CN106259401A - A kind of cornfield weeding composition and application thereof - Google Patents

Abstract

The present invention relates to technical field of pesticide, be specifically related to a kind of cornfield weeding composition and application thereof.It is one or more in the double acid of benzene azoles, cymolsulfamide, mefenpyrdiethyl, furilazole that described compositions comprises component effective active composition A benzene azoles fluorine oxadiazon, effective active composition B thifensulfuronmethyl and safener compound C, safener compound C.In described Herbicidal combinations the weight/mass percentage composition of A, B, C account for total amount for 1% 95%, preferably 10% 80%.Described Herbicidal combinations can effectively prevent and kill off corn field common weed, and especially ALS inhibitor being produced the Herba Digitariae of resistance, Herba Eleusines Indicae, Herba Setariae Viridis etc. has notable preventive effect.The Herbicidal combinations that the present invention provides can expand weed control spectrum, reduces usage amount, can slow down again weeds drug resistance and drug-fast generation and development, have important economic worth and social meaning.

Description

A kind of cornfield weeding composition and application thereof

Technical field

The invention belongs to pesticide field, be specifically related to one group of cornfield weeding composition comprising benzene azoles fluorine oxadiazon.

Background technology

Chemical weed control is the anti-a good appetite suddenly appearing in a serious disease of farmland weed means the most economic, effective.But the long-term ground of high dose continuously uses single One kind or the chemical herbicide of single model of action, easily cause the problems such as weeds drug resistance and resistance evolution.Herbicide chemical combination The rationally compounding or mixture of thing have expansion weeds spectrum, improve preventive effect, delay weeds drug resistance and drug-fast generation with The advantages such as development, are one of maximally efficient methods solving the problems referred to above.

Thifensulfuronmethyl is belonging to selective herbicide after inner sucting conduction type Seedling, is branched-chain amino acid synthetic inhibitor, can press down Valine processed, leucine, the biosynthesis of isoleucine, stop cell division, make sensitive crop stop growing.It is mainly used in preventing Except cereal crop Semen Tritici aestivi, Fructus Hordei Vulgaris, Herba bromi japonici, the broad leaved weed in Semen Maydis field, such as Amaranthus retroflexus, Herba Portulacae, descurainia sophia (l.) webb ex prantl, Herba Capsellae, pig Hair dish, Herba Galii Teneri, Herba veronicae, cattle Herba stellariae mediae etc. are invalid to field thistle, Herba seu Flos Convolvuli arvensis and dogstail etc..Maize at Seedling Stage stem and leaf spray pesticide, Easily causing maize leaf yellow, deformity symptom of chemical damage, severe patient causes the underproduction.

Benzene azoles fluorine oxadiazon is typical HPPD inhibitor.P _ Hydroxyphenyl pyruvic acid dual oxide enzyme (HPPD) is the acetylcoenzyme that continues A carboxylase (ACCase) inhibitor, acetolactate synthestase (ALS) inhibitor and proporphyrinogen oxidase (Protox) inhibitor The another class new herbicides found after Deng.The action character of HPPD inhibitor is the activity of weeding with wide spectrum, before bud and All can use after bud, weeds are dead after there is albefaction.Using HPPD inhibitor class herbicide, Weed Resistance risk is significantly less than ALS inhibitor, and there is not, with other mechanism of action such as conventional ALS inhibitor, the cross resistance that target resistance causes.

Herbicide-safener (Safener), also referred to as antidote (Antidote) or protective agent (Protectant), be to have The chemical substance of special performance.Herbicide-safener be do not affect herbicide to target weeds activity on the premise of, have selection Cover crop exempts from herbicide damage on ground, thus strengthens the crop tolerance to herbicide, increases the herbicide peace to crop Quan Xing.The states such as the U.S., Germany, Switzerland, Japan, Canada, Russia, Korea S and Hungary are to the research of herbicide-safener relatively Many, China starts late, and just starts this research at the end of the eighties.

Herbicide-safener, can be divided into dichloroacetyl amine, oxime ethers, carboxylic acid derivates class, sulfonic acid by compounds category Derivatives class, azoles, thiazole and other heterocyclic compound, ketone and derivative etc.；Naphthoic acid anhydride, two chloroethenes can be divided into by structure Amide-type, oxime ethers, heterocyclic, sulfonylureas (amine) class, plant growth regulator class, classes of herbicides and antibacterial class etc.；By making Can be divided into action principle by mode: conjunction type, breakdown type, antagonism type, offset-type etc..

