CS199368B1 - Desicantes - Google Patents

Description

The invention relates to combinations which are used as desiccants specifically for combating weeds and potatoes and forage crops.

Herbicides are described in the literature as having the following general formulas

(a) 1-aminoeyclohexanephosphonic acid diesters of general formula (I)

(I) wherein B * is methyl, ethyl and n-butyl and R ^{2 is} n-butyl and isohexyl.

b) unsymmetrically substituted cyanimidodithecarbonates of formula II

R ^P S (II),

R ⁴ S

199 368

199,369 wherein R ³ has the meaning methyl radical and R ⁴ n-butyl or allyl radical.

However, these compounds have a number of different effects or gaps in action due to their different properties. Thus, the compounds of the formulas I and II are ineffective against certain plant organs or are not sufficiently effective, for example in combating the stems of weed plants, or are toxicologically opposed to practical use, in particular of the compounds of the formula II.

The object and purpose of the invention is now to find! herbicides which are useful as desiccants, but which may be only slightly toxic and which are used with as little as possible.

According to the invention, this object is achieved by the fact that the combination of berbioids for combating weeds in potatoes and seed stands contains very customary excipients and carriers as active ingredient a mixture consisting of diesters of 1-amino-cyclohexanephosphonic acid of the general formula I

P in which R represents methyl, ethyl and n-butyl and R α-butyl and isohexyl, or salts thereof, and from asymmetrically substituted cyanimidodothiocarbonates of the general formula II

R ³ S

OeN-OaN (II)

R ⁴ S wherein R ³ is a methyl radical and R ^{4 is a} k-butyl radical or an allyl radical, the weight ratio of diesters of 1-aminocyclohexanephosphonic acid to cyanimidodithecarbonates being 3 to 1 to 1 to 1.

The ratios of the mixture of diesters of phosphonic acid to cyanimidodithium carbonate in the range of from 3 to 1 to 1 have proved to be advantageous for use as desiccants in seed spaces and for weed control in potatoes.

It has been found that the combinations according to the invention have a considerably better performance than would be expected from the sum of the effects of the individual components. Tlm also gives the possibility to reduce the amount of substance used per ha, which is both toxicologically and economically advantageous. The synergism found in this combination, applied as a formulaoe or tank mix, will be explained in more detail below by means of the following examples.

199 398

Example 1

For harvesting ripened potatoes in field stands, in which about 10% of the leaves turned yellow, were sprayed with combinations according to the invention which were formulated as 50% emulsion concentrates or as a tank mix in 600 l of water / ha in the quantities used. · The experiments were carried out at the insect sites, at different potato varieties and at different climatic conditions. Bonitation was performed after 5, 8 and 12 days according to values 1 to 9 separately according to leaf and stem, with 9 = complete killing and 1 = undamaged. The quantities used by the current partners of the combination were used for comparison.

The results are shown in Table I.

Example 2

Red clover seed stands, in which 90% of the sticks were brown colored, were sprayed with the combinations according to the invention, which were formulated as 50% emulation concentrates or as a tank mix in 600 l of water / ha on the stand using the amounts given in Table II. . Experiments were carried out at several sites. Bonitation was performed after 5, 8 and 12 days according to leaf and stem, with 9 indicating complete killing and 1 indicating undamaged.

The corresponding amounts of the present components of the combination were used for comparison. The results of the red clover experiments are shown in Table II.

Explanation on Tables I and II

1-n-Butylaminocyclohexanephosphonic acid β-dibutyl ester

B with 1-methylaminocyclohexanephosphonic acid dilsohexyl ester = 1-ethylaminooyclohexanephosphonic acid diisohexyl ester

D with methyl-n-butylcyanimidodithium carbonate

E _and methylallylcyanimidodithium carbonate

Bl and leaf

St = stem

Table I

Killing weeds in potato stands

preparation, event. combination used quantities kg AS / ha 5 · day bonitace Day 8 12. Bl day St Bl St Bl St untreated - 1 1 1 1 1 1 AND 4 7 2 7 2 7 2 AND 6 7 ‘2 7 2 7 5 AND 8 8 2 8 5 9 6 (B) 4 7 2 7 2 7 2 (B) 6 7 2 7 2 7 5 (B) 8 8 3 ' 8 5 9 6

