Crabgrass watch!
January 28, 2022
Bottom line: Base crabgrass preemergent herbicide application on soil temperature (53-55 F in the surface 2 - 4 inches for several consecutive days) or threat temperature rather than calendar based application. Dr. Yelverton has not posted a warning for 2022, but temperatures are within the crabgrass threat for some southwwestern locations.
For the second time in as many years, Dr. Fred Yelverton, NC State Weed Scientist, posted a warning about timing of preemergent herbicide applications for 2021. Dr. Yelverton suspects…