CN105580827A - Herbicide composition containing methabenzthiazuron and florasulam - Google Patents

Herbicide composition containing methabenzthiazuron and florasulam Download PDF

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Publication number
CN105580827A
CN105580827A CN201610146011.XA CN201610146011A CN105580827A CN 105580827 A CN105580827 A CN 105580827A CN 201610146011 A CN201610146011 A CN 201610146011A CN 105580827 A CN105580827 A CN 105580827A
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florasulam
methabenzthiazuron
agent
weeds
herbicidal composition
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CN105580827B (en
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高兴祥
李美
李健
房锋
孙作文
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Institute of Plant Protection Shandong Academy of Agricultural Sciences
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Institute of Plant Protection Shandong Academy of Agricultural Sciences
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    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
    • A01N47/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom not being member of a ring and having no bond to a carbon or hydrogen atom, e.g. derivatives of carbonic acid
    • A01N47/08—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom not being member of a ring and having no bond to a carbon or hydrogen atom, e.g. derivatives of carbonic acid the carbon atom having one or more single bonds to nitrogen atoms
    • A01N47/28—Ureas or thioureas containing the groups >N—CO—N< or >N—CS—N<
    • A01N47/36—Ureas or thioureas containing the groups >N—CO—N< or >N—CS—N< containing the group >N—CO—N< directly attached to at least one heterocyclic ring; Thio analogues thereof
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
    • A01N43/00—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds
    • A01N43/90—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having two or more relevant hetero rings, condensed among themselves or with a common carbocyclic ring system

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  • Life Sciences & Earth Sciences (AREA)
  • Agronomy & Crop Science (AREA)
  • Pest Control & Pesticides (AREA)
  • Plant Pathology (AREA)
  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Dentistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Zoology (AREA)
  • Environmental Sciences (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)

Abstract

The invention belongs to the technical field of farm chemical herbicides, and particularly relates to a herbicide composition containing methabenzthiazuron and florasulam. The herbicide composition is suitable for wheat fields. The weight ratio of the active ingredient methabenzthiazuron to the active ingredient florasulam ranges from 25:1 to 1600:1. According to the herbicide composition, the weed control spectrum is broadened, the control effect is enhanced, the situation that the herbicide resistance of weeds can be rapidly generated when weed control is performed with a single herbicide is avoided, generation of the herbicide resistance of weeds is retarded, the dosage is reduced, the use cost is lowered, and environmental pollution is relieved.

Description

A kind of herbicidal composition that contains methabenzthiazuron and florasulam
Technical field
The invention belongs to pesticide herbicide technical field, the one that is specifically related to be applicable to wheatland contain methabenzthiazuron andThe herbicidal composition of florasulam.
Background technology
Wheat is one of China's staple food crop, and its cultivated area and total output are only second to paddy rice, national cultivated areaReach more than 3,000 ten thousand hectares, approximately 4.5 hundred million mu, account for the 22%-30% of national cultivated area, be about the 20%-of cereal crops sown area27%, approximately 100,000,000 tons of wheat total outputs, reach the 22%(Wu Ming honor of total output of grain etc., and 2013, agricultural chemicals). Wheat is that China is mainCommodity food and strategic reserves grain kind, in grain-production, circulation and consumption, there is critical role, development Wheat Production to meState's national economic development and people's lives are significant. According to national weeds reconnaissance information, China's wheat weeds kindHave kind more than 200, crop smothering area accounts for the more than 30% of wheat planting area, and loss accounts for 15% of wheat total output. Therefore wheatlandControl of weeds is one of important process of wheat planting.
Herbicide is the conventional measure of current wheat weeds control, to promoting wheat yield to improve and saving planting cost toolThere is important effect. But long-term, the large scale application of herbicide, there is Weed Resistance, kind in farmland weed chemical controlGroup's succession and drug injury problem are on the rise, and have a strong impact on the high yield of wheat and safety (Wei Youhai, the Hubei of good harvest and succession cropAgricultural sciences, 2011.4). At present, in wheatland there are some drawbacks in conventional medicament. As phonetic in sulfonylurea herbicide tribenuron-methyl, benzylThe grand consumption of sulphur is too high, and late use meeting causes poisoning to succession crop peanut, soybean with mistake. Phenoxy carboxylic acid herbicides 2,4-drips fourthEster, mcpa sodium consumption are too high and use and improperly easily cause chemical injury of crops to produce drift can to produce near dicotyledonous cropsCrude drug evil.
