KR830001609B1 - Herbicide Composition - Google Patents

Abstract

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Description

Herbicide Composition

1 is a graph in which the straight line L is the standard line, the portion below the straight line L (the origin side) is synergistic, and the portion above the straight line L is the opposite effect.

2 is a graph showing isoballs and standard lines showing a herbicidal effect of 90% based on the data shown in Table 4.

FIG. 3 is a graph showing isobols and standard lines showing herbicidal effects of 90% based on data in Table 5.

The present invention relates to a herbicidal herbicide composition. More specifically, the present invention has a wider range of use organs than a conventional herbicide herbicide, and can be used at any time from germination to growth of faucet weeds to control perennial weeds that are difficult to control with conventional herbicides. The present invention relates to an excellent herbicide composition.

By time of use, power herbicides are classified into pre-germination herbicides, post-germination herbicides, and herbicides used late after germination, with most of the herbicides currently in use in the first two forms.

Representative examples of herbicides before germination are 2,4,6-trichlorophenyl-4-nitrophenylether (eg trade name “MO”) and 2,4-dichlorophenyl-4-nitrophenylether (eg trade name “NIP”) Can be mentioned. Representative herbicides after germination are mixtures of methyl-N- (3,4-dichlorophenyl) carbamate and ethyl 2-methyl-4-chlorophenoxyacetate (e.g. trade names "Swep M" and S- (4- Chlorobenzyl) -N, N-diethylthiolcarbamate and a mixture of 2-methylthio-4,6-bisethylamino-S-triazine (eg, "Saturn S").

Herbicides before germination are extremely effective when used before or immediately after weeding, but their effectiveness is significantly reduced when used in the stage where weeds are actively growing. After germination, herbicides are effective for the user until weeds germinate and grow. However, after germination, the herbicides are highly phytotoxic to rice, so the use of these herbicides is limited to the stage where rice is grown significantly. In addition, these herbicides often have the drawback of causing phytotoxicity or decreasing their effectiveness depending on temperature or sun condition. Another drawback of this herbicide is that this herbicide does not show a sufficient effect on perennial weeds, but rather has the disadvantage that promotes the prevalence of such weeds.

Due to the recent need for labor savings in the agricultural sector, the emergence of herbicides having a wide use period and capable of controlling all types of weeds in a single treatment without causing phytotoxicity has been required. None of the currently available herbicides meet this requirement.

It is an object of the present invention to provide a herbicide which exhibits a high herbicidal effect on the growth of weeds without causing phytotoxicity to rice when it is suitable from germination, for example, immediately after transplantation.

The inventors of the present invention disclose an α- (β-naphthoxy) propionic acid derivative of general formula (I) disclosed in Japanese Patent Application Publication No. 46-14077 (1971.4.15).

이고, X는 수소 또는 할로겐 원자임)Wherein R is -OCH ₃ or

X is hydrogen or a halogen atom)

And 2-chloro-2'.6'-diethyl-N- (alkoxyethyl) acetanilide of general formula (II) disclosed in Japanese Patent Application Laid-open No. 49-54524 (May 27, 1974).

(Wherein R ₁ represents a lower alkyl group) exhibits an unexpectedly high herbicidal effect, and has recently been known to have a snare, tadpoles, Alisma canaliculatum, peel grass and beech. And when used in perennial weeds as well as annual weeds such as woolen and the like, where each compound exhibits no control effect, found that this mixture has no toxicity to rice.

The dosages of the compounds of the general formulas (I) and (II) as active ingredients of the herbicides of the present invention can be significantly reduced than those of these compounds alone. In the herbicide of the present invention, the mixing ratio of the two compounds is 0.15 to 3 parts by weight, suitably 0.2 to 0.5 parts by weight, more preferably 0.2 to 0.3 parts by weight of the general formula (II) compound to the general formula (I) compound. It is wealth. Specific examples of the compounds of the general formulas (I) and (II) are shown in the following table.

[Compound of General Formula (I)]

[Compound of General Formula (II)]

The composition of the present invention is extremely effective when used in the form of granules. More suitably, the granules are for example mixed with the active ingredient of formula (I) and (II) with bentonite, clay, talc or limestone and a binder such as sodium lignin sulfonate, polyvinyl alcohol or sodium alkylbenzenesulfonate The mixture is prepared by kneading with water, extruding the mixture into granules and then drying or homogeneously adsorbing to a carrier such as vermiculite. Granules can be sprayed by hand or by sprayer on land or by helicopter

The present invention will be specifically described below by way of non-limiting examples and test examples. Compounds A-F correspond to those shown in the above table, and parts shown in the examples are parts by weight.

