CN1090452C - Herbicidal composition - Google Patents

Abstract

The invention provides a herbicidal composition capable of selectively controlling weeds in a plowland, especially a wide range of weeds in soybean fields and manifesting synergistic effects by mixing a specific imide compound with a specified imidazolinone compound or its agriculture chemical acceptable salt for use.

Description

Herbicidal combinations

The present invention relates to a kind of Herbicidal combinations.More specifically, the present invention relates to be used for optionally preventing and treating the Herbicidal combinations of the various injurious weeds of nonirrigated farmland soybean Tanaka.

There are many weed killer herbicides on market, to sell now, and in fact are used for farmland and horticultural crop.Many kinds of injurious weeds should be prevented and treated, but the sprouting of these weeds can continue for a long time.Owing to this reason, require some weed killer herbicides to have higher herbicidal effect and broad control of weeds spectrum, and to crop safety sufficiently.

The inventor is devoted to research and develop above-mentioned good weed killer herbicide.The result, they find to be used in combination following specific herbicides compounds can be in the nonirrigated farmland, nonirrigated farmland soybean field particularly, optionally prevent and treat various injurious weeds, and they further find, compare with every kind of herbicides compounds of independent application, the herbicidal effect of the herbicides compounds that is used in combination is that synergy improves, and has finished the present invention thus.

Thus, the invention provides a kind of herbicidal composition, it comprises as active component, 7-fluoro-6-[3,4,5,6-tetrahydrochysene phthaloyl imino]-4-(2-propynyl)-1,4-benzoxazine-3 (2H)-ketone (hereinafter being called compd A), that is, and the imide compound of following formula:

(±)-2-[4,5-dihydro-4-methyl-4-(1-Methylethyl)-5-oxo-1H-imidazoles-2-yl]-5-ethyl-3-picolinic acid (hereinafter being referred to as compd B), i.e. the imidazolidinone compound of following formula, or acceptable salt on its agrochemistry:

The present invention also provides the method for control injurious weed, and it comprises that the above-mentioned composition with herbicidally effective amount is administered to the region that the injurious weed growth maybe will be grown.

Herbicidal combinations of the present invention is characterised in that it contains as the compd A of active component and the composition of B.These compounds are compounds well known in the prior art, compd A is disclosed in United States Patent (USP) U.S.4,640, in No. 707, and compd B generally is called " Imazethapyr ", and be described in, agrochemistry handbook (Farm Chemicals Handbook) for example is in 1994 (being published by Meister Publishing Co.) C300 page or leaf.

As above-mentioned, compd B can its agrochemistry on acceptable salt form use.The example of acceptable salt is an alkali metal salt on its agrochemistry, alkali salt, amine salt such as isopropyl amine salt, and ammonium salt.

Herbicidal combinations of the present invention can be in dry land, and particularly nonirrigated farmland soybean field is used for optionally preventing and treating various injurious weeds, and there are not debatable phytotoxicity in crop such as preceding crop soybean (Glycine max) and succession crop corn (Zea mays).This composition also can be used for new cultivation method, as no-tillage cultivation.

The example of the injurious weed that can be prevented and treated in soybean field, nonirrigated farmland is broadleaf weed such as corn-bind (Polygonum convolvulus), Pale persicaria (Polygonum lapathifolium), Binzhou knotweed (Polygonum pensylvanicum), kitchen garden (Portulaca oleracea), knotweed (Chenopodium album), Amaranthus retroflexus (Amaranthus retroflexus), sinapsis alba (Sinapis arvensis), big fruit sesbania (Sesbania exaltata), blunt leaf Cassia tora (Cassia obtusifolia),  fiber crops (Abutilon theophrasti), thorn bur (Sida spinosa), pharbitis nilChoisy (Ipomoea hederacea), Pharbitis purpurea (Ipomoea purpurea), pharbitis nilChoisy mutation (Ipomoea hederaceavar.integriuscula), datura (Datura stramonium), black nightshade (Solanumnigrum), Binzhou Siberian cocklebur (Xanthium pensylvanicum), sunflower (Helianthusannuus), field bindweed (Convolvulus arvensis), wartwort (Euphorbiahelioscopia), light fruit terrible leaf grass (Bidens frondosa) and american ragweed (Ambrosiaartemisiifolia); With monocotyledon weed such as barnyard grass (Echinochloa crus-galli), green foxtail (Setaria viridis), faber bristlegrass herb (Setaria faberi), setaria glauca (Setaria glauca), lady's-grass (Digitaria ciliaris), eleusine indica (Eleusine indica), Ah thorn Bogao beam (Sorghum halepense), quackgrass (Agropyron repens) and two look chinese sorghums (Sorghum bicolor).