Long-term use single herbicide to prevent and kill off can to cause susceptible weeds quantity to decline, insensitive or malignant weed quantitativelyRise, cause that weed community changes. In the winter wheat producing region of the single use of herbicide, wheat weeds group has occurred seriousChange, the malignant weed that the multiple herbicides such as clearvers, wartwort, grandmother's sodium, shepherd's purse are all difficult to control increases year by year, and serious shadowThe results of wheat crop output are rung.
Florasulam (florasulam) is developed by LG-DOW agricultural sciences (DowAgroscience) companyTriazolopyrimidine sulfonamides herbicide. Chemical name: 2 ', 6 '-bis-fluoro-5-methoxyl group-8-fluorine [1,2,4] triazol [1,5-C] pyrimidine-2-sulfonanilide; 2 ', 6 '-difluoro-5-methoxy-8-fluoro[1,2,4] triazo-lo[1,5-c]Pyrimidine-2-Sulfonanilide; CAS accession number: [145701-23-1]. Florasulam is typical acetolactic acidSynzyme (ALS) inhibitor,, causes to stop the biosynthesis of branched-chain amino acid by the ALS enzymatic activity in inhibition plantThe synthetic of protein is damaged, thereby makes the mitosis of plant cell stop at S phase (DNA synthesis phase) and the G2 in Gl stageThe M phase in stage, disturb the synthetic of DNA, therefore cell can not complete mitosis, and then its this bulk-growth is stopped and deadDie, finally cause plant death. Florasulam is inner-adsorption conduction-type herbicide, can, by plant leaf blade and Root Absorption, divideIn raw tissue, accumulate and make plant progressively dead. Typical poisoning symptom is: leaf chlorosis, albefaction or purpling, internode shortens, topBud death, final complete stool death. This herbicide possesses the advantage of the high broad weed-killing spectrum of biologically active, due to its action target ALS enzymeDo not relate to humans and animals, therefore this kind of herbicide has very high security to humans and animals. Florasulam is mainly used in seedlingRear defence is except winter wheat field broad leaved weed is as clearvers, chickweed, Polygonum weeds, composite family weeds etc., and use amount only effectively becomes for 3-10gPart/hectare [mu consumption is 0.2-0.67g(a.i)]. Florasulam is that the wide spectrum that after seedling, broad leaved weed is prevented and kill off in cauline leaf processing removesGrass chaste tree, per hectare consumption 5g can effectively prevent and kill off China pink material, madder material, Convolvulaceae, Malvaceae, knotweed, and field is important assortedGrass is as very responsive to it in chickweed, clearvers, black nightshade, volume stem knotweed etc. Can prevent and kill off the pig calamity of plant height 20cm with the dosage of 5g/hm2Calamity, 2.5g can prevent and kill off the chickweed of 6 leaf periods, and 5g can prevent and treat fertility (Zhang Meifeng etc., the present such as chickweed and german chamomile in late period completelyDay agricultural chemicals, 2011/7). Song Guochun etc. study discovery, and the half-life of florasulam in wheat plant is respectively 2.0-5.8d,After medicine, 14d clears up more than 82%. The half-life of florasulam in soil is 5.5-9.6d, and after medicine, 21d clears up more than 80% (mountainEast agricultural sciences, 06 phase in 2015). Shandong Agricultural University recent studies have found that, Wheat Cultivars is resistance to florasulamThe property of medicine differs greatly (Liu Gang, pesticide market information, 2012/18 phase), when use, should be noted that.
