A website from UGA Cooperative Extension

News, events, and happenings in Colquitt County agriculture.

Below are a few words from Dr. Eric Prostko, UGA Weed Sciencist, on the subjects of ryegrass control and the peanut rotation change to the Reviton herbicide label.

A few things you might be interested in:

1) Lately, I have received a few questions about controlling Italian/annual ryegrass in preplant burndown situations.  Assuming resistance is not an issue, glyphosate can be effective but remember that rate and timing are very import (Figure 1).  If you suspect that glyphosate-resistance (GR) is an issue, check out page 85 of the 2024 UGA Pest Control Handbook.  On the bottom of page 85, I have more detailed information about controlling GR-ryegrass.



Fall (Mid-October to Mid-November)—Dual Magnum at 1.33 pt/A or double disking. Add paraquat 2SL at 1–2 pts/A (or equivalent generic) to the Dual Magnum if the ryegrass is emerged.

Winter (Mid-January to Mid-February)—SelectMax or TapOut at 16 oz/A or Select/Arrow at 8 oz/A. Corn can be planted 30 days after application.

Spring (March-April)—paraquat 2SL at 3–4 pts/A (or equivalent generic) + Atrazine 4L at 1 qt/A. An additional application of paraquat can be applied 10–14 days later if control is less than desirable.

These recommendations are based on research conducted by Drs. Jason Bond and Tom Eubanks at Mississippi State University.

2) Via a FIFRA Section 24(c) label, the crop rotation restriction for peanut in Georgia following an application of Reviton (tiafenacil) has been reduced to 0 days (1 oz/A ) and 7 days (2 oz/A).  Refer to the 24(c) label below.