Crop Tolerance and Weed Control in a FullPage™ Rice Cropping System.

Four hybrid rice varieties have been made commercially-available (FullPage™) to provide greater imidazolinone herbicide tolerance and reduce potential rice injury. The objective of this research was to evaluate rice herbicide programs, including imidazolinone chemistries, on crop tolerance and weed control within a FullPage™ rice cropping system. Field experiments were conducted at the University of Arkansas at Pine Bluff farm near Lonoke, Arkansas and the University of Arkansas System Division of Agriculture's Rice Research and Extension Center near Stuttgart, Arkansas in the summer of 2018. Results indicated FullPage™ rice had greater tolerance to the imidazolinone herbicides (imazethapyr and imazamox) than its Clearfield® rice counterparts, especially early season. Additionally, multiple herbicide programs provided sufficient season-long control of barnyardgrass [Echinochloa crus-galli (L.) P. Beauv.] and hemp sesbania [Sesbania herbacea (Mill.) McVaugh] in a FullPage™ rice cropping system while maintaining rough rice yield. [ABSTRACT FROM AUTHOR]