CN104186516A - Pyribenzoxim-containing paddy field herbicide composition - Google Patents
Pyribenzoxim-containing paddy field herbicide composition Download PDFInfo
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- CN104186516A CN104186516A CN201410401748.2A CN201410401748A CN104186516A CN 104186516 A CN104186516 A CN 104186516A CN 201410401748 A CN201410401748 A CN 201410401748A CN 104186516 A CN104186516 A CN 104186516A
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Abstract
The invention discloses a herbicide for preventing and controlling paddy field weeds. The herbicide is a binary herbicide composition which comprises promazine sulfometuron methyl and pyribenzoxim, wherein the promazine sulfometuron methyl and the pyribenzoxim are taken as active components; the weight ratio of the promazine sulfometuron methyl and the pyribenzoxim in the binary herbicide composition is 1:10-128:5, the mass percentage of the promazine sulfometuron methyl and the pyribenzoxim accounts for 5%-80% of the compound herbicide. Compared with the independent use of a single agent, the herbicide composition disclosed by the invention can not only obviously enhance the weeding effect and enlarge the weed control spectrum, but also reduce the generation of weed drug resistance, decreases the herbicide application times, reduces the prevention and control cost, has good environmental compatibility and thus is a more ideal novel composition medicament for preventing and controlling the paddy field weeds.
Description
[technical field]
The invention belongs to pesticidal preparations field, be specifically related to a kind of herbicidal composition that promazine Sulfometuron Methyl and pyribenzoxim be active ingredient of take, be applied to paddy field management of weeds.
[background technology]
Paddy rice is one of world's staple food crop, and nearly half population all be take rice as food in the world, produce and spread all over each continent except the Antarctic Continent, but weeds in paddy field is a key factor that affects rice yield always.Paddy field weeding is a great problem in Rice Production, and chemical method weeding is the Main Means of controlling weeds, the use of weed killer herbicide not only can be saved large quantities of labours, be raised labour productivity, and can make weeds between seedling that large quantities of machinery is difficult to remove be removed, therefore, the research of chemical herbicide and application are more and more subject to people's attention, and the sales volume of chemical herbicide proportion in pesticide producing amount increases year by year, use the area of weed killer herbicide also in continuous expansion.At present, paddy field application more be older sulfonylurea selectivity inner-adsorption conduction-type herbicide, but due to for a long time, in the use of paddy field, cause occurring some difficult problems in application process, wherein the most outstanding is its residual poisoning and the pesticide resistance problem of weeds to sulfonylurea herbicide.Therefore, be badly in need of the weed killer herbicide of a kind of efficient control weeds in paddy field of research and development, in order to the day by day serious weeds harm of reply.
Promazine Sulfometuron Methyl is the pyrimidine radicals sulfonylurea selectivity broad-spectrum herbicide by the exploitation of SUMITOMO CHEMICAL chemistry, 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 as poor in the preventive effect of needle spikesedge herb, difformed galingale herb, flat stalk Fischer grass etc. to part sedge weed.
Pyribenzoxim is a kind of efficient selective pyrimidine ether weed killer herbicide, it is acetolactate synthestase (ALS) inhibitor, through cauline leaf, absorb, in plant corpus, conduct, affect the activity of acetolactate synthestase, suppress sensitive plant amino acid whose synthetic, weeds absorb after medicament, young shoot and root stop growing, and tender tissue turns to be yellow as lobus cardiacus, and then whole strain is withered.Can be used for paddy rice and wheat paddock postemergence weed control, to crop safety, paddy field grassy weed, nutgrass flatsedge and part broad leaved weed are all had to good preventive effect.But because pyribenzoxim is used for many years continuously, part weeds produce resistance to it, and preventive effect obviously declines.
By pertinent literature, retrieve discovery, domestic existing and promazine Sulfometuron Methyl, the patent documentation that pyribenzoxim is relevant, as 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 as poor in the preventive effect of needle spikesedge herb, difformed galingale herb etc. to part sedge weed; Patent CN103271061A discloses pyribenzoxim and the composite herbicidal composition of pyrazosulfuron, and the poor stability of said composition to crop, need to add safener to improve safety.
