Daylilies forum: Question: Leaf Streak

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Name: Becky
Sebastian, Florida (Zone 10a)
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beckygardener
Apr 20, 2016 9:10 PM CST
Well, got rid of the thrips and aphids, now I am seeing leaf streak. (sigh) Alway something it seems.

Is there an organic way to treat leaf streak?
What lies behind us and what lies before us are tiny matters, compared to what lies within us.
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Name: shirlee
southeast (Zone 6b)
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mistyfog
Apr 20, 2016 10:20 PM CST
Wondering about leaf streak as well. After a recent hard freeze,
the foliage began to show what looks like leaf streak on the outer
leaves, but maybe it is just freeze damage. Crossing Fingers!

Hubby pulled off the affected leaves very early this morning. That was
my pleasant surprise when I got up. Yeah, he's a keeper. Thumbs up

Leaf streak is the one thing I totally dislike. We have researched it, but
haven't found any organic way to tame the beast, except to pull off the
affected leaves and remove leaf debris late winter before the daylilies begin to grow.
Some say to remove leaf debris in the fall, and we do when adding new mulch, but once the freezing temps begin, there will be plenty of dead leaves to remove no matter what.

I really hate to use fungicides, but may have to resort to that if leaf
streak is noted in a big way, and I'm not as yet certain that fungicides really
help all that much. Hope others have ideas.

[Last edited by mistyfog - Apr 20, 2016 10:24 PM (+)]
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Name: Julie
Roanoke, VA (Zone 7a)
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floota
Apr 21, 2016 4:41 AM CST
Organic doesn't work as well as the other. I use Cleary 3336.
Name: Sue
Ontario, Canada (Zone 4a)
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sooby
Apr 21, 2016 8:22 AM CST
There was some testing of fungicides including bio-products for leaf streak, the fungicide Julie uses was one of the best ones but is not organic. There's a link to the study and also an article on leaf streak from the AHS daylily dictionary page for leaf streak, scroll to the bottom for the links:

http://www.daylilies.org/ahs_dictionary/leaf_streak.html

Another problem that surfaces early in the year is spring sickness, which I've seen mistakenly called leaf streak, so just to differentiate here are some pictures of that (I know that's not what Becky has, but it might be of interest to others who aren't sure what they're seeing):

http://web.ncf.ca/ep568/gallery.html
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
Apr 21, 2016 8:30 AM CST
Clearly, I need some Cleary 3336. Between rust and leaf streak my daylilies are lucky to have a leaf left.
Name: shirlee
southeast (Zone 6b)
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mistyfog
Apr 21, 2016 12:32 PM CST
I think mine is spring sickness after looking at more photos.
Mostly, the foliage looked nice until we had a few freezes.
Name: Sue
Ontario, Canada (Zone 4a)
Daylilies Birds Enjoys or suffers cold winters Native Plants and Wildflowers Butterflies Annuals
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sooby
Apr 21, 2016 12:57 PM CST
It's about the right time for spring sickness, is there any forsythia flowering in your area right now? We tend to use that as a marker. The freezes didn't cause it, spring sickness starts before the shoots emerge, it just takes a while for the damage to grow out to where you can see it. Sometimes this seems to coincide with a freeze, just because of the time of year it happens, but spring sickness happens with or without freezes. Freezing of the leaves can let in the leaf streak fungus and result in yellow and brown leaves but that's not the same thing. For it to be spring sickness there'd be bending, possibly stunting, and brown ragged "saw-tooth" leaf edges.
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Polymerous
Apr 21, 2016 3:19 PM CST
Our winter was very wet here this year (thankfully, as our reservoirs need refilling). This is the first year that I have seen leaf streak on some (newer) plants, and I'm not happy about it. Glare (Nope, no spraying here.)

Just as with badly rust susceptible plants, badly leaf streak susceptible plants mostly get the boot here.
The current avatar image is that of a volunteer daylily seedling showing cristation.
Name: shirlee
southeast (Zone 6b)
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mistyfog
Apr 21, 2016 6:22 PM CST
Sue, the forsythia has been past bloom for some time. It blooms with the
daffodils. Then, we see flowering trees, and flowering shrubs are the next phase
of bloom which is about to peak. Iris is just beginning. However, that's very
interesting that forsythia is a marker for spring sickness. I've just learned
something new. The forsythia here is quite old though, not a hybrid, so that may have something to do with the timing.

