have read for rust are these groups: 1, 11, 7, 3 (systemic) and M (contact).
The contacts don't have to be rotated just the systemics from what I understand.

Here is a link to the different codes. It has the class number/letter, group name, chemical name, and common name plus other stuff. If you know the active chemical ingredient in the product just look on the site for it and then you will know what group it's in.
http://ipm.ifas.ufl.edu/resour...
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[Last edited by tink3472 - Jan 16, 2013 10:09 PM (+)]
Give a thumbs up | Quote | Post #346535 (4)
Name: Susan
Virginia (Zone 8a)
God is the only thing that matters.
I was one of the first 300 contributors to the plant database! Garden Ideas: Level 1 Avid Green Pages Reviewer Hibiscus Dragonflies Daylilies
Bee Lover Dahlias Butterflies Hostas Birds Lilies
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virginiarose
Jan 16, 2013 9:32 PM CST
Thanks Tink! I tip my hat to you.
Consider the lilies of the field, how they grow; they toil not, neither do they spin: And yet I say unto you, That even Solomon in all his glory was not arrayed like one of these. Mat.6:28-29
Name: Michele
Cantonment, FL zone 8b
Seller of Garden Stuff Region: United States of America Pollen collector Dragonflies I was one of the first 300 contributors to the plant database! Region: Florida
Birds Butterflies Container Gardener Hummingbirder Garden Ideas: Level 2 Hosted a Not-A-Raffle-Raffle
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tink3472
Jan 16, 2013 10:10 PM CST
I tip my hat to you.
www.pensacoladaylilyclub.com
Name: Michele
Cantonment, FL zone 8b
Seller of Garden Stuff Region: United States of America Pollen collector Dragonflies I was one of the first 300 contributors to the plant database! Region: Florida
Birds Butterflies Container Gardener Hummingbirder Garden Ideas: Level 2 Hosted a Not-A-Raffle-Raffle
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tink3472
Jan 16, 2013 10:18 PM CST
Susan here's the 2012 code list
http://www.frac.info/publicati...

I like the other one better because it goes in number order where the newer one doesn't. It has more fungicides added to it (not necessarily for rust)

And here's the 2012 list that gives common name first
http://www.frac.info/publicati...
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[Last edited by tink3472 - Jan 16, 2013 10:21 PM (+)]
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Name: Doris&David Bishop
Cartersville, Ga. (Zone 7b)
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Casshigh
Jan 16, 2013 10:52 PM CST
Michele, you are a fountain of information! Where would we all be without you here??? Sure am glad that you are here!!! Hurray! Hurray! Hurray!
"Anything worth doing is worth overdoing"~~~David Bishop
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Name: Juli
Ohio (Zone 6a)
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daylily
Jan 17, 2013 12:18 AM CST
Casshigh said:Michele, you are a fountain of information! Where would we all be without you here??? Sure am glad that you are here!!! Hurray! Hurray! Hurray!


I agree

I tip my hat to you.
Name: Susan
Virginia (Zone 8a)
God is the only thing that matters.
I was one of the first 300 contributors to the plant database! Garden Ideas: Level 1 Avid Green Pages Reviewer Hibiscus Dragonflies Daylilies
Bee Lover Dahlias Butterflies Hostas Birds Lilies
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virginiarose
Jan 17, 2013 5:20 AM CST
I agree Hurray! Green Grin! Thumbs up Lovey dubby ( Thanks a bunch!) I tip my hat to you.
Consider the lilies of the field, how they grow; they toil not, neither do they spin: And yet I say unto you, That even Solomon in all his glory was not arrayed like one of these. Mat.6:28-29
Name: Michele
Cantonment, FL zone 8b
Seller of Garden Stuff Region: United States of America Pollen collector Dragonflies I was one of the first 300 contributors to the plant database! Region: Florida
Birds Butterflies Container Gardener Hummingbirder Garden Ideas: Level 2 Hosted a Not-A-Raffle-Raffle
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tink3472
Jan 17, 2013 9:51 AM CST
*Blush* someone else would have found it to post I'm sure, but thank you for your comments
www.pensacoladaylilyclub.com
Name: Susan
Virginia (Zone 8a)
God is the only thing that matters.
I was one of the first 300 contributors to the plant database! Garden Ideas: Level 1 Avid Green Pages Reviewer Hibiscus Dragonflies Daylilies
Bee Lover Dahlias Butterflies Hostas Birds Lilies
Image
virginiarose
Jan 17, 2013 10:47 AM CST
YOUR... Welcome!


I like the other one too, I got it bookmarked. Green Grin!
Consider the lilies of the field, how they grow; they toil not, neither do they spin: And yet I say unto you, That even Solomon in all his glory was not arrayed like one of these. Mat.6:28-29
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
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philljm
Jan 17, 2013 6:21 PM CST
I agree Wonderfu information Michelle, thanks ~j

Alligator1962
Jan 17, 2013 8:45 PM CST
I'm still here. This is a great discussion.