Methabenzthiazuron, Chinese synonym is: methabenz thiazuron, winter sowing is grand, and section is rather broadcast, first benzthiazuron, methabenzthiazuron, N-2-Benzothiazolyl-N, N'-dimethyl urea; N-2-benzothiazolyl-N, N '-dimethyl urea; 1-(benzothiazole-2-yl)-1,3-Dimethyl urea. English name is Methabenzthiazuron, and English synonym is: s25128, and B-74283, bay74283,TRIBUNIL，Trubunil，BAY-5653，bayer5633，TRIBUNIL(R)，preparation5633，Methbenzthiazuron. CBNumber is CB9197088, is for No. CAS 18691-97-9. Methabenz thiazuron is before a kind of bud, after budWith the broad-spectrum herbicide of preventing and kill off the weeds in wheat class, beans, many unifacial leaves, broadleaf weed are all had to the good work of preventing and kill offWith. Main by root absorption, weeds are dead in 14-20d after dispenser. Phenyl ureagroup herbicides, by suppressing plant photosynthesisHill reaction in crop, reaches weeding object. Cornfield herbicidal dosage 15～22.5g/100m2. Because medicament mainly passes throughRoot absorption, so soil should be moistening when dispenser. Invalid to the weeds that bred by root system. Safer to succession crop. Should not executeFor spring barley. Conventionally water body is harmful to a little, not by undiluted or large-tonnage product contact underground water, water channel or sewageSystem, does not enter surrounding environment by material without governmental approval.
Along with the development of Development of China's Urbanization, rural laborer transfers to cities and towns in a large number, and concentration of landholdings degree improves, wheatlandControl of weeds is more and more stronger to the dependence of herbicide. Efficiently, low toxicity, low-residual, succession crop harm is little is current herbicideThe important directions of research and development.
The deficiency existing in actual application in order to make up above each single dose, the inventor furthers investigate,Unexpected discovery on a large amount of formula indoor screenings and the basis of field control effectiveness test, herbicidal composition of the present invention is necessarily being joinedThan composite in scope, weeds of wheat is had to good prevention effect, the preventive effect showing and activity level exceed each groupThe stack dividing, has unforeseeable synergistic function, has solved above two herbicides in herbicide spectrum, preventive effect and securityThe limitation existing, has reached the object that expands herbicide spectrum, raising preventive effect, raising security, can meet current agricultural to removingThe demand of grass agent.
Summary of the invention
The object of the invention is to the defect for current wheat paddock herbicide, a kind of broad weed-killing spectrum, herbicidal effect are providedGet well, use safety, be conducive to the herbicidal composition of the weeds of wheat comprehensive regulation.
The present invention has adopted following technical scheme:
The present invention relates to a kind of herbicidal composition that contains methabenzthiazuron and florasulam.
Technical solution of the present invention, is characterized in that: the part by weight model of active ingredient methabenzthiazuron and florasulamEnclose for 25:1 is to 1600:1.
The another kind of preferred scheme of the present invention, is characterized in that: the weight of active ingredient methabenzthiazuron and florasulamAmount proportion is that 50:1 is to 800:1.
The another kind of preferred scheme of the present invention, is characterized in that: the weight of active ingredient methabenzthiazuron and florasulamAmount proportion is that 100:1 is to 400:1.
The another kind of preferred scheme of the present invention, is characterized in that: the weight of active ingredient methabenzthiazuron and florasulamAmount ratio position 100:1 or 200:1,300:1,400:1.
The present invention relates to a kind of herbicidal composition preparation, this herbicidal composition preparation is missible oil, aqueous suspension agent, oily outstandingFloating agent, wettable powder, granule or water dispersible granules, herbicidal composition preparation is included on agricultural chemicals acceptable, oneOr be multiplely selected from wetting agent, emulsifying agent, dispersant, thickener, antifreezing agent, disintegrant, binding agent, defoamer, carrier or fillingThe auxiliary agent of agent.
The present invention relates to the purposes of described Herbicidal combinations in control weeds of wheat, described weeds of wheat isWheat paddock broad leaved weed is broadcast the weeds such as ma wormwood artemisia, shepherd's purse, clearvers and grassy weed bromegrass, amur foxtail, hard Cao, Wang grass.
Herbicidal composition of the present invention, except two kinds of active ingredients, can also add carrier, emulsifying agent, dispersant, wettingThe upper auxiliary agent allowing of the agricultural such as agent, disintegrant, thickener, adhesive, is processed into according to the method for well known to a person skilled in the artThe multiple formulation of the applicable agricultural uses such as water dispersible granules, oil-suspending agent, wettable powder, granule.
