Drug – bio-affecting and body treating compositions – Designated organic active ingredient containing – Having -c- – wherein x is chalcogen – bonded directly to...
Patent
1998-01-09
1999-09-07
Robinson, Allen J.
Drug, bio-affecting and body treating compositions
Designated organic active ingredient containing
Having -c-, wherein x is chalcogen, bonded directly to...
514508, 514528, A01N 3734, A01N 3752, A01N 4376
Patent
active
059488050
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
This invention pertains to agriculturally suitable compositions containing an advantageous combination of certain fungicidal oxazolidinone compounds with another fungicide, and methods for the use of such compositions to control fungus disease in certain plants.
Fungicides that effectively control plant diseases are in constant demand by growers. Plant diseases are highly destructive, difficult to control and quickly develop resistance to commercial fungicides. Combinations of pesticides are often used to facilitate disease control, to broaden spectrum of control and to retard resistance development. It is recognized in the art that the advantages of particular pesticide combinations can often vary, depending on such factors as the particular plant and plant disease to be treated, and the treatment conditions.
WO 90/12791 discloses certain oxazolidinone compounds as fungicides including 5-methyl-5-(4-phenoxyphenyl)-3-phenylamino-2,4-oxazolidinone (i.e., the Formula I compound defined herein). U.S. Pat. No. 3,954,992 discloses cymoxanil as a fungicide. Synergistic combinations of cymoxanil and oxazolidenylacetamides such as oxadixyl are disclosed in U.S. Pat. No. 4,507,310. These references neither disclose nor suggest synergistic compositions comprising an oxazolidinone and cymoxanil.
SUMMARY OF THE INVENTION
This invention pertains to an advantageous combination of cymoxanil (and/or an agriculturally suitable salt thereof) and the oxazolidinone of Formula I. This invention provides fungicidally active compositions comprising a fungicidally effective amount of a mixture of (a) at least one compound selected from the oxazolidinone of Formula I and agriculturally suitable salts thereof, and (b) at least one compound selected from cymoxanil and agriculturally suitable salts thereof, and optionally (c) at least one of a surfactant, a solid diluent or a liquid diluent wherein the weight ratio of component (a) to component (b) is from about 17:1 to about 1:100. ##STR2##
The compound of Formula I is also known as 5-methyl-5-(4-phenoxyphenyl)-3-phenylamino-2,4-oxazolidinone.
This invention also provides methods for controlling plant diseases caused by fungal plant pathogens comprising applying to the plant or portion thereof to be protected, or to the plant seed or seedling to be protected one of the following: compound of Formula I as defined above, or an agriculturally suitable salt thereof, (b) cymoxanil, or an agriculturally suitable salt thereof, and (c) at least one of a surfactant, a solid diluent or a liquid diluent; compound of Formula I as defined above, or an agriculturally suitable salt thereof, and (c1) at least one of a surfactant, solid or liquid diluent; and (ii) an effective amount of a second composition comprising (b) cymoxanil, or an agriculturally suitable salt thereof, and (c2) at least one of a surfactant, a solid diluent or a liquid diluent, said first and second compositions applied sequentially in any order; or compositions as defined in 2 above. normally from about 17:1 to 1:100, and the compound of (a) and the compound of (b) are normally applied in amounts effective to provide control of the fungal disease which is greater than the additive control of that fungal disease provided by the compound of (a) and the compound of (b) individually.
DETAILED DESCRIPTION OF THE INVENTION
It has been found that combinations of the compound of Formula I and cymoxanil provide control of certain plant diseases which is substantially and surprisingly enhanced over the expected simply additive control by said components.
Cymoxanil, tradename Curzate.RTM., is a commercially available foliar fungicide for control of late blight and downy mildew diseases, particularly for systemic and curative control of potato late blight and grape downy mildew, having the formula: ##STR3## which is also known as
The compound of Formula I can exist as enantiomers. One skilled in the art will appreciate that one enantiomer may be more active and/or may exhibit beneficial effects when enr
REFERENCES:
patent: 3954992 (1976-05-01), Davidson
patent: 4507310 (1985-03-01), Devoise-Lambert
patent: 4957933 (1990-09-01), Geffken et al.
patent: 5552554 (1996-09-01), Sternberg et al.
U. S. Application No. 07/976,130 (Docket No. BA-8992) which is identified as a priority document in WO 94/11359 and U.S. Pat. 5,552,554. (Nov. 13, 1992) Martin.
Geddens Ray M.
Martin Marsha J.
E. I. Du Pont de Nemours and Company
Robinson Allen J.
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