Promazine Sulfometuron Methyl and pyribenzoxim all can be prevented and kill off grassy weed, but the defect separately of preventing and kill off to broad leaved weed and sedge weed.In order to make up above each single dose and to have reported the deficiency that complex preparation exists in actual application, the inventor furthers investigate, unexpected discovery on the basis of a large amount of formula indoor screenings and field control effectiveness test, promazine Sulfometuron Methyl and pyribenzoxim are composite in certain ratio range, paddy field weed is had to good control efficiency, the preventive effect showing and activity level exceed the stack of each component, there is unforeseeable synergistic function, having solved above two kinds of weed killer herbicides composes in herbicide, preventive effect, the limitation existing in safety, reached expansion herbicide spectrum, improve preventive effect, improve the object of safety.
[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 a kind of efficient, low toxicity, broad weed-killing spectrum to be conducive to the herbicidal composition of the paddy field weed comprehensive regulation.
The present invention has adopted following technical scheme: a kind of herbicidal composition, two kinds of active components of the promazine Sulfometuron Methyl that comprises effective dose and pyribenzoxim.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 of 2-[1,2-b] pyridazine-3-base sulfonyl)-3-(4,6-dimethoxypyridin-2-yl) urea, structural formula is:
Pyribenzoxim (Pyribenzoxim), other titles: Han Letian, molecular formula is: C
32h
27n
5o
8, chemical name: O-[2, two [(4, the 6-dimethoxy-2-pyrimidine radicals) oxygen base] benzoyls of 6-] and diphenyl-ketoxime, structural formula is:
In described herbicidal composition, the mass ratio of active ingredient promazine Sulfometuron Methyl and pyribenzoxim is promazine Sulfometuron Methyl: pyribenzoxim=1:10～128:5, be preferably 2:5～32:5,8:5 more preferably, the percentage composition of two active components in herbicidal composition is 5～80%.
Herbicidal composition of the present invention is except two kinds of active ingredients, can also add the upper auxiliary agent allowing of the agriculturals such as carrier, dispersant, wetting agent, thickener, adhesive, the multiple formulation that is processed into the applicable agricultural uses such as water dispersible granules, wetting powder, granule according to the method for well known to a person skilled in the art, preferred dosage form is water dispersible granules.
As preferably, water dispersible granules of the present invention is adjuvant used to be comprised: dispersant can be selected from one or more in polycarboxylate, lignosulfonates, alkylnaphthalene sulfonate, alkylphenol polyoxyethylene, alkyl polyoxyethylene ether sulfonate; Wetting agent can be selected from one or more in naphthalene sulfonate, lauryl sodium sulfate, sorbitan fatty acid ester polyoxyethylene ether, alkylsulfonate; Disintegrant can be selected from one or more in ammonium sulfate, urea, starch and derivative thereof, low-substituted hydroxypropyl cellulose, polyvinylpyrrolidone, sodium alginate; Adhesive can be selected from one or more in hydroxyethylcellulose, soluble starch, polyethylene glycol, methylcellulose, polycarboxylic acid and water-soluble high-molecular compound sodium carboxymethylcellulose, polyvinyl alcohol; Carrier can be selected from one or more in white carbon, kaolin, bentonite, precipitated calcium carbonate, gypsum, attapulgite, urea, sucrose.
As preferably, wetting powder of the present invention is adjuvant used to be comprised: dispersant can be selected from one or more in lignosulfonates, polycarboxylate, alkylnaphthalene sulfonate, neopelex, alkyl polyoxyethylene ether sulfonate, alkylphenol-polyethenoxy base ether formaldehyde condensation products; Wetting agent can be selected from one or more in lauryl sodium sulfate, Teepol, fatty alcohol-polyoxyethylene ether, polyoxyethylene nonylphenol ether, sorbitan fatty acid ester APEO; Carrier can be selected from one or more in kaolin, diatomite, attapulgite, bentonite, white carbon.
As preferably, granule of the present invention is adjuvant used to be comprised: dispersant can be selected from one or more in alkylnaphthalene sulfonate, dispersant NNO, lignosulfonates, alkylbenzenesulfonate, alkyl ethyl sulfonate, polycarboxylate; Adhesive can be selected from one or more in paraffin, gypsum, hydroxypropyl methylcellulose, polyacrylamide, polyethylene glycol, polyvinyl alcohol; Disintegrant can be selected from one or more in calcium chloride, sodium chloride, magnesium chloride, aluminium chloride; Carrier can be selected from one or more in ammonium sulfate, urea, potassium dihydrogen phosphate, superphosphate, diatomite, white carbon, precipitated calcium carbonate, talcum powder, attapulgite, potter's clay.
