CN104186517B - A kind of herbicidal composition containing flucetosulfuron - Google Patents

Abstract

The present invention is a kind of herbicidal composition containing flucetosulfuron, disclose a kind of weed killer herbicide for preventing and kill off paddy field weed, it is the binary herbicidal composition that active component forms by promazine Sulfometuron Methyl and flucetosulfuron, in said composition, promazine Sulfometuron Methyl and flucetosulfuron weight ratio is therebetween 3:20 ~ 192:5, and mass percentage is 5 ~ 80% of described complex weedicide.This complex weedicide can be prepared into the regular dosage forms such as wetting powder, water dispersible granules, granule, herbicidal composition of the present invention can prevent and kill off the various weeds of paddy field simultaneously, significantly improve the preventive effect to paddy field weed, effective ingredient consumption is few, use cost is low, to paddy rice and succession crop safety, it is a kind of desirable weed killer herbicide.

Description

A kind of herbicidal composition containing flucetosulfuron

[technical field]

The invention belongs to technical field of pesticide, being specifically related to a kind of herbicidal composition containing promazine Sulfometuron Methyl and flucetosulfuron, for preventing and kill off paddy field weed.

[background technology]

Paddy rice is the important cereal crops of China, all has plantation throughout the country, the rice field of all rice workspaces of China, always have a large amount of weeds to occur, and weeds kind is many, and harm is heavy, and chemical method weeding is that paddy field controls one of Main Means of weeds.But to use a certain class weed killer herbicide and the change of paddy field cropping system, the introducing of new varieties in rice field due to long-term, make weed community that significantly change occur, weeds in paddy field bamboo telegraph also constantly spreads, and some weed killer herbicides have been found to create resistance; Simultaneously because grass when weeds occur is mutually complicated, grass family, broad-leaved and sedge weed have concurrently, and weeds seedling-growing time is uneven, so when weed killer herbicide kind is used alone, all can show defect in a certain respect and limitation.Therefore, the weed killer herbicide that development of new prevents and kill off paddy field weed is the important means of current paddy field weeding, is also the key guaranteeing paddy rice good harvest high yield.

Promazine Sulfometuron Methyl is by the pyrimidine radicals sulfonylurea selectivity broad-spectrum herbicide of SUMITOMO CHEMICAL chemistry exploitation, although identical with the mechanism of action of other sulfonylurea herbicides, for acetolactate synthestase (ALS) inhibitor, but the weeds of its antagonism sulfonylurea herbicide have good preventive effect, there is residual effect effect, be mainly used in paddy field and prevent and kill off multiple annual gramineae and broad leaved weed.This weed killer herbicide consumption is low, to rice safety, but poor to the preventive effect of part sedge weed as needle spikesedge herb, difformed galingale herb, flat stalk Fischer grass etc.

Flucetosulfuron belongs to sulfonylurea herbicide, it is acetolactate synthestase (ALS) inhibitor, can be used for water paddy soil or cauline leaf process, after being absorbed by the root of plant, stem and leaf, by suppressing the acetolactate synthestase of plant, hindering branched-chain amino acid as the biosynthesis of valine, leucine, isoleucine, thus destroying the synthesis of protein, the interference synthesis of DNA and cell division and growth, finally cause Plant death.Flucetosulfuron all has preventive effect to grassy weed, broad leaved weed and sedge weed, but in actual use, different to weed control efficacies different in each section, such as about 90% is reached to preventive effects such as barnyard grass, flat stalk Fischer grass, angustifolia arrowhead herb, false loosestrife, nutgrass flatsedges, poor to the preventive effect of Paspalum distichum, moleplant seed and pondweed etc.

Retrieved by pertinent literature, domestic existing to promazine Sulfometuron Methyl, patent document that flucetosulfuron is relevant, Chinese patent CN103271064A discloses a kind of herbicidal composition containing promazine Sulfometuron Methyl and cyhalofop-butyl, said composition is better to broad-leaved and grassy weed preventive effect, but poor to the preventive effect of part sedge weed; Chinese patent CN102657207A discloses flucetosulfuron with the herbicidal composition of metamifop mixture, said composition to grass family and sedge weed field efficacy good, but be not very desirable to the preventive effect of some broad leaved weed.

