Question:

Cadre seems to be working slowly on sicklepod.  It has been two weeks since application.  Should 2,4-DB be applied now?

Answer:

It takes a while to get complete control of weeds with Cadre.  A significant portion of the weed control with Cadre applied postemergence actually comes from root absorption once Cadre reaches the soil surface.  It can take 3 or 4 weeks to really see the weeds melt away completely.  I would not rush to spray 2,4-DB to control the sicklepod.  The sicklepod that was up when sprayed and the next flush (really flushes throughout the balance of the season) should be controlled by Cadre.  Save the 2,4-DB for application with fungicides later in the season if needed.