Herbicidal composition of the present invention is mainly used in preventing and kill off paddy field weed, and compared with prior art, the present invention possesses following beneficial effect:
1, herbicidal composition provided by the invention, expanded herbicide spectrum, in certain ratio range, shown synergistic function, the control efficiency of composition has had and has significantly improved than single dose, reduce the using dosage of agricultural chemicals, reduced drug cost and the agricultural chemicals adverse effect to ecotope.
2, herbicidal composition provided by the invention, easy to use, time saving and energy saving, and can reduce the resistance risk that long-term use single herbicide produces, and extends the service life of medicament, and 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 under the prerequisite that does not injure crop, kill various weeds, safer to crop.
[embodiment]
In order to make object of the present invention, technical scheme and advantage clearer, the present invention describes with following specific embodiment, but only limits to this absolutely not.The following stated is the good embodiment of the present invention; only for describing the present invention; can not be interpreted as limitation of the present invention, it should be noted that any modification of making within the spirit and principles in the present invention, be equal to and replace and improve, within all should being included in protection scope of the present invention.
FORMULATION EXAMPLE 1:65% promazine Sulfometuron Methyl pyribenzoxim water dispersible granules
Take 40% promazine Sulfometuron Methyl, 25% pyribenzoxim, 5% polycarboxylate, 2% alkylsulfonate, 2% polyvinylpyrrolidone, 1% polyethylene glycol, attapulgite complements to 100%, often regulation is for the method for water dispersible granules, i.e. front mixing, air-flow crushing, rear mixing, add water kneading, granulation, screening, obtain 65% promazine Sulfometuron Methyl pyribenzoxim water dispersible granules.
FORMULATION EXAMPLE 2:28% promazine Sulfometuron Methyl pyribenzoxim water dispersible granules
Take 8% promazine Sulfometuron Methyl, 20% pyribenzoxim, 4% alkylphenol polyoxyethylene, 2% naphthalene sulfonate, 1% sodium alginate, 0.5% hydroxyethylcellulose, bentonite complements to 100%, often regulation is for the method for water dispersible granules, i.e. front mixing, air-flow crushing, rear mixing, add water kneading, granulation, screening, obtain 28% promazine Sulfometuron Methyl pyribenzoxim water dispersible granules.
FORMULATION EXAMPLE 3:37% promazine Sulfometuron Methyl pyribenzoxim wetting powder
Take 32% promazine Sulfometuron Methyl, 5% pyribenzoxim, 2% lauryl sodium sulfate, 3% sodium lignin sulfonate, 5% white carbon, kaolin and complement to 100%, often regulation is for the method for wetting powder, i.e. front mixing, air-flow crushing, rear mixing, obtain 37% promazine Sulfometuron Methyl pyribenzoxim wetting powder.
FORMULATION EXAMPLE 4:22% promazine Sulfometuron Methyl pyribenzoxim wetting powder
Take 2% promazine Sulfometuron Methyl, 20% pyribenzoxim, 3% alkylnaphthalene sulfonate, 4% fatty alcohol-polyoxyethylene ether, kaolin complements to 100%, often regulation is for the method for wetting powder, i.e. front mixing, air-flow crushing, rear mixing, obtain 22% promazine Sulfometuron Methyl pyribenzoxim wetting powder.
FORMULATION EXAMPLE 5:13.3% promazine Sulfometuron Methyl pyribenzoxim granule
Take 12.8% promazine Sulfometuron Methyl, 0.5% pyribenzoxim, 8% lignosulfonates, 2% polycarboxylate, 1% polyethylene glycol, 2% sodium chloride, 5% white carbon, 20% sodium sulphate, ammonium sulfate and complement to 100%, often regulation is front mixing, air-flow crushing, rear mixing, adds water kneading, granulation, screening for the method for granule, obtains described 13.3% promazine Sulfometuron Methyl pyribenzoxim granule.
