HU183098B - Herbicide compositions containing inorganic salts and thiocarbamate derivatives as active agents - Google Patents

Abstract

The present invention relates to an herbicidal composition comprising an inorganic salt and a thiocarbamate derivative as active ingredient in an amount of from 0.1 to 95% by weight of a) sodium sulfate or potassium sulfate, and b) a thiocarbamate of formula I wherein R1 and R2 are the same and C1-4alkyl; R3 represents a mixture of 0.3: 1 to 3: 1 ethyl and optionally contains an Ν, Ν-diallyl dichloroacetamide antidote with one or more conventional carriers, preferably kaolin and / or diluent, preferably water or xylene and optionally emulsifying agent. - mixed with alkylbenzenesulfonic acid sodium.

Description

The present invention relates to a two-component herbicidal composition comprising an inorganic salt and a thiocarbamate derivative as an active ingredient.

More particularly, the invention relates to herbicidal compositions which are active ingredients

(a) sodium sulphate or potassium sulphate; and

b) a thiocarbamate of formula I wherein R 1 and R ₂ are the same and are a mixture of C 1 -C 4 alkyl and R _{3 is} ethyl and optionally contain a known antidote, preferably Ν, Ν-diallyl dichloroacetamide.

Besides the successes achieved, the chemicalisation of agriculture carries numerous dangers. These include environmental problems, soil contamination, which damages both beneficial soil organisms and, for example, rain, irrigation and some of the organic compounds with herbicidal activity in rivers (rivers, lakes, etc.) and fish stocks. etc. Therefore, in addition to the benefits of using herbicide organic compounds, it is necessary to simultaneously reduce the amount of herbicide compounds used as far as possible while maintaining at least the same herbicidal activity.

It has been found that mixing these known herbicidal organic compounds with sodium sulfate or potassium sulfate and using the mixture as a herbicide allows the phytotoxicity of the organic herbicide compound to be reduced, if not eliminated, by simply being available in a substantial amount. , inorganic salts. The inorganic salts may also optionally be used in the form of a hydrate. The herbicidal activity of the above mixture is increased synergistically, or at least to the same extent as with the same amount of the herbicidal organic compound used alone; crop plants grow more vigorously and produce significant surpluses. The use of the combined herbicidal composition according to the invention is significantly more economical than the use of organic compounds having herbicidal activity alone, which are often difficult to produce, often difficult to produce, since less or more of these can be replaced by commercially available inorganic salts. In addition, the herbicidal activity of the combination preparation by simple mixing is increased, at least not reduced, compared to the same amount of standard herbicidal organic compounds used alone.

A preferred representative of the thiocarbamates of formula (I) used as the herbicidal component in the herbicidal compositions of the present invention is

S-ethyl dipropylthiocarbamate (EPTC).

The herbicidal compositions of the present invention may contain mixtures of inorganic salts and organic compounds having a herbicidal action in a weight ratio of 0.3: 1 to 3: 1.

Mixtures of inorganic salts and organic compounds of herbicidal activity according to the invention (herbicidal active compound mixtures) can be used as herbicides after processing into formulations.

Mixtures of inorganic salts and organic compounds having a herbicidal action are prepared according to conventional methods. In these compositions, the herbicidal active compound mixture of the present invention is admixed with solid or liquid inert carriers or diluents and optionally other excipients or carriers.

Such excipients may be, for example, surfactants such as wetting, emulsifying and dispersing agents, anti-caking agents, lubricants, adhesives, adhesives, colorants, corrosion inhibitors, suspending agents, agents which are opposed to those in the treated area. or other biologically active substances and / or substances which maintain or enhance the biological activity.

Suitable solid carriers or diluents include inactive minerals such as aluminosilicate, talc, calcined magnesium oxide, diatomaceous earth, tricalcium phosphate, cork dust, carbon black, substances such as kaolin and bentonite, montmorillonite, diatomaceous earth, attapulgite, , calcium carbonate, mica, pyrophyllite, dolomite, gypsum, colloidal silica, Fiuller earth, Hewitt earth, porcelain earth, etc.

Suitable liquid carriers or diluents include aqueous, organic and / or aqueous-organic solvents such as water, ketones such as acetophenone, cyclohexanone, isophorone, aromatic hydrocarbons such as benzene, toluene, xylene, alkylnaphthalenes, tetrahydronaphthalene. , chlorinated hydrocarbons such as chlorobenzenes, ethylene dichloride, trichlorethylene tetrachloroethane, alcohols such as methanol, butanol, isopropyl alcohol, propylene glycol, diacetone alcohol, kerosene, mineral, animal and vegetable oils, aliphatic petroleum fractions, high aromatic petroleum distillates, eg. naphtha and distilled tar oil, polar organic solvents such as dimethylsulfoxide, dimethylformamide, and mixtures of the above liquids.