Mark.
Name: shirlee
southeast (Zone 6b)
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mistyfog
Jan 17, 2013 10:17 PM CST
Thank you Michele for the info. Something that I have been delving into
in recent days. Your source is so much better than the ones I have seen. Thumbs up

Name: Tina
Where the desert meets the sea (Zone 9b)
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chalyse
Feb 16, 2013 1:32 PM CST
At the bottom of each daylily cultivar's database page there is a link (called "Read our note about daylily rust scores") that explains how daylily rust scores were derived from averaging the scores collected over the years by university scientists who were funded and supported by AHS in their research on daylily rust. Citations are provided to the data and research used in those averaged scores.

Since the decimal scores (1, 1.1, etc) are averages arrived from scientific data over a number of controlled observations, any individual's change to the rating would only reflect rust in their own "back yard" so to speak. Depending on how a lay-person interprets their experience, a plant's condition, and how scores should be defined, changing the decimal number would likely skew the research data to the point of being useless (that is, its an averaged result of years of research, not a running tab of any individuals).

Here's the explanation listed in the link at the bottom of every daylily cultivar's page, as mentioned above:

Scientifically cited, succinct, and easiest-to-read explanation and sub-links (as well as the source for the links to much of the published research below): Sue Bergeron's site (2011-2012 AHS member of Committees on Educational Outreach and Scientific Studies)

http://web.ncf.ca/ah748/rust.h...

2) What is being seen in the decimal-number ratings:

A meta-analysis rating of an average score obtained across all scores for the cultivars studied in the noted research. In other words, an average of the already-averaged scores from all the sources.

3) What these general numbers mean, as borrowed from the research reports from the sources listed further below:

1 - No visible signs of rust (termed 'shows resistance' and 'shows vertical resistance' in scientific literature)
2 - Slight amount of visible rust, determined by percentage of foliage covered in rust pustules (termed 'shows resistance' and 'shows horizontal resistance' in scientific literature)
3 - Moderate amount of visible rust, determined by percentage of foliage covered in rust pustules (termed 'shows susceptibility' in scientific literature)
4 - Heavy amount of visible rust, determined by percentage of foliage covered in rust pustules (termed 'shows susceptibility' in scientific literature)
5 - Complete rust infestation, determined by percentage of foliage covered in rust pustules (termed 'shows susceptibility' in scientific literature)

4) Where the data comes from (published databases and scientific literature sources):

2012 University of Georgia and Ibaraki University (Japan), James W. Buck (Ph.D., Plant Pathology, Univ. Wisconsin-Madison), Yoshitaka Ono (Ph.D., Agricultural Science, Purdue University).

2007 USDA Report, Y. H. Li (Ph.D., Plant Pathology, University of Arkansas) , M. T. Windham (Ph.D., Plant Pathology, North Carolina State University), and R. N. Trigiano (PhD., Plant Pathology and Botany, North Carolina State University), D. C. Fare (Ph.D.,Agronomy and Soils, Auburn University), United States Department of Agriculture.

2005 University of Arkansas, Rust Obersvations, Allen Owings (Ph.D., Horticulture, Mississippi State University), Gordon Holcomb (Ph.D., University of Wisconsin, Madison).

Circa 2003: from links page: http://web.ncf.ca/ah748/rust.h... - Congregate observations (correlated with university field observation research data) in four performance categories converted to university researcher's 5.0 scale using weighted averages.

2002 University of Georgia, Department of Plant Pathology, Daren S. Mueller (Ph.D, Plant Pathology at University of Illinois at Urbana-Champaign), Jean L. Williams-Woodward (Ph.D., Plant Pathology, University of Minnesota), James W. Buck, Department of Plant Pathology (Ph.D. Plant Pathology, Univ. Wisconsin-Madison).

2002 Rust Score Report, Cornell University, Karen Snover-Clift (M.S. Plant Pathology, Cornell University), Director of the Cornell University Plant Disease Diagnostic Clinic of the Department of Plant Pathology.

2001 Field Research, University of Arkansas, James A. Robbins (Ph.D., Environmental Horticulture, University of California, Davis) and Steve Vann (Ph.D., Plant Pathology, Texas A & M).
Do not seek to follow in the footsteps of old; seek what those of old sought. — Basho

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Rusty98
Nov 9, 2017 1:46 PM CST
Are there any updates to this thread. I am having a terrible time in Miami. I have tried finding cultivars that are resistant to rust using some of the publications I have found on the internet, and at least half that I have tried (about 5) have developed rust here. All of my fancier cultivars (generally tetraploids) have died. I have resorted to various species of Hemerocallis, which at least survive although they may not flower regularly.
Name: Marilyn, aka "Poly"
South San Francisco Bay Area (Zone 9b)
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Polymerous
Nov 19, 2017 4:02 PM CST
Do a search of the database, for daylilies that have a rust resistance score of 1.0, or close to it. Those might be your best bet. Unfortunately, they won't have fancy faces... but you could always try hybridizing your own, by crossing a fancy face you like with a rust resistant daylily that is ploidy and color compatible.

(Are you sure it was the rust that did in the daylilies.... I don't think I have ever lost a daylily to rust, but I have lost several due to rot.)
Evaluating an iris seedling, hopefully for rebloom

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