DE1767528A1 - Herbicidal Mixtures - Google Patents

Description

PATENT LAWYERS

DR.-ING. BY KREISLER DR.-ING. SCHONWALD DR.-ING. TH. MEYER DR. FUES

COLOGNE 1, DEICHMANNHAUS 1767528

Cologne, 15-5.1968 Kl / Ax

Richard Brian Warner, Great Ness, Baschurch, Shropshire (England).

Herbicide Gerniche

The invention relates to a herbicidal preparation which is effective against couch grass (Agropyron repens) and is more effective has been known as a herbicide and is economical to use.

It has been found that "a mixture of trichloroacetic acid in free form or in salt form and 3> -amino-1,2,4-triazole or a salt of 3-amino-1,2,4-triazole in the presence of an alkali metal thiocyanate, in particular Sodium thiocyanate, is more effective against mercury than the first two compounds mentioned alone, even in the presence of thiocyanate, and that the action of one compound is intensified by the action of the other compound, ie the compounds act synergistically.

Accordingly, the subject matter of the invention is a preparation which is effective as a herb, in particular against couch grass, which contains a mixture of trichloroacetic acid or a salt of trichloro- eesigeMure and 3-amino-1, 2,4-triazole or a salt of 3-amino-1, 2, 4-triazole together with an alkali thiocyanate, especially sodium thiocyanate.

j5-Amino-i, 2,4-triazole has the formula

109839/1653 _ÖA o original

NH ₂

The invention also relates to a method of inhibition or reduction in the growth of couch grass, which is characterized by the fact that one touches the couch grass or the ground, in which the growth of couch grass is expected, an effective amount of a mixture of trichloroacetic acid or a salt of trichloroacetic acid and 3-amino-1,2,4-triazole or a salt of 3-amino-1,2,4-triazole in the presence of a Alkali thiocyanate, especially sodium thiocyanate, applies.

The ratio of the trichloroacetic acid component to the 3-amino-1,2,4-triazole component in the preparation can be varied as desired, but is preferably in the range of 2: 1 to 20: 1. A ratio is particularly preferred from 4: 1. All ratios are based on weight. The amount of thiocyanate, especially sodium thlocyanate, can range from 0.5 to 2.0 parts per part of the triazole component.

W The preparation can have any shape that is suitable for use in agricultural cultivation methods. For example, scattering agents (granules), dusts (powder form) and sprays and sprays, ie the liquid form, etc. The preparation generally contains a carrier material for the active ingredients. This carrier can itself be an active ingredient in the sense that it exerts an influence on the treated area. For example, it can be a fertilizer, especially a phosphate or nitrogen fertilizer, or an additional herbicide, such as sodium chlorate or "Dalapon", ie the sodium salt of

109839/1653

HAD ORiGJNAL

α, α-dichloropropionic acid or the like, or an inert substance, ζ.B. Kaolin or sand, or a blowing agent or a liquid carrier material such as water.

According to a preferred embodiment according to the invention, the preparation contains a phosphate fertilizer and a potash fertilizer. Such a preparation is particularly suitable for cultivating the soil in autumn, since autumn fertilization can be combined with the control of couch grass and spring fertilization, which usually includes a treatment with nitrates, can be carried out separately. The preparation with added nitrates is particularly suitable for the spring order · M

When treating the soil with a preparation according to the invention, the active ingredients are preferably incorporated into the soil the cultivator or by "rotavation" after application incorporated on the surface.

It has been found that by using the combination of the two compounds trichloroacetic acid and 3-amino-1,2,4-triazole in the presence of thiocyanate, especially sodium thiooyanate, it is possible to destroy or reduce the growth of the couch grasses by far greater than when using the sole alone To achieve application of these compounds. For example, in a field test - it was found that the preparation has a stronger effect with regard to the destruction or growth reduction of couch grass than would be expected if their effects were merely added together.

You trichloroacetic acid component of the preparation according to the Invention is preferably in salt form, in particular as that commercially under the name "Tecane" (Hoechst A «G ·) available sodium salt is used. 3-amino-1,2,4-triazole is commercially available and can be used as such or in salt form, e.g., the hydrochloride.

1 09839/1653

The separate use of trichloroacetic acid and j5-Amino-l, 2,4-triazole (in the presence of the thiocyanate) as Herbicide for the treatment of grasses has already been described, but the applicant noted that there is a very pronounced synergistic effect of one component on the other in the treatment of couch grass completely surprising.

The preparation according to the invention is particularly advantageous and effective as a herbicide in the control of couch grass, However, it also has herbicidal effects against other grasses and wild oats. The following example illustrates the Invention:

A preparation according to the invention is made from the following components:

Trichloroacetic acid (as sodium salt) 80 kg

Sodium thiocyanate 20 kg

3-amino-1,2,4-triazole 20 kg

Phosphate fertilizer 1120 kg

Potash fertilizer 1120 kg

When this mixture is in the amount of 250 kg / hectare fc is applied, it effectively prevents the growth of Couch grass and provides sufficient autumn fertilization.

109839/1653

BATH ORIGINAL

Claims (7)

1767522 P a t e i; t a η s η r U ζ h e 1) Herbicidal Geraische, characterized by ei nt * η Gohalt ar. Ti-iohloreüc'.gsäui'e or one ;, their oalze, ^ -Ar:; ino-i, n, 'i ~ . triazole or one ', .- its salts and one. Alkalith'-ocyaiia 2) mixture according to claim 1, characterized by a geaal of l-iatriuiuthiocyanate. j;) Genically according to claims 1 or 2, ^ ckounzeiohx.et by a content of llatriuwsalz of Trichi resalzäure. ^ i-) Gordian according to claims 1 to ^, _o ül: crü.zeic: i.et durjh ei content of the hydr ^ chloride of 3-anir-ol, 2,4-t: i.'i & zwl ·. 5) Gomisch i ^ ach claims 1 to ^! r, ^^^ drawn by ei :. Weight ratio of trichioresic acid to triazole components in a range of 2: 1 to 20: 1. 6) mixture na ei claim 5j cei-önrizeicl-not d '-. Raw a Ceuiaht ratio of trichloroacetic acid :: u l'riazci of 4: 1, 7) Mixture according to claims 1 to c, _w j ^ o .nzeicluiet by eli. Content of 0, f> to 2 Ge ;; .- parts au Thiciiya.-atküh-.pcneritu pi'o Gev; .- part Triazolkor.poneriue. C) Ger.; Isv3ii according to Ansorüohen 1 to T,; e _: .. ^ .- rolol.r-et by el .. susätclijhSi, content of e ^T -u, j.-: Phos: \ sz unr ¹ /: ίΊϊ: 'Kai 1 elün ;; ir or i'ItratdUnger . 109839/1653 BATH ORIGINAL