CS251486B1 - Combined herbicidal preparation - Google Patents

Abstract

Combined herbicidal preparation based on 2-methyl-4-chlorophenoxyacetic acid (MCPA), 2-(2-methyl-4-chlorophenoxy)-propionic acid in salt form (MCPP) and 2-ethylamino-4-methylthio-6-tert.butylamino-1,3,-5-triazine finalized into a stable aqueous suspension containing]' 35 to ©0% by weight of active ingredients, polysaccharide obtained by culturing microorganisms of the Xanthomonas family, formaldehyde, ethylene glycol and surfactants.

Description

251486

BACKGROUND OF THE INVENTION The present invention relates to a combined herbicidal composition based on 2-methyl-4-chlorophenoxyacetic acid (MCPA) active ingredient in the salt form of 2- (2-methyl-4-chlorophenoxy) propionic acid (MCPP) and 2-ethylamino-4-methylthio-6-tert-butylamino-1,3,5-friazine (terhutrin I finalized to form a stable suspension of aqueous suspension).

Podlá dosia! 2-methylenenoxyacetic acid (MCPA) is produced in the form of sodium, potassium and potassium, or ammonium, but diimethyl amine, dissolved in water, and the solutions are herbicidal base active agents (MCPA) Dikolen I, Aminex pur.

Sodium, ammonium, potassium salt of 2- (2-methyl-4-chlorophenoxy-propionic acid) is also prepared in a similar manner. These solutions are used as herbicides.

Terhutrin, t.]. 2-ethylamino-4-iinomethyl, thio-6-tert-butylamino-1,3,5-triazine is finalized by the known processes for formulating dispersible powder, such as Dikogrenin N, Igran 80, Topogard 50 WP.

The use of a combination of active ingredients in agriculture requires the subsequent application of MCPA, MCPP, terbutrin, which is a disadvantage. A further disadvantage is that terhutrin, which has so far been finalized in the form of a dispersible powder, requires manipulation with the pesticide powder. The subsequent application of the three active labs does not ensure either homogeneity or optimum adherence to the desired active ingredient ratio.

It has now been found that it is possible to prepare a herbicidal preparation based on MCPA, MCPPi terbutrin in the form of a stable aqueous sus-pension. This form of the combined herbicidal composition contains both MCPA and MCPP in the form of a salt which is dissolved in water and also contains terhutrin, which is knowly insoluble but stabilized in the solution of said active substances by means of surfactants, polysaccharide and formaldehyde and ethylene glycol, a stable aqueous suspension.

The present invention provides a combined herbicidal composition comprising 2-methyl-4-chlorophenoxyacetic acid (MCPA), 2- (2-methyl-4-chlorophenoxy-propionic acid (MCPP) and 2-ethylamino-4-methylthio-6- t-butylamine-1,3,5-triazine, starting from an aqueous solution of 2-methylphenoxyacetic acid salt containing 10 to 30% by weight of active ingredient, and adding a solution of MCPP salt or stirring to the mixture. directly 2- (2-methyl-4-chlorophenoxy-propionic acid in an amount of 10 to 30% by weight). Further, the MCPP is neutralized with alkaline hydroxide to pH 7-8. % by weight of polysaccharide obtained by culturing microorganisms of the genus Xanthmonmonas and 0.1 to 1% by weight of formaldehyde, and finally 2-ethylamino-4-methylthio-6-tert-butylamino-1,3,5-triazine and the reaction It was found that the polysaccharide can be added only after the active compounds have been milled in the mold. The reaction mixture is homogenised after grinding. Ethylene glycol as well as nonionic surfactants can be added to the reaction mixture to improve suspension stability and storage. The addition of ethylene glycol is added in an amount of 0.2 to 8 per cent relative to the resulting reaction. The surfactants can be added in an amount of 0.1 to 1% of a non-ionic emulsifier, e.g. Slovanik M 640, made by oxethylation of higher fatty alcohol 0.05 to 1% of a nonionic surfactant, e.g. and ethylene oxide.

