Plant protecting and regulating compositions – Plant growth regulating compositions – Plural active ingredients
Patent
1998-12-15
2000-04-04
Clardy, S. Mark
Plant protecting and regulating compositions
Plant growth regulating compositions
Plural active ingredients
504136, A01N 3506, A01N 4736
Patent
active
060461349
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The control of undesired vegetation is extremely important in achieving high crop efficiency. Achievement of selective control of the growth of weeds especially in such useful crops as rice, soybeans, sugar beets, corn, potatoes, wheat, barley, tomatoes and plantation crops among others is very desirable. Unchecked weed growth in such useful crops can cause significant reduction in productivity and thereby result in increased costs to the consumers. The control of undesired vegetation in noncrop areas is also important. The need for finding products that achieve such results continues to be commercially important.
Combinations of herbicides are typically used to broaden the spectrum of plant control or enhance the level of control of any given species through additive effect. Certain rare combinations surprisingly give a greater-than-additive or synergistic effect on weeds or a less-than-additive or safening effect on the crop. The present invention relates to several such valuable combinations.
U.S. Pat. No. 5,506,196 discloses 2-[4-(methylsulfonyl)-2-nitrobenzoyl]-1,3-cyclohexanedione (named as 2-(2'-nitro-4'-methylsulfonylbenzoyl)-1,3-cyclohexanedione) and its herbicidal utility, but this reference does not disclosure the herbicidal mixtures of the present invention or their surprising crop-safening effect in corn.
SUMMARY OF THE INVENTION
This invention relates to herbicidal mixtures comprising herbicidally effective amounts of the compound of Formula I and agriculturally suitable salts thereof in admixture with herbicidally effective amounts of one or more of the compounds of Formulae IIa through IIf and agriculturally suitable salts thereof. This invention also relates to herbicidal compositions comprising effective amounts of the aforesaid mixtures and at least one of the following: surfactant, solid or liquid diluent. This invention also relates to a method of controlling undesired vegetation comprising applying to the locus of the vegetation herbicidally effective amounts of the aforesaid mixtures.
The mixtures of the invention comprising the Formula I and Formulae IIa-f compounds are described below: ##STR1## 2-[4-(methylsulfonyl)-2-nitrobenzoyl]-1,3-cyclohexanedione (I); ##STR2## 2-[[[[(4,6-dimethoxy-2-pyrimidinyl)amino]carbonyl]amnino]sulfon yl]-N,N-dimethyl-3-pyridinecarboxamide (nicosulfuron, IIa); ##STR3## N-[[(4,6-dimethoxy-2-pyrimidinyl)amino]carbonyl]-3-(ethyls ulfonyl)-2-pyridinesulfonamide (rimsulfuron, IIb); ##STR4## methyl 3-[[[[(4-methoxy-6-methyl-1,3,5-triazin-2-yl)amino]carbonyl]amino]sulfonyl ]-2-thiophenecarboxylate (thifensulfuron methyl, IIc); ##STR5## methyl 2-[[[[[4,6-bis(difluoromethoxy)-2-pyrimidinyl]amino]carbonyl]amino]sulfony l]-benzoate (primisulfuron methyl, IId); ##STR6## N-[[(4-methoxy-6-methyl-1,3,5-triazin-2 -yl)amino]carbonyl]-2-(3,3,3-trifluoropropyl)-benzenesulfonamide (prosulfuron, IIe); ##STR7## methyl 3-chloro-5-[[[[(4,6-dimethoxy-2-pyrimidinyl)amino]carbonyl]amino]sulfonyl] -1-methyl-1H-pyrazole-4-carboxylate (halosulfuron methyl, IIf).
The compounds of Formulae IIa-f and particularly the compound of Formula I can exist as one or more tautomers. One skilled in the art will recognize that said tautomers often exist in equilibrium with each other. The present invention includes mixtures of such tautomers as well as the individual tautomers of compounds of Formulae I and IIa-f.
The mixtures of the invention preferred for enhanced herbicidal utility include:
The herbicidal compositions of the invention preferred for enhanced herbicidal utility include: one of the following: surfactant, solid or liquid diluent.
For reason of weed control spectrum and/or crop selectivity, the preferred crop for application of the mixtures of this invention is corn (maize).
DETAILS OF THE INVENTION
The benzoyl cyclohexanedione compound of Formula I can be prepared as described in U.S. Pat. No. 5,006,158. The synthesis involves rearrangement of the enol ester of Formula 1 in the presence of acetone cyanohydrin and triethylamine in acetonitrile. ##S
REFERENCES:
patent: 5506195 (1996-04-01), Ensminger et al.
De Gennaro Francis Patrick
Smith, III William Francis
Clardy S. Mark
E. I. Du Pont de Nemours and Company
LandOfFree
Herbicidal mixtures does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Herbicidal mixtures, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Herbicidal mixtures will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-364784