Illinois Corn, Soybeans: Emerging Crops and Delayed PRE Herbicide Applications

Pre-emergence herbicide application. ©Debra L Ferguson Stock Photography

Pre-emergence herbicide application. ©Debra L Ferguson Stock Photography

Soil-residual herbicides are important components of integrated weed management programs. Labels of many single and multiple active ingredient products allow application before and after crop emergence, but other active ingredients can cause severe crop injury if applied to emerging crop plants.

In fields where a PRE herbicide application has been delayed and corn or soybean are beginning to emerge, the following active ingredients (applied either alone or as a premix product) or commercial products should not be applied:

Corn

  • saflufenacil (Sharpen and Verdict, for example)
  • simazine (Princep, for example)
  • flumioxazin (Fierce, for example)
  • Prequel (isoxaflutole + rimsulfuron)

 Soybean

  • sulfentrazone (many Authority-based products, for example)
  • flumioxazin (many Valor-based products, for example)
  • metribuzin (TriCor, a component of Boundary, for example)
  • pendimethalin (Prowl H2O, for example)
  • saflufenacil (Sharpen, Zidua Pro, for example)
  • linuron (Lorox, for example)
  • tribenuron (Canopy EX, for example)
  • clomazone (Command, for example)

Source URL: https://farmdoc.illinois.edu/field-crop-production/weeds/emerging-crops-and-delayed-pre-herbicide-applications.html