The wetting, dispersing and emulsifying surfactants used may be of the ionic or non-ionic type.

Nonionic agents include, for example, ethylene oxide having 10 to 20 carbon atoms in fatty alcohols such as oleyl alcohol, cetyl alcohol, octadecyl alcohol, or alkylphenols such as octylphenol, nonylphenol, octylcresol, or amines such as the condensation products of oleinamine with mercaptans such as dodecyl mercaptan or carboxylic acids and partial esters of long chain fatty acids and hexitan anhydrides, condensation products of the above partial esters with ethylene oxide, fatty acid esters of lecithins, polyalcohols and the like.

The ionic agents can be cationic or anionic.

Suitable cationic agents are, for example, quaternary ammonium compounds such as cetyltrimethylammonium bromide, cetyladinium bromide, dioxoethylbenzyldodecylammonium chloride and the like.

Suitable anionic agents are, for example, soaps,

183098 aliphatic monoesters of sulfuric salts, such as sodium lauryl sulfate, sodium salt of dodecyl-sulfuric acid ester, salts of sulphonated aromatic compounds, such as sodium dodecyl benzenesulfonate salts, · sodium, calcium, or ammonium sulphate ⁵ ligno-, butilnaftalin- sulfonate and mixtures of sodium salts of diisopropyl and triisopropylnaphthalenesulfonic acids, sodium salts of a petroleum sulfonic acid, or potassium or triethanolamine salts of oleic acid or abietic acid, and the like. ¹⁰

Suitable suspending agents are, for example, hydrophilic colloids such as polyvinylpyrrolidone, sodium carboxymethylcellulose, and plant gums such as acacia gum, tragacanth gum. ¹⁵

Suitable adhesives such as lubricants such as calcium or magnesium stearate, adhesives such as polyvinyl alcohol, cellulose derivatives or other colloidal materials such as casein or mineral oils.

Suitable dispersants are, for example, methylcellulose, lignin sulfonates, alkyl naphthalene sulfonates and the like.

Suitable dissipation, adhesion, rain resistance ²⁵ of confronts or additives that improve the bebatolóképességet as fatty acids, resins, glues, casein or alginates.

Hatóanyagkomponenseit composition of the invention can be converted into various solid, or liquid preparations hordozóanyagok- ³⁰ kai and excipients mentioned above.

Solid compositions include powders, preferably a wettable powder and / or dispersible powders, granules, granulates, pastes, etc. ^35.

Liquid formulations include solutions, direct spray solutions, either aqueous or organic solvent solutions including oily solutions and miscible oils, dispersions, suspensions, preferably aqueous suspensions, aqueous solutions, or oily emulsions, invert emulsions, etc.

For example, the powder formulations may be prepared by thoroughly mixing the mixture of the inorganic salt (s) and the organic compound (s) of herbicidal activity, hereinafter referred to as herbicidal active compound, with one of the inert solid carriers mentioned above.

Wettable or dispersible powders are prepared by mixing the herbicidal active compound of the present invention with one of the above-mentioned wetting or dispersing agents in addition to any inert solid carrier. 55

For example, granular compositions can be prepared by dissolving the herbicidal active compound mixture of the present invention in a solvent, in the presence of a binder, a particulate carrier such as porous granules such as pumice or attaclay, mineral non-porous granules such as sand. or applied to clay soil or organic granules such as black earth or cut tobacco stems, optionally dried. The granular composition can also be prepared by compressing the active ingredient mixture with powdered minerals in the presence of a lubricant and binder, cutting the compressed material and sifting it to the desired particle size. A preferred embodiment of the granular preparation is dry or wet granulation, which may be either wet granulation or structural granulation.

Aqueous solutions, dispersions, suspensions or emulsions are prepared by dissolving the herbicidal active compound mixture of the present invention in an organic solvent, optionally containing one or more wetting, dispersing, suspending or emulsifying agents, optionally adding to water, optionally it may also contain one or more wetting, dispersing or emulsifying agents.

Mixable oils are prepared by dissolving or finely distributing the herbicidal active compound mixture of the present invention in a suitable solvent, preferably slightly miscible with water, with the addition of an emulsifier.

Directly sprayable solutions are prepared by dissolving the herbicidal active compound mixture according to the invention in a solvent having a high or medium boiling point, preferably above 100 ° C.

An invert emulsion may be prepared by emulsifying water in an oily solution or suspension of the herbicidal active compound mixture of the present invention in water prior to or during spraying.