In order to make up above each single dose and report the deficiency that complex preparation exists in actual application, the present inventor furthers investigate, unexpected discovery on the basis of the screening of a large amount of formula indoors and field control effectiveness test, promazine Sulfometuron Methyl and flucetosulfuron composite in certain ratio range, to paddy field weed, there is excellent control efficiency, the preventive effect shown and activity level exceed the superposition of each component, there is unforeseeable synergistic function, solve above two weed killer herbicides to compose in herbicide, preventive effect, the limitation that safety exists, reach and expand herbicide spectrum, improve preventive effect, improve the object of safety.

[summary of the invention]

The object of the invention is to the present situation according to current herbicide for paddy field, and paddy field weed a situation arises, provide a kind of efficient, low toxicity, broad weed-killing spectrum, be conducive to the composition pesticide of the paddy field weed comprehensive regulation.

Present invention employs following technical scheme: a kind of herbicidal composition, include promazine Sulfometuron Methyl and flucetosulfuron two kinds of active components of effective amount.Wherein, promazine Sulfometuron Methyl (Propyrisulfuron), other titles: piperazine imidazoles Sulfometuron Methyl, molecular formula is C ₁₆h ₁₈clN ₇o ₅s, chemical name: 1-(the chloro-6-propyl imidazole [1,2-b] of 2-pyridazine-3-base sulfonyl)-3-(4,6-dimethoxypyridin-2-base) urea, structural formula is:

Flucetosulfuron (Flucetosulfuron), other titles: Han Lesheng, molecular formula is: C ₁₈h ₂₂fN ₅o ₈s, chemical name: 1-[[(4,6-dimethoxypyridin-2-base) is amino] carbonyl]-2-[the fluoro-1-of 2-(methoxymethylcarbonyl oxygen) propyl group]-3-pyridine sulfonyl sulfonyl base urea, structural formula is:

In described herbicidal composition, the weight ratio of active ingredient promazine Sulfometuron Methyl and flucetosulfuron is 3:20 ~ 192:5, and be preferably 3:5 ~ 48:5, more preferably 12:5, the weight percentage of two active components in herbicidal composition is 5 ~ 80%.

Herbicidal composition of the present invention, except two kinds of active ingredients, can also add carrier, solvent, emulsifier, dispersant, wetting agent etc. and other contribute to the active ingredient known substance that plays of stable and drug effect in the formulation.

As preferably, herbicidal composition of the present invention can be processed into the various formulations of the applicable agricultural uses such as wetting powder, water dispersible granules, granule, more preferably wetting powder.

Described wetting powder dispersant used can be selected from lignosulfonates, polycarboxylate, alkylnaphthalene sulfonate, neopelex, alkyl polyoxyethylene ether sulfonate, alkylphenol-polyethenoxy base ether formaldehyde condensation products etc. one or more; Wetting agent can be selected from lauryl sodium sulfate, Teepol, fatty alcohol-polyoxyethylene ether, polyoxyethylene nonylphenol ether, sorbitan fatty acid ester APEO etc. one or more; Carrier can be selected from kaolin, diatomite, attapulgite, bentonite, white carbon etc. one or more.

Described water dispersible granules dispersant used can be selected from polycarboxylate, lignosulfonates, alkylnaphthalene sulfonate, alkylphenol polyoxyethylene, alkyl polyoxyethylene ether sulfonate etc. one or more; Wetting agent can be selected from naphthalene sulfonate, lauryl sodium sulfate, sorbitan fatty acid ester polyoxyethylene ether, alkylsulfonate etc. one or more; Disintegrant can be selected from ammonium sulfate, urea, starch and derivative thereof, low-substituted hydroxypropyl cellulose, polyvinylpyrrolidone, sodium alginate etc. one or more; Adhesive can be selected from hydroxyethylcellulose, soluble starch, polyethylene glycol, methylcellulose, polycarboxylic acid and water-soluble high-molecular compound sodium carboxymethylcellulose, polyvinyl alcohol etc. one or more; Carrier can be selected from white carbon, kaolin, bentonite, precipitated calcium carbonate, gypsum, attapulgite, urea, sucrose etc. one or more.

