Plant protecting and regulating compositions – Plant growth regulating compositions – Plural active ingredients
Patent
1997-02-27
2000-03-07
Pak, John
Plant protecting and regulating compositions
Plant growth regulating compositions
Plural active ingredients
504130, 504142, 504235, 504244, 504250, 504251, 504320, 71DIG1, 71DIG2, A01N 4340, A01N 4360, A01N 3704, A01N 2530
Patent
active
060340355
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to an enhancer composition for agricultural chemicals and an agricultural chemical composition containing the same, more specifically to a liquid enhancer for herbicides having a higher enhancer effect to bipyridinium series herbicides, which is represented by paraquat, and an excellent storage stability.
RELATED ART
Agricultural chemicals including insecticides, fungicides, herbicides, miticides, and plant growth regulators have been used in the forms of emulsions, wettable powder, granules, powder materials, and flowables. In using them, various attempts in terms of the properties of the formulations have been made in order to fully bring out the effectivenesses of agricultural chemical components. However, the existing situation is that it is difficult to further enhance the effectivenesses of agricultural chemicals through contrivances in terms of formulations. It is further difficult to develop novel agricultural chemicals, so that it is industrially very significant to further enhance the activities of existing agricultural chemicals.
As substances having the effect of enhancing the activities of agricultural chemicals, surfactants comprising various nitrogen-containing compounds such as quaternary ammonium salts, betaines, and amine oxides have so far been known (JP-A-63-145205). It is known as well that among them, quaternized or further polyoxyethylenated long-chain amines are particularly effective (JP-A-4-211002, JP-A-2-295907, and JP-A-63-284106). However, the medicinal efficacy-enhancing effects of these compounds are not necessarily satisfactory, and a further improvement in the effect has been desired. Accordingly, in order to meet such the desire, the present inventors have proposed to use quaternary ammonium salts or tertiary amines or salts thereof in combination with chelating agents, as shown in WO95/17817 published in English on Jul. 6, 1995 corresponding to Japanese Patent Application No. 5-337502 filed on Dec. 28, 1993. In addition, WO92/12637 published Aug. 6, 1992 discloses a composition comprising glyphosate, an acid acceptor and a surfactant.
However, further investigations have resulted in clarifying that while this enhancer for agricultural chemicals shows marked enhancer effect to various agricultural chemicals, it is inferior in storage stability, particularly stability to a change in temperatures when it is stored in a liquid form over a long period of time. It has been clarified that this problem is serious particularly when using it in combination with bipyridinium series herbicides and the medicinal efficacies of bipyridinium series herbicides can not sufficiently be enhanced in some cases. Accordingly, it has become clear that such problems as described above have to be further improved.
DISCLOSURE OF THE INVENTION
Intensive researches made by the present inventors in order to obtain an enhancer for bipyridinium series herbicides which has a good stability to a change in temperatures even when it is stored in a liquid form over an extended period of time have resulted in finding that the intended liquid enhancer and liquid herbicide composition can be obtained by using a nitrogen-containing compound comprising specific tertiary amine and a derivative thereof in combination with oxalic acid or a specific oxalic acid salt, and thus completing the present invention.
That is, the present invention provides a liquid enhancer composition for bipyridinium series herbicides characterized by containing (1) at least one nitrogen-containing compound selected from tertiary amines represented by the following Formula (1) and derivatives thereof, and (2) at least one oxalic acid or salt thereof selected from the group consisting of oxalic acid, potassium oxalate, alkanolamine salts of oxalic acid, and lower alkylamine salts of oxalic acid, wherein the content of oxalic acid or a salt thereof is 0.1 to 10 times mole per mole of the nitrogen-containing compound described above: ##STR1## [wherein R.sup.1 : represents a linear or
REFERENCES:
Turner, D.J. et al., "Complexing Agents as Herbicide Additives," Weed Research, vol. 18, 1978, pp. 199-207.
Chemical Abstracts 86:84676 (1977).
Chemical Abstracts 67: 20913 (1967).
Chemical Abstracts 76: 122968 (1971).
Hasebe Keiko
Hioki Yuichi
Suzuki Tadayuki
Kao Corporation
Pak John
LandOfFree
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