Example 1

Granules

10 parts of compound A, 5 parts of compound, 60 parts of bentonite, 21 parts of talc, 1 part of dodecylbenzenesulfonate nantium, 1 part of polyoxyethylene alkylaryl ether, and 2 parts of sodium lignin sulfonate were mixed, followed by kneading with an appropriate amount of water. This mixture was granulated by a conventional method using a granulator to present 100 parts of granules.

Example 2

Granules

Compound B7 part, compound D7 part, bentonite 63 part, talc 30 part, naphthalenesulfonic acid mixture 2 parts and dioctylsulfosuccinate 1 part were mixed, and then kneaded with an appropriate amount of water. This mixture was granulated by the conventional method using the granulator, and 100 parts of granules were prepared.

Example 3

Granules

Compound C8 part, bentonite 32 parts, talc 52 parts, sodium lignin sulfonate 2 parts and sodium dodecylbenzene sulfonate 1 part were mixed, and then kneaded with an appropriate amount of water. This mixture was granulated in a conventional manner using a granulator and then dried. This granule was infiltrated with 5 parts of compound F, and 100 parts of granules were prepared.

Example 4

Granules

Compound B7 part, compound E4 part, bentonite 60 parts, clay 26 parts, 2.5 parts of alkylbenzenesulfonate sodium and 0.5 parts of polyvinyl alcohol were uniformly ground mixed, and then kneaded with an appropriate amount of water. This mixture was granulated by the conventional method using the granulator, and 100 parts of granules were prepared.

Example 5

Powder

Compound B9 part, compound F4 part 87 parts of a mixture of diatomaceous earth and clay were ground and mixed to prepare 100 parts of powder.

Example 6

Hydrating agent

A hydrating agent was prepared by grinding and mixing Compound A30 part, Compound D15 part, white carbon 10 parts, diatomaceous earth 40 parts, sodium lignin sulfonate 3 parts and sodium dodecylbenzene sulfonate. The effect of this invention is demonstrated concretely by the following test example.

[Test Example 1]

Herbicide effect when used before fermentation

The paddy soil (11 kg) was filled in a Wagner complex (1 / 2,000ares), and 1 g of N ₂ P ₂ O ₅ and K ₂ O were used for the entire soil layer in the form of a compound fertilizer. An appropriate amount of water was added thereto, and the soil was sufficiently stirred. The soil was then kept under impregnation conditions. Two bunches of rice seedlings (2.5-leaf stages) were grown in advance in the greenhouse, and two rice seedlings of each herd were planted 3 cm deep beneath the soil of the cornflower. Seeds of rice and blood (Echinochloa orgzicola), eggplants, weeds, tadpoles, and tadpoles and Alisma canaliculatum, 2 year old shoots of snare tubers, beetles, tadpoles and cattle bones Transplanted into soil. The plant was grown in a greenhouse and watered to a depth of 3 cm, while leaking to a depth of 1 cm each day.

Three days after weeding started germination and seedlings were transplanted, a predetermined amount of test compound formulated in the manner described in Example was used in each jar.

One month after granule use, the amount of residual weeds and the degree of injury to rice were examined. The results are shown in Table 1.

TABLE 1

[Test Example 2]

Herbicide effect when using after germination

Fill an appropriate amount of paddy soil with annual and perennial weeds of rice in each concrete complex with a size of 50cm × 50cm × 50cm, and fill N, P ₂ O ₅ and K ₂ O in the form of chemical fertilizer. The soil was kept in an impregnation state. Four bunches of 2.5-leaf rice seedlings were transplanted into each pot at equal intervals, two in each herd. After 17 days of implantation, granules containing the required amount of test compound prepared by the method described in Example were used in the impregnated soil.

One month after using the granules, the amount of residual weeds and the degree of injury to rice were examined and the results are shown in Table 2. During this period, the depth of water was maintained at 3 cm, leaking at a rate of 1 cm daily.

