Chemistry: fertilizers – Processes and products – Forms or conditioning
Patent
1981-08-25
1984-05-01
Mills, Catherine L.
Chemistry: fertilizers
Processes and products
Forms or conditioning
71114, 71117, A01N 3710
Patent
active
044459270
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The invention relates to herbicidal compositions containing N-(phosphonomethyl)-glycine or a non-phytotoxic salt thereof, in combination with 2,4-dichlorophenoxyacetic acid or .alpha.-naphthylacetic acid or a non-phytotoxic salt of these compounds.
BACKGROUND ART
It is well known from the literature that N-(phosphonomethyl)-glycine can successfully be used for combatting weeds, especially perennial, deeply rooted weeds, but is effective also as a total plant killer U.S. Pat. No. 3,799,758.
2,4-Dichlorophenoxyacetic acid and .alpha.-naphthylacetic acid are also known in the art.
It is the object of the present invention to provide combinations, in which, as a result of using further additives, the herbicidally effective amount of N-(phosphonomethyl)-glycine can considerably be reduced in comparison with the herbicidally effective amount of N-(phosphonomethyl)-glycine in compositions, which contain this compound alone.
DISCLOSURE OF THE INVENTION
The present invention relates to herbicidal compositions comprising a combination of N-(phosphonomethyl)-glycine and 2,4-dichlorophonoxyacetic acid or .alpha.-naphthylacetic acid or a non-phytotoxic salt of these compounds, in an effective amount.
The present invention is based on the recognition that the herbicidally effective amount of N-(phosphonomethyl)-glycine or a salt thereof can considerably be reduced by using it in combination with 2,4-dichlorophenoxyacetic acid or a non-phytotoxic salt of these compounds.
Non-phytotoxic salts of N-(phosphonomethyl)-glycine preferably include alkyl amine salts, preferably having from 1 to 4 carbon atoms.
The preferred salts of 2,4-dichlorophenoxyacetic acid also include alkyl amine salts, preferably having from 1 to 4 carbon atoms, e.g. isopropyl amine, dimethyl amine salts, etc., but other salts, e.g. alkali metal, alkali earth metal salts can also be used.
The herbicidal compositions containing N-(phosphonomethyl)-glycine as active ingredient are commercially available generally as emulsifiable concentrates containing 30 to 36% by weight of active ingredient. They are generally employed at a rate of 10 lit./ha.
The compositions according to the invention contain from 0.01 to 95% by weight of the herbicidally active combination and 5 to 99.9% by weight of one or more formulation acids.
The total active ingredient concentration preferably is between 0.1 to 85% by weight, more preferably between 1 and 40% weight.
The proportion of N-(phosphonomethyl)-glycine to 2,4-dichlorophenoxyacetic acid or .alpha.-naphthylacetic acid can be varied within a wide range. The weight ratio of N-(phosphonomethyl)-glycine or a salt thereof to dichlorophenoxyacetic acid or a salt thereof preferably is between 5:1 and 1:5, more preferably between 4:1 and 1:2.
The proportion of N-(phosphonomethyl)-glycine or a salt thereof to .alpha.-naphthylacetic acid or a salt thereof preferably is between 2:1 and 5:1.
Is has surprisingly been found that of the herbicidal compositions according to the invention a smaller amount is required to obtain the same herbicidal effect than of the commercially available compositions, which contain N-(phosphonomethyl)-glycine as a sole active ingredient. In this way N-(phosphonomethyl)-glycine can partly be replaced by other agricultural chemicals and its effectivity can be increased.
The formulation aids usable in the compositions according to the invention are additives generally applied in the preparation of herbicides and described in detail in numerous textbooks. The formulation aids may for example be inert solid or liquid carriers, diluents, surfactants, e.g. dispersing and emulsifying agents, wetting agents, adhesives, etc.
As diluents for example various hydrocarbon derivatives, mineral oil fractions, vegetable and animal oils, polar solvents, water, etc. can be used. By using these formulation aids the compositions may conveniently be formulated as solutions, emulsions and dispersions.
The compositions according to the invention may also be formulated as concentrates, which can be dilute
REFERENCES:
patent: 3799758 (1974-03-01), Franz
Baracskai Jozsef
Fodor Ferenc
Gaal Antal
Gimesi Antal
Horvath Andras
Mills Catherine L.
Nitrokemia Ipartelepek
Novenyvedelmi Kutato Intezet
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