HU194699B - Sinergetic herbicid mixture containing as active substance benzamisole, diuron and/or linuron - Google Patents

Abstract

Prepn. contains N-(3-(1-ethyl-3-methyl-propyl) isooxazol-5-yl)-2,6 -dimethoxy-benzamide (benzamizol), N'-(3,4-dichloro-phenyl)-N,N -di:methyl-carbamide (diuron) and/or N'-(3,4-di:chloro-phenyl)-N -methoxy-N-methyl-carbamide (linuron).

Description

The present invention relates to a broad-spectrum, synergistic herbicidal composition comprising two or three active compounds, the active ingredient of which is N [3- (1-ethyl-3-methylpropyl) -isoxazol-5-yl] -2,6-dimethoxybenzamide (benzamizole). ), N '- (3,4-dichlorophenyl) -N, N-dimethylurea (diuron) and / or N' - (3,4-dichlorophenyl) -N-methoxy-N-methylurea (linuron).

. The herbicidal compositions of the present invention containing two or three active ingredients selectively kill weeds in crop plants, such as perennial alfalfa, apples, pears, and vines, without damaging the crop.

N- [3- (1-ethyl-3-methylpropyl) -isoxazol-5-yl] -2,6-dimethoxybenzamide is disclosed in British Patent 2084140. Diuron is disclosed in U.S. Patent Nos. 2,655,445 and linuron is described in U.S. Patent Nos. 2,960,534 and 3,079,244.

Herbicides containing diuron or linuron have already been widely used for the chemical weed control of crops, such as vines and orchards. However, a relatively high application rate of 1.5-2 kg / ha is required for effective application, which can often cause phytotoxic damage. Due to persistence, the formulation containing the active ingredient diuron should not be used repeatedly in high doses for several years.

It was found that N- [3- (1-ethyl-3-methylpropyl) -isoxazol-5-yl] -2,6-dimethoxybenzamide, N '- (3,4-dichlorophenyl) -N , Single treatment in herbicides with herbicides containing two or three active substances selected from N, N-dimethylurea and N '- (3,4-dichlorophenyl) -N-methoxy-N-methylurea is sufficient for effective control of monocotyledonous and dicotyledonous weeds without any appreciable damage to the crop plants, and compositions containing said active ingredients have a synergistic effect, that is, their effect is greater than the combined effect of the two or three active ingredients.

The herbicidal compositions according to the invention thus comprise as active ingredient benzamizole and diuron, or a mixture of benzamizole and linuron or benzamizole, diuron and linuron (1: 1) to (1: 3) and 1: (1-3): (1-3) weight ratio.

The weight ratio of active ingredients in the mixture to two active ingredients is preferably 1: 2; The weight ratio of 3 to 1 active ingredient is preferably 1: 2: 2.

The amount of herbicidal composition according to the invention to be used, depending on the total active ingredient, may generally be 0.5 to 10 kg, preferably 3 to 5 kg, depending on the type of treatment, weather and climatic conditions, soil composition, nature and maturity of crops and weeds depending on the degree of weed infestation. It is preferable that the treatment is carried out during the autumn or spring, during the period of vegetation break.

The composition according to the invention may contain, in addition to the active ingredient mixture, auxiliaries customary in agricultural practice. Formulations of the present invention include, for example, wettable or suspensible powders, granules, pastes, emulsion concentrates, solutions, sprays, suspensions, dusting or spraying agents.

Generally speaking, the compositions of the present invention may be in any of the formulations in which the individual active ingredients are contained, provided that they are compatible with each other.

Excipients may be carriers or diluents, as well as surfactant additives and, if appropriate, other special excipients.

The carrier or diluent may be a solid or ⁷ liquid such as synthetic or natural rock powders or granules, such as talc, kaolin, dolomite, clay, diatomaceous earth, bentonite, attapulgite, silicate, silica, silica ground, powdered or granular form and plant origin material as well as fertilizer.

The liquid carrier or diluent is, for example, a petroleum fraction, an aliphatic, aromatic or alicyclic hydrocarbon or derivative thereof, such as an alcohol, ketone, ester, amide, halogenated hydrocarbon or water.

The surfactant additive is an ionic or nonionic dispersing, emulsifying or wetting agent and is generally present in an amount of 0.1 to 10% by weight.

When the carrier or diluent is water, the composition of the invention will generally always contain a surfactant.

Dispersing and wetting agents for the preparation of wettable powders include salts of acylaminosulfonic acids, alkylnaphthalenesulfonic acids, lignin sulfonic acid salts, ethylene oxide addition products of alkylphenols; Salts of aromatic sulfonic acids for emulsifiable concentrates, ethylene oxide addition products of fatty acid esters of polyhydric alcohols, ethylene oxide addition products of fatty acid polyethylene glycol, thiol derivatives, ethylene oxide addition products. Reference is made to the literature on useful surfactants.

The formulations may contain other additives such as tackifier, penetration enhancer, stabilizers, anti-freeze, etc. may also be included.

Other herbicides and their active ingredients may also be incorporated into the herbicidal composition according to the invention. Mention may be made of insecticides, bactericides, fungicides, growth regulators and fertilizers.

