DE1909034A1 - Weedkillers - Google Patents

Description

(For this anme idling you will take priority out of the bri table registration TTo., 9231/63 of February 26, 1968 used) ■ '. "" .-

The invention relates to a. new "herbicide in solid form, especially one used as a herbicide v / irkaatnes solid salt of 2,4-DiohlorplienOxypropionäure, which hereinafter as 2, .A-D? denotes \: ird.

It is generally known that Galae and Eater of the 2,4-DP are effective ilorbiside, ie X ^T nkrautböki? I; ipfun.gsmittol, which are widely used in agriculture, mainly in ^one form Konaentricrter aqueous "" solutions of the ICa-

2-3 ± ~ r IDinsatp bsv /. Yortrio'b "of these solutions, however, Y? Rnchie-deno problems arise, so ζ. ~ ° -. The .question how the empty-smoked ^';. ~ feii The packaging material must "either infolgedessOn sur ^ C-goschickt odor in sufficient T. ^r else be serstört; the lctn gate is difficult precisely because it is

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packing material usually, in glass containers and barrels /. acts,. -, ■:;.; - ■ ''

Another problem is economic, wöil Gfes and Metal are relatively expensive packaging materials as well Have the IT disadvantage of being quite heavy «By the high weight increases the transport and return costs further. ; ·.

A third problem arises from the risk of Kristäilisation to which can occur when the concentrated solutions; ■ - gen.während of storage are subjected to cooling; Once crystallization has occurred / so the / "feathers dissolution is difficult, on every 3? All lengthy, · with metal containers it is possible that the crystallization is only noticed when a considerable part of the solution has already been used up. This leads then again it goes without saying that the "amount of active agent applied per square unit is indefinite and possibly insufficient for a particular purpose. .-.- ■

As a result, the development is aimed at bringing Unl: r.aiitb "ekänpfurigs. -mittel in] orm solid powder onto the market, which are then dissolved by the consumer in ^T. " Vats. Sole powders can be packed in paper or plastic bags, which can easily be disposed of by incineration. .. 'örden; • Finally, the risk of uncontrolled: crystallization is eliminated. -. V '-. "

Weedkillers can also be easily removed without pests significant increase in costs in smaller! -! narrow äbpacl-ön, whereby the exact dosage is simplified. . . . ! '

So far, the solid hemorrhoidal. and potassium salts the 2,4-DP uses which are a little "difficult to manufacture." and which crystallize very slowly. This ÄlkäliQalae

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are very hygroscopic, so that "special measures are taken need to keep the moisture in. the rooms where the Salts packed and stored v / ground to keep low. In addition, waterproof covers must be used. because otherwise the salts will stick together during storage and will then be difficult to dissolve.

It has now been found that the ammonium salt of 2,4-dichlorophenoxyproplic acid, which - as far as is known - has not yet been described in the literature, can be easily prepared by neutralizing the acid with ammonia: -; the salt crystallizes easily and the solid crystalline salt is far less hygroscopic than the sodium and potassium salts, so that it can be packed and stored without any special precautions and it can be packed in cheap packaging material . .; ■■ :. ^: . - "- ■ .-- ■ ... '■" - ■ "- ■■;.' ■ .-. ■ - ■; ■. ■

The invention accordingly relates to weedkillers, which consist entirely or partially of the solid crystalline ammonium salt of dichlorophenoxypropionic acid

Since the ammonium salt dissolves easily and quickly, can Easily prepare spray solutions for weed control from it, even using fairly cold ones Water what in the preparation of the solutions in the early stages .Spring can be important.

