CN104304297B - A kind of Herbicidal combinations of Han You oxazole acyl grass amine - Google Patents

Abstract

The present invention relates to a kind of herbicidal composition, relate in particular to a kind of taking promazine Sulfometuron Methyl He oxazole acyl grass amine as active component for preventing and kill off the herbicidal composition of paddy field weed, active component promazine Sulfometuron Methyl in said composition is with the weight ratio of oxazole acyl grass amine is 1:40～32:5, and the percentage composition of active component in composition is 1～80%. Component of the present invention is reasonable, and herbicidal effect is good, and expand herbicide spectrum, reduced spraying times, reduced cost accounting, delayed the generation of herbicide resistance, to rice safety, be a kind of desirable herbicide.

Description

A kind of Herbicidal combinations of Han You oxazole acyl grass amine

[technical field]

The invention belongs to technical field of pesticide, be specifically related to a kind of taking promazine Sulfometuron Methyl with oxazole acyl grass amine is the weeding of active componentAgent composition, for preventing and kill off paddy field weed.

[background technology]

China is large agricultural country, and paddy rice is one of crops of China's cultivated area maximum, in order to ensure high yield, the stable yields of paddy rice,Country has carried out the input of each side, especially applying of science and technology. Paddy rice often suffers the danger of various weeds in growth periodEvil, these weeds have very strong vitality, with rice seedling contention nutrition, moisture, sunlight, growing space etc., serious shadowGrowing of Xiangshui County's rice sprouts, causes rice yield to decline and even has no harvest. Along with the development of agricultural cience and farming techniques, chemical weed controlApplying of agent becomes saving of labor, saves time, one of the strong well stimulation of cost-saving. The direction of pesticide developing was in recent yearsEmbody efficient, low toxicity, low-residual and pollution-free, be embodied in pursuit " three height ": safe, biologically active is high,Selective high. Therefore, need to continue to improve the performance of current Pesticidal products, to reach efficient, low toxicity, free of contamination requirement.Select suitable agricultural chemicals to carry out composite current first-selection and a kind of effectively approach that just become, by adjusting the proportioning of different compoundsMake the agricultural chemicals of performance complement bring into play best drug effect.

Promazine Sulfometuron Methyl is the selective broad-spectrum herbicide of pyrimidine radicals sulfonylurea by the exploitation of SUMITOMO CHEMICAL chemistry, and other sulfonylureasThe mechanism of action of class herbicide is identical, and promazine Sulfometuron Methyl is also acetolactate synthestase (ALS) inhibitor, but its antagonism sulfonylureasThe weeds of class herbicide have good preventive effect, and the effect of tool residual effect can be prevented and kill off on firefly Lin in rice terrace, Monochoria vaginalis, footpath between fields effectivelyMultiple broad-leaved and the sedge weeds such as dish, mexicana, waterwort, Herba Cyperi Glomerati, false loosestrife, cyperus iria, but to except barnyard grass withOther outer grassy weeds are invalid.

The aryloxyphenoxypropanoates class herbicide of Chemical Engineering Technology research institute of oxazole acyl Cao Anshiyou Korea S exploitation, belongs to acetyl coenzyme A carboxylicChange enzyme (ACCase) inhibitor, after active ingredient is absorbed by grass cutting blade, can conduct to rapidly whole plant, be accumulated in plant and divideRaw tissue, the activity of inhibition acetyl-CoA carboxylase, causes aliphatic acid biosynthesis block to cause blade yellow, finally kills weeds,The main grassy weed that it can effectively prevent and kill off rice terrace, low toxicity, environmentally safe, have miscibilty widely, and be expected to forOther crops and Kill weeds be very promising herbicide, but this herbicide are invalid to broad-leaved and sedge weed.

