SU1090254A3 - Herbicidal substance - Google Patents

Abstract

PURPOSE:To provide a strong herbicide applicable to weeds of wide growing stages, and effective to weeds of growing period without damaging Japanese cypress by applying to the stalks and leaves of the weeds, containing an antibiotic SF-1293 substance as an effective component. CONSTITUTION:A herbicide containing free acid of antibiotic SF-1293 substance, its salt, pref. dimethylamine salt, choline salt, etc. as an effective component. When the heights of the weeds are less than 10 cm, it is diluted to 0.01-0.05% solution, and when the heights are between 10 and 30 cm, diluted to 0.05-0.2%, and 100 l of the solution is sprayed to 10 ares of the forest. The herbicide is effective to almost all sort of plants, and useful for the preparation of afforestation, and the weeding of cypress plantation, orchard, and pasture. It is also suitable for the pre-seeding treatment of non-plowing cultivation of crop field, because of its relatively rapid inactivation in soil. The antibiotic SF-1293 is known as an agricultural fungicide.

Description

schr

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This invention relates to chemical means of controlling undesirable vegetation, namely, the use of methylphosphonic acid derivatives as a herbicide.

A known herbicide is N-phosphonomethylglycine (glyphosate) fl.

However, its effectiveness is insufficient

The purpose of the invention is to increase the effectiveness of herbicides in a series of methylphosphonic acid derivatives.

This goal is indicated by a variation of the compound of formula O

 J: P-CHrCH2-m-CO-HH-CH-CO-MH-CH-COQH

BUT

sn

from.

tsh.

or its sodium salt as a herbicide.

The compound of formula (I) is known as an antibiotic SF-1293, exhibiting a fungicidal activity of 2J.

Sodium, its salt also exhibits a fungicidal activity. The form of use of drugs is normal.

Example 1 (Pre-emergence test). Dry soil is placed in a 10 cm diameter pot and sown with Rosicky seeds with blood to a depth of 1 cm. After carefully compacting the soil surface, it is uniformly sprayed with solutions of the SF-1293 sodium salt with substances of different concentrations in 5 ml of water. Ten days after spraying, the number of Rosicky sprout is counted and the percentage of seedling inhibition is estimated by comparing with the unprocessed vegetation vessels. For comparison, experiments have also been conducted using glyphosate instead of sodium salt SF-1293. The results are shown in tal.

Table 1

Herbicidal activity of the sodium salt of the substance SF-1293

Suppression of all soyaedov,%, with the applied amount, g / 10 a

about 100 250 500

SF-1293 substance (sodium

About 95 100 100 salt

Continued table. one

Suppression of all presumables,%, with the applied amount of g / 10 a

About I 1001250 I 500

ABOUT

ABOUT

Oh oh

Example 2 (Post-emergence testing). Dry soil is placed in a cup with a diameter of 10 cm and sown with Rosicka blood to a depth of 1 cm from the soil surface. After the shoots are raised to a height of about 10 cm, the foliage is treated uniformly with aqueous solutions of the test compounds listed in Table 2, with a spray volume of 1.2 ml (equivalent to 100 l / 10 a). Ten days after the treatment, a visual assessment of the damage caused to the plants was made on a scale of 0-10, where O corresponds to the absence of effect, and 10 indicates complete suppression.

Evaluation of damage to plants following

Damage

calla foliage,%

ABOUT

About 1 2 3 4 5 6 7 8 9 10

ten

20

thirty

40

50

60

70

80

90

100

The results of the data in example 2

summarized in table 2.

T a b l and c a, Herbicidal activity of the sodium salt of the substance SF-12.93

Failure at the test centration, thous. Share, {w; e

o That, 01 That, oh,

ten

O 1 310902 Continued table. 2 Damage at the test centering, thousand shares of the compound О | о, 01 I 0,03 fo, V

ABOUT

10 Example 3. Aqueous solutions are prepared containing the sodium salt SF-1293 substances in various concentrations listed in Table 3 and 0.1% octylphenyl polyoxyethanol. (surfactant). The treatment with these solutions is carried out at the rate of 150 l per 10 a directly on naturally growing perennial weeds, which are in the stages listed in Table 3. A visual assessment of the damage caused to plants takes place 7 and 14 days after the treatment. Herbicidal activity on 5,544 you are on a scale of 0-5, where O means no effect and 5 corresponds to complete suppression. The assessment of damage caused to plants is as follows: Month after treatment, growth suppression is evaluated, expressed using symbols from (-) to (+++), where (-) means no growth, namely, growth suppression; () - significant suppression of growth; () mean growth suppression; (+++) - no growth inhibition. The results are presented in table 3. T a b l and c a 3 th salt of the substance SF-1293

