Adjuvants-Part II (Prostko)

You might recall that I provided you with some general information about spray adjuvants in a December 11, 2023 UGA Weed Science blog post.  I was not aware of (or more likely forgot) that there is an Adjuvant Certification Program spearheaded by the Council of Producers and Distributors of Agrotechnology (CPDA).  Adjuvants that have this certification have met 17 benchmark qualifications of a consistent and quality adjuvant. More information and a complete list of CPDA certified adjuvants can be found at https://cpda.com/adjuvant-certification-history-2/.

Ryegrass Control/Reviton-Peanut Rotation Restriction Change (Prostko)

 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.

 https://secure.caes.uga.edu/extension/publications/files/pdf/SB%2028-15_2.PDF  

Figure 1.  Ryegrass Control with Roundup WeatherMax at Different Rates
and Stages of Growth.

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.  Check out the February 7, 2022 and March 31, 2023 posts on the UGA Weed Science Blog for some earlier comments about Reviton.  

Figure 2.  Section 24(c) Label for Reviton (tiafenacil) in Georgia