Described granule dispersant used can be selected from alkylnaphthalene sulfonate, dispersant NNO, lignosulfonates, alkylbenzenesulfonate, alkyl ethyl sulfonate, polycarboxylate etc. one or more; Adhesive can be selected from paraffin, gypsum, hydroxypropyl methylcellulose, polyacrylamide, bentonite, polyethylene glycol, polyvinyl alcohol etc. one or more; Disintegrant can be selected from calcium chloride, sodium chloride, magnesium chloride, aluminium chloride etc. one or more; Carrier can be selected from ammonium sulfate, urea, potassium dihydrogen phosphate, superphosphate, diatomite, white carbon, precipitated calcium carbonate, talcum powder, attapulgite, potter's clay, stone coal slag, clay, sand, sawdust etc. one or more.

Herbicidal composition provided by the invention is mainly used in paddy field management of weeds, and compared with prior art, the present invention possesses following beneficial effect:

1, herbicidal composition provided by the invention, expand herbicide spectrum, in certain ratio range, show synergistic function, the weeds of especially resisting sulfonylurea herbicide have special efficacy, decrease the using dosage of agricultural chemicals, reduce drug cost and agricultural chemicals to the adverse effect of ecotope.

2, herbicidal composition provided by the invention, use cost is low, easy to use, time saving and energy saving, and the resistance risk of Long-Time Service single herbicide generation can be reduced, extend the service life of medicament, it applies huge economic benefit and social benefit.

3, herbicidal composition provided by the invention is low to crop, toxicity to man and livestock, can kill various weeds when not injuring crop, safer to crop.

[embodiment]

In order to make object of the present invention, technical scheme and advantage clearly understand, the following specific embodiment of the present invention is described, but is only limitted to this absolutely not.The following stated is the good embodiment of the present invention; only for describing the present invention; can not limitation of the present invention be interpreted as, it should be noted that any amendment done within the spirit and principles in the present invention, equivalent replacement and improve, all should be included within protection scope of the present invention.

Example of formulations 1:10% promazine Sulfometuron Methyl flucetosulfuron wetting powder

Take 7.05% promazine Sulfometuron Methyl, 2.95% flucetosulfuron, 2% lauryl sodium sulfate, 3% sodium lignin sulfonate, kaolin complements to 100%, frequent regulation is for the method for wetting powder, i.e. forward slip value, air-flow crushing, rear mixing, obtains 10% promazine Sulfometuron Methyl flucetosulfuron wetting powder.

Example of formulations 2:80% promazine Sulfometuron Methyl flucetosulfuron wetting powder

Take 30% promazine Sulfometuron Methyl, 50% flucetosulfuron, 3% alkylnaphthalene sulfonate, 4% fatty alcohol-polyoxyethylene ether, white carbon complements to 100%, frequent regulation is for the method for wetting powder, i.e. forward slip value, air-flow crushing, rear mixing, obtains 80% promazine Sulfometuron Methyl flucetosulfuron wetting powder.

Example of formulations 3:53% promazine Sulfometuron Methyl flucetosulfuron water dispersible granules

Take 48% promazine Sulfometuron Methyl, 5% flucetosulfuron, 4% alkylphenol polyoxyethylene, 2% naphthalene sulfonate, 1% sodium alginate, 0.5% hydroxyethylcellulose, bentonite complements to 100%, frequent regulation is for the method for water dispersible granules, i.e. forward slip value, air-flow crushing, rear mixing, add water kneading, granulation, screening, obtains 53% promazine Sulfometuron Methyl flucetosulfuron water dispersible granules.

Example of formulations 4:23% promazine Sulfometuron Methyl flucetosulfuron water dispersible granules

Take 3% promazine Sulfometuron Methyl, 20% flucetosulfuron, 5% polycarboxylate, 2% alkylsulfonate, 2% polyvinylpyrrolidone, 1% polyethylene glycol, attapulgite complements to 100%, frequent regulation is for the method for water dispersible granules, i.e. forward slip value, air-flow crushing, rear mixing, add water kneading, granulation, screening, obtains 23% promazine Sulfometuron Methyl flucetosulfuron water dispersible granules.

Example of formulations 5:32% promazine Sulfometuron Methyl flucetosulfuron granule

Take 20% promazine Sulfometuron Methyl, 12% flucetosulfuron, 12% dispersant NNO, 0.2% carboxylic propyl methocel, 1% starch, 3% calcium chloride, precipitated calcium carbonate complements to 100%, frequent regulation for granule method and forward slip value, air-flow crushing, rear mixing, add water kneading, granulation, screening, obtains described 32% promazine Sulfometuron Methyl flucetosulfuron granule.