The total active ingredient content of the compositions of the invention is generally 0.01 to 60% by weight, preferably 0.1 to 40% by weight.

The formulation may be applied by spraying, spraying, dusting, sprinkling, spraying, optionally after dilution with water or other suitable solvent, and optionally incorporated into the soil. The treatment is carried out before or, preferably, after emergence of the commercial weeds.

The present invention also relates to a method of controlling weeds which comprises treating plants or soil with an effective amount of a composition according to the invention.

When the composition according to the invention has some benefit-23

194,699 plants are less tolerant, we apply a method of application whereby the composition can be applied only to weeds or to the open ground.

The composition according to the invention comprises the two or three active compounds in admixture, but is equivalent and also encompasses a composition which is prepared by mixing the compositions containing the individual active ingredients immediately before use. 10: Similarly, it is within the scope of the present invention to carry out weed control directly or sequentially with formulations containing each of the active ingredients.

The effects of the herbicidal compositions of the present invention are described in detail in the following examples.

The active ingredients are designated as follows:

N - [3- (1-ethyl-3-methylpropyl) -isoxazol-5-yl] -2,6-dimethoxybenzamide (500 g / l suspension for suspension); Manufacturer: Eli Lilly Co.

II N '- (3,4 - dichlorophenyl) - N, N - dimethylurea (80% wettable powder); (Karmex®; manufactured by duPont USA)

III N '- (3,4 - dichlorophenyl) - N - methoxy - N - methylcarbamide (50% wettable powder). (Lorox®; manufactured by du Pont USA). ₃ θ

In the tests, the active ingredient or mixture of active ingredients in the form of the above commercial emulsifiable concentrate or wettable powder formulation is made by spraying with _S5 dilution and mixing with 500 liters / ha of water. needles for treatment.

Example 1

In field experiments with small parcels, two-year-old (established) alfalfa (Medicage sativa) plantations were treated with a 1: 2 mixture of active substances I and II in March at the rate of 0.5 + 1 kg / ha before starting the vegetation. As a result of the treatment, the alfalfa is not damaged, so the mixture of the two active substances is suitable for selective treatment.

In the open air, various monocotyledonous and dicotyledonous weeds and plant parasites (Cuscuta trifolii (aranka)) were sown in Medicago sativa 0ucerna). Each parcel was treated with spray liquors containing the following active compounds or mixtures thereof:

I 0,25 and 0,5 kg / ha,

II 0.5 and 1 kg / ha,

I + II 0.25 + 0.5 and 0.5 + 1 kg / ha.

28 to 30 after treatment. On the 7th day, it was found that the spray juice containing the mixture of the two active substances completely destroyed the monocotyledonous and dicotyledonous weeds and the aranka parasite and the crop plants were not damaged.

The results are shown in Table I below.

The results confirm the selective, synergistic herbicidal activity of the two active ingredients.

Table I

Plants ] 0.25 Mark and amount of active substance (kg / ha) 0.5 II I + II 0.5 1 0.25 + 0.5 0.5+ 1 utility Plant Medicago sativa 0 0 0 0 0 0 weeds Echinochloa crus-galli 0 0 75 85 100 100 Setaria virldis 0 0 70 80 100 100 Polygonum persicaria 60 90 85 95 100 100 Chenopodium album 70 80 90 100 100 100 Vegetable parasite Cuscuta trifolii 35 85, 5 20 100 100

= no damage 100 = total destruction

194,699

Example 2

In the open air, we planted various monocotyledonous and dicotyledonous weeds and plant parasites [Cuscuta trifolii (aranka)] in a two-year Medicago sativa (alfalfa) plantation. Each parcel was treated with spray liquors containing the following active compounds or mixtures thereof.

I 0,25 and 0,5 kg / ha,

III 0.5 and 1 kg / ha,

I + III 0.25 + 0.5 and 0.5 + 1 kg / ha.

On the 30th day after the treatment, it was found that the spray juice containing the mixture of the two active substances completely destroyed the monocotyledonous and dicotyledonous weeds and the parasitic testicular choke and the crop plants were not damaged.

The results are shown in Table II. See Table 1.

The results demonstrate the selective synergistic herbicidal activity of the composition of the invention.

Example 3

In the open air, we planted various monocotyledonous and dicotyledonous weeds and a plant parasite [Cuscuta trifolii (aranka)] in a two-year Medicago sativa (alfalfa) plantation. Each parcel was treated with spray liquors containing the following active compounds or mixtures thereof:

I 0,25 and 0,5 kg / ha,

II 0,5 and 1 kg / ha,

Hi 0.5 and 1 kg / ha,

I + II + III 0.25 + 0.5 + 0.5 and 0.5 + 1 + 1 kg / ha.

On the 30th day after treatment, it was found that the spray juice containing the mixture of the three active substances completely destroyed the monocotyledonous and dicotyledonous weeds and the parasitic testicular choke and did not damage the crop plants.

The results are shown in Table III. See Table 1.

The results demonstrate the selective synergistic herbicidal activity of the composition of the invention.

