As referenced, the ester formulation is typically “hotter” than the amine formulation which can lead to better weed control but can also create a higher potential for crop injury during post emerge applications.ĪLWAYS READ AND FOLLOW PESTICIDE LABEL DIRECTIONS. Consideration should be made on formulation for these applications as well. Always read and follow all label directions and recommendations as far as growth stage and timing when making these applications. Neither 2,4-D formulation offers much for soil activity therefore, alternative or tank-mix products should be considered if residual control is desired or wanted.īoth formulations are labeled for certain in-crop usage in corn, sorghum, and many small grain crops. If sensitive crops are emerged and present in the application area, the amine formulation may help limit the risk of off-target movement due to volatility and damage to neighboring crops or sensitive areas. Ester formulations can offer better activity as well.įor spring burndown applications, an amine formulation should be considered due to the reduced risk of volatility. Typically, there is less risk of damaging sensitive crops in the fall because environmental conditions are generally favorable and most annual crops have either been harvested or reached maturity. A jar test can be conducted to determine the compatibility of spray formulations.īoth the ester and amine formulations should be considered if 2,4-D is determined to be an effective herbicide for your weed control program.įor fall burndown applications, the ester formulation may be a better option. While there can be mixing issues with both formulations, the amine formulation sold is typically more difficult to mix with UAN than the ester formulation because it has a higher tendency to precipitate out of solutions. UAN fertilizer is commonly used as a spray solution carrier in certain burndown and small grain applications. This allows ester formulations to penetrate the cuticle and get into the leaf more efficiently to eventually interfere with plant growth.Īnother difference in the formulations is how well they mix with liquid fertilizer carriers. Esters are lipid soluble and move through the cuticle faster than amines which are more water soluble. 1 Amines are still typically less volatile than even “low volatile” ester formulations.Īmine formulations may provide slightly less weed control because ester formulations are more soluble on the plant’s cuticle. These formulations are formulated as long chain esters to make the molecule less volatile. Some ester formulations (2,4-D LV6 and 2,4-D LV4) are referred to as “low volatile” esters. Certain environmental conditions can increase the potential for volatility, such as hot dry weather. The ester formulations of 2,4-D have a higher vapor pressure and have the potential to volatilize more than amines. Both major 2,4-D formulations can be used in-crop depending on the label and crop however, use as a burndown in fall and spring is a primary use.
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