Herbicide compound

FIELD: agriculture.

SUBSTANCE: compound contains triethanolamine, water, sulfonyl urea with the following mole ratio: 0.043:1:0.05 or 0.05:0.049:1 or 0.045:2:0.05 respectively.

EFFECT: enhancement of the compound stability.

11 ex, 2 tbl

 

The invention relates to agriculture, namely, chemicals used to control weeds in cereal crops. Herbicide formulations contain derivatives, sulfonylureas.

All herbicides, including in its composition of several of the sulfonylureas, have significant advantages over others, because they have low consumption rates (8-50 g/ha under current substance) and high selectivity.

The low solubility of the sulfonylureas in water and a relatively high rate of hydrolysis of salts of these compounds is not possible to produce water-soluble drugs. So basically known herbicide formulations on the basis of the sulfonylureas are wettable powders or microspheres [1], aqueous suspensions stabilized salts of organic and inorganic acids [2], aqueous suspension, stabilized by surfactants [3].

The closest solution is herbicide composition [4], containing as active compound N-[(4-methoxy-6-methyl-1,3,5-triazine-2-yl)aminocarbonyl]-2-chlorobenzenesulfonamide and water, it also contains monoethanolamine or diethylethanolamine and triethylene glycol in the following ratio, wt.%:

N-[(4-methoxy-6-methyl-1.3.5-triazine-2-yl)aminocarbonyl]-2-chlorobenzene-self named 10-55,6;

Monoethylamine or diethylethanolamine 3.4-35,4;

Triethylene glycol 25,35-74,9;

Water the rest.

However, the drugs are given in [4] composition did not find practical application in connection with a low resistance chlorsulfuron the drug during prolonged storage.

The aim of the invention is to develop a water-soluble herbicide formulations on the basis of the sulfonylureas, which has high storage stability.

The purpose is achieved thanks to the fact that herbicide composition containing a sulfonylurea, the solvent further comprises an aqueous solution of the salt of the sulfonylurea with triethanolamine.

Example 1.

In a solution containing a 0.035 mol of triethanolamine and 1 mol of water, add 0.05 m of chlorsulfuron and at a temperature of 20-25°C. the mixture was thoroughly stirred for 2 hours. Chlorsulfuron does not dissolve completely.

Example 2.

In a solution containing 0,043 mol of triethanolamine and 1 mol of water, add 0.05 m of chlorsulfuron and at a temperature of 20-25°C. the mixture was thoroughly stirred for 2 hours to dissolve the latter. The resulting solution of chlorsulfuron have on the stability and herbicide activity (table 1 and 2).

Example 3.

The preparation is conducted as in example 2, only when the following ratios of components 0,049:1:0,05. The resulting aqueous races the thief salt chlorsulfuron have on the stability and herbicide activity (table. 1 and 2).

Example 4.

The preparation is conducted as in example 2, only when the following ratios of 0.05:1:0,05. The resulting aqueous salt solution chlorsulfuron test for stability (table 1).

Example 5.

The preparation is conducted as in example 1, only when the following ratios of 0.45:0,9:0,05. Chlorsulfuron not fully dissolved in the mixture, and the part eventually precipitates.

Example 6.

In a solution containing 0,045 mol of triethanolamine and 2 mol of water, add 0.05 m metsulfuron-methyl and at a temperature of 20-25°C. the mixture was thoroughly stirred for 2 hours to dissolve the latter. The resulting solution metsulfuron-methyl experience on the stability and herbicide activity (table 1 and 2).

Example 7.

In a solution containing 0,045 mol of triethanolamine and 2 mol of water, add 0.05 m halosulfuron-methyl and at a temperature of 20-25°C. the mixture was thoroughly stirred for 2 hours to dissolve the latter. The resulting solution halosulfuron-methyl experience on the stability and herbicide activity (table 1 and 2).

Example 8.

In a solution containing 0,045 mol of triethanolamine and 2 mol of water, add 0.05 m of azimsulfuron and at a temperature of 20-25°C. the mixture was thoroughly stirred for 2 hours to dissolve the latter. Receiving the hydrated solution of azimsulfuron have on the stability and herbicide activity (table 1 and 2).

Example 9 (prototype).

To a mixture containing 0.7 g of water and 72.5 g of triethylene glycol, at a temperature of 40°C added 6.8 g of monoethanolamine. The mixture is stirred and gradually add 20 g of chlorsulfuron, stirred for 1 hour. The resulting mixture have on the stability and herbicide activity (table 1 and 2).

Example 10.

Determination of the stability of the herbicide compositions by the method of accelerated storage.

The drug samples were analyzed on the content of the mass fractions of sulfonylureas in 100 g of the drug, placed in hermetically closed glass vials. Storage of the samples was carried out in a thermostat at a temperature of 50±1 C for 30 days. Upon expiration of the storage period, the samples were analyzed for the content of sulfonylureas by liquid chromatography.

Example 11.

Field testing of the compounds was carried out on wheat. The crops of spring wheat (Moscow 35) were mostly clogged Marya white, wild radish, amaranth, types of picolinic, field bindweed, chamomile odorless, cleaver, thistles, woodlouse and other Density clogging of a plot of 1000 sq. m was 140-160 PCs/sq.m Processing carried out at the tillering stage of wheat. Consideration of the effectiveness of the herbicide formulations was performed one month after treatment by inhibition of weight wet weight of weeds removed from 1 sq.m plot, sravnenie the control (without herbicide). A record harvest was performed by solid threshing wheat.

Table 1
Stability of compositions on the basis of sulfonylurea compounds
DrugsThe content of sulfonylureas to store, %The content of sulfonylureas after storage %% decomposition
For example 2
For example 3
42,2
41,4
42,2
41,4
0,0
0,0
In example 441,232,720,6
In example 630,830,80,0
In example 733,733,70,0
In example 833,233,20,0
Prototype (example 9)20,014,8 26

Table 2
CompositionDose g/ha A.IInhibition weight of weeds, % of the mass.Yield, kg/ha
For example 2
For example 3
6
6
93
89
25,8
24.4
In example 669024,7
The placeholder67622,2
Control (without herbicide)--19,1

Sources of information

1. Patent RU 2147179 [A01N 25/14].

2. The US patent No. 4936900 [A01N 25/14].

3. The US patent No. 5707926 [A01N 25/04].

4. Patent RU NO. 1394507[A01N 25/04].

Herbicide composition containing a sulfonylurea and water, characterized in that it further comprises triethanolamine in the following molar ratios of ingredients: triethanolamine:water:sulfonylurea = 0,043:1:of 0.05, or 0.05:0,049:1, or 0,045:2:0,05.



 

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