FORMULATION EXAMPLE 6:48% promazine Sulfometuron Methyl pyribenzoxim granule
Take 8% promazine Sulfometuron Methyl, 40% pyribenzoxim, 12% alkylbenzenesulfonate, 4% polyacrylamide, 2% magnesium chloride, 15% white carbon, 5% urea, diatomite and complement to 100%, often regulation is front mixing, air-flow crushing, rear mixing, adds water kneading, granulation, screening for the method for granule, obtains described 48% promazine Sulfometuron Methyl pyribenzoxim granule.
The raw embodiment 1 that surveys
Promazine Sulfometuron Methyl and pyribenzoxim cauline leaf are processed synergy toxicity determination test
In order to prevent and treat paddy field grassy weed, broad leaved weed and the sedge weed in agricultural production, inventor has studied the herbicidal effect of promazine Sulfometuron Methyl and pyribenzoxim binary built, and evaluate the synergy type of the two different proportion after mixed by the abundant method of Sun Yun, for the rational mixture of promazine Sulfometuron Methyl and pyribenzoxim 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
Wild water chestnut, angustifolia arrowhead herb, needle spikesedge herb, difformed galingale herb;
1.2 reagent agent
Promazine Sulfometuron Methyl
Pyribenzoxim
2, examination material is prepared
Cultivation for examination weeds adopts potted plant cultivation.By 18 * 14cm plastic basin, by the farmland of not using weed killer herbicide adopt the soil of returning air-dry, fill basin after sieving, in basin dry ground quantitatively to 4/5 place of plastic basin, P in soil H value 7.0, the content of organic matter 1.2%.Adopt basin alms bowl bottom infiltrating irrigation mode, make soil completely moistening.Then will evenly be sowed at soil surface through the pretreated needle spikesedge herb of vernalization, difformed galingale herb seed broadcasting, every basin is broadcast 30～40, earthing 1～2mm, and wild water chestnut, 15 earthing 0.5～1cm of the every basin of angustifolia arrowhead herb stem tuber, be 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 processing are established in this test altogether, wherein promazine Sulfometuron Methyl establish 20,35,50,65,80g a.i./hm
25 dosage are processed, and pyribenzoxim establishes 12,21,30,39,48g a.i./hm
25 dosage are processed.The two mixed establishes 7 assembly than processing promazine Sulfometuron Methyl+pyribenzoxim: 1:40,1:10,2:5,8:5,32:5,128:5,512:5, dosage is 12,21,30,39,48g a.i./hm
2, separately establish 1 clear water contrast, amount to 46 processing, repeat 4 times.
4, application method
The dispenser time limit fixes on weeds 2.5～5 leaves and during the phase, carries out cauline leaf spraying processing, is placed in spray medicine (ASS-4 type pesticide spraying system, DG8003 shower nozzle, atomisation pressure 2.75MPA, spouting liquid 30Kg/ mu) in tower, treats that natural air drying is placed on cultivation in greenhouse and observes.
5, data survey and statistical analysis
After dispenser, record in detail the symptom of being injured of weeds, process latter 20 days, carry out fresh weight measurement, and compare with control treatment, calculate weeds fresh weight preventive effect.By the probability value of preventive effect and the linear regression analysis between the logarithm value of series concentration, calculate the ED that each is processed
50and correlation coefficient, to evaluate each and process the biologically active to weeds, the abundant method of utilization Sun Yun calculates the co-toxicity coefficient of different medicament proportionings, evaluates the synergy situation of different proportionings, determines promazine Sulfometuron Methyl and pyribenzoxim optimum activity ratio.
The abundant method computing formula of Sun Yun:
In formula: E---fresh weight preventive effect;
C---contrast weeds acrial part weeds fresh weight;
T---process weeds acrial part weeds fresh weight.
