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Issue No. 3, Article 6/April 13, 2007

Field Crop Fungicide Update

Three new fungicides have been registered since the 2006 growing season:

  • Trilex AL (trifloxystrobin + metalaxyl; Bayer CropScience): This new seed treatment fungicide can be used to treat soybean as well as a variety of other legume seeds for protection against seedborne and soilborne pathogens that cause seed and seedling diseases.
  • Domark (tetraconazole; Valent): This foliar fungicide had a section 18 emergency use exemption on soybean for control of soybean rust, but recently received full section 3 registration. It can now be applied on soybean for control of soybean rust and additional foliar and stem diseases such as Cercospora blight, frogeye leaf spot, white mold, brown spot, and anthracnose.
  • ProLine (prothioconazole; Bayer CropScience): This fungicide was very recently registered for use on wheat for suppression of Fusarium head blight (scab) and control of leaf and stem diseases.

Several section 18 emergency use exemptions have been approved to allow use of many foliar fungicides on soybean in Illinois for protection against soybean rust. Those approved are listed here; additional fungicides may be approved as we get into the season.

  • Quadris Xtra (azoxystrobin + cyproconazole; Syngenta Crop Protection)
  • Quilt (azoxystrobin + propiconazole; Syngenta Crop Protection)
  • Alto (cyproconazole; Syngenta Crop Protection)
  • Laredo EC (myclobutanil; Dow AgroSciences)
  • Propiconazole products: Tilt (Syngenta Crop Protection); Propimax (Dow AgroSciences); Bumper (Makhteshim Agan)
  • Stratego (propiconazole + trifloxystrobin; Bayer CropScience)
  • Tebuconazole products: Folicur (Bayer CropScience); Orius (Makhteshim Agan); Uppercut (DuPont Crop Protection)
  • Headline SBR (tebuconazole + pyraclostrobin; BASF)

For the past several years, section 18 emergency exemptions have been available to use Folicur fungicide for control of Fusarium head blight (scab) of wheat in Illinois. This has been requested again for the 2007 season, but as of April 11, U.S. EPA had not yet made a decision on this request.--Carl A. Bradley

Author:
Carl A. Bradley

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