It has been found to be advantageous to add the polysaccharide (radopol) to the mixture in the form of an aqueous solution after milling the active ingredients. Experiments were conducted in which surfactants were not added to the finalization process to achieve the desired suspension stability of the formulation.

The following examples illustrate the invention: Example 1

To 168 ml of water was charged 168 g (98%) of 2-methyl-4-chlorophenoxyacetic acid MCPA and 2-methyl-4-chlorophenoxypropionic acid MCPP '240 g - 97.8%.

The two active substances were suspended with stirring. Next, 70 g of NaOH in 200 ml of water was added to correct the pH of the medium to a value of 7. With successive stirring, 5 g of the Rodiopol polysaccharide was added in small portions. The suspension was stirred for 30 minutes. Finally, 3 g formaldehyde and 135 g (80%) 2-ethylamino-4-methylthio-6-tert-butylamino-1,3,5-trtazine (teijbutriene) were added. The reaction mixture was wet-milled and vigorously stirred for 2 hours. Analysis of the sample found: 158.7 g / L MCPA, 238.2 g / L MCPP, 1% suspension had 93.5%, for 5% solution was suspension stability 86.65% after 30 minutes. Example 2

To 185 ml of water was charged 185 g of technical MCPA 90% and 240 g of MCPP, further added to the resulting suspension a defective solution formed by dissolving 5 g of Rodopol in 50 ml of water and 3 g of formaldehyde. Next, 72 g of NaOH in 200 ml of water was added to reach pH = 7. 135 grams (80%) of terbutrin were added to the stable suspension. Reaction mixture

Claims (2)

251486 • 5 Ba intensively stirred for 2 hours. The resulting herbicidal formulation contained: 158.5 g / l ΜΟΡΑ, 235.2 g / l MCPP, 129.7 g / l tenbutrin, with a suspension stability of 1% solution being 94%. EXAMPLE 3 The procedure was the same as in Test No. 1, but 5 g of ethylene glycol, 0.3 g of Slovazol SFa and 0.2 g of Slavicum M 640 were added to the reaction mixture. The reaction mixture was stirred for 40 minutes and analyzed. the stability of 1% solution was 98%. The combined herbicidal preparation for the active substances MCPA, MCPP and the tert-butene-treated dispersible concentrate is a novel herbicide with enhanced efficacy. The novel combined herbicidal composition, in accordance with the subject matter of the invention, provides enhanced efficacy compared to the formulations used and the formulation preparations. For example, it has a broader spectrum of herbicidal activity on Limegrass compared to Dicofgren N (MCPA, terbutrin, has a broad spectrum of activity on the beaver, compared to Anitéin I (MCPA, di-camba, flurenol)). MCPA, MCPP, and terbutrin can be used to protect winter cereals from undersea, rooted in dicotyledonous bacilli, including those that are resistant to MCPA, such as the rotundum and the lipcaid, with a side effect on the whiskers. The combined herbicide formulation includes a life expectancy of MCPA, a progressive final treatment that improves product quality, a broader spectrum of herbicidal activity over Dicogrene N and Antenna I. Dispersant concentrate also improves the conditions for handling the formulation when applied from fortification hygiene and culture of work and a higher biological effect as a result of a better homogeneity of the herbicidal composition compared to single-component final preparations. SUBSTANCE A combined herbicidal formulation in the form of a dispersible concentrate, characterized in that it comprises: 10 to 30 wt. 2-methyl-4-chloro-methoxy-acetic acid in the form of an aqueous solution of inorganic or organic salts, 10 to 30 wt. 2- (2-methyl-4-chlorophenoxypropionic acid salt, 10-30 wt.% 2-ethylamino- (4-mefylthio) -6-tert-butylamine-1,3,5- triazine, 0.1 to 3% by weight of a polysaccharide obtained by culturing microorganisms of the genus Xantho-monas, 0.1 to 1% by weight of formaldehyde, 0.2 to 8% by weight of ethylene glycol, 0.1 to 1% by weight of non-ionic emulsifier produced by oxyethylation higher fatty alcohols, 0.1 to 1% by weight of the surfactant of the nonionic thiazide group, which is a copolymer of propylene oxide and ethylene oxide, the remainder being 100% by weight of water.