CN100539839C - A kind of wheat field herbicide composition that contains tralkoxydim - Google Patents

Abstract

The invention discloses a kind of Herbicidal combinations, specifically a kind of re-compounded binary herbicide that is used for effectively preventing and kill off grassy weed and broad leaved weed between wheat paddock.The active component of said composition is a compound (I) and compound (II), and compound (I) is a tralkoxydim, in compound (II), R be H ,-C (O)-C ₃-C ₇Alkyl, Na or K, X are Br or I, and compound (I) is 1: 0.5～6 with the weight ratio of compound (II).Activity when the preventive effect of said composition is better than herbicide applied alone, and obtain unforeseeable synergistic effect after the combination, guaranteed the productive rate of crops simultaneously, easy to use, reduce the dispenser cost, enlarge the control of weeds spectrum, reduce spraying times, reduced labour intensity.

Description

A kind of wheat field herbicide composition that contains tralkoxydim

Technical field

The present invention relates to a kind of the have Herbicidal combinations that improves performance, specifically a kind of weed killer herbicide that is used for effectively preventing and kill off cornfield gramineae weed and broad leaved weed.

Background technology

Tralkoxydim belongs to the cyclohexenone analog weed killer herbicide.Be mainly used in wheat and barley field bud rear defence and remove amur foxtail, wind grass, oat, auspicious native perennial ryegrass, green foxtail, after leaf absorbs, transfer to growing point, suppress new growth at this at phloem.Absorbed by plant rapidly behind the foliage application and shift.Weeds elder generation chlorosis, back variable color is withered, and withered fully in general 3～4 weeks, the optimum period for applying fertilizer is wide, almost can thoroughly prevent and kill off the final wild oat in the past that tillers, and can be extended down to the shooting stage inhibition period.Even under 2 times of maximum recommended dosage, tralkoxydim comprises durum wheat to also safety of wheat, barley.Tralkoxydim has certain limitation in actual applications, can only singlely prevent and kill off cornfield gramineae weed, and broad leaved weed is not had remarkable activity.The weed killer herbicide of the benzyl cyanogen type of Brominal or ioxynil or their derivative is prevented and treated broadleaf weed individually or in the mixture mode widely after cereal field or other economic crops Tanakas are used for bud, usually, these weed killer herbicides abbreviate " HFH " as.In such weed killer herbicide, what especially will mention is: " Brominal " or claim 3,5-two bromo-4-hydroxyl benzyl cyanogen, Brominal monooctyl ester or Brominal heptyl ester, and the sylvite of Brominal or sodium salt; " ioxynil " or claim 3,5-two iodo-4-hydroxyl benzyl cyanogen, ioxynil monooctyl ester or ioxynil heptyl ester, and the sylvite of ioxynil or sodium salt.HFH class weed killer herbicide mainly uses behind bud in early days, is that a kind of selectivity cauline leaf is handled the contact killing type weed killer herbicide.Mainly absorb,, make necrosis rapidly by suppressing photosynthesis by blade.This compounds is generally used for preventing and kill off broad leaved weed in wheatland, the corn field, and grassy weed is not had remarkable activity.

Summary of the invention

Have now found that the weed killer herbicide that tralkoxydim and some is specific mixes, can obtain high-performance Synergistic herbicide compositions selectively, crop Tanakas' such as wheat, barley weeds are had good activity.Purpose of the present invention is just at above-mentioned weed killer herbicide in use superiority and deficiency separately, provide a kind of Herbicidal combinations, in the hope of a kind of one-time weeding composition that has efficient, low toxicity, low-residual, low cost and grass family and broad leaved weed are all had fine preventive effect of further invention with synergistic effect.In addition, can also have very active influence to the aspects such as poisoning of crop in the careless extremely spectrum of expansion, raising herbicidal effect, reduction.

Particularly, the invention provides a kind of Herbicidal combinations, active component is compound (I) and compound (II), and compound (I) is a tralkoxydim, in compound (II), R be H ,-C (O)-C ₃-C ₇Alkyl, Na or K, X are Br or I.

