Daylily – Rust
Q: What can you tell me about the sad, ugly rust infecting our wonderful daylilies?
A: This summary from the American Daylily Society gives detailed information.
Note the fungicide info.: “daylily rust can be controlled under greenhouse conditions by fungicide applications,
in particular, mancozeb, chlorothalonil (click for sources), azoxystrobin and triadimefon.
Products should be rotated to reduce the risk of fungicide resistant races of the rust developing. Alternate between a systemic fungicide and a contact or protectant fungicide. Application may need to be repeated as often as every seven to fourteen days – follow product label instructions.”
Here some homeowner fungicide products:
Banner Maxx = propiconazole
Bayer Advanced Fungus Control for Lawns = triadimefon (Bayleton)
Bayer Advanced Garden Disease Control
for Roses, Flowers & Shrubs Concentrate = tebuconazole (Elite, Folicur)
Bonide Captan = captan
Bonide Fung-onil Concentrate = chlorothalonil
Bonide Fung-onil = Bayleton (2001 label)
Bonide Fung-onil Multi-Purpose Fungicide = chlorothalonil (2002 label)
Bonide Fung-onil Lawn Disease Control = Bayleton (2002 label)
Fertilome Halt Systemic Fungicide = thiophanate-methyl
Green Light Mancozeb = mancozeb
Green Light Fung-Away Fungicide = Bayleton (not labeled for lawns)
Green Light Fung-Away Systemic Spray = Bayleton (labeled for lawns)
Green Light Fung-Away II Systemic Lawn Fungicide (2 oz jar) = hiophanate-methyl (Cleary’s 3336, Topsin-M)
Green Light Fung-Away Systemic Granules = myclobutanil
Hi-Yield Copper Fungicide = copper hydroxide
Monterey Aliette = aluminum tris (O-ethyl phosphonate)
Ortho Funginex = triforine
Ortho Garden Disease Control = chlorthalonil
Ortho Rose Pride Rose & Shrub Disease Control = triforine
Scott’s Lawn Fungus Control = thiophanate-methyl
Spectracide Immunox(liquid) = myclobutanil
Spectracide Immunox(granular) = myclobutanil
Daconil = chlorothalonil