KR830002859B1 - Herbicide composition - Google Patents

Abstract

No content.

Description

Herbicide composition

The present invention relates to herbicide compositions having an excellent effect on killing annual monocot weeds and dicots weeds present in crops (especially rice).

The present invention relates to a herbicide composition comprising (A) a compound of formula (I) as a active ingredient in combination with a compound of formula (B).

In the above general formula

R is methyl or ethyl

R 1 is straight or branched alkyl having 1 to 5 carbon atoms.

Compounds of general formula (I) are described in JP 2,604,224 and compounds of general formula (II) are DE-AS 1,011,904 and JP 1,770,34 and the "Pesticide Manual". J., pages 197 and 472 (H. Martin and CR Worthing).

Compound (A) is known to be effective in killing algae and annual weeds produced in rice, while compound (B) is effective in killing annual dicotyledonous weeds.

Weeds as listed below are those that can be killed with the compositions of the present invention.

a) Gramineae: blood

b) Cyperaceae: Alpine garden, truebang garden, wind sky, tadpole

c) Pontederiaceae: water ants

d) Lythraceae: node flower

e) Sorophulariceae: Ammania Coccinea, dorsal grass

f) Elatinaceae: by water

g) Onnagraceae

h) Hypericaceae: Baby pepper sprouts

The ratio of composition (A) to (B) can be varied widely. These ranges are from 1: 0.2 to 1: 5, preferably 1: 0.3 to 1: 2.

The formulations according to the invention can be used as preparations which have been previously prepared such that each active ingredient can be directly mixed or used in a tank prior to use. Formulations prepared in advance for use include hydrating ingredients, emulsion concentrates, powders or granules, and these preparations contain conventional formulation auxiliaries such as hydrating agents, tackifiers, dispersants, solid or liquid inerts, grinding aids and solvents, and the like. Doing.

Hydrating powders are those which are homogeneously dispersed in water, which, in addition to the active compounds, diluents or inerts, may contain hydrating agents (eg polyoxyethylated alkylphenols, polyoxyethylated oleyl amines or stearyl amines, alkylsulfonates). Or alkalphenyl sulfonates), dispersants (e.g. sodium lignin sulfonate, sodium 2, 2'-dinaphthylmethane 6,6'-disulfonate, sodium dibutyl naphthalene sulfonate or oleyl-methyl taurine Sodium salt), and the like.

Emulsion concentrates dissolve the active compounds in organic solvents (e.g. butanol, cyclohexanone, dimethylformamide, xylene, isophorone) or in higher boiling aromatic compounds and nonionic hydrating agents (e.g. poly Oxetylated alkyl phenol or polyoxytylated oleyl or stearyl amine).

Powders are obtained by grinding the active compound with finely dispersed solids (eg natural clays such as talc, kaolin, bentonite, pyrophyllite or diatomaceous earth).

Granules can be prepared by spraying the active compound onto an adsorbent, granular inert material or by using the active compound concentrate for adhesion (eg polyvinyl alcohol, sodium polyacrylate or mineral oil) or by a carrier (eg sand, kaori). Nitrate or granular inert material). Suitable formulations may be prepared by conventional methods of preparing fertilizer granules, and may be mixed with fertilizers as necessary.

The concentration of the active compound (in the case of commercially available formulations) in the herbicide composition can be changed. In the water-soluble powder, the total concentration of the active compound (A + B) may be varied, for example, between about 10 and 80%, with the remainder containing one or more of the formulation additives described above. In the case of emulsion concentrates, the concentration of active compound is about 10-70%. Typically the powder contains about 5-20% of the active compound and the spray solution contains about 2-20%. In the case of granules, the content of the active compound is determined depending on whether the active compound is a liquid or a solid, and which granule aids, fillers and the like are used.

If necessary or desired, the concentrate may be diluted before using the concentrate in a conventional manner and the water soluble powder and emulsified concentrate are diluted as water.