In above-mentioned Herbicidal combinations, also contain agricultural and go up the conventional auxiliary agent of acceptable agricultural chemicals.

In above-mentioned Herbicidal combinations, compound (I) is 1: 0.5～6 with the weight ratio of compound (II), preferred 1: 0.7～5.

Usually, Herbicidal combinations of the present invention comprises the active component of 10～90 weight % and the conventional auxiliary agent of 12～88 weight %.

The conventional auxiliary agent of the present composition can be carrier, surfactant, adhesive and dispersant etc.

A kind of organic or inorganic, natural or synthetic material represented in term herein " carrier ".They help using of active component, this carrier generally be inertia and must to be that agricultural goes up acceptable, particularly processed plant is accepted.Carrier can be a solid, as potter's clay, natural or synthetic silicate, silica, resin, wax, solid fertilizer etc.; Perhaps liquid is as water, alcohols, ketone, petroleum cuts, aromatic hydrocarbons or wax hydrocarbon, chlorohydrocarbon, liquefied gas etc.

Surfactant can comprise emulsifier, dispersant or wetting agent, and it can be ionic or nonionic.The example that can mention be polyacrylic salt, lignosulfonates, phenolsulfonic acid or naphthalene sulfonic acids salt, oxirane and fatty alcohol or with aliphatic acid or with the polymer of aliphatic amine and fortified phenol (particularly alkylphenol or aryl phenol); sulfosuccinate, the phosphate of the phenol of taurine derivatives (particularly taurine alkane ester) and alcohol phosphate or multi-hydroxy ethylization.At least need a kind of surfactant to exist, with help active component in water dispersion and help making them can correctly be applied to plant.

Above-mentioned composition also can contain various other components, as protecting colloid, adhesive, thickener, thixotropic agent, bleeding agent, stabilizing agent, chelating agent, dyestuff, colouring agent and polymer.

In brief, composition of the present invention can mix with conventional solid that uses in the prescription of prior art and liquid additive.

Composition of the present invention can be solid or liquid form, can be missible oil, water dispersible granules, wetting powder, granule and suspending agent etc.

As the solid form composition, having of can mentioning is following several: (content of its active component is generally than higher for water dispersible granules, usually between 50%-90%), normally prepared by the agglomeration of wettable powder type composition in suitable granular system, make this formulation.

Wetting powder is general to be prepared with such method, promptly so that its active component that contains 20-95% be as the criterion, except that solid carrier, they generally contain the wetting agent of 0-7%, the dispersant of 3-10% in case of necessity, contains one or more other the additive of 0-10% again.As dyestuff, colouring agent, bleeding agent, adhesive or anti-caking agent etc.

Granule can prepare with following method, will contain the active component of 5-60 weight portion, the stabilizing agent of 0.1-45 weight portion, and the carrier mixing granulation of 30-90 weight portion.There is no particular limitation to be suitable for prilling process of the present invention, it can be the conventional method of selecting to make pesticide granules, as wet granulation, dry granulation, stirring granulation, extruding granulation etc., especially, utilize the extruding granulation can make granule easy and at an easy rate.

Missible oil can prepare with following method, and missible oil is made up of following material: solvent, the emulsifier of the mixture of active principles of 4-55 weight portion and 96-45 weight portion.

Suspending agent can prepare by following method: promptly be as the criterion not form sedimental stable fluid, they generally contain the active component of 4-85 weight portion, 0.5-45 the surfactant of weight portion, the additive that the 0-10 weight portion is suitable such as dyestuff, colouring agent, foam reducing composition, corrosion inhibitor, stabilizing agent and bleeding agent and adhesive etc., carrier can be water or organic liquid, active component indissoluble or water fast can be dissolved in some solid organic matter or mineral salt in the liquid so that help sediments to form or as the antifreezing agent of water.

