9340 Cotton Grower Adoption of Weed Resistance Management Practices

Thursday, January 8, 2009: 9:30 AM
Salon C (Marriott Riverwalk Hotel)
George Frisvold, University of Arizona, Tucson, AZ, Terry Hurley, University of Minnesota, St Paul, MN and Paul Mitchell, University of Wisconsin, Madison, WI
This study examines cotton grower adoption of 10 different weed resistance management practices using survey data from 400 Southern and Southern Plains producers.   About 95% of growers always or often adopted 5 or more resistance management practices, while more than 70% always or often adopted 7 or more practices.  Growers that planted a greater share of cotton acres to Roundup® or Roundup Ready® Flex varieties scouted for weeds before applying herbicides more frequently and started with a clean field more frequently. Greater reliance on Roundup Ready® varieties was negatively associated with adoption of supplemental tillage to control weeds.  This last result is consistent with survey findings that growers were more likely to practice no-till or minimum till on their  Roundup® or Roundup Ready® Flex acres.