JPS61289004A - Weeding agent composition - Google Patents

Abstract

PURPOSE:A weeding agent composition, containing a weeding compound substance SF-1293, sulfate based or sulfonate based anionic surfactant, etc. and a polyoxyalkylene based nonionic surfactant in a specific proportion and having enhanced effect. CONSTITUTION:A weeding agent composition containing (A) a weeding substance SF-1293 or a salt thereof, (B) a sulfate based or sulfonate based or carboxylyc acid based anionic surfactant and (C) a polypoxyalkylene based nonionic surfactant at 1:0.5-20 weight ratio of the components (A) to (B) and 1:0.1-20 weight ratio of the components (A) to (C). The above-mentioned composition is capable of enhancing the weeding effect of the component (A), and can be prepared in the form of a water-soluble solid formulation, etc., which cannot be conventionally prepared. The solid component (A) has an advantage in that it has more improved stability with time than that of the liquid formulation.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a herbicidal composition in which the herbicidal effect of the herbicidal compound SF-1293 substance is enhanced.

More particularly, the herbicidal SF-1293 substance represented by the following formula [1]
The present invention relates to a herbicide composition that significantly increases the herbicidal efficacy of (No. 23282) or a salt thereof.

(Prior art and problems to be solved) SF-1293 substance of formula (I) and its salts (
For example, alkali metal salts, alkaline earth metal salts, ammonium salts, organic amine salts, etc.) are known to have an extremely strong herbicidal power against annual and perennial weeds (Japanese Patent Publication No. 1983- No. 23282 and U.S. Patent No. 4
．． 309.208).

Therefore, for example, the SF-1293 substance or its salt may be used in a residence, a tennis court, a volleyball court, a soccer field, a factory site, a railway track, a forest or a forest, an agricultural land, an orchard, etc.
It can be widely used as a herbicide.

However, when the compound of formula CI) or its salt is used alone, the adhesion, wet spreadability, or fixation properties to the leaves of various weeds are insufficient, or the compound may fall off or be washed away by wind and rain, etc. In many cases, the SF-1293 substance cannot exhibit its inherent strong herbicidal power, so it has been necessary to apply the chemical in large amounts.

When using herbicides, it is common to add a surfactant. However, there are cases where the effect of the herbicide does not change at all even if a surfactant is added, cases where the effect of the herbicide is deteriorated due to the addition of a surfactant, and cases where the surfactant promotes the decomposition of the herbicide component. It is being Therefore, it is conventional wisdom that a favorable increase in herbicidal efficacy can only be obtained by appropriately selecting a combination of a specific herbicidal compound component, surfactant, and target plant. “Chemical regulation of plants” such as cedar wood, etc.
Volume 19, Mu 1.34-49 (1984) and J.B.
WYRILL, O, C, BURNSIDE rWEE
DSCIENCE J Volume 25, 3rd edition, (+977
)].

Therefore, from the standpoint that herbicidal compound components should be used effectively, when using herbicides, it is necessary to simply add surfactants haphazardly without finding the preferred combination of ingredients as described above. It is desirable to avoid adding additives.0 Understanding this technical background, when providing a new herbicide for practical use, it is important to select appropriate herbicides to effectively achieve the purpose of weed control. Finding combination formulations is an extremely important challenge.

Therefore, the present inventors decided to combine a quaternary ammonium salt and a nonionic surfactant with the SF-1293 compound of formula [I] or its salt. -1293 substance preparations have already been discovered and proposed (Japanese Patent Application Laid-Open No. 60-4112).

However, in producing the above solution-type preparation, it is necessary to incorporate a large amount of the compound of formula CII or its salt, and it is not always possible to achieve satisfactory herbicidal effects. There was a need to find improved herbicidal compositions that were more potent and efficient. Also, the above-mentioned Unexamined Patent Publication No. 1986-
Since the composition according to the invention of No. 4112 can only be produced in the form of a bath liquid preparation, it is separately possible to take advantage of the characteristics of the compound of formula CI) or its salt, and to use it conveniently and prevent the risk of accidental ingestion. There has been a strong need for compositions of SF-1793 material that have the property of being manufactured in the form of water-soluble solid formulations, such as water-soluble formulations.