The following plants are used for testing:

PC: Р е lob 2а S tu S ch ino Ht: Helianthus tuberosus Ap: Artemisia princeps Cy ,: Cayratia Japonica Ro: BumexobtusifoSius 3c; Jmperata cyhindriea Pr: Pueraria fobata Me: Miscanthus sinensis

As follows from Table 3, the use of 150 l / to a solution of a containing substance in a concentration of 0.1–0.2% against naturally growing perennial weeds, which are found in the growth stage, makes it possible to completely destroy these weeds, regardless of their species, as well as the Herbicidal activity of the sodium salt

to achieve complete suppression of regrowth.

Example 4. The areas in which various shrubs spontaneously grow are treated with aqueous solutions containing the sodium salt of SF-1293 substances at various concentrations listed in Table 4, and 0.1% of a surfactant such as octylphenylpolyoxyethanol from calculating 150 liters per 10 a. A month later after foliar treatment, a visual assessment of the damage to the plants is carried out, using a scale with values from 0 to 5.0, which means no effect, 5 corresponds to total destruction, as described in Example 3. The results are summarized in Table 4. Table of substances SF-1293

nat0, 2

5 5 0.3

Tests were carried out with the following plants:

Sc: china

Ct: Castanea crenata

RB: Rubus patmatus

Zp: Zanthoxy.Cumpiperipum

Pa: Pteridiumaguifinum

 Viburnum difatatum

Table 4 shows that the substance SF-1293 also has a high herbicidal activity against wood5

5. 5

5 5

5 5

5 5

five

irrespective of their type. Example 5. Treating woody plants with a height of about 60-70 cm with aqueous solutions containing, in different cases, listed in Table 5, sodium

salt of SF-1293 substance and 0.1% octylphenylpolyoxyethanol as a surfactant, moreover, for the treatment take aqueous solutions at a rate of 150 l per 10 a. After 7 and 14 days after treatment, the damage caused to the plants by the herbicide treatment is visually evaluated using

Results of herbicidal treatment

Concentration,%

Test compounds SF-1293 (Na salt) Glyphosate (isopropshthamine will) Unprocessed The above designations correspond to the following names for test plants; Pd: Piceadens if Vaga La: Larix leptolep is Ch; Chamaecyparis obtusa Cp; Cryptomeria aponica Ct; Castanea crenata As follows from Table 5, SF-1293 is not phytotoxic against Chamaecyparis obtusa, even when treated with a solution of 0.5% concentration of SF-1293 at a rate of 150 liters per 10 a and, therefore, can be used for selective destruction of weeds and shrubs in forested areas occupied by useful plants. Example 6. A preparation is prepared in the form of aqueous solutions containing soybean as an active ingredient.

Table 5

Damage through

7 days

. 14 days

Pd La Tch I Cp Ct Pd j La | Ch Г CpT Ct 3, 4 4 0 1 2 About such an assessment is the same scale (from OO 5) as used in example 4. The results are summarized in Table. 5, 4.5005550 О 5 4.5 О 0.55 5 5.0 15 4.5 О 0.55 5 5 О 2 5 100222 1 1 3 1012333.3 4 21 23 4 4 45 5 ОО ОО 0.0000 SF-1293 concentration 0 , 05 or 0.1%; and, in addition, 0.1% octylphenoxypolyoxyethanol as a surfactant. The prepared solutions are used by the Rushech obtusifotius at a certain stage of development, planted in small bottles with a diameter of 20 cm, in an amount of 100 liters per 10 a. Results. Estimated visually in points from 0 to 5 after 21 days after treatment. In this case, O means no effect, and 5 means plant death (see Example 4). After 4 carried after processing dapayut re-assessment. Damage caused to plants, as well as the growth of new shoots from the rhizome, which is expressed in symbols from (-) to (+++), where (-) means complete suppression of regrowth, and (+++) is the maximum regrowth ( see example 4). The results are shown in table 6.

Claims (1)

The use of the compounds of formula 0 H ₃ S.N. R-SKL-SNh-SI-SO -INSYA-SO-IN-ST-SOSYa i ₂ ® s _{3 and 3} or its sodium salt as a herbicide. PZ 1090254