For the preparation of aqueous applications, it is particularly suitable to use high-concentration emulsion concentrates, pastes, wettable spray powders which can be diluted with water to the desired concentration before use. These concentrates are formulated so that they can be stored for an extended period of time and, after storage, dilute with water to form a homogeneous aqueous formulation that can be used with conventional spraying equipment. The concentrates generally contain from 10 to 85% by weight, preferably from 25 to 60% by weight; after this dilution, the aqueous preparation has an active ingredient content of 0.1 to 3.00% by weight.

The amount of herbicidal active compound mixture required to achieve the desired effect in the herbicidal compositions of the present invention may vary within wide limits, depending on the method of preparation and use, more particularly 0.1 to 95% by weight. In the so-called "ultra-low-volume" (ULV) application method, the herbicidal active compound mixture according to the invention can be used with very small amounts of additives, preferably 90-95% by weight, from very fine spraying equipment, preferably from airplanes. . In the case of diluted agents, the concentration may generally range from 0.1% to 20% by weight, and in the case of concentrated agents, from 20% to 95% by weight. The wettable powders contain, for example, 5 to 80% by weight, preferably

The emulsifiable concentrates may contain from 10 to 60% by weight, from 5 to 70% by weight, preferably from 10 to 50% by weight, and from 0.5 to 10% by weight in powder formulations, preferably from 1 to 5% by weight.

The herbicidal compositions according to the invention are as follows: 3

183 098 2 Spraying, dusting or spraying agents, soil irrigators, dip baths, etc. however, the type of preparation will always be selected according to the requirements of the intended use. 5

The herbicidal composition according to the invention is applied in a known manner to the soil and / or to the seeds and / or to the soil and / or to the plant and / or to certain parts of the plant.

For example, the treatment of the seeds may be carried out by coating the seeds with the herbicidal compound according to the invention, optionally with carriers, while mixing. The herbicidal mixture can also be applied to the seeds together with the above-mentioned surfactant wetting agents and optionally carriers. In this case, the mixture of the herbicidal active ingredient mixture, the surfactant and the carrier material is first moistened with a little water and then the seeds are mixed with the suspension.

The herbicidal active compound mixture of the present invention may also be applied to the furrow when sowing seeds, in the form of a powder mixture with sand, soil or a powdered solid carrier as mentioned above, optionally with one of the above-mentioned surfactants.

The herbicidal active compound mixture of the present invention may be applied to the seeds in the form of an aqueous spray before, during or after sowing, and optionally containing any of the above surfactant dispersants and / or powdered solid carriers.

The composition containing the herbicidal active compound mixture according to the invention is applied to the plant environment or to the plants, parts thereof such as leaves, for example by spraying, dusting or in the form of an aqueous spray, etc. or into the soil, for example by soil irrigation, flooding or incorporation into the soil, whereby the seeds ^{40 are} sown into the furrows in the treated soil.

The herbicidal compositions of the invention can be used to control both monocotyledonous and dicotyledonous weeds. The treatment can be carried out at pre-emergence (pre-emergence) or post-emergence (post-emergence) stage 45 or after incorporation into soil.

It has been found that the herbicidal composition according to the invention exerts a selective herbicidal activity in crop cultures, particularly in maize.

The dose of the herbicidal composition according to the invention required for a satisfactory effect depends on many factors, such as the species and condition of the crop to be treated, other plants growing in the vicinity of the crop to be treated, the type of herbicide to be controlled, the herbicidal composition. the season, the climatic conditions and the treatment before or after emergence of the plants or in the soil 60 and the application of the composition. Accordingly, the optimum dose is determined empirically in each case. Usually, however, 0.1 to 10 kg of active substance per hectare are applied. 65

The following examples illustrate the herbicidal composition of the present invention without limiting it.

Example 1

0.05 L of Eradicane *, a commercially available pesticide containing EPTC (S-ethyl dipropylthiocarbamate) and N, Ndialyl dichloroacetamide, was added to 10 L of water with stirring and then dissolved in 0.1 kg of sodium sulfate. The solution is used as a spray.

Example 2

S-ethyldiisobutylthiocarbamate 60.0%

K ₂ SO ₄ 30.0% kaolin 1.0% alkylbenzene sulfone iron sodium 1.0% sulfite lye powder 8.0%

The components are made into a wettable powder composition as described herein by homogenizing each component in a mixing drum and grinding it to a particle size of less than 200 µ.

The formulation is diluted with water to form a spray solution containing 0.2-5% of the active ingredient, according to the requirements of use.

Example 3

S-ethyldiopropylthiocarbamate 30%

Na ₂ SO ₄ 10% kaolin 50% colloidal silica 3% sulphite alkaline powder 7%

The above components were prepared as a wettable powder formulation as in the previous example and then sprayed.

Example 4 S-ethyl di-propyl thiocarbamate 10% Na ₂ SO ₄ 10% polyoxyethylene sorbitan monooleate 5% xylene 75%

The components are prepared as described herein to form an emulsion concentrate by dissolving the active compound and surfactant in xylene with vigorous mixing.

The composition is prepared by spraying with water in a known manner.

Example 5

S-ethyldiopropylthiocarbamate 15%

K ₂ SO ₄ 5%

-4183 098 polyoxyethylene sorbitan monooleate xylene

10%

60%

The above components were prepared as an emulsion concentrate as described in the previous example, followed by 5 sprays.

Example 6

Large plot experiment

The sandy loam and meadow loam soils on which maize was grown the previous year were harvested as follows: the stubble was dialed and then plowed with a double disc harrow of 25 cm deep plowing. The soil was sampled and fertilized with NPK 20 fertilizer equivalent to 260 kg N / ha, 98 kg P ₂ O ₅ / ha and 275 K ₂ O / ha in the autumn (October snow). In the spring of the experimental (next) year (at the end of March) the soil was leveled and then subjected to a combinatorial treatment (cultivator, soil comb clod).

The size of the experimental plots is 25 20 m ² x 250 m ² = 5 000 m ² = 0.5 ha. Next to the experimental plot was the control plot (denoted II), which was 100 mx 250 M = 25,000 m ² - 2.5 ha, which is the size of the five experimental plots taken together. 30

Prior to sowing, the soil was treated with a combination preparation of 7.2 kg / ha Eradicane ^R + 10 kg / ha of the plant growth regulator salts of the invention. The ^R Eradicane commercial circulating in pesticide compositions of El- ³⁵ name. This plant protection product contains the active substance EPTAN (EPTC: Cetyl dipropylthiocarbamate) and the antidote N, Ndiallyl dichloroacetamide.

A combination product according to the invention and ^R Eradicane or spray mixture was prepared from ⁴⁰ in a manner to separate the Eradicane was diluted and added to an aqueous solution of salts of the invention, the diluted permedéhez Eradicane ^R.

The total volume of the combination spray (Eradicane ^R and plant growth regulator salt) was 170 L / ha ⁴ , which was applied using a BIG-A sprayer.

The following plant growth regulating salts were applied to each experimental plot: _ _n

Parcel Name of salt

1/1 Na ₂ SO ₄

1/2 K ₂ SO _{4 55}

In October, the corn was harvested with a John Deern harvester. The moisture content of the grain maize was determined (35-39%) and with this the yield was converted to "May grits". The results are summarized in the table below.

Parcel yields over the average of the 2.5 ha control plot

Ϊ / Ϊ + 23.3%

1/2 + 19.6%

It can be seen from the table that the plant growth regulating salts according to the invention produce significant yields in the 0.5 ha large-cell experiments and the 2.5 ha controls. This result is all the more surprising because the composition of the sample taken before the autumn fertilization:

129 mg N / 100 g soil mg P ₂ 0 _5/100 g soil mg _K2O / 100 g soil and treated at such a high K ₂ O-containing soil fertilizer described in the beginning of Example quantity.

Comparing the results of the experiments with the results of experiments conducted one year earlier under completely different meteorological conditions, we find that they show a very high degree of agreement, proving the reproducibility of the experiments.

Claims (4)

CLAIMS 1. An herbicidal composition containing an inorganic salt and thiocarbamate derivatives as an active ingredient, characterized in that the active ingredient is present in an amount of 0.1 to 95% by weight. (a) sodium sulphate or potassium sulphate; and b) a thiocarbamate of formula (I) wherein R 1 and R ₂ are the same and are a C 1 -C 4 alkyl group, R _{3 is} ethyl-0.3: 1 to 3: 1, and optionally a known antidote, preferably N, N -diallyl dichloroacetamide with one or more conventional carriers, preferably kaolin, diluents preferably xylene, emulsifiers, dispersants, preferably fatty alcohol sulphonic acid sodium salts and / or adjuvants with other known compounds, or , 01 to 95% by weight. 2. The herbicidal composition of claim 1, wherein the thiocarbamate derivative is S-ethyl dipropylthiocarbamate (EPTC). Embodiment of the herbicidal composition according to claim 1 or 2, characterized in that the inorganic salt comprises sodium sulfate, optionally a hydrate thereof. An embodiment of the herbicidal composition according to claim 1 or 2, wherein the inorganic salt is potassium sulfate.