Engenia™ Label Approved (Prostko)

I just received word that BASF's low volatility formulation of dicamba (Engenia™) was approved for use on dicamba-tolerant (DT) cotton and soybean.  You may recall that Monsanto's Xtendimax™ with Vapor Grip™  was registered back in November 2016.  It is important to remember that Engenia™ and Xtendimax™ are not the same formulation and that their labels are slightly different.  I have tried to succinctly summarize their differences in Table 1.  A copy of the supplemental Engenia™ labels can be accessed from the following locations:  soybean  cotton  

Table 1.  Engenia™ vs Xtendimax™.

	Engenia™	Xtendimax™ with Vapor Grip™
dicamba formulation	BAPMA	DGA
dicamba lbs ae/gal	5.0	2.9
Single POST In-Crop Application Rate/A	12.8 oz	22.0 oz
Total POST  In-Crop Rates/A (2 apps)	25.6 oz	44.0 oz
Total Season Rates/A	51.2 oz	88.0 ozs
Time of Application	PPLNT/PRE/POST (R1)	PPLNT/PRE/POST (R1)
Tractor Speed	< 15 MPH	< 15 MPH
Boom Height	24” or less	24” or less
Nozzles	Turbo TeeJet® TTI11004	Turbo TeeJet® TTI11004
Wind Speed	0-3 MPH = confirm temperature inversion 3-10 MPH = optimum 10-15 MPH = do not apply if wind blowing towards sensitive crops > 15 MPH = do not apply	0-3 MPH = do not apply 3-10 MPH = optimum 10-15 MPH = do not apply if wind blowing towards sensitive crops > 15 MPH = do not apply
GPA	10+	10+
Buffers	110 ft	110 ft = 22 oz/A; 220 ft = 44 oz/A
Tank-Mixes	NO herbicides; NO AMS or UAN www.engeniatankmix.com	NO herbicides; NO AMS or UAN www.xtendimaxapplicationrequirements.com

There is also likely to be another low volatility formulation of dicamba from Dupont® sold as FeXapan™ plus Vapor Grip™. I will let you know when that one gets labeled.  Georgia will issue 24-C labels for these new dicamba formulations which may have additional requirements.  

Liquid "Valors" (Flumioxazin) - Prostko

     In 2017, there will be 2 liquid formulations of flumioxazin available for use.  These include Valor EZ (Valent) and Panther SC (NuFarm).  As far as I know, they are the same stuff in a different bottle (4 lbs ai/gal)!  I am still a bit confused on how these will be marketed since it is likely that that Valor SX 51WG (dry) could be cheaper.  Also, it is very unlikely that Culpepper and I will officially recommend these liquid formulations in Georgia since we have almost no efficacy and/or crop tolerance data.  Earlier today, I did some bottle tests with the local Valent folks (John Altom and Hunt Sanders) to see if there might be any potential tank-mixing problems with the new liquid formulation. A few key observations:

1) When compared to the dry formulation, the liquid formulation disperses more quickly and evenly when mixed with water (Figure 1).

2) However, mixing order is extremely important.  The liquid formulations must be added to the tank first before mixing other chemicals.  If other tank-mix partners, such as glyphosate or paraquat, are put into the tank before the liquid flumioxazin, it is very likely that a nozzle/screen clogging precipitate could occur (Figure 2).

3) Agressive tank-agitation will continue to be very important when using liquid formulations of flumioxazin.  

Figure 1.  The equivalent of 3 oz/A in 15 GPA (Panther 4SC - left; Valor SX 51WDG - right) approximately 10 seconds after adding to the bottle (no agitation or shaking).

Figure 2.  NIS (0.25% v/v) followed by Gramoxone 2SL (48 oz/A) followed by Panther 4SC (3 oz/A) after agitation/shaking (rates equivalent for 15 GPA). Notice white precipitates floating around.