JPS6363530B2 - - 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, alkali metal atom, alkaline earth metal atom, copper atom, zinc atom, nickel atom, manganese atom, ammonium, mono-, di- or means tri-lower alkyl substituted ammonium, mono-, di- or tri-ethanol substituted ammonium, or mono-, di- or tri-lower alkylene substituted ammonium, where A is hydrochloric acid, sulfuric acid, hydrobromic acid, phosphoric acid, means an inorganic or organic acid such as chloric acid, sulfuric acid, acetic acid, propionic acid, citric acid, tartaric acid, monochloroacetic acid, trichloroacetic acid or trifluoroacetic acid, where 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), (B) 1,1'-ethylene-2,2'-bipyridylium salt, In particular, dibrome salt (hereinafter abbreviated as Dikote), 1,1'-dimethyl-4,4'-bipyridylium salt, especially dichlor salt (hereinafter abbreviated as paraquat), bis(monomethyl sulfate) salt, bis(O,
O-dimethyl phosphate) salts, 1-methyl-4-phenylpyridylium salts, especially chlor salts (hereinafter abbreviated as Cypercoat), O,O-dimethyl phosphates, etc., 1,1'-bis (3,5-dimethylmorpholinocarbonylmethyl)-4,4'-bipyridylium salt,
Especially dichlor salt (hereinafter abbreviated as Morphuncoat)
The present invention provides a herbicidal composition containing as an active ingredient one or a mixture of two or more selected from the following. The present inventors previously conducted research on 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. ,SCIENCE FICTION
Completed the invention as a class -1293 herbicide (Japanese Unexamined Patent Publication No. 1983-67026). Furthermore, as a result of extensive research to take advantage of the characteristics of SF-1293, we have found that the medicinal efficacy of SF-1293 can be significantly enhanced by mixing it with transitional herbicides, plant growth regulators, etc. Kaisho 54-119034
No. and Patent Application No. 1972-172122 JP-A-57-095903
issue). As a result of further intensive research on mixtures of SF-1293 and other compounds, the present inventors found that (B)
The present invention was completed by discovering that the herbicidal effect of SF-1293 was surprisingly enhanced by blending extremely small amounts of the compounds listed as ingredients and applying the mixture to weeds. That is, the compounds listed as component (B) above are contact herbicides that use foliar treatment, but these compounds are used in extremely small amounts (for example, 1/100 or less of the practical dosage).
(doses that have no medicinal effect on their own),
When combined with SF-1293 and treated, the killing effect and regeneration inhibiting effect of SF-1293 against annual and perennial weeds and shrubs is dramatically enhanced (synergistic effect), and the Compared to a single drug, the dose of SF-1293 class to exhibit the same medicinal efficacy can be reduced to 1/2 or less, demonstrating that the addition of ultra-trace amounts of component (B) compounds is extremely useful. I found it. The synergistic effect of the combination of SF-1293 and other compounds according to the present invention is demonstrated by the biological test examples described below. In order to clarify that it is a synergistic effect, Colby's calculation method (“Calculation of synergistic and antagonistic effect”) is widely used.
responses of herbicide combinations”, Weeds
15, (1967), pp. 20-22). According to Colby, the expected value of the effect of a mixture of two drugs can be calculated as follows. E=X+Y-X・Y/100 (In the above formula,
Y means the killing rate due to the herbicide B at the dose of q grams/10a, and E means the killing rate due to the herbicide A at the dose of p grams/10a and the herbicide at the dose of q grams/10a. It means the kill rate expected by mixing with the amount of herbicide B. If the actual killing rate is greater than E, this indicates that the combination has a greater effect than an additive effect, that is, a synergistic effect. According to Colby's method, in Test Examples 1 to 3,
It is clear that the mixtures of SF-1293 and other compounds of the present invention have a significant synergistic effect against a wide variety of annual and perennial monocotyledonous and dicotyledonous weeds. Regarding the usage of the composition of the present invention, in agricultural land, it is used for weed control before field sowing, weed control on rice field ridges and after mowing, weed control in orchards and mulberry orchards, etc., and in forest land, it is used for weed control. It can be used to prepare the ground by controlling weeds and shrubs, and also to control weeds and shrubs in pastures. It can also be used to control weeds and shrubs in non-agricultural lands such as factory sites, around railroad tracks, parks, around public facilities, riverbeds, embankments, expressways, golf courses, and fallow land. Furthermore, aquatic weeds and algae can be killed by underwater treatment. The blending ratio range of components (A) and (B) in this composition and the application amount of active ingredients (A) and (B) per 10 ares are usually as shown in Table 