UW Soybean Plant Health
Paul Esker, Craig Grau, and Bryan Jensen, Department of Plant Pathology and Integrated Pest Management Program. UW-Madison. Published in the Wisconsin Crop Manager, January 16, 2008
Since 2005, numerous foliar fungicides were labeled for use in soybean, primarily as a result of the introduction of Asian soybean rust into the U.S. While many of these products have since been approved for a Section 3 label, indicating that EPA has approved their use throughout the U.S., others have not, and their Section 18 labels have expired as of November 10, 2007. The expiration date was after the publication of Pest Management in Wisconsin Field Crops-2008 (A3646), available through UW-Extension, and we felt that it was important to provide a summary update regarding these changes.
Currently, if you have any unopened canisters of material for products under the Section 18 label, they should be returned to the distributor and not used on soybean. The return requirement is only if the application of the fungicide was for soybean, as these fungicides may be used on other approved crops.
Table 1: Current fungicide products approved for soybean under Section 3.
| Trade Name | Active Ingredient |
Chemical Group |
Other soybean diseases controlled |
Preharvest Interval |
|---|---|---|---|---|
| Bravo® Weather Stik (Syngenta) |
chlorothalonil |
chloronitrile |
Anthracnose, Cercospora leaf blight, Diaporthe pod and stem blight, Frogeye leaf spot, purple seed stain, Septoria brown spot,, stem canker | 6 weeks |
| Echo 720®, Echo 90 DF, Echo Zn (Sipcam Agro) |
chlorothalonil |
chloronitrile |
Anthracnose, Cercospora leaf blight, Diaporthe pod and stem blight, Frogeye leaf spot, purple seed stain, , Septoria brown spot , stem canker | 42 days |
| Headline® (BASF) | pyraclostrobin |
strobilurin |
Alternaria leaf spot, Anthracnose, brown spot, Cercospora leaf blight, Frogeye leaf spot, Pod and stem blight, Rhizoctonia aerial blight, Southern blight (suppression only) | 21 days |
| Quadris® (Syngenta) | azoxystrobin |
strobilurin |
Alternaria leaf spot, Anthracnose, Cercospora leaf blight, Septoria brown spot, frogeye leaf spot, Pod and stem blight | 14 days |
| Stratego (Bayer Crop Science) |
propiconazole, trifloxystrobin |
triazole and strobilurin |
curative and protectant |
Do not apply later than growth stage R5 |
Preventative + Curative |
||||
| Domark 230 ME (Isaro S.p.A.) |
tetraconazole |
triazole |
protectant and curative |
Do not apply later than growth stage R5 |
| Quilt (Syngenta) |
azoxystrobin, propiconazole |
strobulirin and trizole |
protectant and curative |
Do not apply later than growth stage R5 |
| Tilt (Syngenta) |
propiconazole |
triazole |
curative and protectant |
Do not apply later than growth stage R5 |
Table 2. Current products that were approved under Section 18 for soybean and have expired as of November 10, 2007.
| Trade Name | Active Ingredient |
Chemical Group |
Activity |
Preharvest Interval |
|---|---|---|---|---|
| Bumper EC (Makhtshim Aga of North America) |
propiconazole |
triazole |
curative |
Do not apply later than growth stage R5 |
| Folicur (Bayer Crop Science) |
tebuconazole |
triazole |
curative and protectant |
30 days |
| Headline SBR (BASF) |
pyraclostrobin, tebuconazole |
strobulirin and trizole |
curative and protectant |
30 days |
| Laredo EC, EW (Dow AgroSciences) |
myclobutanil |
triazole |
protectant and curative |
28 days |
PropiMax |
propiconazole |
triazole |
curative |
Do not apply later than growth stage R5 |
For further information regarding the status of any of these products, as well as what crops and diseases they are currently labeled for, there is the searchable database through the Wisconsin Department of Agriculture, Trade and Consumer Protection. Also, for specific recommendations regarding the application of the Section 3 products on soybean, please consult Pest Management in Wisconsin Field Crops-2008 (online as a pdf file) or obtain a print copy from UWEX Publications - ask for UWEX No. A3646.
Read more about soybean rust fungicides in Wisconsin»
Information from this site can be copied and distributed for educational use. Please credit the source with our name and URL: University of Wisconsin-Madison, Departments of Agronomy, Entomology, and Plant Pathology at www.plantpath.wisc.edu/soyhealth.