I do see brown saw-toothed edges with the middle new growth flopping over
which is easy to pull out of the daylilies. Some twisting of the foliage as well. I do believe it is spring sickness. If the weather continues to warm, the plants tend to
grow out of the effects of spring sickness. That's what I've noticed in prior years for
this particular malady.

On some, the oldest leaves, the ones near the ground do look like leaf streak, but are
probably just dying leaves that have been subjected to freeze. If a fungus becomes
apparent, even though I detest using fungicides, I will do so.

I looked into some of the fungicides, and some of the labels read like scary stuff.
So, I think we will stick with Daconil which may work only as a preventive rather than a
cure, but it seems to be safer since the label states it can be used on edibles though
I wouldn't want to use it on edibles.



[Last edited by mistyfog - Apr 22, 2016 9:52 AM (+)]
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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
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beckygardener
Apr 21, 2016 8:10 PM CST
Thanks for the comments. I have to agree with Larry .... after pulling so many leaves due to rust and leaf streak, my poor plants look kinda sparse. But it does help keep them from becoming too crowded allowing more air flow between them. Rolling my eyes. Whether they have enough energy stored to produce blooms this year is yet to be seen.

Seems overhead watering is part of the problem for both rust and leaf streak. I guess I need to consider soaker hoses throughout my daylily raised beds instead of micro-sprinklers OR do the watering in the middle of the day so the foliage dries quickly.

I checked out the Cleary 3336 and it is quite expensive. I don't know if I want to spend the money and add chemicals to my garden. I am not keen on doing that at all. This is such a dilemma for me.

Sue - Thanks for the links on leaf streak and Spring Sickness. I've had Spring Sickness too on a few daylilies, so I do know what that looks like as well.

All I can wonder is .... is there anything at all that I DO NOT get here that attacks my daylilies? Sighing!

Sue also mentioned a link to leaf-streak resistant daylily cultivars on this post on another thread that I read:
https://etd.ohiolink.edu/!etd.send_file?accession=osu1303143...

I do have Siloam Double Classic (on the list for both rust resistance and leaf streak resistance .... or at least that is how I understood it to be) and it does hold up well to a lot of ailments known to attack daylilies in my own garden. I think I need to get Buttered Popcorn, too, and a few others and use them in my breeding program. Maybe using some of these resistant cultivars with others would create some seedlings with nice foliage year round? My breeding ideas are getting narrower and more singularly focused. So complicated to get a nice daylily to grow here in the south without chemical treatments.
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
[Last edited by beckygardener - Apr 21, 2016 8:57 PM (+)]
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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
Apr 21, 2016 8:18 PM CST
Buttered Popcorn shows rust pretty bad in my garden.
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
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beckygardener
Apr 21, 2016 8:35 PM CST
Hmmmm .... bummer. Well, then I should strike that one off my list. I have several that seem to show some pretty good-looking foliage:

Dips:

Siloam Double Classic
Jedi Brenda Spann
Beautiful Edgings
Lady Neva
Gleber's Top Cream
Fol de Rol
Purple Rain Dance
Paige's Pinata
Wild One

Tets:

Chinese Scholar
Mister Lucky
Whooperee

As well as some of my seedlings, which I am quite happy to see! Some of my newest acquired daylilies are too new to evaluate yet, but I will be watching them closely to see which ones might be showing rust and leaf streak resistance.

Those resistant will be my top breeders. Breed with each other and other cultivars to create children with healthy looking foliage!

Now this is not to say that these cultivars might not develop issues at a later date. But right now, they are looking pretty decent as far as rust and leaf streak are concerned. That is a dozen cultivars out of over 70. Of the others, many are indeed showing some resistance, but not as good as I had hoped. I am dreaming of rust resistant 1.0 cultivars and seedlings. Crossing Fingers!
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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