(Means for Solving the Problems) Therefore, the present inventors developed 8F-1293, which has a strong herbicidal effect even if the compounding ratio and practical application amount of the herbaceous compound, which is the compound of formula CI or its salt, is reduced. in order to obtain a herbicidal composition containing the substance, a compound of formula CI) or a salt thereof;
In order to specifically find out the appropriate combination with various surfactants and/or other wide range of adjuvants, as well as the appropriate blending ratio, and to give properties that can be prepared in the form of water-soluble solid preparations such as water-based solvents. We conducted intensive research with the aim of

As a result, within a selected blending ratio of specific sulfate-based, sulfonate-based, phosphate-based, and carboxylic acid-based anionic surfactants described below, whether used alone or in combination, formula CI) Compound or its salt (
Hereinafter, we have discovered that when used in combination with (sometimes referred to as ~ingredients), the absorption and transfer of the latter herbicidal compound into the plant body can be significantly increased, and therefore, the herbicidal effect can also be enhanced.9. Therefore, the present invention is based on the new discovery of the properties of the compound of the formula (Il) and its salts, which have never occurred to anyone else.

Furthermore, the present inventors have discovered that one or more of the above-mentioned specific sulfate-based, sulfonate-based, phosphate-based, and carboxylic acid-based anionic surfactants [hereinafter simply referred to as (b
) component] and one or more polyoxyalkylene nonionic surfactants [hereinafter referred to as
(c) a selected component consisting of
The herbicidal effect was significantly increased by incorporating the compound of formula (11) or its salt in a specific proportion.
It has been found that a composition containing F-1293 substance can be created.

In addition, depending on the specific combination of these two components (a) and (b), or the three components (a), (b), and (c), another problem may arise. The present invention was successfully completed based on these findings.

Therefore, the gist of the first invention is (a)
SF-1293 substance or its salt and (b) one or more sulfate-based, sulfonate-based, phosphate-based or carboxylic acid-based anionic surfactants (~
:(b) in a ratio (weight ratio) of l:o, in the range of 5 to 1:20.

Moreover, the gist of the second invention is (~SF
-1293 substance or its salt, (b) sulfate type,
one or more sulfonate-based, phosphate-based, or carboxylic acid-based anionic surfactants; and (e) one or two polyoxyalkylene-based nonionic surfactants.
The ratio (weight ratio) of (a3:(b)) is l
: 0.5 to 1:20, and (a) : (a herbicide composition characterized by containing the ratio (weight ratio) of l:o, 1 to 1:20. It is in.

Examples of the anionic surfactant (component i) used in the present invention include the following.

(1) Sulfate surfactant Alkyl C carbon'llB~22) Sulfate.

Polyoxyalkylene alkyl (8 to 22 carbon atoms) ether sulfate.

Polyoxyalkylene alkyl (4 to 11 carbon atoms) aryl ether sulfate.

Ho IJ oxyalkylene styrenated phenol ether sulfate.

(10 Sulfonate surfactants Alkyl (carbon & 4-16) benzene sulfonates.

Dialkyl sulfosuccinate 0 Alkyl (4 to +6 carbon atoms) diphenyl ether sulfonate.

α-olefin (8 to 22 carbon atoms) sulfonate 0 (1111 phosphate surfactant [rlJ alkyl (aε to 22 carbon atoms) phosphate;

Polyoxyalkylene alkyl (8 to 22 carbon atoms) phosphate.

Polyoxyalkylene alkyl (carbon a 4-16) phenyl ether phosphate.

qV) Carboxylic surfactant Potassium oleate Potassium semi-hardened beef tallow fatty acid Sodium stearate Sodium mixed fatty acids Among the above, alkyl sulfates, polyoxyalkylene alkyl sulfates, alkyl phosphates, and polyoxyethylene alkyl phosphates are preferable.

These surfactants may be used alone or in combination of two or more.

In the composition according to the first or second invention, the blending ratio of the anionic surfactant (b) to the compound of formula (I) or its salt (a) is such that a) = (b). 1=0 in weight ratio
．． range of 5 to 1:20, preferably I:0.5 to 1:1
It is in the range of 0.

In the second composition of the present invention, in addition to the compound of the formula (R) or a salt thereof (Xu) and an anionic surfactant (b), one type of polyoxyalkylene nonionic surfactant or When two or more types (c) are blended, the above-mentioned excellent effects can be obtained.