In Herbicidal combinations of the present invention, the mixing ratio of compd A and compd B or its salt can change in very wide scope, but common scope is by weight 1: 0.1 to 20, preferably by weight 1: 0.1 to 10, and more preferably by weight 1: 0.25 to 10.

When using, Herbicidal combinations of the present invention common and solid or liquid support or mixing diluents, and if desired, mix with surfactant or other auxiliary agent, be mixed with several formulations such as missible oil then, wetting powder, suspending agent or granule.

The total amount of the active component that in preparation, contains usually by weight in 0.5% to 90% scope, preferably by weight 1% to 80%.

The carrier of solid form or the example of thinner are fine powder or the particle such as the kaolin of clay material, diatomite, synthetic hydrated silica, Fubasami clay, bentonite and land plaster; Talcum and other inorganic mineral such as sericite mica, silica flour, sofril, active carbon and calcium carbonate; With chemical fertilizer such as ammonium sulfate, ammonium phosphate, ammonium nitrate, ammonium chloride and urea.The carrier of liquid form or the example of thinner are water, alcohols such as methyl alcohol and ethanol; Ketone such as acetone, methyl ethyl ketone and cyclohexanone; Arene such as toluene, dimethylbenzene, ethylo benzene and methyl naphthalene; Non-aromatic hydrocarbon class such as hexane, cyclohexane and kerosene; Ester class such as ethyl acetate and butyl acetate; Nitrile such as acetonitrile and isobutyronitrile; Ethers such as diox and Di Iso Propyl Ether; Amide-type such as dimethyl formamide and dimethylacetylamide; With halogenated hydrocarbon such as dichloroethane and trichloro-ethylene.

The example of surfactant is an alkyl sulfate, alkylsulfonate, alkylaryl sulfonates, alkyl aryl ether and its polyoxyethylene deriv, polyglycol ether, polyol ester and sugar alcohol derivant.

The example of auxiliary agent is the casein that can be used as sticker or dispersant, gelatin, polysaccharose such as starch, gum Arabic, cellulose derivatives and alginic acid; Lignin derivative, bentonite, synthetic water insoluble polymer may such as polyvinyl alcohol, polyvinylpyrrolidone and polyacrylic acid; With the PAP that can be used as stabilizing agent (p isopropylbenzoic acid ester), BHT (2, the 6-tert-butyl group-4-methylphenol), BHA (2-/3-tert-butyl group-4-metoxyphenol), vegetable oil, mineral oil, fatty acid and fatty acid ester.

Herbicidal combinations of the present invention as above-mentioned preparation can for example behind the dilute with water, be used for plant or dryland soil like this without any dilution or after dilution.Usually soil treatment is by preparation is sprayed cloth on soil surface, and if desired, the preparation and the earth mixture on surface is carried out.

Herbicidal combinations of the present invention can be used to mix to improve its herbicidal effect with other weed killer herbicide.And it can also use with insecticide, fungicide, plant growth regulator, fertilizer, soil conditioner etc.

