Drug – bio-affecting and body treating compositions – Designated organic active ingredient containing – Having -c- – wherein x is chalcogen – bonded directly to...
Patent
1998-01-07
1999-08-24
Robinson, Allen J.
Drug, bio-affecting and body treating compositions
Designated organic active ingredient containing
Having -c-, wherein x is chalcogen, bonded directly to...
514341, A01N 4340, A01N 4356
Patent
active
059425334
DESCRIPTION:
BRIEF SUMMARY
The subject of the present invention is a method for controlling acridians.
The control of acridians using insecticides from the 1-phenylpyrazole family has already been proposed.
In general terms, it is desirable to decrease the doses of active material applied both for environmental reasons and economic reasons, and one aim of the invention is to satisfy this need without harming the effectiveness.
It is also desirable to accelerate the application of antiacridian products on account of the urgency of interventions due to the seriousness of the damage caused by acridians. Another aim of the invention is to satisfy these new needs.
It has now been found that these aims could be achieved by means of the method according to the invention, which consists in applying a composition comprising an active material of formula (I): ##STR2## in which:
n is equal to 0, 1 or 2; and
X represents a nitrogen atom, or alternatively a CR.sup.5 group; and
R.sup.1 is a linear or branched C.sub.1 -C.sub.4 alkyl group or a C.sub.1 -C.sub.4 haloalkyl group; and
R.sup.2 and R.sup.3, which may be identical or different, represent a hydrogen atom or a linear or branched C.sub.1 -C.sub.4 alkyl group which is optionally substituted, in particular with a halogen atom or a hydroxyl, alkoxy, imino or alkylimino group; and
R.sup.4 is a halogen atom or a halomethyl, halomethoxy or SF.sub.5 group; and
R.sup.5 and R.sup.6, which may be identical or different, represent a hydrogen or halogen atom, at least one of them being other than a hydrogen atom when X is a CR.sup.5 ; and
R.sup.7 represents a cyano group or a halogen atom or, when R.sup.1 represents a C.sub.1 -C.sub.4 haloalkyl group, R.sup.7 represents a hydrogen or halogen atom or an alkyl, haloalkyl or cyano group;
the said application being carried out on strips of land which are spaced apart from each other.
According to a particularly advantageous variant of the invention, the compound of formula (I) used in the invention is thyl)sulphinyl!-1H-pyrazole, also known as fipronil.
The compounds of formula (I) may be prepared according to one of the methods described in European patent applications EP 234,119, EP 295,117, EP 679,650 and in International patent application WO 94/21606 and may be used in the form of formulations or compositions also described in at least one of these same patent applications. Such compositions comprise the active material combined with one or more vehicles, as well as, optionally, formulation additives or adjuvants such as surfactants, dispersing agents, wetting agents, binders and the like.
The compositions used in the method according to the invention generally comprise from 0.001 to 95% by weight of compound of formula (I), preferably from 0.2 to 15% by weight.
These compositions may be applied in the method according to the invention using spraying equipment which is known per se. The application of the compositions to large areas of land generally involves the use of application equipment mounted on a truck, or alternatively on an aeroplane; the use of spraying cannons is advantageous.
The application according to the invention is advantageously carried out on strips of land which may be more or less parallel, these treated strips being arranged at more or less regular intervals from each other. It is practical for the treated strips of land to be separated by untreated strips. The ratio of the widths of the untreated strips to the widths of the treated strips is between 1 and 20, preferably between 3 and 15.
The width of the treated strips is generally chosen in relation to the characteristics of the application equipment, these widths generally being between 50 and 800 m, preferably between 100 and 400 m. The alternating presence of treated strips and untreated strips is also advantageous; this results in particular in an appreciable gain in terms of speed of intervention.
The term treated strip refers to the portion of land receiving the composition applied at a dose corresponding to a dose of active material of between 60 and 100% of the maximu
REFERENCES:
patent: 5232940 (1993-08-01), Hatton et al.
patent: 5306694 (1994-04-01), Phillips et al.
Rhone-Poulenc Agrochimie
Robinson Allen J.
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