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 (%);
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 pyribenzoxim are mixed and prevent and treat the wild water chestnut virulence of paddy field weed
Table 2 promazine Sulfometuron Methyl and pyribenzoxim are mixed and prevent and treat paddy field weed angustifolia arrowhead herb virulence
Table 3 promazine Sulfometuron Methyl and pyribenzoxim are mixed and prevent and treat paddy field weed needle spikesedge herb virulence
Table 4 promazine Sulfometuron Methyl and pyribenzoxim are mixed and prevent and treat paddy field weed difformed galingale herb virulence
Toxicity Determination result shows, promazine Sulfometuron Methyl shows as and is added or synergistic effect weeds with pyribenzoxim is mixed in the scope of weight ratio 1:40～512:5, in the scope of weight ratio 1:10～128:5, use with and have good synergistic effect, in the scope of weight ratio 2:5～32:5, use with and have obvious synergistic effect, expanded herbicide spectrum, make mixture except preventing and kill off the grassy weeds such as barnyard grass, broad leaved weed and sedge weed are also had to good preventive effect, reached the object of simultaneously preventing and kill off the various weeds of paddy field.
The raw embodiment 2 that surveys
The composite cauline leaf of promazine Sulfometuron Methyl and pyribenzoxim is processed the Security test test to paddy rice
In order to study the composite cauline leaf of promazine Sulfometuron Methyl and pyribenzoxim, process the safety to paddy rice, for the rational mixture of promazine Sulfometuron Methyl and pyribenzoxim provides scientific basis, inventor has done following test, test is with reference to the agricultural industry criteria NY/T 1155.8-2007 of People's Republic of China (PRC) farm-chemical indoor determination experiment criterion-weed killer herbicide, 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
Pyribenzoxim
2, examination material is prepared
2.1 for studying thing
For the cultivation that studies thing, adopt greenhouse pot culture method, by 18 * 14cm plastic basin, put in shallow-water tank, the soil of adopting back in not using the farmland of weed killer herbicide is air-dry, after sieving, fill basin, dry ground is quantitatively to 4/5 place of plastic basin in basin, P in soil H value 7.0, the content of organic matter 1.2%.Adopt basin alms bowl bottom infiltrating irrigation mode, after making soil completely moistening, rice paddy seed is quantitatively broadcasted sowing in soil surface to earthing 1.0cm, 28～32 ℃/18～25 ℃ of indoor temperatures (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, by 18 * 14cm plastic basin, puts in shallow-water tank, by using, the soil of adopting back in the farmland of weed killer herbicide was not air-dry, after sieving, filled basin, and dry ground is quantitatively to 4/5 place of plastic basin in basin, P in soil H value 7.0, the content of organic matter 1.2%.Adopt basin alms bowl bottom infiltrating irrigation mode, after making soil completely moistening, by pretreated, for examination weed seed, quantitatively broadcast sowing in soil surface earthing 2mm, 28～32 ℃/18～25 ℃ of indoor temperatures (d/n), relative moisture 75% ± 15%.With the moisturizing of basin alms bowl bottom infiltrating irrigation mode, 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 processing are established in test altogether, wherein promazine Sulfometuron Methyl establish 20,30,40,50,60g a.i./hm
25 dosage are processed, and pyribenzoxim establishes 5,15,25,35,45g a.i./hm
25 dosage are processed.The two mixed establishes 5 assembly than processing promazine Sulfometuron Methyl+pyribenzoxim: 1:10,2:5,8:5,32:5,128:5, dosage is 5,15,25,35,45g a.i./hm
2, 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 60,90,120,150,180g a.i./hm
25 dosage are processed, and pyribenzoxim establishes 50,75,100,125,150g a.i./hm
25 dosage are processed.The two mixed establishes 5 assembly than processing promazine Sulfometuron Methyl+pyribenzoxim: 1:10,2:5,8:5,32:5,128:5, dosage is 60,90,120,150,180g a.i./hm
2, separately establish 1 clear water contrast, amount to 36 processing, repeat 4 times.
4, application method
The dispenser time limit fixes on 3～4 leaf phases of paddy rice, weeds 2.5～5 leaves carry out cauline leaf spraying and process during the 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 on cultivation in greenhouse and observes.
5, data survey and statistical analysis
5.1 crop investigation
After dispenser, investigation is respectively processed paddy rice and is had or not symptom of chemical damage, if having, records in detail symptom of chemical damage, within after medicine 20 days, weighs and respectively processes paddy rice fresh weight, calculates fresh weight inhibiting rate, the safety 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 20 days, weigh and respectively process weeds acrial part fresh weight, adopt growth inhibition assay to calculate the fresh weight preventive effect of weeds.
