Late-Season Florida Beggarweed in Peanut (Prostko)
I have been getting a few calls/texts/e-mails about late-emerging Florida beggarweed in peanut fields, especially in fields that did not get a PRE application of Valor.
Peanut growers have 2 options for the control of Florida beggarweed at this time of year. The first is a POST application of Classic 25DG @ 0.5 oz/A + NIS @ 0.25% v/v. Classic can be applied POST in peanut from 60 days after emergence (DAE) until 45 days before harvest. The latest update that I have in regards to variety tolerance to Classic is as follows: Classic should NOT be used on GA-06G and Tifguard due to potential yield losses (7-11%). The following peanut varieties have demonstrated adequate tolerance to Classic in UGA replicated/weed-free field trials: Florida-07; GA-Greener; GA-07W; GA-18RU; AUNPL-17; TIFNV High O/L; GA-20VHO; and FloRun™ 331. For GA-09B, peanut yields were reduced by 5% when applied 75 DAE but no yield loss occurred when applied 60, 90, or 105 DAE. For GA-16HO, peanut yields were reduced by 13% when Classic was applied at 70 DAE, but no yield loss occurred when applied at 60 DAE or 85 DAE. For GA-12Y, peanut yields were reduced 8% when Classic was applied 60 DAE but not at 70 DAE or 85 DAE. For TifNV-HG, Classic had no effect on peanut yield when applied 64 DAE or 74 DAE (only 1 year of data but repeating in 2026).
The second option that peanut growers have for later emerging Florida beggarweed in peanut is to use a 33% solution of Gramoxone 3SL (paraquat) in a non-selective applicator (NSA). Based upon field trials conducted many moons ago in Georgia, the following NSA’s were more effective:
For additional information about the use of Classic or Gramoxone for the late-season control of Florida beggarweed in peanut, check out page 225 in the 2026 UGA Pest Control Handbook-Volume I.
