For at least 15 years, application of respiratory inhibitor fungicides azoxystrobin and trifloxystrobin has been the major control method for sheath blight, the most important disease of rice in the southern United States. In 2010 and 2011, in an area near Mowata in Acadia Parish, sheath blight control with these fungicides was very poor, even after multiple applications. So read more on control without these chemistries from this AgFax article.