Cover Crops in Corn Stalks

Article from CORN Newsletter on September 1, 2020 – By Mark Loux and Alyssa Essman, OSU

Herbicides with a residual that is used in corn and soybeans can affect the establishment of fall-planted cover crops and should be taken into account when planning cover crop practices and selecting species. Soil characteristics and weather also play a role in the persistence of residual herbicides, which can vary by field and year. More information is needed on rotational intervals for many cover crop species, and this information is often not included on herbicide labels. University weed scientists have studied the effect of residual herbicides on some of the most popular cover crop species in order to provide this information to growers. In general, residual herbicides that control grass weeds can hinder the establishment of grass cover crop species. Broadleaf cover crop species are most impacted by group 2 (ALS inhibitors), 5 (PSII inhibitors), 14 (PPO inhibitors), and 27 (HPPD inhibitors) herbicides (Purdue University). Continue reading Herbicide Residue Considerations for Fall Cover Crop Establishment →