TABLE 2

[Test Example 3]

Faucet Test

Faucets with naturally occurring weeds were moderately cultivated and fertilized by conventional methods (1 kg each for N, P ₂ O ₅ and K ₂ O). These were then divided into a zone of 10 m 2 (2.5 m 2 × 4 m). Two 2.5-leaf rice seedlings were transplanted into each zone at intervals of 15 × 30 cm, two per each herd. After transplanting, the water was kept at a depth of 3 to 5 cm, and after weeding the granules containing the required amount of the test compound prepared by the method described in the Examples (3 days after transplanting), and the rice skin was 3.0 to 3.5 leaves. At the stage, each pot was sprayed by hand. 1 use

TABLE 3

In general, when two herbicides are used, the synergism of the two herbicides is measured by the isobole method. In other words, the method is to determine whether the effect of the mixture of the two herbicides is greater than, less than or equal to the total effect of each herbicide. [See Isoball Method for Evaluating Interactions in Herbicide Mixtures of Hideo Senjaka, WithScience, 15, 16-20 (1973)]

When the effect of the mixture of herbicide M and herbicide N is equal to the sum of the effects of herbicides M and N, the following equation is established.

Where m is the dosage of herbicide M necessary to achieve herbicide effect of P%, n is the dosage of herbicide N necessary to achieve herbicide effect of P%, and X _M and X _N are herbicides M and N as a mixture Dosages of herbicides N and M, if used, to obtain a herbicidal effect of P%.

In measuring the synergistic effect of two herbicides, these mixtures which changed the mixing ratio were produced, and these percent blocking rates were measured. From the obtained data, the percentage of percentage cut, i.e., a mixing ratio representing 90%, was taken and started on the graph. Connected the starting points and drawn a curve for isoballs. Separately, each of the two herbicides alone was used to draw a standard line on the graph based on the dosage required to achieve 90% inhibition. If isoballs are below the standard line, the use of a mixture of two herbicides is believed to have a synergistic effect.

The addition test example which measured the synergistic effect of the herbicide of this invention by the isoball method is shown below.

[Test Example 4]

Test for synergistic effects on weeds at an early stage of growth

1 kg of paddy soil was filled in a pot (1 / 10,000a), and N, P ₂ O ₅ and K ₂ O were used in the form of a compound fertilizer for the whole soil, 0.3 g each. Forced germination of seeded rice seedlings and tubers of snares were dispersed in each pot and covered with soil. An appropriate amount of water was slowly watered to keep the soil in each pot in an impregnated state. When the test weed reached the two-leaf stage, a small amount of a compound prepared in the same manner as described in Example 6 above and a wetting agent containing F was used on the water surface.

After 20 days, the snares of rice husks were removed, dried in air and weighed. Percent growth inhibition rate was calculated. The results are shown in Tables 4 and 5.

TABLE 4

Percent growth inhibition rate of rice hulls using a mixture of compounds B and F (%)

TABLE 5

Percent percent growth support of Olme by using a mixture of compounds B and F

As shown in FIG. 2, the isoball L ' ₂ for 90% inhibition of the growth of rice hulls lies below the baseline L ₂ . In Figure 2 it can also be seen that L ' ₃ for 90% inhibition of Olme's growth lies below the baseline L ₃ .

From this fact it is clear that the use of mixtures of compounds B and F shows a synergistic effect.

Likewise, when the compounds of the general formulas (I) and (II) are mixed, it is evident that the synergistic control effect is also exhibited.

The above results indicate that even if the composition of the present invention is used only once from the onset of the emergence of weeds immediately after the transplant of rice to the stage where weeds are actively growing, weeds can be eliminated without causing plant toxicity to rice. Prove better than herbicides.

The growth of weeds is different even if the timing of transplanting rice is 3-4 days faster or slower than timely, so the use of herbicides should be adjusted to be not the same as the use of fungicides or insecticides. Thus, it is not possible to mechanically spray herbicides over a wide area, which does not save labor on farming. However, since the herbicide of the present invention has a light phase usage time, the herbicide can be used 10 to 20 days before or late to transplant rice. Thus, this herbicide can be sprayed on the light receiving faucet at the same time, which can greatly save labor.

Claims (1)

1 part by weight of α- (β-naphthoxy) propionic acid derivative of formula (I) and 2-chloro-2'6'-diethyl-N- (alkoxyethyl) acetanilide of formula (II) A herbicidal composition for water-containing, containing part as an active ingredient.

Wherein R is -OCH ₃ or

And X is hydrogen or a halogen atom, and R ₁ is a lower alkyl group.

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