JP2871113B2 - Herbicidal composition - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a herbicidal composition.

[0002]

2. Description of the Related Art In cultivating agricultural and horticultural crops, many herbicides have been used for weed control, which has required a great deal of labor. However, since it causes phytotoxicity to crops, remains in the environment, and is polluted, there is a demand for the development of a drug that can be used more reliably and safely with a lower dose.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to provide a herbicidal composition which has selectivity for corn and which has high efficacy against the important weeds of corn fields such as enokorogusa, onamimomi and the like.

[0004]

SUMMARY OF THE INVENTION The present invention provides

Embedded image (Wherein R ₁ is phenyl which may be substituted, R ₂ is the same or different and represents halogen, alkoxy, alkylthio, alkylsulfonyl, alkyl, alkoxyalkyl, alkoxycarbonyl, and n represents 0 to 4) Represent
R ₃ and R ₄ are the same or different and represent hydrogen or lower alkyl. ) And at least one selected from the group consisting of atrazine, cyanazine, bentazone, bromoxynil, 2,4-D, dicamba, nicosulfuron and primisulfuron-methyl. And a herbicidal composition characterized by containing

The above phenyl substituents for R ₁ may be the same or different and each may be halogen, hydroxy, nitro, cyano, alkyl, alkenyl, haloalkyl, haloalkenyl, alkoxy, haloalkoxy, haloalkenyloxy, alkylthio, alkenylthio. , Alkynylthio, haloalkylthio, haloalkenylthio, monoalkylamino, dialkylamino, alkoxyalkylthio, alkylthioalkylthio, alkoxycarbonyl, alkylcarbonylalkoxy, alkylcarbonyl, alkoxyamino, alkylsulfonyl, alkenylsulfonyl, alkynylsulfonyl, alkoxyalkylsulfonyl, Alkylthioalkylsulfonyl, alkylsulfonylalkylsulfonyl, haloalkylsulfonyl, alkoxyca Bonylalkylthio, alkoxycarbonylalkylsulfinyl, alkoxycarbonylalkylsulfonyl, alkylamide, aralkyloxy, optionally substituted phenyl, optionally substituted aralkyl, optionally substituted heterocycle, optionally substituted heterocycle Means a substituted alkyl group.

The compound represented by Chemical Formula 2 or a salt thereof is disclosed in Japanese Patent Application No. 2-174421, and can be produced by the following method. Production method (a) It is produced by the following chemical formula 3.

Embedded image (In the formula, n, R ₁ , R ₂ , R ₃ , and R ₄ have the same meaning as described above, and Q is a leaving group, meaning halogen, alkylsulfonate, phenylsulfonate, and the like.)

Production method (b) Among the compounds represented by the formula (2), when the 5-position of the bicyclo ring is mono-substituted other than alkoxycarbonyl, the compound can also be prepared according to the formula (4).

Embedded image (In the formula, r represents alkyl.)

[0008] Suitable agricultural and horticulturally acceptable salts include salts such as sodium, potassium, calcium and ammonium salts.

Hereinafter, the compound represented by the formula (2) is represented by [A],
A compound selected from the group consisting of atrazine, cyanazine, bentazone, bromoxynil, 2,4-D, dicamba, nicosulfuron, and prisulfuron-methyl is abbreviated as [B].

[0010] The composition of the present invention comprising [A] and [B] has a wider range of weed killing beyond the application range obtained with each single agent, and at the same time, hasten the completion of the herbicidal effect. Furthermore, it was found that the effect was sufficiently exhibited even when the doses were lower than the dose of a single product, the safety against corn was secured, and a sufficient herbicidal effect was exhibited by a single foliage treatment.

The practical weight ratio of [A]: [B] is preferably from 4: 1 to 1:25, more preferably from 1: 1 to 1:25.
1: 125.

When the herbicidal composition of the present invention is applied, the aforementioned active ingredient compounds [A] and [B] are mixed with various auxiliaries in accordance with a general method of agrochemical formulation, for example, in the form of a wettable powder or an emulsion. The active ingredient compounds may be mixed and formulated at the same time, or those separately formulated may be further mixed. Examples of the carrier or diluent include an inert solid carrier such as clay, talc, bentonite, calcium carbonate, diatomaceous earth, white carbon (silica), and an inert liquid carrier such as water or an organic solvent. Surfactants and various polymer compounds may be added to enhance the biological effect or improve the properties of the preparation. Of course, it is not limited only to these.

[0013]

The present invention will be further described with reference to examples and reference examples. Parts represent parts by weight. The above components are uniformly mixed and finely pulverized to obtain an active ingredient of 26.6.
% Wettable powder was obtained.

[0014] The above components were uniformly mixed and finely pulverized to obtain a wettable powder with an active ingredient of 20%.

[0015]

[0016]

Test Example 1200 A pot of 1200 cm ² was filled with soil, and various seeds of Aquino nokorogosa, Onamomi and maize (variety: Pioneer 3358) were sown on the surface layer, lightly covered with soil, and grown in a greenhouse. Maize plant height is about 2
3cm, Aquino nokorogosa and Onami fir 9-1
At the time of growth to 2 cm, the reagent was adjusted to a predetermined concentration according to the example, and uniformly sprayed on the foliage of the plant with a small sprayer at a rate of 50 liter / 10a. Three weeks after the treatment, the herbicidal effect on the plants was examined according to the following criteria. The results are shown in Table 1.

[0017] Numerical values of 1, 3, 5, 7, and 9 indicate intermediate values between 0, 2, 2, 4, 4, 6, 6, 8, and 8, respectively. The herbicidal rate was calculated by the following equation (1).

[0018]

(Equation 1)

[0019]

[Table 1]

[Table 2]

[Table 3]

[Table 4]

[Table 5]

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code FI A01N 41/10 A01N 41/10 Z 43/64 104 43/64 104 43/70 43/70 43/88 105 43/88 105

Claims (1)

(57) [Claims] (1) Chemical formula (1) (Wherein R ₁ is phenyl which may be substituted, R ₂ is the same or different and represents halogen, alkoxy, alkylthio, alkylsulfonyl, alkyl, alkoxyalkyl, alkoxycarbonyl, and n represents 0 to 4) Represent
R ₃ and R ₄ are the same or different and represent hydrogen or lower alkyl. At least one compound selected from the group consisting of atrazine, cyanazine, bentazone, bromoxynil, 2,4-D, dicamba, nicosulfuron, and primisulfuron-methyl. And a herbicidal composition comprising: