M from Pa writes
The whitening process that occurs after applying Tenacity can take anywhere from a few days up to about 3 weeks. Timing of complete death of weeds can vary depending on the type of weeds, the height and root system, soil temps, weather and temperatures in the region. The foliage of treated weeds cease growth after the application and then the loss of chlorophyll that causes the whitening will begin with death occuring typically after 3 weeks. The product label does advises that a repeat application is required after two to three weeks for improved postemergence weed control. Review the Weeds Controlled starting on page 8 of the product label to verify the weeds you are targeting as listed for Post Emergent Control with Tenacity and that a Non Ionic Surfactant is tank mixed for the application. Tenacity when applied for pre emergent applications in early spring and late fall to help prevent weeds from germinating and would not require the use of a Non Ionic Surfactant and the whitening process does not occur with pre emergent applications.
Answer last updated on: 10/27/2021
