JPS5962507A - Herbicide composition - Google Patents

Abstract

PURPOSE:An agent containing a mixture of N-4-chlorophenyl-3,4,5,6-tetrahydrophthalimide and another compound as an active ingredient, controlling various kinds of weeds in lawn perfectly by the synergistic effect through one applicattion, having no phytotoxicity to lawn. CONSTITUTION:N-4-Chlorophenyl-3,4,5,6-tetrahydrophthalimide showing improved herbicidal effect on large crab-grass, polygonaceous weeds, common lamb's- quaters, Amarenthus viridis L., etc. by treatment before germination is blended with 2-chloro-4-ethyamino-6-isopropylamino-S-triazine showing improved herbicidal effect on low spear grass, etc. in a weight ratio of (1:1)-(8:1) to give an active ingredient. The mixture is blended with a carrier and an auxiliary, manufactured into a preparation such as granule, wettable powder, etc., and used. The amount of the active ingredient used is 5-20g/a. The agent is useful for places having lawn of large area such as especially a golf course, etc., safe, and preferable with respect to labor and economy.

Description

[Detailed description of the invention] The present invention relates to herbicidal compositions.

The present invention relates to a highly safe herbicide composition that completely controls a wide range of weeds in a ridged lawn and causes no harm to the lawn.

Many herbicides for lawns have already been provided and put into practical use, but lawn weeds range from annual to perennial, and they occur in large quantities, as well as due to changes in soil quality, climate, etc. However, this causes fluctuations in herbicidal efficacy and phytotoxicity, and is a factor that prevents wide-area application.

Therefore, complete eradication can be achieved with − times of herbicide application.
Currently, the same or different herbicides are sprayed several times. Such multiple application of herbicides is not a fool's errand, requiring a great deal of spraying effort, and also has undesirable problems such as chemical damage to lawns and residue in the soil due to large amounts of application.

Therefore, the present inventors aimed to improve these problems by completely controlling all weeds with a single spraying, and in addition, the treatment can be applied from before weed germination to during the growing season, and furthermore, it can be applied to lawns. has been searching for highly safe herbicides.

As a result, the inventors came to the knowledge that the intended purpose could be achieved by a herbicidal composition comprising a combination of specific compounds, and were able to complete the present invention.

That is, the gist of the present invention is that (a) N-guchlorphenyl-3,<z, t, 4-tetrahydrophthalimide and (b) 2-chloruda-ethylamino-6
The patented composition is characterized in that it contains -itupropylamino-S, -triazine as an active ingredient.

To explain the present invention, the herbicidal composition ri of the present invention, the first component N-darklorphenyl-3°Q,! i, A-
Tetrahydrophthalimide [hereinafter abbreviated as (a)] and the λth
It consists of a combination of one of the components, Roru-l-ethylamino-O-improvylamino-S-triazine [hereinafter abbreviated as (1,)].

The first component (a) is known to be highly effective in pre-emergence treatment on crabgrass, knotweed, whitewort, silverfish, etc. (Tokukosho+r-ii'yaθ) has a herbicidal effect on silverwort, oxalis, etc. is insufficient.

On the other hand, the component ('b) is known to be highly effective against Sparrowfly 2 and the like. However, on the other hand,
The herbicidal effect on grasshoppers, bluegrass, etc. is insufficient.

As described above, each of the components (a) and (b) does not have a sufficient herbicidal spectrum when used as a single agent, and the treatment period is also limited, but according to the present invention, the first component (a) and the third component (b) ) in combination, it is possible to expand the herbicidal spectrum, increase the herbicidal effect, and extend the treatment period, which could not be demonstrated in the examples described below.

The blending ratio (elimination ratio) of the first component and the second component of the herbicidal composition of the present invention is generally /:/ to za:/, preferably -2/ to 6:/.

In the present invention, the first component and the third component are usually mixed with an inert liquid carrier or solid carrier, a suitable surfactant etc. are added thereto, and the formulation is processed into emulsions, powders, etc. using known formulation methods. It is used in the form of granules, tablets, hydrating agents, etc.

Liquid carriers include toluene, xylene, methylnaphthalene, cyclohexane, butanol, glycol, dimethyl sulfoxide, dimethylformamide, acetone,
Methyl isobutyl ketone, animal and vegetable oils, fatty acids, fatty acid esters, water, etc., and solid carriers include clay, kaolin clay, talc, bentonite, diatomaceous earth, silica, calcium carbonate, and vegetable powders such as soy flour and wheat flour. can be given. If necessary, it can also be used in combination with other active ingredients, such as industrial fungicides, insecticides, nematicides or other herbicides, plant growth regulators, soil conditioners and fertilizers. . Further, in order to obtain a reliable herbicidal effect, auxiliary agents such as a spreading agent, an emulsifier, a wetting agent, and a fixing agent may be appropriately mixed.

