Systemic herbicides and methods of use
First Claim
1. A herbicidal composition comprising a herbicidally effective amount of a combination of a systemic herbicide stable in said composition and a monoadduct of sulfuric acid with a compound, other than urea, having the formula:
- ##STR9## wherein X is selected from the group consisting of oxygen and sulfur;
R1 is hydrogen; and
each of R2 and R3 is independently selected from the group consisting of hydrogen, C3 to C10 substituted or unsubstituted cyclic radicals, C1 to C10 substituted or unsubstituted acyclic radicals, C3 to C10 substituted or unsubstituted cyclic radicals containing one or more heteroatoms, and C1 to C10 substituted or unsubstituted acyclic radicals containing one or more heteroatoms wherein (a) said substituents are selected from the group consisting of thiol, hydroxy, nitro, amino, nitrile, amide, ester, and halogen groups, and (b) said heteroatoms are selected from the group consisting of sulfur, nitrogen, oxygen, and phosphorus atoms.
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Abstract
Herbicidal compositions having systemic herbicidal activity comprise solutions containing one or more systemic herbicides and an amount of an amide and sulfuric acid of the following formula sufficient to accentuate the activity of the systemic herbicide: ##STR1## wherein X is chalcogen, and each of R1, R2 and R3 is independently selected from hydrogen and organic radicals. As used herein, "amide" encompasses all compounds of formula (1) regardless of the chalcogen employed. The molar ratio of amide to sulfuric acid is usually within the range of about 1/4 to less than 2 so that at least some of the sulfuric acid is present as the monoamide-sulfuric acid adduct. The monoamide adduct also acts as a contact herbicide and thereby assists in the immediate control of treated vegetation. Solid compositions comprising combinations of systemic herbicides, sulfuric acid and the useful amides, with and without surfactants, and methods of using the solutions are also disclosed.
34 Citations
29 Claims
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1. A herbicidal composition comprising a herbicidally effective amount of a combination of a systemic herbicide stable in said composition and a monoadduct of sulfuric acid with a compound, other than urea, having the formula:
- ##STR9## wherein X is selected from the group consisting of oxygen and sulfur;
R1 is hydrogen; and
each of R2 and R3 is independently selected from the group consisting of hydrogen, C3 to C10 substituted or unsubstituted cyclic radicals, C1 to C10 substituted or unsubstituted acyclic radicals, C3 to C10 substituted or unsubstituted cyclic radicals containing one or more heteroatoms, and C1 to C10 substituted or unsubstituted acyclic radicals containing one or more heteroatoms wherein (a) said substituents are selected from the group consisting of thiol, hydroxy, nitro, amino, nitrile, amide, ester, and halogen groups, and (b) said heteroatoms are selected from the group consisting of sulfur, nitrogen, oxygen, and phosphorus atoms. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 11, 13, 14, 15, 16)
- ##STR9## wherein X is selected from the group consisting of oxygen and sulfur;
- 2. A herbicidal composition comprising a herbicidally effective amount of a combination of a systemic herbicide stable in said composition and a monoadduct of sulfuric acid and one or more members selected from the group consisting of biuret, triuret, formamide, thioformamide, dimethylformamide, thiourea, mono-N-allyl thioformamide, 1-(4-aminobenzenesulfonyl)-2-thiourea, 1-benzoylurea, 1,3-bis(2-ethoxyphenyl) carbamide, 1-(2-bromo-3-methylbutanoyl) carbamide, 1-(4-bromophenyl) carbamide, 1,3-diacetyl carbamide, 1-ethyl-2-selenourea and N,N-methylphenyl formamide.
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19. A method for controlling the growth of vegetation which comprises contacting said vegetation with a herbicidally effective amount of a composition comprising a systemic herbicide stable in said composition and a monoadduct of sulfuric acid with a compound, other than urea, having the formula:
- ##STR10## wherein X is selected from the group consisting of oxygen and sulfur;
R1 is hydrogen; and
each of R2 and R3 is independently selected from the group consisting of hydrogen, C3 to C10 substituted or unsubstituted cyclic radicals, C1 to C10 substituted or unsubstituted acyclic radicals, C3 to C10 substituted or unsubstituted cyclic radicals containing one or more heteroatoms, and C1 to C10 substituted or unsubstituted acyclic radicals containing one or more heteroatoms wherein (a) said substituents are selected from the group consisting of thiol, hydroxy, nitro, amino, nitrile, amide, ester, and halogen groups, and (b) said heteroatoms are selected from the group consisting of sulfur, nitrogen, oxygen, and phosphorus atoms. - View Dependent Claims (20, 21, 22, 23, 24)
- ##STR10## wherein X is selected from the group consisting of oxygen and sulfur;
Specification