II. spreadsheet

Plants

Mark and amount of active substance (kg / ha)

Ill I + III

0.25 0.5 0.5 1 0.25 + 0.5 0.5 + utility Plant Medicago sativa 0 0 0 0 0 0 weeds Echinochloa crus-galli 0 0 60 65 95 100 Setaria viridis 0 0 25 50 90 100 Polygonum persicaria 60 90 75 80 100 100 Chenopodium album 70 80 80 85 100 100 Vegetable parasite Cuscuta trifolii 35 85 5 15 100 100

= no damage 100 = total destruction

III. spreadsheet

Plants

I

0.25 0.5

Mark and amount of active substance (kg / ha) II III

0.5 · 1 0.5 1

I + Π + III 0.25 + 0.5 + 0.5 0.5 + 1 + 1

Harvest Medicago sativa Weeds Echinochloa c.g. Setaria viridis

0

85

80

0

65

50

0

100 100 100 100

-4Ί

194,699 δ

III. spreadsheet

Mark and amount of active substance (kg / ha)

Plants I - 0.25 0.5 11 0.5 1 III 0.5 1 I + 11 + III 0.25 4- 0.5 + 0.5 0.5 + 1 + 1 Polygonum pers. 60 90 85 95 75 80 100 100 Chonepodium album Cuscuta trifolii 70 80 90 100 80 85 100 100 (parasite) 35 85 5 20 2 15 100 100

= no damage 100 = total destruction

On the 30th day after the treatment, it was found that the permeate containing the mixture of the three active ingredients completely destroyed the monocot and dicot weeds and did not damage the crop plants.

The results are shown in Table IV. See Table 1.

Example 4

In the open air, we have sown various monocotyledonous and dicotyledonous weeds in three-year plantings of Vitis vinifera (grape), Malus domestica (apple) and Pyrus communis (pear), supplementing the natural weed flora. 25 Each parcel was treated with pennet juices containing the following active substances or mixtures thereof:

I 0.5 and 1 kg / ha, ₃₀

II 1 and 1,5 kg / ha,

III 1 and 1,5 kg / ha,

I + II + III 0.5 + 1 + 1 and 1 + 1.5 + 1.5 kg / ha.

ARC. spreadsheet

Mark and amount of active substance (kg / ha)

Plants I II Ili I + II + III

0.5 1 1 1.5 1 1.5 0.5 + 1 + 1 1 + 1.5 + 1 _; crops Vitis vinifera 0 0 0 0 0 0 0 0 Malus domestica 0 0 0 0 0 0 0 0 Pyrus communis 0 0 0 0 0 0 0 0 Weeds (a) Species sown Echinochloa c.g. 0 0 80 90 65 70 100 100 Setaria viridis 0 0 80 90 45 55 100 100 Polygonum pers. 70 95 90 95 80 85 100 100 Chenopodium album 85 95 95 100 85 95 100 100 (b) natural flora Amaranthus retr. 35 60 60 70 50 60 100 100 Matricaria ino. 45 60 80 90 70 80 100 100 Erigeron can. 55 65 80 95 45 60 100 100 Sinapis arvensis 65 75 80 95 85 95 100 100

= no damage 100 = total destruction

194,699

Example 7

The results demonstrate the selective synergistic herbicidal activity of the composition of the invention.

Similar synergistic selective herbicidal activity has been observed for example on hortens (Allium cepa), carrot (Daucus carota) and parsley (Petersilliun) hortense) with the compositions of the invention.

The composition of some representative agents of the herbicidal compositions of the present invention is described in the following examples.

Wettable powder

I active ingredient 15 wk Active ingredient II 25 tr oleic acid methyl tauride, sodium salt 2 weeks ligmnszulfonsav sodium 3 months powdered silica gel 45 tr

I active ingredient Example 5 Wettable powder 10 tr Active ingredient II 20hrs diisobutyl naphthalene sulfonic acid sodium salt 5 tr kaolin 65 tr

The powder mixture obtained by mixing and grinding the ingredients can be diluted with water to the desired concentration before use.

Example 8

Wettable powder

I active ingredient 10 tr Active ingredient II 20hrs Active ingredient III 20hrs nonyl phenyl polyethylene glycol ether 3 months naphthalenesulfonic acid and formaldehyde sodium salt of condensate 3 months powdered talc 44 tr.

The homogeneous powder obtained by mixing the ingredients can be diluted with water to the appropriate concentration.

Example 6

Emulsifiable concentrate

Active ingredient I 10 tr.

Active ingredient III 20 tr.

Sodium salt of dodecylbenzenesulfonic acid 5 tr.

ethanol 65 tr.

The emulsifiable concentrate obtained by mixing the ingredients can be diluted with water to the desired concentration before use.

Claims (1)

Synergistic herbicidal composition characterized in that, in addition to inert excipients, the active ingredient is 0.01-60% by weight of the total amount of N- [3- (1-ethyl-3-methylpropyl) -isoxazol-5-yl] -2,6-di35-methoxy. benzanide and N '- (3,4-dichlorophenyl) -N, N-dimethylurea and / or O- (3,4-dichlorophenyl) -N-methoxy-N-methylurea (1: 1) - (1: 3) and 1: (1-3) :( 1-3).