1. Generally, the amount of the drug shown in the table is diluted with 10 to 250 water per 10 are, and preferably the amount of water is 25 to 150 per 10 are. The blending ratio within this range can be changed freely, and the formulation can be freely carried out using common herbicide formulation methods. [Table] When actually applying the composition of the present invention, any conventional method can be used, but in many cases, a suitable diluent can be used to form an aqueous solution, solution, wettable powder, emulsion, or powder. , microgranules and other formulations 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 a nonionic surfactant such as 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 (Liquid) Monosodium salt of SF-1293 substance 10.00% Paraquat 0.05 Octylphenyl polyoxyethanol 15.00 Methyl parahydroxybenzoate 0.15% Water 74.80 Mix and dissolve the above components and dilute with water before use for foliage treatment. A liquid composition to be used is prepared. Example 2 (hydrating agent) SF-1293 substance mono (diethanol ammonium)
Salt 15.0% Diecoat 0.1 Diatomaceous earth 79.9 Nonionic surfactant 5.0 Mix the above ingredients uniformly and finely grind to make a wettable powder. When using it, dilute it with water and treat the foliage. Example 3 (Powder) SF-1293 substance monoisopropylammonium salt
20.0% Morph Uncoat 0.1 Talc 79.9 Mix the above ingredients uniformly and grind to form a powder. Test Example 1 A pot with a diameter of 12 cm was filled with field soil, and an appropriate amount of crabgrass seeds were sown and lightly covered with soil. After that, the plant height is 40
At the time of cm, a predetermined amount of the SF-1293 substance, its various salts, paraquat, and a mixture of the SF-1293 substance, its various salts, and paraquat were sprayed over the entire foliage at a water rate of 100 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] [Table] [Table] Test Example 2 A pot with a diameter of 12 cm was filled with field soil, and an appropriate amount of crabgrass seeds were sown and lightly covered with soil. After that, the plant height is 40
SF-1293 substances monosodium salt, Dikoat, Paraquat, Cyperkot, Morphunkoat, 1,1'-dimethyl-4,4'-bipyridylium bis(monomethyl sulfate) salt and bis(O , O-dimethyl phosphate) salts and SF
-1293 Substances Sodium Salt and Dicoat, Paraquat, Cypercoat, Morphuncoat, 1,
The prescribed dosage of the mixture with 1'-dimethyl-4,4'-bipyridylium bis(monomethyl sulfate) salt or bis(O,O-dimethyl phosphate) salt per 10 ares.
The entire stem and leaves were sprayed with a water volume of 100%. The investigation method was the same as Test Example 1. In addition, using Colby's formula, the expected value of a two-drug mixture was calculated from the measured value of each single drug, and the presence or absence of a synergistic effect was investigated. In addition, Table 3-5
In, SF-1293 substance monosodium salt was converted into SF
It is abbreviated as −1293Na. [Table] [Table] [Table] [Table] Test Example 3 Each monosodium salt of the SF-1293 substance and paraquat were tested in the field on crabgrass, Japanese dogfish, Japanese knotweed, mugwort, halcyon, Japanese sedge, and Japanese commonweed in the middle of the growing season. An aqueous solution containing a predetermined amount of the drug and a mixture of both drugs was sprayed over the entire stems and leaves at a rate of 100 water per 10 are. The survey was conducted one month after treatment, and the mortality rate was expressed as a percentage (0%:
Harmless to 100%: completely dead). Furthermore, Colby's equation was used to examine whether there was a synergistic effect. In Tables 4 and 5, E indicates an expected value, O indicates an actual value, and * indicates a synergistic effect. [Table] [Table] [Table]

Claims (1)

[Claims] 1 (A) Formula (): (In the formula, M ₁ and M ₂ may be the same or different, hydrogen atom, alkali metal atom, alkaline earth metal atom, copper atom, zinc atom, nickel atom, manganese atom, ammonium, mono-, di- or means tri-lower alkyl substituted ammonium, mono-, di- or tri-ethanol substituted ammonium or mono-, di- or tri-lower alkylene substituted ammonium;
A means inorganic acid or organic acid, n is 0, 1/2
(B) 1,1'-ethylene-2,2'-bipyridylium salt, 1,1'- selected from dimethyl-4,4'-bipyridylium salt, 1-methyl-4-phenylpyridylium salt and 1,1'-bis(3,5-dimethylmorpholinocarbonylmethyl)-4,4'-bipyridylium salt A herbicide composition containing one or a mixture of two or more as an active ingredient. 2. The composition according to claim 1, wherein component (B) is 1,1'-ethylene-2,2'-bipyridylium dibrome salt. 3 Component (B) is 1,1'-dimethyl-4,4'-bipyridylium dichloro salt, bis(monomethyl sulfate)
The composition according to claim 1, which is a salt and/or a bis(O,O-dimethylphosphate) salt. 4. The composition according to claim 1, wherein component (B) is 1-methyl-4-phenylpyridylium chloride salt and/or O,O-dimethyl phosphate. 5. The composition according to claim 1, wherein component (B) is 1,1'-bis(3,5-dimethylmorpholinocarbonylmethyl)-4,4'-bipyridylium dichloride.