Influence of Temperature and Five Fungicides on Rhizoctonia Root Rot of Hard Red Winter Wheat

Abstract

Rhizoctonia root rot is a disease associated with early-planted hard red winter wheat in the Texas Panhandle. Studies were conducted to determine the effect of temperature and fungicide seed treatment on disease development. The fungicides tested included triadimenol, imazalil, difenoconazole, UBI1886, and Nusan+Nuzone. When wheat plants were grown in soil infested with a known pathogenic isolate of Rhizoctonia solani, anastomosis group 4 (AG-4), at five constant temperatures ranging from 15 to 35 C, emergence decreased significantly (P=0.05) as temperatures increased (R 2 =0.50)