199 399

preparation, event. combination used quantities kg AS / ha 5. Bl day St bonitáce 8 «den 12. Bl day St Bl St 0 4 7 2 7 2 7 2 C 6 8 3 8 3 6 6 C 8 8 3 8 9 7 D 2 8 2 8 9 2 D 4 9 3 9 4 9 7 D 10 9 6 9 7 9 8 E 2 7 2 7 2 7 2 E 4 9 4 9 4 9 7 E ¹⁰ 9 7 9 7 9 8 A + D 4 + 2 8 4 8 4 9 8 A + D 4 + 4 9 6 9 7 9 9 A + D 6 + 2 8 5 8 5 9 8 A + D 6 + 4 9 7 9 7 9 9 A + E 4 + 2 8 5 8 5 9 8 A + E 4 + 4 9 6 9 7 9 9 A + E 6 + 2 8 6 8 6 9 8 A + E 6 + 4 9 7 9 7 9 9 B + D 4 + 2 8 4 8 4 9 8 B + D 4 + 4 9 6 9 7 9 9 B + D 6 + 2 8 5 8 5 9 8 B + D 6 + 4 9 7 9 7 9 9 B + B 4 + 2 8 4 8 5 9 8 B + E 4 + 4 9 6 9 7 9 9 B + E 4 + 4 9 6 9 7 9 9 B + E 6 + 2 8 6 8 6 9 8 B + E 6 + 4 9 7 9 7 9 9 C + D 4 + 2 8 4 8 4 9 8 C + D 4 + 4 9 6 9 7 9 9 C + D 6 + 2 8 5 8 5 9 8 C + D 6 + 4 9 7 9 7 9 9 C + E 4 + 2 8 4 8 5 9 8 C + E 4 + 4 9 6 9 7 9 9 C + E 6 + 2 8 6 8 6 9 8 C + E 6 + 4 9 7 9 7 9 9

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Table II

Red shamrock desiccants

preparation, event. combination used quantities kg AS / ha 5 · Bl dea St bonitace Day 8 Day 12 Bl St Bl St untreated - 1 1 1 1 1 1 AND 4 7 2 7 -3 8 6 AND 6 8 2 8 4 9 8 AND 8 9 7 9 8 9 9 0 4 7 2 7 3 8 2 0 6 8 2 8 2 8 4 0 8 9 5 9 5 9 8 D 2 7 1 7 1 8 1 D 4 9 3 9 4 9 7 D 10 9 6 9 7 9 8 E 2 7 1 7 1 8 1 E 4 9 3 9 4 9 7 E 10 9 6 9 7 9 8 ' A + D 4 + 2 8 5 8 5 9 8 A + D 4 + 4 9 6 9 7 9 9 A + D 6 4 2 8 6 8 6 9 8 A + D 6 + 4 9 7 9 7 9 9 A + E 4 + 2 8 5 8 5 9 8 A + E 4 + 4 9 6 9 6 9 9 A + E 6 + 2 8 6 8 6 9 8 A + E 6 + 4 9 7 9 7 9 9 C + D 4 + 2 8 5 8 5 9 8 C + D 4 + 4 9 6 9 7 9 9 C + D 6 + 2 8 6 8 6 9 8 C + D 6 + 4 9 7 9 7 9 9 C + E 4 + 2 8 5 8 5 9 8 C + E 4 + 4 9 6 9 6 9 9 C + E 6 + 2 8 6 8 6 9 8 σ + E 6 + 4 9 7 9 7 9 9

Claims (1)

Float control agents for potatoes and seed stands, characterized in that they contain, as active ingredient, a mixture consisting of diesters of 1-amineoyclohexanephosphonic acid obeonic acid of the formula I (I). wherein R ¹ is a methyl, ethyl or n-butyl radical and R ^{2 is an} n-butyl or isohexyl radical, and unsymmetrically substituted cyanimidodithium carbonates of formula II R ⁵ S R (II) wherein R represents a methyl radical and R ⁴ n-butyl or allyl radical, the weight ratio of diester 1-aminooyklohexanfosfonovó kyanimidodithiouhličitanům acid to is from 3: 1 to l ka first