I wasn't on ATP for that earlier discussion of rust but I can clarify here a few points from Michelle's quote that Gleni re-posted above:
Yes, copper fungicides were tested on daylily rust a number of years ago, the paper is listed on my daylily rust info site's research articles page (Toxicity of Fungicides to Urediniospores of Six Rust Fungi by That Occur on Ornamental Crops by Mueller) but to quote a bit of it here:
The strobilurin (azoxystrobin and trifloxystrobin), broad-spectrum protectant (chlorothalonil and mancozeb), and inorganic copper (copper sulfate pentahydrate) fungicides were fungicidal to urediniospores of the six rust fungi. However, the benzimidazole (thiophanate-methyl), dicarboximide (iprodione), hydroxyanilide (fenhexamid), and demethylation-inhibiting (myclobutanil, propiconazole, triadimefon, and triflumizole) fungicides were only fungistatic to rust urediniospores.
Available directly here:
http://apsjournals.apsnet.org/...
I don't know where Michelle heard that the spores can travel 60 miles in the wind - rust spores typically do travel on the wind, often even further than this depending on the specific rust or it may be less, but there's been no research to determine how far daylily rust spores specifically can travel.
The term "curative" can be misleading - what it means is
"Early-infection activity: occurs when the active ingredient of a fungicide can
penetrate the plant and stop the pathogen in the plant tissues, usually most
effective
24 to 72 hours after infection occurs , depending on the fungicide .
This type of activity is sometimes referred to as “curative” or “kickback”
activity . Most fungicides that have early-infection activity also have preven-
tative activity and are most effective when applied
before infection occurs."
From:
http://soybeanresearchinfo.com...
Quote from the earlier post: "From what I understand is rust spores need an opening in the foliage to get in so I would suggest actually spraying with some type of contact fungicide even if the person doesn't want to use any other chemicals so the spores that hide in the mulch or anywhere for that matter will be killed. Especially since you just given rust the biggest opening to get in when you cut the foliage."
Daylily rust spores have been shown to enter the plant through the stomata (pores) in the leaf, see:
http://web.ncf.ca/ah748/diagra...
Also quoting from the earlier post: " I have heard that Dawn soap acts as a contact fungicide (I think from Mark Carpenter) but I can't vouch for that. I use Dawn anyway as a spreader/sticker when I spray. It needs to be the regular or I guess they still call it Original Dawn, not the kind that is anti-bacterial or has bleach or other stuff."
The effectiveness of Ultra Dawn dishwashing liquid was discovered during research into daylily rust at the University of Guelph eleven years or so ago, see: Hsiang, T., Cook, S., Zhao, Y. 2004. Studies on Biology and Control of Daylily Rust in Canada. The Daylily Journal, American Hemerocallis Society 59: 47-57.:
http://www.uoguelph.ca/%7Ethsi...
Pretty much a given that I'll put my two cents in on my favourite topics of rust, spring sickness and seeds (if I notice the thread)
and the little violet ground cover.
and her scapes are only now coming up.
to the Daylily Forum! Some beauties! (That last photo looks like you may have thrips - bug pest. Thrips love deep red and deep purple blooms.)