Composition of the present invention, promptly comprising active compound component (I) and Herbicidal combinations (II) can be by spray application in pending plant surface, promptly be applied to by weeds particularly harmful weed infestation or easy the invasion on the surface that influences to plant growth.The common active ingredient amount of application of the present invention is 50-1200 gram/hectare (a.i.g/ha), preferred 60-1100 gram/hectare (a.i.g/ha).

When compound (I) and compound (II) when using jointly, obtained unforeseeable synergistic effect.The specific activity of above-mentioned Herbicidal combinations is used the activity expection summation of single weed killer herbicide, and single weed killer herbicide (I) and independent activity (II) are more remarkable.Synergistic effect shows as that amount of application reduces, wideer weeds control spectrum, the faster onset of herbicide effect, more lasting control efficiency, by once or minority use several times just can control better and be harmful to crop and widened possible dispenser interval.Needed in these characteristic weeds control practice processes.With regard to described characteristic,

Herbicidal combinations of the present invention also has following advantage:

1, Herbicidal combinations of the present invention has good control efficiency for Tanakas' such as wheat, barley weeds.Whole preventive effect is much higher than single agent under Isodose.

2, herbicidal composition of the present invention is the herbicidal composition with synergistic function, some malignant weed of wheatland had excellent control effect, as clearvers, stroke seat?, descurainia sophia (l.) webb ex prantl and annual bluegrass etc. these conventional weed killer herbicide is produced weeds of resistance, by using herbicidal composition of the present invention, has effective preventive effect.

3, the herbicidal composition dispenser lasting period of the present invention long, generally all can use in wheat back 5-7 leaf to shooting stage of emerging, to wheat growth safety, after the dispenser 40-60 days, the fresh weight preventive effect on average still reached about 78%, the strain preventive effect is between 76-83%.Middle and lower reach of Yangtze River Mai Qu, the generation of weeds in the whole wheat growth phase just can be effectively controlled in wheat whole growth phase dispenser 1-2 time.

4, herbicidal composition low toxicity of the present invention, residence time weak point in crop and soil, no accumulation toxicity.

5, herbicidal composition cost of the present invention is low, easy to use, and it applies huge economic benefit and social benefit.

Embodiment

The following example and unrestricted the present invention, and be used for just illustrating how the present invention realizes.For some weeds, these embodiment demonstrate significant especially validity.

A, example of formulations

A), water dispersible granules

In compound (II), R is Na, when X is Br, the mixture of active principles of 75 weight portions (tralkoxydims of the Brominal sodium salt of 41 weight portions+34 weight portions), 3 weight account polyethylene alcohol, the Sodium Laurylsulfate of 4 weight portions, the kaolin of 8 weight portion wooden calcium sulfonates and 10 weight portions.

After the mentioned component mixing, in bolt type dish formula flour mill, wear into fine powder, powder is made it granulation by the water that sprays as granulation liquid in fluid bed.

B), wetting powder

In compound (II), R is K, when X is Br, the mixture of active principles of 40 weight portions (tralkoxydims of the Brominal sylvite of 13 weight portions+27 weight portions), the glycerine of 6 weight portion alkyl naphthalene formaldehyde condensate sulfonates, 8.3 weight portion neopelexes, 0.8 weight portion, 44.9 the white carbon black of weight portion is mixed, through ultramicro grinding, make powder reach fineness requirement, and use double helical form mixer and colter formula mixer through repeatedly mixing, product is mixed, thereby make this high-load formulation.

C), granule

In compound (II); R is H; when X is Br; the mixture of active principles (tralkoxydims of the Brominal of 12 weight portions+17 weight portions) of 29 weight portions, the polyvinyl alcohol of 3.5 weight portions, the atoleine of 7 weight portions, the calcium stearate of 4 weight portions and the clay mixing of 56.5 weight portions can be obtained 100 parts of mixture of powders, and add an amount of water, mix with small-sized kneader; carry out granulation again; dry with the whole grain of pelletizing machine back, sieve, can obtain said preparation.

