JPS6328041B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to herbicidal compositions. That is, the present invention provides formula (A): (In the formula, M ₁ and M ₂ may be the same or different,
Hydrogen atom, sodium atom, potassium atom, lithium atom, copper atom, magnesium atom, calcium atom, zinc atom, nickel atom, manganese atom, ammonium, mono, di or tri lower alkylamine, mono, di or triethanolamine or mono , means di- or tri-lower alkylene amine, A is hydrochloric acid, sulfuric acid, hydrobromic acid,
Phosphoric acid, perchloric acid, nitric acid, acetic acid, propionic acid,
means an inorganic or organic acid which is citric acid, tartaric acid, monochloroacetic acid, trichloroacetic acid or trifluoroacetic acid, n means 0, 1/2 or 1)
SF-1293 substance represented by (hereinafter abbreviated as SF-1293) and its salts (hereinafter collectively referred to as SF-1293s), and (B) one type selected from gibberellins, that is, gibberellins A ₁ to A ₃₈ or more,
For example, weed killers containing gibberellin A ₃ (hereinafter abbreviated as GA ₃ ), a mixture of one or more selected from methionine, benzyladenine (hereinafter abbreviated as BA) and abscisic acid (hereinafter abbreviated as ABA) as an active ingredient. The present invention provides a drug composition. The present inventors previously studied the biological activities and uses of SF-1293s and found that they have extremely excellent herbicidal effects. In other words, we found that SF-1293 is effective against annual and perennial weeds and shrubs during the growing season, kills the above-ground parts by treating them with foliage, and has a strong inhibitory effect on their regeneration. , SF−
Completed the invention as a class 1293 herbicide (JP-A-Sho
54-67026). Furthermore, as a result of intensive research to take advantage of the characteristics of SF-1293, we have found that by mixing it with a transitional herbicide, etc., the contact effect of SF-1293 can be accelerated and the effect can be enhanced. , and more SF−
The transition type herbicidal effect, which is the greatest feature of Type 1293, that is, the regeneration suppressing effect, was significantly enhanced (Japanese Patent Application Laid-open No. 119034/1983). As a result of further intensive research into the composition of SF-1293 with other compounds, the present inventors found that (B)
The present invention was completed based on the discovery that the herbicidal effect of SF-1293 can be surprisingly enhanced by adding a compound having plant hormone activity within the range shown as an ingredient. In other words, SF-1293 itself has excellent herbicidal effects against a wide variety of annual and perennial weeds and shrubs when treated with foliar sprays; The herbicidal power of SF-1293 can be dramatically increased, synergistically, by spraying the leaves and foliage of plants with a composition containing a mixture of compounds listed as component (B) that do not have herbicidal activity. SF-
Compared to single drugs in class 1293, the dose required to produce the same medicinal effect can be reduced to 1/2 or less. The synergistic effect of the composition of SF-1293 and other compounds according to the present invention is clear from the biological test examples described below. In order to make it clear that it is a synergistic effect,
The widely used Colby calculation method (“Calculation of synergistic and antagonistic
responses of herbicide combinations”,
Weeds 15 (1967) pp. 20-22) was used.
According to Colby, the expected effect of a mixture of two drugs can be calculated as follows. E=X+Y−X・Y/100 (In the above formula, E means the kill rate, and E means the kill rate expected by mixing herbicide A at a dose of pg/10a and herbicide B at a dose of qg/10a.Actual kill rate If the ratio is greater than E, it indicates that the combination has a greater effect than an additive effect, that is, a synergistic effect.By Colby's method, in Test Examples 1 to 5 below, the present invention It is clear that compositions of SF-1293 and other compounds have significant synergistic action against a wide variety of annual and perennial monocotyledonous and dicotyledonous weeds. In agricultural land, it is used for weed control before sowing in fields, on rice field ridges and after mowing, in orchards and mulberry orchards, etc. In forest land, it is used for ground preparation by controlling weeds and shrubs. It can also be used to control weeds and bushes in pastures. It can also be used in non-agricultural areas such as factory sites, around railroad tracks, parks, public facilities, riverbeds, embankments, highways, golf courses, and fallow land. It can also be used to control weeds and shrubs. Furthermore, aquatic weeds and algae can be killed by underwater treatment. The blending range of the composition of the present invention and the amount of active ingredient applied per 10 ares are generally shown in Table 1. When applying, it is common to dilute the drug amount shown in the table with water at 10 to 250 per 10 ares, but preferably 25 to 250 per 10 ares.
The amount of water is 150. The blending ratio within this range can be changed freely, and formulation can also be freely carried out using common herbicide formulation methods.