Existing a lot of bibliographical informations are crossed the herbicidal composition that contains promazine Sulfometuron Methyl Huo oxazole acyl grass amine, for example patentCN103271066A discloses promazine Sulfometuron Methyl and pyrazosulfuron is composite for agent for removing grass in paddy field, two active component mechanism of action phasesWith, composition is poor to the preventive effect of the main grassy weed in rice field; Patent CN101965838A discloses oxazole acyl grass amine and cyanogenThe herbicidal composition of fluorine grass ester mixture, the two active component mechanisms of action are identical, and herbicide spectrum is similar, and composition is only assorted to grass familyGrass has special efficacy, invalid to broad-leaved and sedge weed; Patent CN102724876A has described and has comprised fluroxypyr with oxazole acyl grass amineSynergistic herbicidal compositions, in order to control unwanted vegetation in rice terrace, should be all right containing compositions of two kinds of active componentsFurther plant to control the less desirable of wider scope with other herbicides such as propyrisulfuron (promazine Sulfometuron Methyl) are co-administeredQuilt, but not yet have document to disclose promazine Sulfometuron Methyl Yu the independent composite composition of oxazole acyl grass amine also does without the relevant raw data of surveyingSupport.

In order to make up above each single dose and to have reported the deficiency that complex preparation exists in actual application, the inventor has done deeplyEnter research, unexpected discovery on the basis of a large amount of formula indoor screenings and field control effectiveness test, promazine Sulfometuron Methyl is Yu oxazole acyl grassAmine is composite in certain ratio range, paddy field weed is had to good prevention effect, the preventive effect showing and activity levelExceed the stack of each component, there is unexpected synergistic function, solved above two kinds of herbicides in herbicide spectrum, preventive effectWith the limitation existing in security, reach and expanded herbicide spectrum, raising preventive effect, the object of security that improves.

[summary of the invention]

The object of the invention is to according to the current present situation of herbicide for paddy field, and paddy field weed a situation arises, provide oneKind is safe, efficient, the herbicidal composition for agent for removing grass in paddy field of wide spectrum.

For realizing object of the present invention, the invention discloses a kind of herbicidal composition, two kinds of activity of its a by effective dose and bOne-tenth is grouped into.

Wherein, active component a is promazine Sulfometuron Methyl (Propyrisulfuron), other titles: piperazine imidazoles Sulfometuron Methyl, chemical nameClaim: 1-(the chloro-6-propyl imidazole of 2-[1,2-b] pyridazine-3-base sulfonyl)-3-(4,6-dimethoxypyridin-2-yl) urea, structural formula is:

Active component b is oxazole acyl grass amine (Metamifop), other titles: Han Qiuhao, chemical name: (2R)-2-[4-[(6-Chloro-2-Ben oxazolyl)] phenoxy group]-N-(2-fluorobenzene)-N-methyl propanamide, structural formula is:

The weight ratio of described active component a and b is: a promazine Sulfometuron Methyl: b oxazole acyl grass amine=1:40～32:5, be preferably 1:10～8:5,More preferably 2:5, the weight percentage of two active components in herbicidal composition is 1～80%; Herbicide of the present inventionIn composition, the content of active component depends on amount of application when every kind of component is used separately, also depends on that a kind of component is with another kind ofThe ratio of component and the degree of synergistic effect.

Herbicidal composition of the present invention except two kinds of active ingredients, can also add carrier, adhesive, disintegrant, dispersant,Wetting agents etc. and other contribute to the known substance of active ingredient stable and drug effect performance in preparation.

Herbicidal composition of the present invention can be processed into the various formulations of the applicable agricultural uses such as wettable powder, granule, suspending agent,Preferred dosage form is wettable powder.

Wettable powder of the present invention is adjuvant used to be comprised:

Dispersant can be lignosulfonates, polycarboxylate, alkylnaphthalene sulfonate, neopelex, alkyl polyoxyOne or more in vinethene sulfonate, alkylphenol-polyethenoxy base ether formaldehyde condensation products, consumption is 2～12% of preparation total amount;

Wetting agent can be lauryl sodium sulfate, Teepol, AEO, NPE,One or more in sorbitan fatty acid ester APEO, consumption is 1～10% of preparation total amount;

Appropriate carrier can be one or more in kaolin, diatomite, attapulgite, bentonite, white carbon.

Granule of the present invention is adjuvant used to be comprised:

Dispersant can be alkylnaphthalene sulfonate, dispersant NNO, lignosulfonates, alkylbenzenesulfonate, alkyl ethyl sulphurOne or more in hydrochlorate, polycarboxylate, consumption is 0.5～15% of preparation total amount;

Adhesive can be a kind of or many in bentonite, hydroxypropyl cellulose, polyacrylamide, polyethylene glycol, polyvinyl alcoholKind, consumption is 0.2～5% of preparation total amount;

Disintegrant can be one or more in calcium chloride, sodium chloride, magnesium chloride, aluminium chloride, and consumption is preparation total amount0.05～5％；

Appropriate carrier can be ammonium sulfate, urea, potassium dihydrogen phosphate, calcium superphosphate, diatomite, white carbon, precipitated calcium carbonate,One or more in talcum powder, attapulgite, potter's clay, kaolin.

Suspending agent of the present invention is adjuvant used to be comprised:

Dispersant can be polycarboxylate, lignosulfonates, alkylnaphthalene sulfonate, TERSPERSE2425, alkyl phenol polyoxyOne or more in vinethene, consumption is 1～8% of preparation total amount;

Wetting agent can be alkylphenol-polyethenoxy base ether formaldehyde condensation products sulfate, alkylphenol-polyethenoxy base ether phosphate, benzeneOne or more in ethyl phenol polyoxyethylene groups ether phosphate, alkyl sulfate, naphthalene sulfonate, consumption is preparation total amount0.1～5％；

Thickener can be one or more in xanthans, carboxymethyl cellulose, Sodium Polyacrylate, bentonite, aluminium-magnesium silicate,Consumption is 0.1～0.5% of preparation total amount;

Antifreezing agent can be one or more in ethylene glycol, propane diols, glycerine, urea, and consumption is 2～6% of preparation total amount;

Anticorrisive agent can be one or more in formaldehyde, sorbic acid, Sodium Benzoate, and consumption is 0.1～2% of preparation total amount;

Defoamer can be silicone based defoamer, and consumption is 0.1～0.2% of preparation total amount;

Appropriate amount of deionized water.

Herbicidal composition provided by the invention is mainly used in rice terrace management of weeds, compared with prior art, the present invention possess withLower beneficial effect:

1, Herbicidal combinations of the present invention adopts promazine Sulfometuron Methyl with oxazole acyl grass amine is composite, and two active components are in certain ratio rangeCompositely show fabulous synergistic function, mixed composition has significantly improved herbicidal effect compared with single dose, thereby has reducedUsing dosage, in reducing peasant's drug cost, has reduced the adverse effect of agricultural chemicals to ecological environment.

2, Herbicidal combinations of the present invention has expanded herbicide spectrum, makes a kind of medicament can prevent and treat multiple weeds simultaneously, and a kind of utmost point is providedIts means of prevention easily and effectively, all has good preventive effect to rice terrace main weeds.

3, Herbicidal combinations of the present invention adopts two kinds of different mechanisms of action to kill weeds, and the different action characteristics of medicament make two kinds of workBetween property composition, produce extremely strong mutual supplement with each other's advantages, can effectively delay generation and the development of single dose resistance.

4, the present composition, to rice safety, can be killed rice field main weeds in the situation that not injuring paddy rice.

[detailed description of the invention]

In order to make object of the present invention, technical scheme and advantage clearer, the present invention says with following specific embodimentBright, but only limit to absolutely not this. The following stated is the good embodiment of the present invention, only, for describing the present invention, can not be interpreted asLimitation of the present invention, it should be noted that any amendment of making within the spirit and principles in the present invention, is equal to and replaces and changeEnter, within all should being included in protection scope of the present invention.

Example of formulations 1:50% promazine Mi Huang Long oxazole acyl grass amine wettable powder

Take 14.3% promazine Sulfometuron Methyl, 35.7% oxazole acyl grass amine, 2% lauryl sodium sulfate, 5% sodium lignin sulfonate, whiteCarbon black 10%, kaolin complements to 100%, often regulation is for the method for wettable powder, before mixing, air-flow crushing, afterMix, obtain 50% promazine Mi Huang Long oxazole acyl grass amine wettable powder.

Example of formulations 2:77% promazine Mi Huang Long oxazole acyl grass amine wettable powder

Take 7% promazine Sulfometuron Methyl, 70% oxazole acyl grass amine, 3% alkylnaphthalene sulfonate, 4% AEO, Gao LingSoil complements to 100%, and often regulation is for the method for wettable powder, i.e. front mixing, air-flow crushing, rear mixing obtain 77% the thirdPiperazine Mi Huang Long oxazole acyl grass amine wettable powder.

Example of formulations 3:37% promazine Mi Huang Long oxazole acyl grass amine granule

Take 32% promazine Sulfometuron Methyl, 5% oxazole acyl grass amine, 12% dispersant NNO, 0.2% carboxylic propyl methocel, 1%Starch, 3% calcium chloride, precipitated calcium carbonate complements to 100%, often regulation for the method for granule before mixing, air-flow crushing,Rear mixing, the kneading that adds water, granulation, screening, obtain described 37% promazine Mi Huang Long oxazole acyl grass amine granule.

Example of formulations 4:28% promazine Mi Huang Long oxazole acyl grass amine granule

Take 8% promazine Sulfometuron Methyl, 20% oxazole acyl grass amine, 10% alkylbenzenesulfonate, 2% bentonite, 5% sodium chloride, 8%Calcium superphosphate, white carbon 5%, diatomite complements to 100%, often regulation for the method for granule before mixing, air-flow crushing,Rear mixing, the kneading that adds water, granulation, screening, obtain described 28% promazine Mi Huang Long oxazole acyl grass amine granule.

Example of formulations 5:42% promazine Mi Huang Long oxazole acyl grass amine suspending agent

Take 7% promazine Sulfometuron Methyl, 35% oxazole acyl grass amine, 2%TERSPERSE2425,12% phenethyl phenol polyethenoxy baseEther phosphate, 0.2% xanthans, 4% glycerine, 0.5% Sodium Benzoate, 0.1% silicone based defoamer, deionized water complement to100%, often regulation is for the method for suspending agent, and high speed shear is disperseed, sand milling is pulverized, mediation, obtains 42% promazine Mi Huang Long EvilAzoles acyl grass amine suspending agent.

Example of formulations 6:13% promazine Mi Huang Long oxazole acyl grass amine suspending agent

Take 8% promazine Sulfometuron Methyl, 5% oxazole acyl grass amine, 3% lignosulfonates, 10% alkylphenol-polyethenoxy base ether phosphoric acidEster, 0.1% Sodium Polyacrylate, 5% propane diols, 1% sorbic acid, 0.1% silicone based defoamer, deionized water complement to 100%,Often regulation is for the method for suspending agent, and high speed shear is disperseed, sand milling is pulverized, mediation, obtains 13% promazine Mi Huang Long oxazole acyl grassAmine suspending agent.

The raw embodiment 1 that surveys:

Promazine Sulfometuron Methyl is with oxazole acyl grass amine cauline leaf is processed synergy toxicity determination test

In order to prevent and treat the paddy field weed in agricultural production, inventor has studied promazine Sulfometuron Methyl with oxazole acyl grass amine binary builtHerbicidal effect, and evaluate the synergy type after the two different proportion is used with by the abundant method of Sun Yun, be promazine Sulfometuron Methyl and oxazole acylThe rational mixture of grass amine provides scientific basis. Experiment is with reference to " farm-chemical indoor determination experiment criterion herbicide the 9th part ".

1, experimental condition

1.1 for examination weeds

Moleplant seed, lady's-grass, false loosestrife, cyperus iria

1.2 reagent agent

Promazine Sulfometuron Methyl

Oxazole acyl grass amine

2, examination material is prepared

Cultivation for examination weeds adopts potted plant cultivation. By 11 × 12cm plastic tub, the farmland that did not use herbicide is adoptedSoil air-dry, fill basin after sieving, quantitative 4/5 place of dry ground in basin, P in soil H value 7.2, the content of organic matter 1.1%. Adopt topPortion's pouring mode makes soil completely moistening. Then by through vernalization pretreated moleplant seed, lady's-grass, false loosestrife, cyperus iriaSeed uniform broadcasting is in soil surface, and every basin is broadcast 30-40 grain, and earthing 1-2mm is placed in cellar culture in greenhouse. IncubationIn with top irrigation method moisturizing to saturation state, after weeds emerge, every basin is decided to be 20 strains.

3, experimental design

46 processing are established in this test altogether, wherein promazine Sulfometuron Methyl establish 52.5,60,67.5,82.5,135ga.i./hm²5 dosageProcess that ， oxazole acyl grass amine establishes 120,150,180,210,300ga.i./hm²5 dosage processing. Promazine Sulfometuron Methyl is with oxazole acylThe two mixed establishes 7 assembly than processing grass amine: 1:160,1:40,1:10,2:5,8:5,32:5,128:5, dosage is 52.5,60、67.5、82.5、135ga.i./hm², separately establish 1 clear water contrast, amount to 46 processing, repeat 4 times.

4, application method

The dispenser time limit is carried out cauline leaf spraying processing while fixing on 2～4 leaf phase of weeds, be placed in spray medicine (ASS-4 type pesticide spraying system in towerSystem, DG8003 shower nozzle, atomisation pressure 2.75MPA, spouting liquid 30Kg/ mu), treat that natural air drying is placed on cultivation in greenhouse and seesExamine.

5, data survey and statistical analysis

After dispenser, record in detail the symptom of being injured of weeds, process latter 45 days, carry out fresh weight measurement, and compare with control treatment,Calculate weeds fresh weight preventive effect. By the linear regression analysis between probability value and the logarithm value of series concentration of preventive effect, calculate eachED50 and the coefficient correlation processed, evaluate the biologically active of each processing to weeds, uses the abundant method of Sun Yun to calculate different medicament proportioningsCo-toxicity coefficient, evaluate the synergy situation of different proportionings, determine promazine Sulfometuron Methyl Yu the optimum activity ratio of oxazole acyl grass amine.

The abundant method computing formula of Sun Yun:

$E=\frac{C-T}{C}\×100................................................\left(1\right)$

In formula: E---fresh weight preventive effect;

C---contrast weeds aerial part weeds fresh weight;

T---process weeds aerial part weeds fresh weight.

$\mathrm{ATI}=\frac{S}{M}\×100.......................................\left(2\right)$

In formula: ATI---mixture actual measurement toxicity index;

The ED of S---standard herbicide₅₀, unit is a gram per hectare (ga.i./hm²)；

The ED of M---mixture₅₀, unit is a gram per hectare (ga.i./hm²)。

TTI＝TI_A×P_A+TI_B×P_B……………………………………………(3)

In formula: TTI---the theoretical toxicity index of mixture;

TI_A---A medicament toxicity index;

P_A---the percentage composition of A medicament in mixture, unit is percentage (%);

TI_B---B medicament toxicity index;

P_B---the percentage composition of B medicament in mixture, unit is percentage (%);

$\mathrm{CTC}=\frac{\mathrm{ATI}}{\mathrm{TTI}}\×100.................................\left(4\right)$

In formula: CTC---co-toxicity coefficient;

ATI---mixture actual measurement toxicity index;

The theoretical toxicity index of TTI---mixture.

Co-toxicity coefficient CTC >=120 of built agent show as synergistic effect; CTC≤80 show as antagonism; 80 < CTC <120 show as summation action.

6, results and analysis is in table 1～4

Table 1 promazine Sulfometuron Methyl is with oxazole acyl grass amine mixture control paddy field weed moleplant seed virulence

Table 2 promazine Sulfometuron Methyl is with oxazole acyl grass amine mixture control paddy field weed lady's-grass virulence

Table 3 promazine Sulfometuron Methyl is with oxazole acyl grass amine mixture control paddy field weed false loosestrife virulence

Table 4 promazine Sulfometuron Methyl is with oxazole acyl grass amine mixture control paddy field weed cyperus iria virulence

Toxicity Determination result shows, promazine Sulfometuron Methyl is mixed right in the scope of weight ratio 1:160～128:5 with oxazole acyl grass amineWeeds show as and are added or synergistic effect, and mixed in the scope of weight ratio 1:40～32:5 have good synergistic effect, in weight ratioMixed in the scope of 1:10～8:5 have obvious synergistic effect, expanded control of weeds spectrum, reached and prevented and kill off grass family, wealthy simultaneouslyThe object of leaf and sedge weed.

The raw embodiment 2 that surveys:

Promazine Sulfometuron Methyl is with the composite cauline leaf of oxazole acyl grass amine is processed the Security test test to paddy rice

In order to study promazine Sulfometuron Methyl with the composite cauline leaf of oxazole acyl grass amine is processed the security to paddy rice, for promazine Sulfometuron Methyl is with oxazoleThe rational mixture of acyl grass amine provides scientific basis, and inventor has done following test, and test is with reference to People's Republic of China's agricultural industryStandard NY/T1155.8-2007 farm-chemical indoor determination experiment criterion-herbicide, the 8th part: the safety testing stem of cropLeaf spray-on process.

1, experimental condition

1.1 for studying thing

Paddy rice

1.2 for examination weeds

Barnyard grass

1.3 reagent agent

Promazine Sulfometuron Methyl

Oxazole acyl grass amine

2, examination material is prepared

2.1 for studying thing

Adopt greenhouse pot culture method for the cultivation that studies thing, by 11 × 12cm plastic tub, put in shallow-water tank, will not useThe soil of adopting back in the farmland of herbicide is air-dry, after sieving, fills basin, quantitative 4/5 place of dry ground in basin, and P in soil H value 7.2, organicMatter content 1.1%. After adopting pouring mode in top to make soil completely moistening, rice paddy seed is quantitatively broadcasted sowing in soil surface to earthing1.0cm, 28～32 DEG C/18～25 DEG C of indoor temperatures (d/n), relative humidity 75% ± 15%. In incubation with top irrigation methodMoisturizing is to saturation state. After rice seedling, every basin is decided to be 10 strains.

2.2 for examination weeds

Cultivation for examination weeds adopts greenhouse pot culture method, by 11 × 12cm plastic tub, puts in shallow-water tank, will not use and removesThe soil of adopting back in the farmland of grass agent is air-dry, after sieving, fills basin, quantitative 4/5 place of dry ground in basin, P in soil H value 7.2, organic matterContent 1.1%. After adopting basin alms bowl bottom infiltrating irrigation mode to make soil completely moistening, by pretreated for examination weed seed quantitatively broadcast sowing inSoil surface, earthing 2mm, 28～32 DEG C/18～25 DEG C of indoor temperatures (d/n), relative humidity 75% ± 15%. Irrigate with topMode moisturizing is to saturation state, and after barnyard grass is emerged, every basin is decided to be 10 strains.

3, experimental design

3.1 weeds dispenser dosage

36 processing are established in test altogether, wherein promazine Sulfometuron Methyl establish 20,30,40,50,60ga.i./hm²5 dosage are processed ， EvilAzoles acyl grass amine establishes 40,60,80,100,120ga.i./hm²5 dosage processing. Promazine Sulfometuron Methyl He oxazole acyl grass amine the two is mixedWith establishing 5 assembly than processing: 1:40,1:10,2:5,8:5,32:5, dosage is 20,30,40,50,60ga.i./hm²，Separately establish 1 clear water contrast, amount to 36 processing, repeat 4 times.

3.2 crop dispenser dosage

36 processing are established in test altogether, wherein promazine Sulfometuron Methyl establish 60,90,120,150,180ga.i./hm²5 dosage processing,Oxazole acyl grass amine establishes 180,270,360,450,540ga.i./hm²5 dosage processing. Promazine Sulfometuron Methyl is with oxazole acyl grass amine twoPerson is mixed establishes 5 assembly than processing: 1:40,1:10,2:5,8:5,32:5, dosage is 180,270,360,450,540ga.i./hm²，Separately establish 1 clear water contrast, amount to 36 processing, repeat 4 times.

4, application method

The dispenser time limit is carried out cauline leaf spraying processing while fixing on 21 heart stages of leaf of paddy rice, 2～4 leaf phase of weeds, be placed in spray medicine (ASS-4 in towerType pesticide spraying system, DG8003 shower nozzle, atomisation pressure 2.75MPA, spouting liquid 30Kg/ mu), treat that natural air drying is placed onIn greenhouse, cultivate and observe.

5, data survey and statistical analysis

5.1 crop investigation

After dispenser, investigate each processing paddy rice and have or not symptom of chemical damage, record in detail symptom of chemical damage if having, within after medicine 45 days, weigh everywhereReason paddy rice fresh weight, calculates fresh weight inhibiting rate, the security with clear and definite test medicine to paddy rice.

5.2 weeds investigation

After dispenser, record in detail the symptom of being injured (as growth inhibition, chlorosis, deformity etc.) of weeds, after medicine 45 days, weigh eachProcess weeds aerial part fresh weight, adopt growth inhibition assay to calculate the fresh weight preventive effect of weeds.

5.3 growth inhibition assay computing formula

$E=\frac{T_0-T_1}{T_0}\&times;100...............................\left(5\right)$

In formula:

E-fresh weight preventive effect, unit is percentage (%);

T₀-contrast weeds aerial part fresh weight, unit is gram;

T₁-processing weeds aerial parts fresh weight, unit is gram.

5.4 selectivity index computational methods

6, results and analysis is in table 5～7

Table 5 promazine Sulfometuron Methyl and the preventive effect of the different mixtures' ratios of oxazole acyl grass amine to barnyard grass

Table 6 promazine Sulfometuron Methyl and the security of the different mixtures' ratios of oxazole acyl grass amine to paddy rice

Table 7 promazine Sulfometuron Methyl and the selectivity index of the different mixtures' ratios of oxazole acyl grass amine to paddy rice

Note: in table 7 data be by market demand DPS2000 data handling system in table 5, table 6 (Tang Qiyi, Feng Mingguang.Practical Statistic is analyzed and DPS data handling system [M]. Beijing: Science Press, 2002.188-201) calculate.

In the time of selectivity index >=4, represent selectively very high between crops and weeds of medicament, as 2≤selectivity index < 4Time, represent that medicament has selectively between crops and weeds, in the time of selectivity index < 2, represent that medicament is at crops and weedsBetween poor selectivity. The Security test of paddy rice is tested and shown, promazine Sulfometuron Methyl and oxazole acyl grass amine are in weight ratioIn the scope of 1:40～32:5, use with paddy rice selectivity index is greater than to 2, to rice safety.

The raw embodiment 3 that surveys

Prevent and kill off paddy field weed field control effectiveness test I:

1, test is processed

(1) 50% promazine Mi Huang Long oxazole acyl grass amine wettable powder (1:40) 28g/ mu

(2) 50% promazine Mi Huang Long oxazole acyl grass amine wettable powder (1:10) 28g/ mus

(3) 50% promazine Mi Huang Long oxazole acyl grass amine wettable powder (2:5) 28g/ mus

(4) 50% promazine Mi Huang Long oxazole acyl grass amine wettable powder (8:5) 28g/ mus

(5) 50% promazine Mi Huang Long oxazole acyl grass amine wettable powder (32:5) 28g/ mus

(6) 9.5% promazine Sulfometuron Methyl suspending agent 147g/ mus

(7) 10% oxazole acyl grass amine wettable powder 140g/ mus

(8) blank

7 processing are established in test, repeat for 4 times, process community for totally 28,20 square metres of every processing community areas, random district groupArrange. (1)～(5) 50% promazine Mi Huang Long oxazole acyl grass amine wettable powder is reagent agent, 9.5% promazine Sulfometuron Methyl suspending agent and10% oxazole acyl grass amine wettable powder is contrast medicament. Every mu is watered 30 kilograms, adopts 552 third type sprayer (0.7mm holesFootpath) even spraying. Field main weeds has moleplant seed, lady's-grass, eleusine indica, Monochoria vaginalis, false loosestrife, cyperus iria etc.

2, pilot project and method

(1) security: after dispenser, the situation of growing of investigation paddy rice, evaluates the security of reagent agent to paddy rice.

(2) herbicidal effect: every community is got 4 points at random, investigates 1/4 square metre at every, investigation weed control in 45 days after dispenserEffect, records respectively weeds kind and strain number, calculates weeds strain preventive effect.

3, result of the test

(1) security: dispenser " Invest, Then Investigate ", chemicals treatment district Plant Height of Rice, Ye Se and blank district are basically identical, show to supplyReagent agent (1)～(5) 50% promazine Mi Huang Long oxazole acyl grass amine wettable powder is all to rice safety.

(2) herbicidal effect: in table 8

45 days various weed control efficacies after table 8 medicine

Note: (1) 50% promazine Mi Huang Long oxazole acyl grass amine wettable powder (1:40)

(2) 50% promazine Mi Huang Long oxazole acyl grass amine wettable powders (1:10)

(3) 50% promazine Mi Huang Long oxazole acyl grass amine wettable powders (2:5)

(4) 50% promazine Mi Huang Long oxazole acyl grass amine wettable powders (8:5)

(5) 50% promazine Mi Huang Long oxazole acyl grass amine wettable powders (32:5)

(6) 9.5% promazine Sulfometuron Methyl suspending agents

(7) 10% oxazole acyl grass amine wettable powders

(8) blank

As shown in Table 8,50% promazine Mi Huang Long oxazole acyl grass amine wettable powder of different proportionings exists to common weed strain preventive effectBetween 75.54%～96.59%, be all better than contrasting medicament 9.5% promazine Sulfometuron Methyl suspending agent and 10% oxazole acyl grass amine wettable powder(weeds strain preventive effect is respectively 54.25% and 53.67%). Wherein promazine Sulfometuron Methyl is with oxazole acyl grass amine is 1:40～32:5 in weight ratioTime rice terrace common weed is all had to obvious preventive effect, weeds strain preventive effect is all more than 75%; Promazine Sulfometuron Methyl He oxazole acyl grass amine existBetter to rice terrace common weed preventive effect when weight ratio is 1:10～8:5, weeds strain preventive effect is all more than 90%; And promazine Sulfometuron MethylWhen He oxazole acyl grass amine weight ratio is 2:5, preventive effect is especially up to 96.59%. Explanation thus, promazine Sulfometuron Methyl is with oxazole acyl grass amineWeight ratio within the scope of 1:40～32:5 time, has preventive effect to the common grass family of rice terrace, broad-leaved and sedge weed, and thisHerbicidal composition is to rice safety.

Prevent and kill off paddy field weed field control effectiveness test II:

1, test is processed

(1) 10% promazine Mi Huang Long oxazole acyl grass amine wettable powder (2:5) 140g/ mu

(2) 50% promazine Mi Huang Long oxazole acyl grass amine wettable powder (2:5) 28g/ mus

(3) 70% promazine Mi Huang Long oxazole acyl grass amine wettable powder (2:5) 20g/ mus

3 processing are established in test, repeat for 4 times, process community for totally 12,20 square metres of every processing community areas, random district groupArrange. (1)～(3) promazine Mi Huang Long oxazole acyl grass amine wettable powder is reagent agent, and every mu is watered 30 kilograms, adopts 552The third type sprayer (0.7mm aperture) even spraying. Field main weeds has moleplant seed, lady's-grass, eleusine indica, Monochoria vaginalis, fourthFragrant knotweed, cyperus iria etc.

2, pilot project and method

Herbicidal effect: every community is got 4 points at random, investigates 1/4 square metre at every, 45 days investigation weed control efficacies after dispenser,Record respectively weeds kind and strain number, calculate weeds strain preventive effect.

3, result of the test: herbicidal effect is in table 9

45 days various weed control efficacies after table 9 medicine

Note: (1) 10% promazine Mi Huang Long oxazole acyl grass amine wettable powder (2:5)

(2) 50% promazine Mi Huang Long oxazole acyl grass amine wettable powders (2:5)

(3) 70% promazine Mi Huang Long oxazole acyl grass amine wettable powders (2:5)

As shown in Table 9, when promazine Sulfometuron Methyl with the weight ratio of oxazole acyl grass amine while being 2:5, the promazine Mi Huang Long Evil of different contentAzoles acyl grass amine wettable powder all more than 95%, shows promazine Sulfometuron Methyl with oxazole acyl grass amine weight ratio to common weed strain preventive effectDuring for optimal proportion, the herbicidal composition of different activities component content all has significant preventive effect to weeds.

In sum, component of the present invention is reasonable, and the activity that preventive effect is better than each component while using separately, to grassy weed, broad-leavedWeeds and sedge weed all have good preventive effect, have expanded control of weeds spectrum, have delayed the generation of herbicide resistance, rightCrop safety, meets the security requirement of pesticidal preparations.

Claims (6)

1. a herbicidal composition, is characterized in that said composition is made up of a and two kinds of active components of b and usual auxiliaries, itsMiddle active component a is promazine Sulfometuron Methyl, active component b Wei oxazole acyl grass amine, and two active component weight ratios are: a promazine Sulfometuron Methyl: bOxazole acyl grass amine=1:40～32:5.

2. herbicidal composition according to claim 1, is characterized in that active component weight ratio is: a promazine Sulfometuron Methyl: bOxazole acyl grass amine=1:10～8:5.

3. herbicidal composition according to claim 2, is characterized in that active component weight ratio is: a promazine Sulfometuron Methyl: bOxazole acyl grass amine=2:5.

4. according to the herbicidal composition described in any one in claim 1-3, it is characterized in that active component is in combinations of herbicidesPercentage composition in thing is 1～80%.

5. herbicidal composition according to claim 1, is characterized in that said composition can be upper allow arbitrary of agriculturalPlant formulation.

6. herbicidal composition claimed in claim 1 is in the application of preventing and kill off in paddy field weed.