Aqueous concentrated herbicidal compositions containing glyphosate salts and dicamba salts

a technology of dicamba salt and concentrate composition, which is applied in the field of herbicidal concentrate compositions, can solve the problems of uncontrolled cell division and growth, abnormal leaf shape and venation, and slow uptake (i.e., absorption) of glyphosate by the plant foliar tissue, and achieve the effect of low volatility

Pending Publication Date: 2020-11-12
MONSANTO TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The solution provides a stable, concentrated herbicidal composition that can be easily diluted, reducing storage and transportation needs, minimizing tank mixing errors, and enhancing herbicidal effectiveness with improved surfactant compatibility and reduced dicamba volatility, leading to effective weed control.

Problems solved by technology

Although glyphosate is very effective in killing or controlling the growth of unwanted plants, the uptake (i.e., absorption) of glyphosate by the plant foliar tissue and translocation of glyphosate throughout the plant is relatively slow.
Auxin-like herbicides appear to affect cell wall plasticity and nucleic acid metabolism, which can lead to uncontrolled cell division and growth.
The injury symptoms caused by auxin-like herbicides include epinastic bending and twisting of stems and petioles, leaf cupping and curling, and abnormal leaf shape and venation.
Under certain conditions of application, dicamba can migrate from the application site to adjacent crop plants, such as soybeans and cotton, where contact damage to sensitive plants can occur.

Method used

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  • Aqueous concentrated herbicidal compositions containing glyphosate salts and dicamba salts
  • Aqueous concentrated herbicidal compositions containing glyphosate salts and dicamba salts
  • Aqueous concentrated herbicidal compositions containing glyphosate salts and dicamba salts

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0054]Various aqueous herbicidal concentrate compositions containing glyphosate salt and dicamba salt were prepared by adding the desired base (e.g., monoethanolamine (MEA), isopropylamine (IPA) or potassium hydroxide) to stock glyphosate salt solutions. Salt solutions of dicamba (e.g., diglycolamine (DGA), MEA, and K salts) were added to the glyphosate salt solutions to the desired acid equivalent weight ratio (e.g., glyphosate to dicamba weight ratios of 3:1, 2:1, or 1.5:1).

[0055]The solutions which provided stable, compatible herbicidal concentrate compositions upon mixing are listed below in Table 1.

TABLE 1Weight ratio a.e.Total herbicideGlyphosateDicamba(Glyphosate / loadingsaltsaltDicamba)(g / l a.e.)MEADGA3:1480MEAMEA3:1480MEAK3:1480IPADGA3:1360IPAMEA3:1360IPAK3:1360KDGA3:1220KMEA3:180KK3:180MEADGA2:1480MEAMEA2:1480MEAK2:1480IPADGA2:1330IPAMEA2:1330KDGA2:1330KMEA2:1330MEADGA1.5:1 480MEAMEA1.5:1 480MEAK1.5:1 480

example 2

[0056]To evaluate whether surfactant(s) could be effectively incorporated into the aqueous herbicidal concentrate compositions of the present invention, several concentrate solutions containing MEA glyphosate and DGA dicamba and having a total herbicidal loading of approximately 480 g / l a.e. were prepared as described in Example 1, except various surfactants were combined the solution concentrates. The stability of the solutions was observed upon mixing and any precipitation or phase separation was noted. The stability of the solutions that appeared relatively homogeneous upon mixing was tested further by storing them at room temperature for 24 hours. Any precipitation or phase separate was noted after the 24 hour time period. Table 2 presents the results of these experiments.

TABLE 2Surfactants combined with concentrates containing approx.480 g / l a.e. of MEA glyphosate salt and DGA dicamba salt.WeightStableratio a.e.Surfactantconcentrate after(Glyphosate / (wt. % inCloud24 hours?Dicam...

example 3

[0058]To evaluate whether higher concentrations of surfactant(s) could be effectively incorporated into the aqueous herbicidal concentrate compositions of the present invention, concentrate solutions containing a 1.5:1 weight ratio of MEA glyphosate and DGA dicamba and having a total herbicidal loading of approximately 480 g / l a.e. were prepared in accordance with Example 1. Ethoquad C-12 dissolved in propylene glycol or diethylene glycol was then combined with the concentrates. The stability of the solutions was observed and any precipitation or phase separation was noted. Table 3 presents the results of these experiments.

TABLE 3StableEthoquad C-12concentrate(wt. % inCloudformed?solution)Solventpoint(Yes / No)7.5Diethylene>90°C.YesGlycol10Diethylene85°C.YesGlycol7.5Propylene>90°C.YesGlycol10Propylene—NoGlycol

[0059]The results show that stable, clear herbicidal concentrates containing surfactant 10 wt. % Ethoquad C-12 dissolved in diethylene glycol were successfully prepared. The conc...

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Abstract

Herbicidal concentrate compositions containing a combination of glyphosate salt and dicamba salt are provided. For example, a low volatility aqueous herbicidal concentrate composition including a glyphosate salt, dicamba salt, and a surfactant is described, wherein (i) the composition contain a total active herbicide loading of glyphosate salt and dicamba salt of at least about 450 grams acid equivalent per liter; (ii) the pH of the concentrate composition is less than about 5.7; and (iii) the acid equivalent weight ratio of glyphosate salt to dicamba salt is from about 1:1 to about 3:1.

Description

REFERENCE TO RELATED APPLICATIONS[0001]This application is a continuation of U.S. application Ser. No. 14 / 405,036, filed Dec. 2, 2014, which is the 371 National Stage of International PCT Application No. PCT / US2013 / 043995, filed Jun. 4, 2013, which claims the benefit of U.S. Provisional Application Nos. 61 / 655,018, filed Jun. 4, 2012, the contents of which are incorporated herein in their entirety.FIELD OF THE INVENTION[0002]The present invention generally relates to herbicidal concentrate compositions containing a combination of herbicides. In particular, the present invention relates to aqueous herbicidal concentrate compositions containing glyphosate salt and dicamba salt herbicides.BACKGROUND OF THE INVENTION[0003]The present invention relates generally to herbicidal concentrate compositions, processes for preparing these concentrates, and methods of using such compositions to kill or control the growth and proliferation of unwanted plants. In particular, the present invention r...

Claims

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Application Information

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Patent Type & AuthorityApplications(United States)
IPC IPC(8): A01N57/20A01N37/40A01N37/10
CPCA01N37/10A01N57/20A01N37/40A01N2300/00
InventorMACINNES, ALISON
OwnerMONSANTO TECH LLC