Along with the extensive application of herbicide, herbicide damage problem constantly occurs, there is herbicide-safener and compels to be essential Ask.Herbicide-safener include amide-type, carbamates, phenoxy carboxylic acid, aryloxyphenoxypropanoates class, sulfonylurea, Sulfonamides, imidazolone type, cyclohexanedione class, isoxazole diones, sym-trinitrobenzene etc..The crop of protection mainly has jade Rice, Oryza sativa L., Sorghum vulgare Pers., Semen Maydis, Semen Maydis, rye (Secale cereale L.), Cotton Gossypii, Semen sojae atricolor etc..

The herbicide of corn field application at present mainly has the minority kind such as nicosulfuron, mesotrione.Both herbicides Using the most for many years on Semen Maydis, the resistance problem of nicosulfuron is started to highlight by weeds, and mesotrione activity is low, weed control spectrum Narrow, especially setaria weeds weak effect, production is needed badly safety height, broad weed-killing spectrum, can solve the problem that resistant weed problem Kind.

Summary of the invention

The present invention seeks to: provide one group of cornfield weeding composition comprising benzene azoles fluorine oxadiazon, it is achieved to corn field horse Effectively preventing and kill off of the common weed such as Tang, barnyard grass, green Herba Setariae Viridis, Amaranthus retroflexus, Herba Portulacae, Herba Acalyphae, Herba Abutili, Herba chenopodii, and ALS is pressed down Preparation produces preventing and kill off of the resistant weeds such as the Herba Digitariae of resistance, Herba Eleusines Indicae, green Herba Setariae Viridis, expands weed control spectrum, reduces the applications of pesticide Amount, raising are to problems such as crop safety, solution herbicide resistances.

For solving the above-mentioned problems in the prior art, the present invention is achieved through the following technical solutions:

A kind of cornfield weeding composition and application thereof, it is characterised in that: described Herbicidal combinations includes that weeding effective active becomes Dividing A benzene azoles fluorine oxadiazon, B thifensulfuronmethyl and C safener compound, described safener compound is that double benzene azoles is sour, to isopropyl One or more in base toluenesulfonamide, cyclopropyl-sulfonylamide, mefenpyrdiethyl, furilazole.

Wherein, the weight ratio of A:B is 1-100:1-100:, the weight ratio of preferably A:B is 1-40:1-10, more preferably A:B Weight ratio is 1-20:1-2, and in the range of the weight ratio limited, A obtains the technology of Synergistic with active component B mixture Effect, safener compound C plays the good improved safety to crop.

In described Herbicidal combinations, the weight/mass percentage composition of A, B, C accounts for the 1-95% of total amount, preferably 10-80%.Generally, originally The Herbicidal combinations of invention comprises the active component of 1-95 weight portion and the pesticide conven-tional adjuvants of 5-99 weight portion.

The conven-tional adjuvants of described Herbicidal combinations can be carrier, surfactant etc..

Described carrier represents a kind of organic or inorganic, naturally occurring or synthetic material.They contribute to using of active component, This carrier is usually inert and must be the most acceptable, and particularly processed plant is accepted.Carrier can be Solid, such as potter's clay, naturally occurring or synthetic silicate, silicon dioxide, resin, wax, solid fertilizer etc.；Or liquid, as water, Alcohols, ketone, petroleum distillate, aromatic hydrocarbons or wax hydrocarbon, chlorohydrocarbon, liquefied gas etc..

Described surfactant can include emulsifying agent, dispersant or wetting agent, and it can be ion-type or nonionic. The example that can be mentioned that is the salt of polyacrylic salt, lignosulfonates, phenolsulfonic acid or LOMAR PWA EINECS 246-676-2, oxirane and aliphatic Alcohol or with aliphatic acid or with aliphatic amine and the polymer of fortified phenol (particularly alkylphenol or aryl phenol), sulfosuccinic Hydrochlorate, taurine derivatives (particularly taurine alkane fat) and the phosphate ester of phenol of alcohol phosphate or multi-hydroxy ethyl, alkane Base sulfonate, alkylaryl sulfonates, alkyl sulfate, lauryl ether sulfate, aliphatic alcohol sulfate, and sulphation ten Six-, 17-and octadecanol and sulphated fatty alcohol glycol ether, in addition with naphthalene or LOMAR PWA EINECS 246-676-2 and phenol and formaldehyde Condensation substance, NONIN HS 240, ethoxylated isooctyl-phenol, octyl phenol or nonyl phenol, alkyl phenyl polyglycol ether, Tributyl phenyl polyglycol ether, three stearyl phenyl polyglycol ethers, alkyl aryl polyether alcohol, alcohol and fatty alcohol/oxidation second Alkene condensate, ethoxylated castor oil, polyoxyethylene alkyl ether, ethoxylation polyoxypropylene, lauryl alcohol polyglycol ether acetal, Sorbitol ester, lignin sulfite waste liquor, and protein, Denatured protein, polysaccharide (such as methylcellulose), hydrophobically modified shallow lake Powder, polyvinyl alcohol, polycarboxylate, poly-alkoxylation thing, polyvinylamine, polyvinylpyrrolidone and copolymer thereof.At least need A kind of surfactant exists, with the dispersion in water of the beneficially active component and be conducive to enabling them to correctly be applied to plant Thing.

Described Herbicidal combinations also can containing other components various, as protecting colloid, binding agent, thickening agent, thixotropic agent, Penetrating agent, stabilizer, chelating agen, dyestuff, coloring agent and polymer.

Described Herbicidal combinations through dilution or directly can be used before use by user.Its preparation can be added by common Prepared by work method, will add surfactant such as dispersant, steady after active substance mixes with liquid flux or solid carrier Determine one or more in agent, wetting agent, binding agent, defoamer etc..

The concrete preparation of described Herbicidal combinations is wettable powder, dispersible oil-suspending agent, suspending agent, suspension emulsion, breast Oil, water dispersible granules (dry suspending agent), aqueous emulsion, microemulsion.Above-mentioned formula Central Plains medicine, safener, solvent, emulsifying agent are added In mother solution modulation kettle, prepare homogeneous oil phase, the mix homogeneously such as deionized water, antifreeze is injected in product modulation kettle, through at a high speed Stirring, mix homogeneously makes the microemulsion product that the present composition is transparent or semitransparent.

In brief, the compositions of the present invention conventional use of solid and liquid can be added with in the formula of prior art Agent mixes.

Herbicidal combinations of the present invention can be applied on pending plant leaf blade by the method for spraying, is i.e. applied to Weeds, on the surface of the weed infestation being particularly harmful to plant growth or easily invasion impact.Discovery, the present invention is probed into through test Notable potentiation is there is between the effective active composition A and effective active composition B of described Herbicidal combinations.Synergistic effect shows For amount of application reduce, broader Weeds distribution spectrum, herbicide effect faster, more longlasting.

The beneficial effect that the present invention realizes:

(1) Herbicidal combinations of the present invention is environmental friendly corn field herbicidal, is prone to degraded in the environment, to working as stubble Semen Maydis and succession crop are the safest.

(2) (1) Herbicidal combinations of the present invention is environmental friendly corn field herbicidal, is prone to fall in the environment Solve, to when stubble Semen Maydis and succession crop the safest.

(3) compared with prior art, Herbicidal combinations of the present invention can prevent and kill off non-resistance grassy weed, can prevent again Except ALS inhibitor is produced the grassy weed such as the barnyard grass of resistance, Herba Setariae Viridis, be the management of corn field weed resistance have efficacious prescriptions Case.

Detailed description of the invention

Below in conjunction with specific embodiment, present invention is further elaborated, but the scope of the present invention can not be limited, The general change that patent of the present invention is done by persons skilled in the art, all falls equivalence at Patent right requirement of the present invention Book limited range.

A, embodiment

1.1) 55% benzene azoles fluorine oxadiazon thifensulfuronmethyl dispersibles oil-suspending agent

Formula consists of: 50% benzene azoles fluorine oxadiazon+5% thifensulfuronmethyl+15% pair benzene azoles acid+3.5% phenethyl phenol polyoxy Vinyl Ether phosphate ester triethanolamine salt+3% polyoxyethylene carboxylate+5.5% castor oil polyoxyethylene ether+2% thickening agent has Machine bentonite+methyl oleate is supplied.