The fecal dose of the herbicide composition of the present invention is determined based on the target weed, treatment time,
Although it varies depending on the treatment method and the conditions such as the nature of the soil, the total amount of the first component and the second component as active ingredients is usually in the range of 5 to -0 grams per area.

As explained in detail above, the combination of the first component and the second component has a high herbicidal effect, expands the herbicidal spectrum that cannot be obtained with the dosage of each agent alone, and allows for a wider range of application times. In contrast to the case where a sufficient effect cannot be obtained by using each component alone in the growing season treatment, the treatment period is extended to the growing season treatment, and a herbicide composition with low chemical damage to lawns can be obtained.

Therefore, the herbicide composition of the present invention is more labor-intensive and economical than the currently applied herbicide application method, especially in situations with extremely large areas of lawn such as golf courses. It is desirable and extremely useful.

The present invention will be explained in more detail below using Examples and Test Examples.

Examples (Irrigation agent) (a) or (b), to 31 parts, Opryto≠/3θθ (Hokushu Shimodosha song title, main component: diatomaceous earth) lI
Part by weight of Hiro, 3 parts by weight of Sunextract P-,25,2 (trademark of Sanyo Kokusaku Pulp Co., Ltd., sodium lignin sulfonate) and higher alcohol sulfate ester surfactant Nlubol g0
3 parts by weight of 7θ (trademark of Toho Chemical Co., Ltd.) was blended and uniformly mixed and ground to obtain a wettable powder.

Test Example / 500 minutes / Transplanted Coralysia to R.Wagnerbot, and sowed the seeds of Lamium japonica, Psyllium japonica, and Blueberry on the soil surface layer, and before the emergence of each weed, (a) and (b) obtained in Example were Dilute and mix the prescribed leaves of the irrigation agent with water,
A small spraying machine was used to spray the soil surface and the leaves and stems of Coralicia japonica at a liquid volume of R to θt.

After 10 days of treatment, 11 meals were given to evaluate the herbicidal effect and the damage caused to Oriental chinensis. In addition, the herbicidal effect and phytotoxicity are indicated as mF> below.

Weeding effect O: No herbicidal effect /: Weeding effect less than Koda attack Weeding effect of Koni 2S~3'1% 3: 33 ~ Dada lI: qs~S Hiro & : j, lI’~A’I A:Aj~7t 7:73～gke g:g left~9’1 9:93~q9 10　2　/θO Against Coralai Shiba! ! m: No chemical damage ±: o-, t% drug damage 廿：/l〜30　　′! Kan: 3/~iooke The results are shown in Table/.

Test Example: (500θ min//Earl Wagnerbot) Transplanted Coralicia japonica, and sowed the seeds of C. elegans, Oxalis, Oxalis, and Polygonum on the soil surface, and during the growth period of each weed, (a) and ( The irrigation agent b) was mixed and diluted with water, and the solution was uniformly sprayed on the leaves at a volume of 101 per area.

20 days after the treatment, the herbicidal effect and the chemical damage to Coralysia were investigated. The herbicidal effect and phytotoxicity labeling is the same as in Test Example/.

The results are shown in the table.

Test example 3! Transplant Coralysia to a rooo minute/Earl Wagner pot, sow Lamium or Psyllium on the surface layer of the soil, and before germination, /,! The chemical was sprayed in the same manner as in the test example/or in the F-leaf stage, Da, and S-leaf stages of growth, and 20 days later, the herbicidal effect and mulberry repellency against Coralicia were investigated. The herbicidal effect and phytotoxicity labeling was the same as in Test Example/, and the results are shown in Figure 3.

table/ Front side *: Indicates the leaf stage or plant height at the time of chemical spraying.

Table 3 Sender: Mitsubishi Chemical Industries, Ltd. Representative Patent Attorney Naga Kagawa - Others/names

Claims (1)

[Claims] (υ (a) N −'I-riTel /l/ 7 x
= /l/ -J, II,! , A-tetrahydrontalimide, and (b) 2-chloro-q=ethylamino-6-ingrobylamino-S-) riazine as active ingredients.