The U.S. Environmental Protection Agency (EPA) has issued Section 18 emergency exemptions for the active ingredients myclobutanil and propiconazole to be used in Missouri, Kansas, Oklahoma and Texas for the control of soybean rust.

Use of myclobutanil (marketed under the brand names Laredo® EC and Laredo EW fungicides) and propiconazole (marketed under the brand name PropiMax® EC fungicide) will not be allowed until the presence of soybean rust has been confirmed in the continental United States by the Animal and Plant Health Inspection Service (APHIS) of the U.S. Department of Agriculture. Under this Section 18, use of these systemic triazole fungicides will be limited to a maximum of two applications.

The following states have also accepted Section 18 emergency exemptions for myclobutanil and propiconazole: Minnesota, South Dakota, North Dakota, Iowa, Illinois, Kentucky, New York, Maryland and Mississippi