Since ammonia has a very low equivalent weight, contains the Sals according to the invention has a correspondingly high percentage Percentage of herbicidal 2,4-DP; it is as a result In fact, cheaper than any other ease used to make a 2,4-DP salt with a given herbicidal Effect has been drawn in *

The salts and thirds of the 2,4-DP are used in particular to control Voselmiere (Stelläria media) and Plohlnöterich (Polyconum persicäria) in cereals and grasses, because these criteria ^: "- £ e-gen the" usual \ '/ ice desolate. Weedkillers from [DyD of phenosyacetic acid - are insensitive. : - ■ 909837/1582 ^; SSOif ■■ ■ ■ ■

In order to show the effect of the salt according to the invention, are Experiments have been carried out in which his! Tirlatng with the, Effect of known potassium and methylamine salts of the 2-, 4-D- ver; was resembled. _ "." .-- ■ - "■ -

miner diener experiments were carried out in a barley field, which had been sown in April on a loamy soil. On the 31st shark, when the growth TDeSPrUlIt-WUrUe, had the barley a length of 20 "to 25 cm and" was just beginning the stretching period. The weeds were ha up t- " mainly around chickweed about 10 cm in length and jlohknöterioh about 10 to 15 cu in length.

Four pieces with a size of 50 m " each were then sprayed, one each with a potassium, methylamine and ammonium

P salslösuiig in an amount corresponding to 1 kg of 2,4-DP per 10,000 m "; the concentration of the aqueous solutions was 0.2-5; percent by weight.

The herbicidal Ifirkuiig \ mrde determined on June 30th; the income vmrden determined on August 21. The results are summarized in the following table. ■ ·

salt

Herbicides
in -J Effect- Income ■ erhoti.il
■ :. He-
.trliße bird
miere Flea ^ -
knotich ia.tüq
, 10.0OC 5 per
3 sqm 100 ^ 100; i 4 ^ 2 ^: ■ 2.0 100 f. 99.5 years 42.0 ; - 0.2 100 · ' too i> 0-, 1 O "O 42 * 2 ". Ό

Ammotiiuta
potassium
Methjrlamine
control

A. Another experiment was carried out in an Ilafer field, which was sown in April on a loamy, humus-rich soil. The spraying was carried out as with the first above described experiment.

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BATH ORIGINAL

~ ⁵ "1309034

At the time of spraying, the oats were about 25 cm and was just at the beginning of the fltreek period. In this pail, too, the main weeds were tim ¥ ogelmiere Lind Plohlaiöterich, which has a length of 10 and 15 cm respectively.

The herbicidal activity was determined on July 1st; the yields were balanced on August 24th. The results are as follows compiled in tabular form,

Herbicides
in p Effect Income Increased
Income 3.1 GaIi ζ bird
miere Ploh-
kiiotterich in hectok] l) gi? amm
per 10,000 sqm 2.3 ammonium 98.5; ' 99.5 Γ ' 42 _f 7 1.8 EaIium 90.5 ■ '- 99.0 '// 41.9 O Methylamine 99 _S °; ' 99.5? ' 4-1.4 control O O ■? F) .6

It can be seen from the tables that the ammonium salt is extremely effective against yogoln ^ ere and that the ammonium salt is the same as the usual zaliuras used for the " ⁵ ccGii Sv / ecl: onirat .. but increased in both Yerauchou grain produce of Da achieved by dasOesprühen with a ITn ^ rn-jitbGkr.rrf-fungainittel in particular, increase the yield - 'to earth by the struggle of Hutzpflanzen with l ^{T nkr;} I.I'. tc ?? n to light, '.fasser and Hahrung off v / ill, ¹ ^ - ¹ J c * ie increase in income in "Verv / ending of the ammonium salt a uoitorer advantage. ·

Sc is also known that the 2,4-DP pre- ^ r.rate für'die treated PfIaακοή not completely harmless are; it is therefore surprising and unexpected Property of the ammonium salt that it is obtained from useful plants boncor will perform. · ■. ■■

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Claims (1)

DIPL-INO. O. IL KRiSTZSCHMAR. | g _Q fM4 »hM ^ »ATBNTANWALT *» L ' - EU? a «67« 3 Eemisl: Yaerk E ^ ge A / S 21 "February 19 & 9 011) y Lyng
E φ ge / Da Aav / old file: 3393 Pateatan s priicb. ... ■■ ": ■ - ■■""" ..,. " ■ Fnkraiittiekämpfuassniittel, gana or partially "bestelienü dom ammonium sala of ^^ - 909837/1562 tONTIN. 91IISKI1 BANB. KOHTS-WB. 8499 - fOlTICRI »HAMBtf'KB MB. · »*.» ■ **