Powders, granules and spray solutions are no longer diluted and used as is. The desired amount of active compound depends on external conditions (eg temperature, humidity and the like) to achieve the desired result. The active compound is used at 0.1 to 10.0 kg / ha or more, preferably 0.3 to 5 kg / ha.

The following examples illustrate the invention.

EXAMPLE

The mixture was prepared as follows. : Alkali metal of alkyl naphthalene sulfonic acid 5.0 parts

Active compound A ₁ (R = CH ₂ ) 1.5 parts Sugar (eg sugar cane or maltose) 10 parts

Active Compound B ₁ (R = C ₂ H ₅ ) 1.5 parts Cellulose Waste 20.0 parts

Sodium bicarbonate 5.0 parts Inert material (silicic acid or chalk) 47.0 parts

Mix each ingredient thoroughly and grind with a cross beater mill. The mixture is then sprayed in a fluid bed drier with 6.25% aqueous methyl-hydroxyethyl cellulose solution until the desired size granules and firmness are obtained. About 10 parts of dry methyl-hydroxy-ethyl cellulose are required.

The granular material is dried in a fluid bed granulator and passed through a sieve to form particles of 0.3 to 1 mm in diameter.

Example 2

Prepare a solution of the active ingredient and add emulsifier to it.

Its components are as follows:

Active ingredient A ₁ 1.5 parts Triisobutyl phenol polyglycol ether (20EO) 2.6 parts

Active ingredient B ₁ 1.5 parts Aromatic solvent (eg methylnaphthalene) 29.0 parts

Calciumphenyl sulfonate 1.4 parts

The obtained solution or dispersion is applied as uniformly as possible using 62.5 parts of etherpoljite as a carrier. The mixture is then dried with 1.5 parts of kieselguhr. Granules of grain size of 0.4 to 1 mm are obtained.

[Examples 3 to 6]

The effect of the compositions in the following examples was determined by experiments and the experiments were compared by calculating the effect of a single component. This effect is calculated by the S.R. Calculated according to Corby's equation. (Weeds 15, pages 20-22 (1967))

The equation is

In the above formula

X represents% damage by herbicide A at a concentration of x kg per hectare

Y represents% damage by herbicide B at a concentration of y kg per hectare

E represents the% damage that can be expected by the combination of herbicide A + B at a concentration of x + ykg per hectare.

The compounding effect is greater than the additive effect when the actual damage is greater than that of the calculated value. That is a synergistic effect.

This synergistic effect is illustrated in the table below, and the calculations are listed in parentheses next to the measured values in the chart.

The following abbreviations are used to shorten individual weeds.

CYPDI-Alpine Realty LINPR-Pink

CYPIR-Charm Garden MOOVA-Seal

ECHCR-P. ROTIN-Node

ELATR-Water Star SCPSU-Tadpoles

The rice field was uniformly transplanted into 1 to 4 square meters of land section to carry out field experiments to obtain the results indicated below. A few days after transplanting rice, the composition was used as granules and the results were visually observed. In the tests of all the compositions according to the invention it was found that a marked synergistic effect was shown for the weeds indicated above.

Example 3

Test on transplanted rice (Philippines):% damage due to drug treatment 6 days after transplant

Rate it 16 days thereafter

Example 4

Test on transplanted rice (Japan):% damage due to drug treatment 8 days after transplant

Rate it 40 days later

Example 5

Twice test in transplanted rice (Japan):% damage due to drug treatment 8 days after transplantation

* Number of tests

Example 6

Test on transplanted rice (Japan):% damage due to drug treatment 8 days after transplant

Rate it the next 32 days

Claims (1)

A herbicide composition containing a compound of the general formula (I) and the compound of the general formula (II) in an amount of 1: 0.3 to 1: 2 as an active ingredient.

In the above general formula, R is methyl or ethyl and R ₁ is straight or branched alkyl having 1 to 5 carbon atoms.