D), missible oil

In compound (II), R is-C (O)-C ₇H ₁₅When X is Br, can be with the mixture of active principles (tralkoxydims of the bromoxynil octanoate of 31 weight portions+11 weight portions) of 42 weight portions, the dimethylbenzene of 39 weight portions as the oxygen phenol in the ethylating ninth of the ten Heavenly Stems of solvent and 19 weight portions as emulsifier, after in reactor, stirring repeatedly, can make this formulation.

E), suspending agent

In compound (II), R is H, when X is I, mixture of active principles (tralkoxydims of the Brominal of 12 weight portions+18 weight portions) with 30 weight portions, the carboxymethyl cellulose of 5 weight portions, the neopelex of 10 weight portions, the water of the propane diols of 3 weight portions and 52 weight portions makes this mixture by master operations such as mixing, stirring, sand millings.

B, Application Example

1), composition of the present invention is prevented and kill off result of the test (table 1) behind 48 days of weeds such as wheat paddock wartwort:

Test method: with weed seed seed soaking after show money or valuables one carries unintentionally, under 27-28 ℃, husky training, when treating height of seedling 7-10 centimetre, weeds overground part fresh weight is measured in processings of spraying, (in the table fresh weight be 4 times repeat mean values) calculating weeds fresh weight inhibiting rate.

The weed killer herbicide of the present invention of table 1, different proportioning and formulation is to the preventive effect of wheat paddock weeds

2), the demonstration test of present composition control wheat weeds

Promoted exemplary test in 21 Mai Qu test sites, 5 areas such as Jiangsu Da Feng, Hai'an, brass hill, Wujin, the six directions in 2005.

Test method: in the time of 5-10 centimetre of wheat period of seedling establishment, weeds plant height, carry out the cauline leaf spraying and handle, the every mu of present composition 22 grams per liters of using active ingredient, to 35 kilograms in water (concrete test medicine sees Table 2), 50 square metres of sub-district areas, every processing repeats 4 times, and wheat breed is for raising wheat No. 18.Each is handled poisoning (contrast medicament 22.5% Brominal missible oil, 22.5 gram/mus (ai), 80% tralkoxydim water dispersant, 23 gram/mus (ai) is not all taken place in the process of the test.42 days investigation preventive effects (table 2) after dispenser.

The field demonstration test of table 2. present composition

Annotate: weed community type: Da Feng (amur foxtail+shepherd's purse+annual bluegrass+Veronica+chickweed+green foxtail+adhesive hair grasswort+clearvers) in each demonstration pilot project, Hai'an (descurainia sophia (l.) webb ex prantl+amur foxtail+shepherd's purse+conical silene herb+wild oat+chickweed+clearvers), brass hill (hard grass+clearvers+Veronica+bromegrass+descurainia sophia (l.) webb ex prantl+shepherd's purse+wild oat), Wujin (Japanese amur foxtail+Buddhist seat+descurainia sophia (l.) webb ex prantl+shepherd's purse+deceive grass+wild oat+clearvers), the six directions (wild oat+common vetch+clearvers+wartwort+Buddhist seat+annual bluegrass+amur foxtail).

Claims (7)

1. Herbicidal combinations, active component is compound (I) and compound (II), compound (I) is a tralkoxydim, in compound (II), R be H ,-C (O)-C ₃-C ₇Alkyl, Na or K, X are I, and compound (I) is 1: 0.5～6 with the weight ratio of compound (II).

2. according to the Herbicidal combinations of claim 1, wherein, the R in the compound (II) is Na.

3. according to the Herbicidal combinations of claim 1, wherein, the R in the compound (II) is-C (O)-C ₆H ₁₃

4. according to the Herbicidal combinations of claim 1, compound (I) is 1: 0.7～5 with the weight ratio of compound (II).

5. according to arbitrary Herbicidal combinations in the claim 1-4 item, comprise the active component of 10～90 weight %, surplus is the conventional auxiliary agent of agricultural chemicals.

6. according to the described Herbicidal combinations of claim 1, wherein, the formulation of described composition is suspending agent, missible oil, wetting powder, water dispersible granules or granule.

7. the described Herbicidal combinations of claim 1 is prevented and kill off the purposes of weeds in wheat, the barley field.