Drug – bio-affecting and body treating compositions – Designated organic active ingredient containing – Phosphorus containing other than solely as part of an...
Patent
1998-05-13
2000-01-18
Robinson, Allen J.
Drug, bio-affecting and body treating compositions
Designated organic active ingredient containing
Phosphorus containing other than solely as part of an...
424601, 424602, 424605, 424606, 514269, A01N 4354, A01N 5718, A01N 5926
Patent
active
060158026
DESCRIPTION:
BRIEF SUMMARY
The subject of the present invention is a synergistic fungicidal composition comprising a compound analogous to strobilurin and a process which makes use of the said composition and which is intended for the curative or preventive protection of crops against fungal attacks.
Compounds analogous to strobilurin with a fungicidal effect are known, in particular from European Patent Application EP 253213 or 398692 or from international Application WO 9208703, which make it possible to prevent the growth and the development of phytopathogenic fungi capable of attacking crops.
However, it is always desirable to improve the spectrum of activity and the effectiveness of such compounds with a fungicidal effect or to reinforce them by combining then with other molecules in order to obtain a more effective product (combination with a systemic fungicide, these fungicides instead being molecules of "contact" type) or alternatively to prevent the appearance of fungal strains which are resistant to these new fungicides.
It is also highly desirable to have available fungicidal products which enjoy an improved persistance of effect, likely to space out in time the number of plant-protection treatments necessary for satisfactory control of the parasites.
It is, in any event, particularly advantageous to be able to decrease the amount of chemicals distributed in the environment, while ensuring high-performance protection of crops against fungal attacks.
It has now been found that one (or a number) of the above objects could be achieved by virtue of the fungicidal composition according to the present invention.
The present invention accordingly provides a synergistic fungicidal composition comprising at least one compound A of formula (I): ##STR3## in which: A is the nitrogen atom or the --CH group, --CH.dbd.N--O--CH(CH.sub.3)-- group or the group ##STR4## R.sub.1 is an alkyl group containing 1 to 4 carbon atoms, preferably the methyl group, containing 1 to 4 carbon atoms, preferably the methyl or trifluoromethyl group, different X groups, phosphorous acid and derivatives thereof, for example metal phosphites, such as fosetyl-Al, and alkali metal or alkaline-earth metal salts of phosphorous acid. The compositions will generally contain one compound A.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is an isobole plot for ICIA 5504, i.e. methyl (E)-2-{2-[6-(2-cyanophenoxy)pyrimidin-4-yloxy]phenyl}-3-methoxyacrylate, and fosetyl-Al in Chardonnay vine cuttings against Plasmopara viticola (grape downey mildew); and
FIG. 2 is an isobole plot for SSF-129, i.e. N-methyl-(E)-methoxyimino[2-(2,5-dimethylphenoxymethyl)phenyl]acetamide, and fosetyl-Al in Chardonnay vine cuttings against Plasmopara viticola.
The fungicidal composition according to the invention advantageously comprises the components A and B in an A/B ratio by weight of from 0.004 to 1, preferably from 0.0125 to 0.4.
It is clearly understood that the said fungicidal composition can contain a single compound B or more than one such compound, for example 1, 2 or 3 compounds B, according to the use for which the combination is intended. The composition may also comprise more than one compound A.
Preference is given to the fungicidal composition according to the invention in which the compound A is methyl (E)-2-{2-[6-(2-cyanophenoxy)pyrimidin-4-yloxy]phenyl}-3-methoxyacrylate, methyl (E)-methoxyimino[.alpha.-(o-tolyloxy)-o-tolyl]acetate or N-methyl-(E)-methoxyimino[2-(2,5-dimethylphenoxymethyl)phenyl]acetamide.
Preference is further given, among the more especially preferred meanings of the compound B defined above, to fosetyl-Al. In an entirely unexpected way, the combination according to the invention then significantly improves the effect of the active materials taken separately with respect to a number of fungi which are particularly harmful to crops, for example in particular grapes or the Solanaceae. This improvement is reflected in particular by a decrease in the doses of each of the constituents, which is particularly advantageous for the user and the environment. The fun
REFERENCES:
patent: Re33989 (1992-07-01), Wenderoth et al.
patent: 4829085 (1989-05-01), Wenderoth et al.
Research Disclosure, vol. 338, No. 33893, Jun. 1992, pp. 506-510.
Research Disclosure, vol. 348, No. 34874, Apr. 1993, pp. 267-268.
Tammes, Neth. J. Plant Path. 70 (1964), pp. 73-80.
The Pesticide Manual, ed. Clive Tomlin, British Crop Protection Council, 10.sup.th edition, 1994, pp. 68, 530-532 and 579.
Rhone-Poulenc Agrochimie
Robinson Allen J.
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