Drug – bio-affecting and body treating compositions – Designated organic active ingredient containing – Having -c- – wherein x is chalcogen – bonded directly to...
Reexamination Certificate
2003-03-13
2004-11-30
Levy, Neil S. (Department: 1616)
Drug, bio-affecting and body treating compositions
Designated organic active ingredient containing
Having -c-, wherein x is chalcogen, bonded directly to...
57, 57, C424S405000, C424S406000
Reexamination Certificate
active
06825227
ABSTRACT:
DESCRIPTION
The present invention relates to processes for controlling arthropods, particularly processes for controlling insects and especially processes for controlling insects which ravage crops, particularly rice crops or market-garden crops; as well as to processes for protecting crops, particularly rice crops; as well as to processes directed towards improving the yield of the treated crops; as well as to compositions or products which may be used in such processes.
More specifically, the present invention relates to processes as mentioned above which use specific insecticidal compounds in combination with other insecticidal compounds that are also specific; these are usually processes combining, in a particularly advantageous manner, the action of an insecticidal compound (A) comprising a pyrazole group and the action of an insecticidal compound (B), particularly an insecticidal compound of the pyrethroid family.
The literature discloses processes using a wide variety of insecticidal compounds. However, the known insecticidal compounds used in such processes, although having certain insecticidal effects, often do not make it possible to overcome numerous problems encountered by the users of such products, in particular users seeking specific solutions tailored to quite specific uses.
International patent application WO 95/22902 is known, which discloses certain insecticidal processes that are useful for controlling termites and which use certain specific compounds of the fiprole family with pyrethroids.
Processes for controlling certain specific types of chrysomeles which attack corn crops, and which use a specific pyrazole with certain compounds of the pyrethroid family, are also known from American patent application Ser. No. 09/396,331.
However, these patent applications do not make it possible to provide satisfactory solutions to the problems which may be encountered in combating or controlling insects which ravage crops, in particular by means of specific insecticidal processes.
One of the problems encountered in the protection of crops against harmful arthropods, and in particular insect pests, lies in the need to reduce the amounts of active ingredient used whilst allowing a satisfactory, if not greater, efficacy to be obtained. Indeed, it is common to broadcast or employ large amounts of the said insecticidal active ingredients.
Another problem encountered concerns the need to have available active ingredients which are effective against a broad spectrum of insect pests capable of damaging or damaging crops.
Another problem relates to the effect over time of the active ingredients employed for the protection of crops: it is desirable both to have active ingredients possessing an immediate, or virtually immediate, insecticidal activity following application to the crops, and also that these said active ingredients possess an insecticidal effect whose duration is sufficient to allow effective and lasting protection of the crops against insect pests.
Another problem lies in the fact that certain insecticidal active ingredients do not possess an immediate insecticidal effect but act only after a certain period of time has elapsed following application, thereby allowing the populations of insect pests to multiply before the active ingredient utilized takes effect.
Another problem encountered with a considerable number of insecticidal active ingredients is that they have only a curative effect, therefore obliging the user to undertake demanding and careful monitoring of the crops in order to determine the exact time of treatment.
Another problem of significance is that a number of insecticidal active ingredients have only a preventive effect, therefore forcing the user to broadcast amounts of these active ingredients which, subsequently, prove to be useless.
Another problem associated with the use of certain insecticidal active ingredients resides in the phenomenon of resurgence of the populations of insect pests treated, a phenomenon which is critical to the user, who initially sees the populations of harmful organisms reduced after treatment but then, subsequently, sees these populations grow again. Although this phenomenon of resurgence is not frequent, it is extremely damaging when it does occur.
Another problem which lies in the use of certain known insecticidal compounds is the difficulty of finding a means for effectively controlling a group of several insect pests liable to attack a specific crop.
In particular, it is especially difficult to provide a means of effective insecticidal control for a set of insect pests which ravage rice crops, especially a means of controlling insect pests of the families
Delphacidae, Noctuidae, Plutellidae, Pyralidae, Tortricidae.
The numerous problems which have been set out above are very often accompanied by those associated with the protection of the environment, environmental problems to which the users of insecticidal active ingredients are more and more sensitive, as are the consumers of the products obtained from these crops.
Another difficulty in relation to the use of many insecticides lies in the cumulative effect of two or more of the problems which have been set out above. Indeed, it is even more difficult to solve the problems which have arisen when they accumulate, since the solutions which may be considered are in some cases contradictory or even conflictive.
Moreover, and of a general nature, it is always desirable to improve the spectrum of activity and the efficacy of compounds having an insecticidal action, or to reinforce the said spectra of activity and of efficacy, by combining the said compounds in order to obtain a higher-performance product or combination, as well as processes for combating or controlling insects which ravage crops, these processes being optimally tailored to the specific requirements of the users.
It is also desirable to prevent the appearance of resistances to these insecticides on the part of insect pests.
It is likewise always desirable to provide the user of these insecticidal compounds with an increased range of insecticidal means for combating or controlling insect pests, particularly in the field of agriculture, owing in particular to the devastation which these insect pests can wreak on crops.
It is likewise highly desirable to improve or better control the rate or persistency of action of these insecticidal compounds.
It is likewise always desirable to provide the user of these insecticidal compounds with means of combating or controlling insect pests under specific conditions of use, especially in accordance with the environment of the crops to be protected or in accordance with the crops or the insect pests damaging or damaging these crops, or alternatively according to the degree of infestation with these insect pests.
It is also most desirable to provide insecticidal control means which possess a so-called knockdown insecticidal effect, the said knockdown effect consisting, in the sense of the present text, in a rapid effect of the insecticidal action, usually measured by a rapid decrease in the number of insects. Such a knockdown effect is preferably recognized for active materials whose satisfactory insecticidal action appears within a few hours.
It is likewise desirable to allow a persistency of action over time of the insecticidal action of the insecticidal active ingredients employed.
The present invention therefore proposes to provide solutions to all or part of the many problems which have been set out above. The present invention also proposes to attain all or part of the objectives which have been referred to.
An essential aspect of the present invention relates to specific processes for treating and controlling crop-damaging arthropods, preferentially insecticidal processes, which use an insecticidal compound (A) containing a pyrazole group, and an insecticidal compound (B) of the pyrethroid family.
Preferentially, the processes according to the present invention are advantageously carried out in the agricultural sector, particularly for plant protection.
Adva
Bostian Arlin
Dickmann Richard
Lobo David
Tolentino Paul
Valdez Léopoldo
Bayer CropScience S.A.
Hutchison & Mason PLLC
Levy Neil S.
LandOfFree
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