Process equipment: mixing kettle, colloid mill, sand mill, cutter etc..

The course of processing: put into by all materials in mixing kettle, crosses colloid mill, enters sand mill three grades afterwards after stirring mixing Sand milling, finally shears in cutter and is uniformly finished product.

1.2) 35% benzene azoles fluorine oxadiazon thifensulfuronmethyl suspending agent

Formula consists of: 30% benzene azoles fluorine oxadiazon+5% thifensulfuronmethyl+7% cyclopropyl-sulfonylamide+5% sodium lignin sulfonate+3.5% Pull open powder+1% xanthan gum+5% glycerol+excess water to supply.

Process equipment: mixing kettle, cutter, colloid mill, sand mill etc..

The course of processing: benzene azoles fluorine oxadiazon, thifensulfuronmethyl, cyclopropyl-sulfonylamide and auxiliary agent etc. being put in mixing kettle, stirring is mixed Cross colloid mill after conjunction, enter sand mill three-level sanding afterwards, obtain finished product.

1.3) 55% benzene azoles fluorine oxadiazon thifensulfuronmethyl water dispersible granules

Formula consists of: 50% benzene azoles fluorine oxadiazon+5% thifensulfuronmethyl+10% mefenpyrdiethyl+5% naphthalenesulfonate+3% draws Open powder+1% disintegrating agent polyvinyl alcohol+filler kieselguhr to supply.

Process equipment: jet mill, coulter type mixer, basket comminutor, drying baker, screening machine etc..

The course of processing: above-mentioned material mix homogeneously is crossed comminution by gas stream, adds and mediates, and is dried after pelletize, and final sizing obtains To finished product.

B, the test of pesticide effectiveness

1) experimental condition

1.1), for examination target

Barnyard grass (Echinochloa crusgalli), green Herba Setariae Viridis (Setaria viridis), Herba chenopodii (Chenopodium Album), Herba seu Flos Convolvuli arvensis (Convolvulus arvensis) picks up from Tai'an Institute of Agricultural Sciences experimental plot.

Above-mentioned weeds use pot-culture method to cultivate, and with 180 х 140mm plastic nutritional alms bowls, are placed in enamel tray, built-in from agriculture Field is adopted to back through and is air-dried the topsoil (at 4/5) sieved, and the soil moisture initial stage all controls, 20%, to select full seed homogeneous Weed seed, with 25 DEG C of warm water soaking 6 hours, accelerating germination in 28 DEG C of biochemical cultivation cases (dark), the ruderal species that will have just showed money or valuables one carries unintentionally Son is uniformly placed in soil surface, then earthing 0.7cm.Chemicals treatment is placed on controlled sunlight indoor cultivation, is periodically warding off Porcelain dish adds a certain amount of water, keeps ground moistening.

1.2), condition of culture

Carry out in controlled heliogreenhouse, temperature 18～30 DEG C, natural lighting, relative humidity 57%～72%.

Soil types is loam, and the content of organic matter is 1.63%, pH=7.1, alkali-hydrolyzable nitrogen 84.3mg/kg, rapid available phosphorus 38.5mg/kg, available potassium 82.1mg/kg.

1.3), instrument and equipment

3WP-2000 type walking spray tower, Nanjing Agricultural Machinery Inst., Ministry of Agriculture.GA110 type ten thousand/electronic balance (German)；ZDR2000 intelligent data monitor (Hangzhou Ze great Instrument Ltd.)；SPX type Intelligent biochemistry incubator (Ning Bojiang South instrument plant).

2) EXPERIMENTAL DESIGN

2.1), reagent

2.1.1), test medicine

Required active component is commercially available former medicine.

Former medicine all uses dimethylformamide to make solvent, dilutes with content 0.1% emulsifying agent T-80 aqueous solution, existing with existing dilute Release.

2.2), test processes

2.2.1), dosage is arranged

When determining A and each component proportion of active component B or content, should weigh from the action character of two kinds of medicaments and virulence etc. thereof Amount, it is also contemplated that the main application target of this formula.This research on the basis of early stage prerun, if A, active component B are alone and Mixing consumption is shown in Table lattice respectively, designs 15 groups altogether.Using without medicament, water containing same solvent and emulsifying agent as blank.