Common Herbicidal combinations of the present invention is 20 to 400g with the total amount of per hectare active component; preferred 50 to 300g usage amount is used, although usage amount can be according to type, time of application, the application process of the mixing ratio of active component, main weather conditions, preparation, use the place, the injurious weed and the protected crop that are prevented and treated change.Using missible oil, under the situation of wetting powder or suspending agent, said preparation uses after with about per hectare 100 to 1000 premium on currency dilution specified rate usually.Under the situation of using granule, said preparation is used without any need for dilution usually.

Following example of formulations and drug effect embodiment will the present invention is further described, and they do not constitute limitation of the scope of the invention.In these preparations and drug effect embodiment, all umbers all by weight.

Example of formulations 1

With 5 parts of compd As, 20 parts of compd Bs, 3 parts of calcium lignosulfonates, 2 parts of lauryl sodium sulfate and 70 parts of synthetic hydrated silicon oxides fully grind and mix to obtain wetting powder.

Example of formulations 2

With 2 parts of compd As, 20 parts of compd Bs, 3 parts of Tween-81s, 3 parts of CMC and 72 parts of water mix, and grinding up to particle mean size then is 5 μ m or littler, to obtain suspending agent.

Example of formulations 3

With 1 part of compd A, 4 parts of compd Bs, 1 part of synthetic hydrated silicon oxide, 2 parts of calcium lignosulfonates, 30 parts of bentonites and 62 parts of kaolin fully grind and mix, and add the abundant kneading mixture of entry, and granulation is also dry to obtain granule.

Drug effect embodiment

Spread upland field soil in the experiment field of outdoor 40cm * 35cm area and sow lady's-grass (Digitaria ciliaris), then cultivate.When plant grew to 5 leaf phases, when approximately 10cm is high, spread upland field soil in other experimental field of the same area and sow field bindweed (Convolvulus arvensis), soybean (Glycine max) and corn (Zeamays), then cover the thick soil of 2cm, to be mixed with the specified rate Herbicidal combinations of wetting powder according to example of formulations 1,, and dilution be sprayed cloth equably at plant or soil surface with the volume ratio dilute with water of 10 liters of per hectares.The herbicidal effect of leaf surface treatment lady's-grass is measured in the 5th day or the 25th day after processing.After processing the 43rd day, measure soil treatment to the herbicidal effect of field bindweed with to the phytotoxicity of soybean and corn.The results are shown in following table.

Be not subjected to dysgenic test plant acrial part weight in wet base to determine activity of weeding when checking, and it uses growth inhibition ratio (%) expression of calculating by following formula by being determined at:

Table

For the examination composition	The usage amount of active component (g/ha)	Mixing ratio	Leaf surface treatment		Soil treatment
								Activity of weeding		Activity of weeding	Phytotoxicity
			Lady's-grass (the 5th day)	Lady's-grass (the 25th day)	Field bindweed	Soybean	Corn
								The ammonium salt of compd A+compd B	100 + 100	1∶1	100	95	100	Do not have	Do not have
100 + 200	1∶2	100	100	100	Do not have	Do not have
							The ammonium salt of compd A compd B		100 100 200	- - -	70 60 70	20 60 100	30 0 15	Do not have	Do not have

Can see that from last table Herbicidal combinations of the present invention is in dry crop such as soybean and corn field, it is very useful optionally to prevent and treat various injurious weeds aspect.

Claims (4)

1. Herbicidal combinations, it comprises as active component, the imide compound of a kind of formula [A]:

With acceptable salt on the imidazolidinone compound of a kind of formula [B] or its agrochemistry, Wherein, the mixing ratio of inferior amide compound and imidazolidinone compound is that by weight 1: 0.1 is to 20.

2. be used to prevent and treat the purposes of nonirrigated farmland soybean Tanaka injurious weed according to the Herbicidal combinations of claim 1.

3. prevent and treat the method for injurious weed, it comprises the composition according to claim 1 from herbicidally effective amount to the area that the injurious weed growth maybe will be grown that use.

4. according to the method for claim 3, using wherein is carried out at soybean field, nonirrigated farmland.