Emulsifying agent is the compound of one or more anion, non-ionic surface active agent, non-ionic surface active agent asFatty acid esters of sorbitan, alkylphenol-polyethenoxy polyethenoxy ether, polyoxyethylene alkyl amine etc., anion surfactantAs calcium dodecyl benzene sulfonate, neopelex etc., it can be one or more composition wherein. DisperseAgent can be selected from polycarboxylate, lignosulfonates, alkylnaphthalene sulfonate, APES, DBSAOne or more in sodium, alkyl polyoxyethylene ether sulfonate or in alkylphenol-polyethenoxy base ether formaldehyde condensation products; Wetting agentCan be selected from naphthalene sulfonate, lauryl sodium sulfate, Teepol, AEO, Nonyl phenoOne or more in ether, sorbitan fatty acid ester polyoxyethylene ether, alkylsulfonate; Disintegrant can be selected from sulfuric acidAmmonium, urea, starch and derivative thereof, low-substituted hydroxypropyl cellulose, polyvinylpyrrolidone, sodium alginate, calcium chloride, chlorinationOne or more in sodium, magnesium chloride, aluminium chloride; Adhesive can be selected from hydroxyethylcellulose, soluble starch, poly-second twoAlcohol, methylcellulose, polycarboxylic acid and water-soluble high-molecular compound sodium carboxymethylcellulose, polyvinyl alcohol, paraffin, gypsum,One or more in hydroxypropyl methylcellulose, polyacrylamide; Carrier can be selected from white carbon, kaolin, bentonite, lightIn matter calcium carbonate, gypsum, attapulgite, urea, sucrose, diatomite, bentonite, ammonium sulfate, urea, potassium dihydrogen phosphate, potter's clayOne or more.
Beneficial effect:
1. expand the herbicide spectrum of knowing clearly. Methabenzthiazuron is broadcast ma wormwood artemisia, shepherd's purse, clearvers and standing grain originally to weeds of wheat broad leaved weedSection weeds amur foxtail, hard Cao, Wang grass etc. all have good effect, but relatively slightly poor to the weeds such as bromegrass, annual bluegrass effect; Two fluorineSulphur grass amine is broadcast ma wormwood artemisia, clearvers to broad leaved weed all good effect, invalid to grassy weed amur foxtail and hard grass. MethylThe composite rear mutual supplement with each other's advantages of benzthiazuron and florasulam, broadcasts ma wormwood artemisia, shepherd's purse, clearvers and grass family to wheat paddock broad leaved weedWeeds bromegrass, amur foxtail, hard Cao, Wang grass all have good effect.
2. strengthened preventive effect. The composite rear interaction type of methabenzthiazuron and florasulam is addition and has increasingEffect effect, preventive effect strengthens, more effective than alone.
3. avoid use single herbicide to prevent and kill off and can cause Weed Resistance to occur fast, delayed sending out of herbicide resistanceRaw.
4. reduce dosage, reduce use cost, alleviate environmental pollution.
Detailed description of the invention
Below in conjunction with detailed description of the invention, the present invention will be further described, but the present invention should not be construed as and is confined to theseEmbodiment.
Embodiment 1 prepares methabenzthiazuron (200g) and florasulam (1g) aqueous suspension agent
Use the former medicine of 96% methabenzthiazuron (methabenzthiazuron), the former medicine of 94% florasulam (florasulam)Preparation aqueous suspension agent. Take respectively quantitative methabenzthiazuron, the former medicine of florasulam with electronic balance, first add special-purpose emulsifyingAfter agent is dissolved, then add the DMF of 2 times to dissolving completely, be diluted to 1% with 0.1% the Tween-80 aqueous solutionAqueous suspension agent is for subsequent use. Be prepared into active ingredient methabenzthiazuron (200g) and the composite aqueous suspension agent of florasulam (1g).
Embodiment 2 prepares methabenzthiazuron (200g) and the composite aqueous suspension agent of florasulam (2g)
Formulation method, with embodiment 1, takes the former medicine of methabenzthiazuron and florasulam and is prepared.
Embodiment 3 prepares methabenzthiazuron (200g) and the composite aqueous suspension agent of florasulam (4g)
Formulation method, with embodiment 1, takes the former medicine of methabenzthiazuron and florasulam and is prepared.
Embodiment 4 prepares methabenzthiazuron (200g) and the composite aqueous suspension agent of florasulam (8g)
Formulation method, with embodiment 1, takes the former medicine of methabenzthiazuron florasulam and is prepared.
