In a 2004 University of Delaware survey, 69 percent of growers with glyphosate-resistant horseweed (marestail) reported that they made two or more changes in their soybean production systems to combat resistance, and 95 percent reported increases in production costs to execute these changes.
Changes included:
- Altering soybean herbicide program prior to planting
- Rotating to a different crop
- Changing tillage program to field cultivation
- Applying additional applications of glyphosate or another post-emergence herbicide
- Planting conventional soybeans
|
