North Florida Daylily Society
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Click here to find Daylily Source locations and here to find Display Gardens
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Plant Problems
There is currently much interest in the prevention and elimination of daylily rust. This problem first appeared in the summer of 2001 in Florida. Programs by individual hybridizers and interested individuals have blossomed. Some report success but no single treatment program has been developed. The single most followed prevention method has been to maintain an extreme diligence when adding additional stock to individual collections.
Listed below are some links to identify some common daylily foliage problems and known chemical compounds for treatment programs. Additional information will be posted as it becomes available.
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Foilage Problems |
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| Daylily Spring Sickness | Home Application of Fungicides | ||
| Leaf Streak | K-Phite (Crown Rot) see also Plant Food Systems | ||
| Daylily Rust Info Page | National Plant Board | ||
| Daylily Rust Michigan State University | Florida Dept of Agriculture and Consumer Services | ||
| AHS Daylily Rust Page | |||
| Ammonia | |||
| Bleach | |||
| Pest Control Chemicals | |||
| Pesticide Info | Bifen L/P - insect control | Malathion | |
| Pesticide Labels (Alabama/Auburn Univ. | Insecticidal Soap | ||
| Weed Problems | |||
| Weeds of the Southern United States* | Common Weed Seedlings of the U.S. and Canada* | ||
| Weeds of the Southern United States Part II* | Turf Herbicide Families and their characteristics* (for the Technical Types) | ||
| Preen | |||
| Growth Promoters | |||
| Nickel Plus | Messenger | BAP-10 | |
|
Families
of Fungicides |
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|
Chemical
Family:
Dithiocarbamates |
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|
Common
Name |
Trade
Names1 |
Mode
of Action |
Placement/Mobility |
Concern
Over |
Comments |
|
Mancozeb |
Fore,
Mancozeb, Dithane T/O, Protect T/O |
General |
Contact |
Low |
These
types of fungicides have broad-spectrum control properties and are used as
protectants. Early development of these started in the 1930s. |
|
Thiram |
Spotrete |
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|
Chemical Family:
Dicarboximides |
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|
Iprodione |
Chipco
26019, Chipco 26GT, Iprodione Pro, 18 Plus |
Specific |
Local
Penetrant |
Moderate
to High |
The
dicarboximides were developed in the mid-1970s. These fungicides have
broad-spectrum activity. |
|
Vinclozolin |
Touche,
Curalan |
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|
Chemical Family:
Benzimidazoles |
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|
Thiophanate-methyl |
Fungo
50, Cleary’s 3336, Tmethyl Pro, T-Storm |
Specific |
Systemic
(upward) |
High |
This
family of fungicides became available in the late 1960s and ushered in the
era of systemic fungicides. The development of resistance to the
benzimidazoles is a serious problem |
|
Chemical Family:
Sterol Inhibitors or Demethylase Inhibitors |
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|
Fenarimol |
Rubigan |
Specific |
Systemic
(upward) |
High |
This
group of fungicides was introduced in the late 1970s and has
broad-spectrum activity. At times, referred to as the SIs or DMIs. The
development of resistance to this family of fungicides is a serious
problem. |
|
Fenarimol |
Rubigan |
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|
Myclobutanol |
Eagle |
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|
Triademefon |
Bayleton,
Accost |
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|
Propiconazole |
Banner
MAXX, Spectator, Propiconazol
Pro |
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|
Chemical Family:
Strobilurins |
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|
Azoxystrobin |
Heritage |
Specific |
Systemic
(upward) |
Moderate
to High |
First
product available in 1997. The chemical structures are found in various
naturally occuring, wood destroying fungi. Broad-spectrum disease
management chemical tools. |
|
Trifloxystrobin |
Compass |
Specific |
Local
Penetrant |
Moderate
to High |
|
|
Additional Fungicides...
each
is in a different chemical family |
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|
Chlorothalonil |
Daconil,
Manicure, Concorde, Echo |
General |
Contact |
Low |
Listed
are other important fungi- cides. Some give broad-spectrum control. Since
these compounds represent different chemical groups, they are placed
together here. Chlorothalonil is a protectant
fungicide, PCNB is usualy considered to be a protectant but may be locally
systemic. |
|
Flutolanil |
ProStar |
Specific |
Systemic
(upward) |
Low |
|
|
PCNB (pentachloroni- trobenzine) |
Terrachlor,
Turfcide, Revere, FFII, PCNB, Defend, Engage |
General |
Contact |
Low |
|
|
Fludioxonil |
Medallion |
Specific |
Contact |
Moderate
to Low |
|
|
Chemical Family:
Sterol Inhibitors or Demethylase Inhibitors |
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|
Mefenoxam |
Subdue
MAXX Apron
(seed
treatment only)
|
Specific |
Systemic
(upward) |
High |
Few
diseases besides those caused by Pythium species or closely related water
molds (Oomycetes) like yellow tuft, are controlled. Azoxystrobin
(Heritage) is unique with activity against both Pythium species and the
fungi. Fosetylaluminum is a true systemic, exhibiting both upward and
downward movement in plants. It is also unique in that it moves in the
phloem (symplastic transport) as compared to all other systemic fungicides
that are transported in the xylem (apoplastic transport). |
|
Propamocarb |
Banol |
Not
well known |
Systemic
(upward) |
Low |
|
|
Fosetyl-Aluminum |
Prodigy, Chipco Signature (Aliette) |
Not
well known |
Systemic
(upward & downward) |
Low |
|
|
Azoxystrobin |
Heritage |
Specific |
Systemic
(upward) |
Moderate
to High |
|
|
Chloroneb |
Teremec
Sp |
General |
Contact
(local penetrant) |
Low |
|
|
Ethazol
(Etridiazol) |
Koban,
Terrazole |
General |
Contact |
Low |
|
1 Product
list by trade name may not be all inclusive
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