Plant protecting and regulating compositions – Plant growth regulating compositions
Patent
1997-02-27
1999-01-26
Clardy, S. Mark
Plant protecting and regulating compositions
Plant growth regulating compositions
504206, A01N 2502, A01N 5704
Patent
active
058638636
DESCRIPTION:
BRIEF SUMMARY
This application has been filed under 35 USC 371 as the national stage of international application PCT/JP46/01781, filed Jun. 27, 1996.
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 amino acid series herbicides, which is represented by glyphosate, 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 a 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 W095/17817 published in English on Jul. 6, 1995 corresponding to Japanese Patent Application No. 5-337502 filed on Dec. 28, 1993. In addition, W092/12637 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 a 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 amino acid series herbicides and the medicinal efficacies of amino acid 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 research has been made by the present inventors in order to obtain an enhancer for amino acid series herbicides which has good stability to changes 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 derivatives 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 amino acid 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
REFERENCES:
Research Disclosure No. 15334 pp. 35-36 Jan. 1997.
Wyrill, J. B. et al "Glyphosate Toxicity to Common Milkweed and Hemp Dogbane as Influenced by Surfactants". Weed Science. 25(3):275-287, May 1977.
Turner, D. J. "Effects on glyphosate performance of formulation, additives and mixing with other herbicides". Chapter 15 of The Herbicide Glyphosate, E. Grossbard et al, ed. Boston:Butterworths. pp. 221-240, 1985.
Hasebe Keiko
Hioki Yuichi
Suzuki Tadayuki
Clardy S. Mark
Kao Corporation
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