2.2.2), test repeats

Often process and be repeated 4 times, the most often process 3 basins, every basin sowing weed seed 20, often process totally 60 strain.

2.3), processing mode

2.3.1), time and number of times are processed

Test shares medicine 1 time.Treat weeds 2 leaf 1 heart stage, thinning, keep weeds 15 strain in every basin, often process and retain 45 strains, then Continue cultivation to process to barnyard grass, green Herba Setariae Viridis 3 leaf 1 heart stage.

2.3.2), apparatus and administrated method are used

Cultured examination material is uniformly placed on the platform of area 0.5m2, sprays with 3WP-2000 type walking spray tower stem and leaf Mist, spouting liquid is based on 30 liters/mu.Atomisation pressure 0.3MPa.After whole liquid medicine jets are complete, close gas check valve, after 30 seconds, open spraying Pyller, takes out nutritive cube.Then open air valve, spray clear water 50ml, clean sparge pipe.

3) test method

Use pot-culture method.Weeds are cultivated and see 1.1, carry out with reference to " farm-chemical indoor determination test rule herbicide ".Use prescription Method is shown in 2.3.2, uses stem and leaf facture.

4), data survey and statistical analysis

4.1), investigation method

Use absolute number survey method, cut off survival weeds whole strain seedling with blade along soil surface, weigh weeds with analytical balance Fresh weight.For dead weeds, it is based on zero by fresh weight.

4.2), control time and number of times

Process investigation in latter 20 days, altogether investigation 1 time.

4.3), data statistic analysis

The theoretical fresh weight inhibition (E0=X+Y-X*Y/100) of each process hybrid combining is calculated, then with actual measurement by Gowing method Suppression ratio (E) compares, and evaluates the two mixed synergy type to weeds, when E-E0 value more than 10% be potentiation, It is antagonism less than-10%, is addition between-10%～10%.And according to actual preventive effect and herbicide feature, join The factors such as the balance of side determine optimum proportioning.

In formula X be A consumption be fresh weight inhibition during P；Y be active component B consumption be fresh weight inhibition during Q.

Statistical result see table:

The mixed actual preventive effect to weeds of table 1 and synergy effect (Gowing method)

The mixed actual preventive effect to weeds of table 2 and synergy effect (Gowing method)

By table 1, table 2 it can be seen that after benzene azoles fluorine oxadiazon and thifensulfuronmethyl are compounding, benzene azoles fluorine oxadiazon can be significantly improved to barnyard grass The preventive effect of Herba Setariae Viridis careless, green, has notable potentiation.Meanwhile, this Herbicidal combinations is to benzene azoles fluorine oxadiazon, thiophene sulphur The broad leaved weeds Herba chenopodii of grand alone anti-heterodyne, Herba seu Flos Convolvuli arvensis etc., potentiation is especially notable, and then expands weed control spectrum.

C, field, land for growing field crops preventive effect

1) preventive effect to corn field main weeds.

In the weeds 3-5 leaf phase, stem and leaf spray pesticide, to the water yield 30 liter/mu.30d after medicine, prevents and kill off the fresh weight of various weeds Effect.

Table 3 field demonstration preventive effect

As can be seen from the above table, the present composition is good to corn field weed broad weed-killing spectrum, preventive effect, and consumption is few, Ke Yiyou Effect solves benzene azoles fluorine oxadiazon, thifensulfuronmethyl is used alone the problem that weed control spectrum is narrow, preventive effect is low, dosage is high.Meanwhile, ratio is existing 4% nicosulfuron having dispersibles oil-suspending agent, 10% mesotrione oil dispersion processes preventive effect height, broad weed-killing spectrum.

3) corn safety is tested.

During Semen Maydis 3 leaf 1 heart, the weeds 3-5 leaf phase, hand sprayer, the amount of being watered 30 liter/mu, use stem and leaf spraying uniformly spray Mist, often processes and is repeated 4 times, and safety conditions is shown in Table 4.

Table 4 safety conditions

Poisoning classification: 1 grade: plant growth is normal, without any damage symptoms；

2 grades: the slight poisoning of crop, poisoning is less than 10%；

3 grades: the medium poisoning of crop, can recover later, not affect yield；

4 grades: chemical injury of crops is heavier, it is difficult to recover, cause the underproduction；

5 grades: chemical injury of crops is serious, it is impossible to recover, cause Severe Reduction or total crop failure.

As can be seen from the above table, the present composition is good to corn safety, and consumption is few, can effectively solve thifensulfuronmethyl It is used alone the problem to corn safety difference.

D, the preventive effect test of antagonism weeds

Test is selected and ALS inhibitor nicosulfuron is produced the green Herba Setariae Viridis (Setaria viridis) of resistance, Herba Digitariae (Digitaria sanguinalis), Herba Eleusines Indicae (Eleusine indica) seed, as subjects, above-mentioned seed in Within 2015, it is collected in proving ground, Tai'an, Shandong Province.

Test method:

Weed seed is unified accelerating germination, by the confession examination weed seed uniform broadcasting of pretreatment in soil surface.Dispenser is advanced in the ranks Seedling, every basin final singling to 30 strains, each process 4 basin examination material.Weeds carry out stem and leaf spraying treatment, and investigation weeds aerial parts is fresh Weight, calculates weeds fresh weight preventive effect (in table, fresh weight preventive effect is the meansigma methods repeated for 4 times), statistical test situation after testing 30 days.

Table 5 resistant weed preventing iron test result

As can be seen from Table 5, Herbicidal combinations of the present invention can effectively prevent and kill off corn field resistant weed Herba Digitariae, Herba Eleusines Indicae, green Color Herba Setariae Viridis.

Through lot of experiments with exploration it follows that A and active component B, safener compound C are mixed, for corn field Seedling rear defence removes grassy weed, has potentiation between effective active composition, to grassy weeds such as barnyard grass, green Herba Setariae Viridis And the broad leaved weeds such as Herba chenopodii, Herba Abutili, Herba seu Flos Convolvuli arvensis to prevent and kill off potentiation notable.The cornfield weeding composition that the present invention provides, reduces The dosage that benzene azoles fluorine oxadiazon, thifensulfuronmethyl are alone, improves corn safety, expands weed control spectrum, and reduces and be applied to This, especially efficient to ALS inhibitor resistant weed, there is good application prospect.

Claims (8)

1. a cornfield weeding composition, it is characterised in that: described Herbicidal combinations effective ingredient comprises A benzene azoles fluorine oxadiazon, B Thifensulfuronmethyl.

Herbicidal combinations the most according to claim 1, it is characterised in that: effective active composition A: effective active composition B matter Amount ratio is 1-100:1-100.

Herbicidal combinations the most according to claim 1, it is characterised in that: effective active composition A: effective active composition B's Mass ratio is 1-40:1-10.

Herbicidal combinations the most according to claim 1, it is characterised in that: effective active composition A: effective active composition B's Mass ratio is 1-20:1-2.

Herbicidal combinations the most according to claim 1, it is characterised in that: possibly together with safener C, described safener is selected from being In double benzene azoles acid, cymolsulfamide, cyclopropyl-sulfonylamide, mefenpyrdiethyl, furilazole one or more.

Herbicidal combinations the most according to claim 1, it is characterised in that: the matter of A, B, C in described Synergistic herbicide compositions Amount percentage composition accounts for the 1-95%, preferably 10-80% of total amount.

Herbicidal combinations the most according to claim 1, it is characterised in that: the concrete preparation of described Herbicidal combinations is breast Oil, suspending agent, microemulsion, suspension emulsion, aqueous emulsion, dispersible oil-suspending agent, wettable powder or water dispersible granules.

8. Synergistic herbicide compositions as described in claim 1-7 any one, it is characterised in that: described compositions is preventing and kill off Semen Maydis Field common weed such as Herba Digitariae, barnyard grass, green Herba Setariae Viridis, Amaranthus retroflexus, Herba Portulacae, Herba Acalyphae, Herba Abutili, Herba chenopodii effect notable, to ALS Inhibitor produces the weeds such as Herba Digitariae, Herba Eleusines Indicae of resistance, Herba Setariae Viridis has notable preventive effect, to corn safety.