Examples of the polyoxyalkylene nonionic surfactant as component (c) in the composition of the second invention include the following.

Polyoxyalkylene alkyl (carbon number ε~22) ether.

Polyoxyalkylene alkyl (4 to 16 carbon atoms) aryl ether.

Polyoxyalkylene aryl ether.

Polyoxyalkylene alkyl (carbon fH number 8-22) ester.

Polyoxyalkylene alkyl ('C8-22) lupitan ester.

Polyoxyalkylene alkyl (8222 carbon atoms) sorbitol ester.

Polyoxyalkylene alkyl (8 to 22 carbon atoms) glycerol ester.

Polyoxyalkylene chloride polymer.

Polyoxyalkylene block polymer alkylglycerol ester 〇 The composition of the polyoxyalkylene nonionic surfactant (e) is the compound of formula (I) or its salt (a per ml): (c) The weight ratio of l:o is in the range of 1 to 1:20, preferably l:0.5 to 1:10.

Furthermore, in the second composition of the present invention, the ratio of (b) anionic surfactant to (c) polyoxyalkylene nonionic surfactant is (b) two (c)! Quantity ratio: 1:4~
l:o, preferably in the range of 25, more preferably 1:3
~l:0.33.

The herbicide composition of the present invention can be prepared not only in the form of a liquid preparation, but also as a water-soluble solid preparation such as a powder, a granule, or a suspension or a wettable powder. good.

In the case of an aqueous solvent, water-soluble inorganic substances such as salts such as mirabilite, ammonium sulfate, and common salt, and water-soluble organic substances such as sugars and urea can be added as fillers.

In addition, any conventional additive components can be added in consideration of formulation design within a range that does not impair the effects of the present invention.

(Effect of the invention) As described above, the herbicide composition of the present invention has the formula (1
) or its salt (a) as described in the following Examples and Test Examples, and also enables production in the form of water-soluble solid preparations such as aqueous solutions, which could not be prepared in the past. There are advantages that make it possible.

Moreover, in the composition of the present invention prepared as such a water-soluble solid preparation, the stability over time of the compound of formula (I) or its salt is greatly improved compared to the case of a liquid preparation. It was also found that it has the following advantages.

Furthermore, the composition of the present invention also has the advantage of improved rain resistance, which prevents the risk of runoff and decreased herbicidal efficacy due to rainfall after foliage application.

The herbicide composition of the present invention is effective for weeding not only annual weeds, but also perennial weeds such as grasshopper, cyperus, and cyperus.

The usefulness of the composition of the present invention will be explained below using Test Examples and Examples.

Test Example 1 The sodium salt of SF-1293 substance, which is a test substance for absorption into plants, and the surfactant shown in Table 1 were mixed at 100 μt/− or +50 μt/− or +50 μt/−, respectively.
An aqueous solution containing .mu.f/- was prepared as a test chemical solution. The test plants were No. 1, three seedlings each grown in No. 3 clay pots.
Cucumber seedlings (variety: Tokiwa Jiho) in the early stages of true leaf development were used.

The test was conducted as follows. That is, the test chemical solution was applied dropwise onto one of the cotyledons of the test plant using a micropipette in an amount of 50μ per leaf. After 4 days, the remaining cotyledons and true leaves to which no chemical solution was applied were collected, cut into pieces, and extracted with 80 timethanol under heating to obtain samples for analysis.
s) By bioassay using ATCC6633 as the test fungus, SF-12 was applied to plant parts to which no sample was administered.
93 substance Na Absorbed and transferred amount as salt (8F-1293 substance Na in dried juwashi of sample plant used as analysis sample)
The number of test plants for which salt fi) was quantified was 3 per treatment area.
The O absorption transfer rate (a) using 0 pipes is SF -129
3 substances) +7 Calculated as a percentage using the following formula, using the test using only an aqueous um salt solution as a control.

The results obtained are shown in Table 1.0 As is clear from the results in Table 1, the anionic surfactant used was S
Plant absorption and transfer of substance F-1293 or its salt was significantly promoted compared to the control test. Even when compared with comparative examples,
It is clear that it is significantly superior. Note that when only the anionic surfactant was applied, no phytotoxic effects on the test plants were observed.

A mixture was prepared by uniformly mixing each component shown in Table 2 below in an amount that would give the formulation (by weight) shown in Table 2. When water was used as a carrier, the admixture resulted in a composition in the form of a Schifron-like solution. On the other hand, when a substance other than water (such as mirabilite, ammonium sulfate, lactose, etc.) is used as a carrier, the above-mentioned homogeneous mixture or the conventional dry granulation method may be used to granulate the material. It was made into a composition.

The resulting composition, whether initially in solution or granule form, becomes a homogeneous aqueous solution when diluted with water, making it suitable for spray application.

Test Example 2 Evaluation of herbicidal activity
iarig (RETZ, ) KOELER) To broadleaf miscellaneous J4O x Tough' herbicidal activity was evaluated. Each weed was grown in a greenhouse, and the crabgrass was used at the 5-leaf stage and a plant height of 20 cm, and the Japanese knotweed was used at the 6- to 7-leaf stage and a plant height of 15 cm.

The spraying solution was 3.0, 4.0 and 5.0k per hectare of the prescribed formulation shown in Examples f1i 1-66 above.
An amount equivalent to 51 kt per hectare was diluted with water equivalent to 51 kt per hectare, and the solution was sprayed over the entire stems and leaves of weeds.

The results were obtained by measuring the fresh weight of remaining grass on the 14th day after application of the chemical, and expressed as a herbicide rate (a) relative to the untreated area. The test was n=5.
The test results are shown in Table 3 as average values.

Table 3 4 Comparative formulations used in reference examples are as follows 0 Reference example l 5F-1293 substance sodium salt: 20 pieces
: 80% Reference Example 2 SF-1293 substance sodium salt: 30% dodecyltrimethylammonium chloride = 5-polyoxyethylene CP = 15) Oleylamine: 5% phosphoryoxyethylene (P-13) nonylphenyl ether = 5% water
:55 Reference Example 3 SF-1293 Substance Sodium Salt = 30% Dodecyltrimethylammonium chloride = 5 Polyoxyethylene (P = 15) Oleylamine: 5 Polyoxyethylene (P = 15) Glycerin f oil fatty acid ester
=5 water
:55% In Table 2, in the Examples, the formulations containing 2096 sodium salts of the SF-1293 substance are both Reference Example 2 and Obi 3 (each containing 30 grams of the sodium salt of the SF-1293 substance). The activity was the same or higher, and the medicinal efficacy per active ingredient was significantly enhanced.

Reference Examples 2 and 3 are the formulations shown in JP-A No. 60-4112.Test Example 3: Rain Resistance Test A spray solution prepared by diluting the composition of the above example with water was sprayed on the Japanese grasshopper. , Artificial rain (20 M/hour) was applied for 1 hour 2 or 6 hours after spraying. On the 14th day after application of the chemical, the fresh weight of the remaining plants was measured, and 4.0 g of the remaining grass was diluted with an amount of water equivalent to IK O per hectare and sprayed over the entire surface of the stems and leaves. Is the plant height of crabgrass 20C when treated? FI (about 5
leaves). The weed killing rate is shown as the average value of 10 consecutive times.
The fermentation results are shown in Table 4.

Table 4 Reference Examples 1, 2 and 3 are the same as Sample 0 used in Test Example 2.

When the composition according to the example of the present invention was used, it was found that the composition with a deviation of 7 had excellent amphoteric resistance compared to Reference Examples 1, 2, and 3.

Claims (1)

[Scope of Claims] 1. (a) SF-1293 substance or its salt; and (b) one or more sulfate-based, sulfonate-based, phosphate-based, or carboxylic acid-based anionic surfactants. , the ratio (weight ratio) of (a):(b) is 1:0.5 to 1
A herbicide composition characterized in that the herbicide composition contains: 2. (a) SF-1293 substance or its salt, (b) one or more sulfate-based, sulfonate-based, phosphate-based, or carboxylic acid-based anionic surfactants, and (c) polyoxyalkylene one or more types of nonionic surfactants, and the ratio (weight ratio) of (a):(b) is in the range of 1:0.5 to 1:20, and (a):(
A herbicide composition containing c) in a ratio (weight ratio) of 1:0.1 to 1:20.