5.3 growth inhibition assay computing formula
In formula:
E-fresh weight preventive effect, unit is percentage (%);
T
0-contrast weeds acrial part fresh weight, unit is gram;
T
1-processing weeds acrial part fresh weight, unit is gram.
5.4 selectivity index computational methods
6, results and analysis is in Table 5～7
The preventive effect of table 5 promazine Sulfometuron Methyl mixtures' ratios different from pyribenzoxim to barnyard grass
The safety of table 6 promazine Sulfometuron Methyl mixtures' ratios different from pyribenzoxim to paddy rice
The selectivity index of table 7 promazine Sulfometuron Methyl mixtures' ratios different from pyribenzoxim to paddy rice
Note: in table 7 data be 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) calculates.
When selectivity index >=4, represent that the selectivity of medicament between crops and weeds is very high, when 2≤selectivity index < 4, represent that medicament has selectivity between crops and weeds, when selectivity index < 2, represent the poor selectivity of medicament between crops and weeds.The Security test of paddy rice is tested and shown, promazine Sulfometuron Methyl is greater than 2 with pyribenzoxim mixed selectivity index to paddy rice in the scope of weight ratio 1:10～128:5, 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
7 processing are established in test, repeat for 4 times, process community for totally 28,20 square metres of every processing community areas, and random district group is arranged.(1)～(5) 65% promazine Sulfometuron Methyl pyribenzoxim water dispersible granules is reagent agent, and 10% promazine Sulfometuron Methyl suspending agent and 5% pyribenzoxim missible oil are contrast medicament.Every mu is watered 30 kilograms, adopts 552 third type sprayers (0.7mm aperture) even spraying.Field main weeds has wild water chestnut, angustifolia arrowhead herb, barnyard grass, needle spikesedge herb, difformed galingale herb, flat stalk Fischer grass etc.
2, pilot project and method
(1) safety: after dispenser, the situation of growing of investigation paddy rice, evaluates the safety of reagent agent to paddy rice.
(2) herbicidal effect: every community is got 4 points at random, investigates 1/4 square metre at every, and after dispenser, 20 days investigation weed control efficacies, record respectively weeds kind and strain number, 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) 65% promazine Sulfometuron Methyl pyribenzoxim water dispersible granules is all to rice safety.
Herbicidal effect: in Table 8
20 days various weed control efficacies after table 8 medicine
Note: (1) 65% promazine Sulfometuron Methyl pyribenzoxim water dispersible granules (1:10)
(2) 65% promazine Sulfometuron Methyl pyribenzoxim water dispersible granules (2:5)
(3) 65% promazine Sulfometuron Methyl pyribenzoxim water dispersible granules (8:5)
(4) 65% promazine Sulfometuron Methyl pyribenzoxim water dispersible granules (32:5)
(5) 65% promazine Sulfometuron Methyl pyribenzoxim water dispersible granules (128:5)
(6) 10% promazine Sulfometuron Methyl suspending agents
(7) 5% pyribenzoxim missible oil
(8) blank
As shown in Table 8,65% promazine Sulfometuron Methyl pyribenzoxim water dispersible granules of different proportionings between 82.94%～98.07%, is all better than contrasting medicament 10% promazine Sulfometuron Methyl suspending agent and 5% pyribenzoxim missible oil (weeds strain preventive effect is respectively 61.70% and 72.96%) to common weed strain preventive effect.When wherein promazine Sulfometuron Methyl pyribenzoxim weight ratio is 1:10～128:5, paddy field common weed is had to obvious preventive effect, weeds strain preventive effect is all more than 82%; Better to paddy field common weed preventive effect when promazine Sulfometuron Methyl pyribenzoxim weight ratio is 2:5～32:5, weeds strain preventive effect is all more than 93%; And promazine Sulfometuron Methyl pyribenzoxim weight ratio while being 8:5 preventive effect especially up to 98.07%.Explanation thus, promazine Sulfometuron Methyl pyribenzoxim weight ratio, within the scope of 1:10～128:5, the common grass family of paddy field, broad-leaved and sedge weed are had to preventive effect, and this herbicidal composition is to rice safety.
Prevent and kill off paddy field weed field control effectiveness test II:
1, test is processed
(1) 5% promazine Sulfometuron Methyl pyribenzoxim water dispersible granules (8:5) 130g/ mu
(2) 65% promazine Sulfometuron Methyl pyribenzoxim water dispersible granules (8:5) 10g/ mus
(3) 80% promazine Sulfometuron Methyl pyribenzoxim water dispersible granules (8:5) 8.125g/ mus
3 processing are established in test, repeat for 4 times, process community for totally 12,20 square metres of every processing community areas, and random district group is arranged.(1)～(3) promazine Sulfometuron Methyl pyribenzoxim water dispersible granules is reagent agent, and every mu is watered 30 kilograms, adopts 552 third type sprayers (0.7mm aperture) even spraying.Field main weeds has wild water chestnut, angustifolia arrowhead herb, barnyard grass, needle spikesedge herb, difformed galingale herb, flat stalk Fischer grass etc.
2, pilot project and method
Herbicidal effect: every community is got 4 points at random, investigates 1/4 square metre at every, and after dispenser, 20 days investigation weed control efficacies, record respectively weeds kind and strain number, 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 pyribenzoxim water dispersible granules (8:5)
(2) 65% promazine Sulfometuron Methyl pyribenzoxim water dispersible granules (8:5)
(3) 80% promazine Sulfometuron Methyl pyribenzoxim water dispersible granules (8:5)
As shown in Table 9, when the weight ratio of promazine Sulfometuron Methyl and pyribenzoxim is 8:5, the promazine Sulfometuron Methyl pyribenzoxim water dispersible granules of different content to common weed strain preventive effect all more than 95%, while showing that promazine Sulfometuron Methyl and pyribenzoxim weight ratio are optimal proportion, the herbicidal composition of different activities component content all has significant preventive effect to paddy field weed.
In sum, component of the present invention is reasonable, the activity that preventive effect is better than each component while using separately, grassy weed, broad leaved weed and sedge weed are all had to good preventive effect, expanded control of weeds spectrum, delay the generation of herbicide resistance, to crop safety, met the security requirement of pesticidal preparations.
Claims (6)
1. a herbicidal composition for pyribenzoxim, is characterized in that it is active ingredient that said composition be take promazine Sulfometuron Methyl and pyribenzoxim, and described active ingredient weight ratio is: promazine Sulfometuron Methyl: pyribenzoxim=1:10-128:5.
2. herbicidal composition according to claim 1, is characterized in that active ingredient weight ratio is: promazine Sulfometuron Methyl: pyribenzoxim=2:5-32:5.
3. herbicidal composition according to claim 2, is characterized in that active ingredient weight ratio is: promazine Sulfometuron Methyl: pyribenzoxim=8:5.
4. according to the herbicidal composition described in any one in claim 1-3, it is characterized in that the percentage composition of active ingredient in herbicidal composition is 5-80%.
5. herbicidal composition according to claim 1, is characterized in that said composition can be upper any formulation allowing of agricultural.
6. herbicidal composition according to claim 1, is characterized in that for preventing and kill off paddy field weed.
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| CN104522024A (en) * | 2014-12-22 | 2015-04-22 | 广东中迅农科股份有限公司 | Weed control composition containing propyrisulfuron and pyribenzoxim |
| CN104585208A (en) * | 2014-12-22 | 2015-05-06 | 广东中迅农科股份有限公司 | Herbicide composition of propyrisulfuron, pyribenzoxim and fenoxaprop-P-ethyl |
| CN104663698A (en) * | 2015-02-12 | 2015-06-03 | 海利尔药业集团股份有限公司 | Weeding composition containing pyribenzoxim and propoxycarbazone-sodiurn |
| CN104824001A (en) * | 2015-05-13 | 2015-08-12 | 广东中迅农科股份有限公司 | Herbicidal composition containing propyrisulfuron, cyhalofop-butyl and saflufenacil |
| CN104886099A (en) * | 2015-06-17 | 2015-09-09 | 广东中迅农科股份有限公司 | Weeding composition for rice field |
| GB2534230A (en) * | 2015-01-19 | 2016-07-20 | Rotam Agrochem Int Co Ltd | A herbicidal composition and method of controlling plant growth |
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