Embodiment 5 prepares methabenzthiazuron (400g) and the composite aqueous suspension agent of florasulam (1g)
Formulation method, with embodiment 1, takes the former medicine of methabenzthiazuron and florasulam and is prepared.
Embodiment 6 prepares methabenzthiazuron (400g) and the composite aqueous suspension agent of florasulam (2g)
Formulation method, with embodiment 1, takes the former medicine of methabenzthiazuron and florasulam and is prepared.
Embodiment 7 prepares methabenzthiazuron (400g) and the composite aqueous suspension agent of florasulam (4g)
Formulation method, with embodiment 1, takes the former medicine of methabenzthiazuron and florasulam and is prepared.
Embodiment 8 prepares methabenzthiazuron (400g) and the composite aqueous suspension agent of florasulam (8g)
Formulation method, with embodiment 1, takes the former medicine of methabenzthiazuron and florasulam and is prepared.
Embodiment 9 prepares methabenzthiazuron (800g) and the composite aqueous suspension agent of florasulam (1g)
Formulation method, with embodiment 1, takes the former medicine of methabenzthiazuron and florasulam and is prepared.
Embodiment 10 prepares methabenzthiazuron (800g) and the composite aqueous suspension agent of florasulam (2g)
Formulation method, with embodiment 1, takes the former medicine of methabenzthiazuron and florasulam and is prepared.
Embodiment 11 prepares methabenzthiazuron (800g) and the composite aqueous suspension agent of florasulam (4g)
Formulation method, with embodiment 1, takes the former medicine of methabenzthiazuron and florasulam and is prepared.
Embodiment 12 prepares methabenzthiazuron (800g) and the composite aqueous suspension agent of florasulam (8g)
Formulation method, with embodiment 1, takes the former medicine of methabenzthiazuron and florasulam and is prepared.
Embodiment 13 prepares methabenzthiazuron (1600g) and the composite aqueous suspension agent of florasulam (1g)
Formulation method, with embodiment 1, takes the former medicine of methabenzthiazuron and florasulam and is prepared.
Embodiment 14 prepares methabenzthiazuron (1600g) and the composite aqueous suspension agent of florasulam (2g)
Formulation method, with embodiment 1, takes the former medicine of methabenzthiazuron and florasulam and is prepared.
Embodiment 15 prepares methabenzthiazuron (1600g) and the composite aqueous suspension agent of florasulam (4g)
Formulation method, with embodiment 1, takes the former medicine of methabenzthiazuron and florasulam and is prepared.
Embodiment 16 prepares (methabenzthiazuron 1600g) and the composite aqueous suspension agent of florasulam (8g)
Formulation method, with embodiment 1, takes the former medicine of methabenzthiazuron and florasulam and is prepared.
Embodiment 17 prepares 50% methyl tribenuron-methyl florasulam (methabenzthiazuron+florasulam)SC(100:1) suspending agent
Take the quantitative former medicine of 96% methabenzthiazuron (methabenzthiazuron), 94% pair of fluorine sulphur according to 100:1 proportioningGrass amine (florasulam) former medicine pulverizes and sieves, add dispersant, thickener, antiprecipitant, defoamer, antifreezing agent andWater, then utilizes wet method to carry out the flowable suspended substance of thickness that ultramicro grinding forms.
Embodiment 18 prepares 50% methyl tribenuron-methyl florasulam (methabenzthiazuron+florasulam)SC(200:1) suspending agent
Take the quantitative former medicine of 96% methabenzthiazuron (methabenzthiazuron), 94% pair of fluorine sulphur according to 200:1 proportioningGrass amine (florasulam) former medicine pulverizes and sieves, add dispersant, thickener, antiprecipitant, defoamer, antifreezing agent andWater, then utilizes wet method to carry out the flowable suspended substance of thickness that ultramicro grinding forms.
Embodiment 19 prepares 50% methyl tribenuron-methyl florasulam (methabenzthiazuron+florasulam)SC(300:1) suspending agent
Take the quantitative former medicine of 96% methabenzthiazuron (methabenzthiazuron), 94% pair of fluorine sulphur according to 300:1 proportioningGrass amine (florasulam) former medicine pulverizes and sieves, add dispersant, thickener, antiprecipitant, defoamer, antifreezing agent andWater, then utilizes wet method to carry out the flowable suspended substance of thickness that ultramicro grinding forms.