[Table] When applying the composition of the present invention, any conventional method can be used, but in most cases, a suitable diluent can be used to prepare aqueous solutions, solutions, wettable powders, emulsions, etc.
Preparations such as powders and fine granules are mainly used. In preparing these preparations, octylphenyl polyoxyethanol, polyoxyethylene dodecyl ether, polyoxyethylene sorbitan fatty acid ester, polyoxyethylene alkylaryl ether, It is possible to add surfactants such as the following to ensure and improve the effect. Next, the composition of the present invention will be specifically explained with reference to Examples and Experimental Examples, but the present invention is not limited to the following Examples and Experimental Examples unless it exceeds the gist thereof. In the examples, percentages are by weight unless otherwise specified. Example 1 (Wettable powder) SF-1293 mono(diethanolamine) salt 15.0% GA ₃ 1.0 Diatomaceous earth 79.0 Nonionic surfactant 5.0 The above components are mixed uniformly and finely ground to prepare a wettable powder. When using, dilute with water and treat the leaves. Example 2 (Powder) SF-1293 monoisopropylamine salt 5.0% BA 1.0 Talc 94.0 The above components are mixed uniformly and ground to form a powder. Test Example 1 A pot with a diameter of 12 cm was filled with field soil, and the seeds were sown. When the seedlings were young, they were thinned out and planted to 10 plants. When the leaves were about 6, an aqueous solution containing predetermined doses of various salts of SF-1293, ABA, and a mixture of various salts of SF-1293 and ABA was sprayed over the entire foliage at a rate of 100 water per 10 are. The investigation was conducted on the 14th day after treatment, and the kill rate was expressed as a percentage (0%: harmless to 100%: complete death). In addition, using Colby's formula, 2
The expected value of the drug mixture was calculated and the presence or absence of a synergistic effect was investigated.

[Table] Test Example 2 Pots with a diameter of 12 cm were filled with field soil, wildflower seeds were sown, and 10 seedlings were thinned out when they were seedlings. At about 6 leaves (plant height 32-35 cm), the monosodium salt of SF-1293, GA ₃ methionine, BA and
Each single agent of ABA and the monosodium salt of SF-1293 and GA ₃ , ethephon, methionine, BA or
The prescribed dosage of the mixture with ABA is 100 per 10
The whole stem and foliage were sprayed with the amount of water. The investigation was conducted on the 14th day after treatment, and the kill rate was expressed as a percentage (0%: harmless to 100%: complete death). In addition, using Colby's formula, 2
The expected value of the drug mixture was calculated and the presence or absence of a synergistic effect was investigated. In Tables 3 to 6, the monosodium salt of SF-1293 is abbreviated as SF-1293Na.

【table】

【table】

[Table] Test Example 3 A pot with a diameter of 9 cm was filled with field soil, and golden millet seeds were sown, and after germination, the seeds were thinned out and six plants were planted. SF-1293 when about 6 to 7 leaves (average plant height about 30cm)
monosodium salt and each single agent of GA ₃ and
A predetermined amount of a mixture of the monosodium salt of SF-1293 and GA ₃ was sprayed over the entire foliage at a rate of 100 water per 10 are. The investigation was conducted in the same manner as Test Example 1, and the presence or absence of a synergistic effect was examined using Colby's equation.

【table】

[Table] Test Example 4 Pots with a diameter of 18 cm were filled with field soil, and 2 tubers of germinated porcupine were placed in each pot.After 5 weeks, at the 12th leaf stage, monosodium salt of SF-1293, GA ₃ , BA and ABA single agents and SF-
Monosodium salt of 1293 and GA ₃ , BA and ABA
A predetermined amount of the mixture was sprayed over the entire stems and leaves at a rate of 100 water per 10 are. A survey was conducted one month after the treatment, and the results are shown in percentages in Table 5 (0%: harmless to 100%: completely dead). As in Test Examples 1 to 3, the presence or absence of a synergistic effect was investigated using Colby's equation.

【table】

[Table] Test Example 5 Targeting crabgrass, Japanese knotweed, mugwort, halcyon, and chinensis during the mid-growth stage, a solution containing a prescribed dose of monosodium salt of SF-1293 and a single drug of GA ₃ and a prescribed dose of both drugs were tested in the field. The mixed solution was sprayed over the entire stem and leaves at a rate of 100 water per 10 are. The investigation was conducted one month after treatment, and the kill rate was expressed as a percentage (0%: harmless to 100%: complete death). The presence or absence of a synergistic effect was investigated using Colby's equation. In the following table, E is the expected value, O is the measured value,
* indicates that there is a synergistic effect.

【table】

【table】

Claims (1)

[Claims] 1 Formula (A): (In the formula, M ₁ and M ₂ may be the same or different, hydrogen atom, sodium atom, potassium atom, lithium atom, copper atom, magnesium atom, calcium atom, zinc atom, nickel atom, manganese atom, ammonium, mono , di- or tri-lower alkylamine; mono-, di- or triethanolamine; or mono-, di- or tri-lower alkyleneamine; A is hydrochloric acid, sulfuric acid, hydrobromic acid, phosphoric acid, perchloric acid;
SF- means an inorganic or organic acid which is nitric acid, acetic acid, propionic acid, citric acid, tartaric acid, monochloroacetic acid, trichloroacetic acid or trifluoroacetic acid, where n means 0, 1/2 or 1) Containing as an active ingredient a mixture of one or more selected from 1293 substances and their salts and (B) one or more selected from gibberellins, methionine, benzyladenine and abscisic acid. Characteristic herbicide compositions. 2. The composition according to claim 1, wherein component (B) is a gibberellin. 3. The composition according to claim 2, wherein the gibberellins are selected from gibberellin A ₁ to gibberellin A ₃₈ . 4. The composition according to claim 1, wherein component (B) is gibberellin _A3 . 5 Claim 1 in which component (B) is methionine
Compositions as described in Section. 6. The composition according to claim 1, wherein component (B) is benzyladenine. 7. The composition according to claim 1, wherein component (B) is abscisic acid.