Example of formulations 6:19.7% promazine Sulfometuron Methyl flucetosulfuron granule

Take 19.2% promazine Sulfometuron Methyl, 0.5% flucetosulfuron, 10% alkylbenzenesulfonate, 2% bentonite, 5% sodium chloride, 8% superphosphate, white carbon complement to 100%, frequent regulation for granule method and forward slip value, air-flow crushing, rear mixing, add water kneading, granulation, screening, obtains described 19.7% promazine Sulfometuron Methyl flucetosulfuron granule.

Raw survey embodiment 1

Promazine Sulfometuron Methyl and flucetosulfuron cauline leaf process synergy toxicity determination test

In order to prevent and treat paddy field grassy weed in agricultural production, broad leaved weed and sedge weed, inventors have investigated the herbicidal effect of promazine Sulfometuron Methyl and flucetosulfuron binary built, and the synergy type after using with Sun Yun abundant both method evaluations different proportion, for the rational mixture of promazine Sulfometuron Methyl and flucetosulfuron provides scientific basis.Experiment is with reference to " farm-chemical indoor determination experiment criterion weed killer herbicide the 9th part ".

1, experimental condition

1.1 for examination weeds

Pondweed, Paspalum distichum, difformed galingale herb, flat stalk Fischer grass;

1.2 reagent agent

Promazine Sulfometuron Methyl

Flucetosulfuron

2, try material to prepare

Cultivation for examination weeds adopts potted plant cultivation.By 18 × 14cm plastic basin, by adopt in the farmland not using weed killer herbicide the soil of returning air-dry, sieve after fill basin, in basin, dry ground is quantitatively to plastic basin 4/5 place, P in soil H value 7.0, the content of organic matter 1.2%.Adopt infiltrating irrigation mode bottom basin alms bowl, make soil completely moistening.Then by the seed uniform broadcasting through the pretreated pondweed of vernalization, Paspalum distichum, difformed galingale herb, flat stalk Fischer grass in soil surface, every basin broadcasts 30 ~ 40, earthing 1 ~ 2mm, is placed in cellar culture in greenhouse.In incubation with the irrigation method moisturizing of basin alms bowl top to saturation state.After weeds emerge, every basin is decided to be 10 strains.

3, experimental scheme

46 process are established in this test altogether, wherein promazine Sulfometuron Methyl establish 20,35,50,65,80g a.i./hm ²5 dosage process, flucetosulfuron establishes 8,14,20,26,32g a.i./hm ²5 dosage process.Promazine Sulfometuron Methyl+both flucetosulfurons are mixed establishes 7 assembly than process: 3:80,3:20,3:5,12:5,48:5,192:5,768:5, dosage is 8,14,20,26,32g a.i./hm ², separately establish 1 clear water contrast, amount to 46 process, repeat 4 times.

4, application method

The dispenser time limit carries out cauline leaf spraying process when fixing on weeds 2.5 ~ 5 leaf phase, be placed in spray medicine (ASS-4 type pesticide spraying system, DG8003 shower nozzle, atomisation pressure 2.75MPA in tower, spouting liquid 30Kg/ mu), treat after dispenser that natural air drying is placed in greenhouse to cultivate and observe.

5, data survey and statistical analysis

Record the damage symptoms of weeds after dispenser in detail, process latter 20 days, carry out fresh weight measurement, and compared with control treatment, calculate weeds fresh weight preventive effect.By the linear regression analysis between the probability value of preventive effect and the logarithm value of series concentration, calculate the ED of each process ₅₀and correlation coefficient, evaluate the biologically active of each process to weeds, use the abundant method of Sun Yun to calculate the co-toxicity coefficient of different agents proportioning, evaluate the synergy situation of different ratio, determine promazine Sulfometuron Methyl and flucetosulfuron optimum activity ratio.

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 acrial part weeds fresh weight;

T---process weeds acrial 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 herbicide ₅₀, unit is a gram per hectare (g a.i./hm ²);

The ED of M---mixture ₅₀, unit is a gram per hectare (g a.i./hm ²).

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 and flucetosulfuron mixture water prevention weeds in paddy field pondweed virulence

Table 2 promazine Sulfometuron Methyl and flucetosulfuron mixture water prevention weeds in paddy field Paspalum distichum virulence

Table 3 promazine Sulfometuron Methyl and flucetosulfuron mixture water prevention weeds in paddy field difformed galingale herb virulence

Table 4 promazine Sulfometuron Methyl and flucetosulfuron mixture water prevention weeds in paddy field flat stalk Fischer grass virulence

Toxicity Determination result shows, promazine Sulfometuron Methyl and flucetosulfuron are mixed in the scope of weight ratio 3:80 ~ 768:5 shows as addition or synergistic effect to weeds, mixed in the scope of weight ratio 3:20 ~ 192:5 have good synergistic effect, mixed in the scope of weight ratio 3:5 ~ 48:5 have obvious synergistic effect, expand control of weeds spectrum, reach the object of simultaneously preventing and kill off grass family, broad-leaved and sedge weed.

Raw survey embodiment 2

Promazine Sulfometuron Methyl and the composite cauline leaf process of flucetosulfuron are tested the Security test of paddy rice

In order to study promazine Sulfometuron Methyl and the composite cauline leaf process of flucetosulfuron to the safety of paddy rice, for the rational mixture of promazine Sulfometuron Methyl and flucetosulfuron provides scientific basis, inventor has done following test, test tests criterion-weed killer herbicide with reference to People's Republic of China (PRC) agricultural industry criteria NY/T 1155.8-2007 farm-chemical indoor determination, the 8th part: the safety testing cauline leaf spray-on process of crop.

1, experimental condition

1.1 for studying thing

Paddy rice

1.2 for examination weeds

Barnyard grass

1.3 reagent agent

Promazine Sulfometuron Methyl

Flucetosulfuron

2, try material to prepare

2.1 for studying thing

Adopt greenhouse pot culture method for the cultivation studying thing, by 18 × 14cm plastic basin, put in shallow-water tank, by air-dry for the soil adopted back in the farmland not using weed killer herbicide, after sieving, fill basin, quantitative 4/5 place of dry ground in basin, P in soil H value 7.0, the content of organic matter 1.2%.Adopt infiltrating irrigation mode bottom basin alms bowl, after making soil completely moistening, rice paddy seed is quantitatively broadcasted sowing in soil surface, earthing 1.0cm, indoor temperature 28 ~ 32 DEG C/18 ~ 25 DEG C (d/n), relative moisture 75% ± 15%.In incubation with the irrigation method moisturizing of basin alms bowl top 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, and by 18 × 14cm plastic basin, put in shallow-water tank, by not using, the soil adopted back in the farmland of weed killer herbicide was air-dry, filled basin after sieving, quantitative 4/5 place of dry ground in basin, P in soil H value 7.0, the content of organic matter 1.2%.Adopt infiltrating irrigation mode bottom basin alms bowl, after making soil completely moistening, quantitatively broadcast sowing pretreated in soil surface for examination weed seed, earthing 2mm, indoor temperature 28 ~ 32 DEG C/18 ~ 25 DEG C (d/n), relative moisture 75% ± 15%.With infiltrating irrigation mode moisturizing bottom basin alms bowl, keep soil fully moistening, after barnyard grass is emerged, every basin is decided to be 10 strains.

3, experimental scheme

3.1 weeds dispenser dosage

36 process are established in test altogether, wherein promazine Sulfometuron Methyl establish 20,30,40,50,60g a.i./hm ²5 dosage process, flucetosulfuron establishes 10,15,20,25,30g a.i./hm ²5 dosage process.Promazine Sulfometuron Methyl+both flucetosulfurons are mixed establishes 5 assembly than process: 3:20,3:5,12:5,48:5,192:5, dosage is 10,15,20,25,30g a.i./hm ², separately establish 1 clear water contrast, amount to 36 process, repeat 4 times.

3.2 crop dispenser dosage

36 process are established in test altogether, wherein promazine Sulfometuron Methyl establish 60,90,120,150,180g a.i./hm ²5 dosage process, flucetosulfuron establishes 30,45,60,75,90g a.i./hm ²5 dosage process.Promazine Sulfometuron Methyl+both flucetosulfurons are mixed establishes 5 assembly than process: 3:20,3:5,12:5,48:5,192:5, dosage is 60,90,120,150,180g a.i./hm ², separately establish 1 clear water contrast, amount to 36 process, repeat 4 times.

4, application method

The dispenser time limit carries out cauline leaf spraying process when fixing on paddy rice 3 ~ 4 leaf phase, weeds 2.5 ~ 5 leaf phase, be placed in spray medicine (ASS-4 type pesticide spraying system, DG8003 shower nozzle, atomisation pressure 2.75MPA in tower, spouting liquid 30Kg/ mu), treat that natural air drying is placed in greenhouse to cultivate and observe.