Embodiment 20 preparation preparation 50% methyl tribenuron-methyl florasulam (methabenzthiazuron+Florasulam) SC(400:1) suspending agent
Take the quantitative former medicine of 96% methabenzthiazuron (methabenzthiazuron), 94% pair of fluorine sulphur according to 400:1 proportioningGrass amine (florasulam) former medicine pulverizes and sieves, add dispersant, thickener, antiprecipitant, defoamer, antifreezing agent andWater, then utilizes wet method to carry out the flowable suspended substance of thickness that ultramicro grinding forms.
Embodiment 21 laboratory experiments
1) experimental condition
For examination weeds for broadcast ma wormwood artemisia (Descurainiasophia (L.) webb), clearvers (GaliumaparinaL.),Amur foxtail (AlopecurusaequalisSobl..), hard grass (Sclerochloakengiana (Ohwi) Tzvel.). ?There is the cultivation of testing material in the glasshouse of heating installation, 15～25 DEG C of temperature, natural lighting. Broadcast ma wormwood artemisia, pig by quantitativeCalamity calamity, amur foxtail, hard grass seed are sowed in the plastic tub that diameter is 9cm, and weeds earthing 1～2mm, puts into the enamel that water is housedIn dish, allow water infiltrate gradually, wait water to be seeped into be transferred to phjytotron after soil table stand-by.
Within 1～2 day, can not watering after spray medicine, regularly with the moisturizing of bottom infiltrating irrigation mode, to keep soil moisture.
2) experimental design
Reagent agent is the former medicine of 96% methabenzthiazuron (methabenzthiazuron), 94% florasulam(florasulam) aqueous suspension agent in former medicine and embodiment 1～16.
Dosage arranges, and methabenzthiazuron establishes 200,400,800,1600ga.i./ha, florasulam establishes 1,2,4,8ga.i./ha, the composite aqueous suspension agent using dosage of methabenzthiazuron and florasulam is according to the numerical value in embodiment 1～16.
Tested in hard grass, 21 heart stages of leaf of amur foxtail; Broadcast 3～5 leaf phases of ma wormwood artemisia; Clearvers 1～2 is taken turns compound leaf phase cauline leaf and is evenly sprayedMist processing.
Adopt ASS-4 type automatically to control sprinkling system, Fan spray head, in conjunction with sprinkler pressure, flow etc., by actual spray powderLong-pending (1.1m2) spray 50mL liquid (amounting to a mu water consumption 30kg), debug the speed of service, by equal pending plastic tubEven being arranged on spraying platform, even spraying processing. Atomisation pressure 0.4KPa, Fan spray head flow 800mL/min. By low amount extremelyA large amount sprays successively. Every processing repeats 4 times.
3) result of the test is calculated
Synergy type after mixed with the evaluation of Gowing method.
Gowing law theory preventive effect calculating formula is:
E0=X＋Y×（100－X）÷100
In formula, X, Y are respectively the actual measurement preventive effect value (%) of two single doses, and E is the mixed actual measurement preventive effect values (%) of different proportionings, E0ForTheoretical preventive effect value (%). Work as E-E0Be addition, E-E between-10～10 o'clock0> 10 o'clock be synergistic effect, E-E0<-10 o'clockFor antagonism.
Table 1 methabenzthiazuron and florasulam mixture synergy laboratory experiment
As shown in Table 1, methabenzthiazuron to weeds of wheat broadcast ma wormwood artemisia, amur foxtail, hard grass has good effect, to clearvers alsoThere is certain preventive effect; Florasulam is broadcast ma wormwood artemisia, clearvers to broad leaved weed all good effect, and grassy weed is seen to wheatMa and hard grass are invalid.
As shown in Table 1, methabenzthiazuron and florasulam are composite rear to broadcasting the increase of ma wormwood artemisia effect, and E-E0 value, for just, is shownIt is now addition. When part by weight is 400:1, E-E0 value is up to 2.4, be secondly part by weight while being 200:1 E-E0 value be2.2, be again part by weight while being 100:1 E-E0 value be 2.1. