Drug – bio-affecting and body treating compositions – Designated organic active ingredient containing – Having -c- – wherein x is chalcogen – bonded directly to...
Patent
1998-01-21
2000-01-11
Pak, John
Drug, bio-affecting and body treating compositions
Designated organic active ingredient containing
Having -c-, wherein x is chalcogen, bonded directly to...
514341, 514918, 424405, A01N 4356, A01N 4340, A01N 2500
Patent
active
060136618
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a new process for repelling birds and to a new process for protecting crops against birds.
Each year during winter, birds cause considerable damage to cereal sowings by attaching either the grain itself, which, being still only lightly buried, can easily be unearthed by birds, or the young plantlet, as soon as the latter emerges from the ground. The birds which cause damage are in particular the Corvidae (crows and others), the Sturnidae (starlings and others), the passerines, the Galliformes (in particular pheasants and partridges) and the Columbiformes (in particular pigeons and turtledoves).
The effect of this damage on the future harvest is reflected by very large falls in yield.
For a long time, farmers have only had available means of their own devising for controlling birds (scarecrow, firecrackers and the like).
The protection of crops against birds remains a permanent problem. Legislation for protecting the environment is becoming increasingly strict and, in particular, it increasingly protects birds, harmful or otherwise. Designating certain species as harmful animals makes it permissible to destroy them, under less draconian regulations, but it is increasingly difficult legally to designate birds as harmful animals which are in reality and in practice harmful.
It is therefore desirable to have available bird-repellent agents. It is also desirable to have available new bird-repellent agents in order for the birds not to become used to the repellent agents and not to become insensitive to their presence.
The prediction of the repellent nature of such and such a product is all the more difficult since some products are attractive for some categories of animals and repellent for others, without there being a general rule to guide the choice in one direction or the other.
It is also desirable to have available bird-repellent agents which have a good persistence of action. Indeed, birds attack grains throughout the period ranging from sowing until the time when the young plantlet emerging from the seed reaches a certain stage of development.
At this point, the seed of a cereal is devoid of its nutrient substance and is therefore no longer capable of being of interest to a bird in search of food. A good repellent must therefore exert its effect for a period sufficient to enable the cereal to reach this stage of development.
It is also desirable to have available a repellent which has a low toxicity for game which has to be protected, it being possible for this toxicity to be low either in itself or as a result of the small size of the doses applied.
An object of the present invention is to provide a new process for the protection of crops against birds.
Another object of the present invention is to provide a process for the protection of crops against birds which has none or few of the disadvantages of known repellents and which corresponds, in all or part, to the quality objectives required for an ideal repellent.
Another object of the present invention is to provide a process for the protection of crops against harmful birds and against harmful insects simultaneously.
Another object of the present invention is to provide a new process for repelling birds.
Another object of the present invention is to provide new compositions which are repellent with respect to birds.
It has now been found that these aims could be achieved by virtue of compositions comprising, as bird-repellent active material, 1-phenylpyrazoles and preferably 1-phenylpyrazoles of general formula (I).
The 1-phenylpyrazoles capable of being employed in the invention are therefore advantageously products of formula (I): ##STR1## in which:
R.sub.1 is CN or methyl;
R.sub.2 is S(O).sub.n R.sub.3 ;
R.sub.3 is alkyl or haloalkyl;
R.sub.4 represents a hydrogen or halogen atom or an NR.sub.5 R.sub.6, S(O).sub.m R.sub.7, C(O)R.sub.7 or C(O)O-R.sub.7, alkyl, haloalkyl or OR.sub.8 radical or an --N.dbd.C(R.sub.9) (R.sub.10) radical;
R.sub.5 and R.sub.6 independently represent the hydrogen atom or an alkyl, haloalk
REFERENCES:
patent: 4804675 (1989-02-01), Jensen-Korte et al.
patent: 5232940 (1993-08-01), Hatton et al.
patent: 5306694 (1994-04-01), Phillips et al.
patent: 5364626 (1994-11-01), Hasegawa et al.
patent: 5451598 (1995-09-01), Salmon
patent: 5716977 (1998-02-01), Colliot et al.
Choi Frank
Pak John
Rhone-Poulenc Agrochimie
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