5, data survey and statistical analysis

5.1 crop investigation

After dispenser, investigate each process paddy rice with or without symptom of chemical damage, if having, record symptom of chemical damage in detail, within after medicine 20 days, weigh each process paddy rice fresh weight, calculate fresh weight inhibition, with the safety of clear and definite test medicine to paddy rice.

5.2 weedy rices

The damage symptoms (as growth inhibition, chlorosis, deformity etc.) of detailed record weeds after dispenser, after medicine 20 days, weighs each process weeds acrial part fresh weight, the fresh weight preventive effect of employing growth inhibition assay calculating 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 (%);

T ₀-contrast weeds acrial part fresh weight, unit is gram;

T ₁-process weeds acrial part 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 mixtures' ratio different from flucetosulfuron is to the preventive effect of barnyard grass

Table 6 promazine Sulfometuron Methyl mixtures' ratio different from flucetosulfuron is to the safety of paddy rice

Table 7 promazine Sulfometuron Methyl mixtures' ratio different from flucetosulfuron is to the selectivity index of 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 analysis and DPS data handling system [M] thereof. Beijing: Science Press, 2002.188-201) calculate.

When selectivity index >=4, represent that the selectivity of medicament between crops and weeds is very high, as 2≤selectivity index < 4, represent that medicament has selectivity between crops and weeds, as selectivity index < 2, represent the poor selectivity of medicament between crops and weeds.Show the Security test test of paddy rice, promazine Sulfometuron Methyl and the flucetosulfuron mixed selectivity index to paddy rice in the scope of weight ratio 3:20 ~ 192:5 is greater than 2, to rice safety.

Raw survey embodiment 3

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

1, test process

(1) 10% promazine Sulfometuron Methyl flucetosulfuron wetting powder (3:20) 57g/ mu

(2) 10% promazine Sulfometuron Methyl flucetosulfuron wetting powder (3:5) 57g/ mus

(3) 10% promazine Sulfometuron Methyl flucetosulfuron wetting powder (12:5) 57g/ mus

(4) 10% promazine Sulfometuron Methyl flucetosulfuron wetting powder (48:5) 57g/ mus

(5) 10% promazine Sulfometuron Methyl flucetosulfuron wetting powder (192:5) 57g/ mus

(6) 10% promazine Sulfometuron Methyl suspending agent 57g/ mus

(7) 10% flucetosulfuron wetting powder 57g/ mus

(8) blank

7 process are established in test, repeat for 4 times, totally 28 process communities, and often process plot area 20 square metres, random district group arranges.(1) ~ (5) 10% promazine Sulfometuron Methyl flucetosulfuron wetting powder is reagent agent, and 10% promazine Sulfometuron Methyl suspending agent and 10% flucetosulfuron wetting powder are contrast medicament.Every mu is watered 30 kilograms, adopts 552 third type sprayers (0.7mm aperture) even spraying.Field main weeds has pondweed, Paspalum distichum, wild water chestnut, difformed galingale herb, flat stalk Fischer grass, needle spikesedge herb etc.

2, pilot project and method

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

(2) herbicidal effect: every community gets 4 points at random, investigates 1/4 square metre at often, and after dispenser, 20 days investigation weed control efficacies, record weeds kind and strain number respectively, calculate weeds strain preventive effect.

(3) result of the test

Safety: dispenser " Invest, Then Investigate ", chemicals treatment district Plant Height of Rice, Ye Se and blank district are basically identical, show that reagent agent (1) ~ (5) 10% promazine Sulfometuron Methyl flucetosulfuron wetting powder is all to rice safety.

Herbicidal effect: in table 8

20 days various weed control efficacies after table 8 medicine

Note: (1) 10% promazine Sulfometuron Methyl flucetosulfuron wetting powder (3:20)

(2) 10% promazine Sulfometuron Methyl flucetosulfurons wetting powder (3:5)

(3) 10% promazine Sulfometuron Methyl flucetosulfurons wetting powder (12:5)

(4) 10% promazine Sulfometuron Methyl flucetosulfurons wetting powder (48:5)

(5) 10% promazine Sulfometuron Methyl flucetosulfurons wetting powder (192:5)

(6) 10% promazine Sulfometuron Methyl suspending agents

(7) 10% flucetosulfuron wetting powders

(8) blank

As shown in Table 8,10% promazine Sulfometuron Methyl flucetosulfuron wetting powder of different ratio between 80.87% ~ 96.59%, is all better than contrast medicament 10% promazine Sulfometuron Methyl suspending agent and 10% flucetosulfuron wetting powder (weeds strain preventive effect is respectively 62.42% and 59.67%) to common weed strain preventive effect.All have obvious preventive effect to paddy field common weed when wherein promazine Sulfometuron Methyl flucetosulfuron weight ratio is 3:20 ~ 192:5, weeds strain preventive effect is all more than 80%; All better to paddy field common weed preventive effect when promazine Sulfometuron Methyl flucetosulfuron weight ratio is 3:5 ~ 48:5, weeds strain preventive effect is all more than 91%; And promazine Sulfometuron Methyl flucetosulfuron weight ratio when being 12:5 preventive effect especially up to 96.59%.Illustrate thus, promazine Sulfometuron Methyl flucetosulfuron weight ratio, within the scope of 3:20 ~ 192:5, have preventive effect, and this herbicidal composition is to rice safety to the common grassy weed of paddy field, broad leaved weed and sedge weed.

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

1, test process

(1) 5% promazine Sulfometuron Methyl flucetosulfuron wetting powder (12:5) 114g/ mu

(2) 10% promazine Sulfometuron Methyl flucetosulfuron wetting powder (12:5) 57g/ mus

(3) 50% promazine Sulfometuron Methyl flucetosulfuron wetting powder (12:5) 11.4g/ mus

3 process are established in test, repeat for 4 times, totally 12 process communities, and often process plot area 20 square metres, random district group arranges.(1) ~ (3) promazine Sulfometuron Methyl flucetosulfuron wetting powder is reagent agent, and every mu is watered 30 kilograms, adopts 552 third type sprayers (0.7mm aperture) even spraying.Field main weeds has pondweed, Paspalum distichum, wild water chestnut, difformed galingale herb, flat stalk Fischer grass, needle spikesedge herb etc.

2, pilot project and method

Herbicidal effect: every community gets 4 points at random, investigates 1/4 square metre at often, and after dispenser, 20 days investigation weed control efficacies, record weeds kind and strain number respectively, calculate weeds strain preventive effect.

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

20 days various weed control efficacies after table 9 medicine

Note: (1) 5% promazine Sulfometuron Methyl flucetosulfuron wetting powder (12:5)

(2) 10% promazine Sulfometuron Methyl flucetosulfurons wetting powder (12:5)

(3) 50% promazine Sulfometuron Methyl flucetosulfurons wetting powder (12:5)

As shown in Table 9, when the weight ratio of promazine Sulfometuron Methyl and flucetosulfuron is 12:5, the promazine Sulfometuron Methyl flucetosulfuron wetting powder of different content to common weed strain preventive effect all more than 95%, when showing that promazine Sulfometuron Methyl and flucetosulfuron weight ratio are optimal proportion, the herbicidal composition of different activities component content all has significant preventive effect to paddy field weed.

In sum, instant component is reasonable, preventive effect is better than activity when each component is used separately, good preventive effect is all had to grassy weed, broad leaved weed and sedge weed, expand control of weeds spectrum, delay the generation of herbicide resistance, to crop safety, meet the security requirement of pesticidal preparations.

Claims (6)

1., containing the herbicidal composition of flucetosulfuron, it is characterized in that said composition with promazine Sulfometuron Methyl and flucetosulfuron for active ingredient, active ingredient weight ratio is: promazine Sulfometuron Methyl: flucetosulfuron=3:20-192:5.

2. herbicidal composition according to claim 1, is characterized in that active ingredient weight ratio is: promazine Sulfometuron Methyl: flucetosulfuron=3:5-48:5.

3. herbicidal composition according to claim 2, is characterized in that active ingredient weight ratio is: promazine Sulfometuron Methyl: flucetosulfuron=12:5.

4. the herbicidal composition according to any one of claim 1-3, is characterized in that the weight percentage of active ingredient in herbicidal composition is 5-80%.

5. herbicidal composition according to claim 1, is characterized in that said composition can be any one formulation agriculturally allowed.

6. herbicidal composition according to claim 1, is characterized in that for preventing and kill off paddy field weed.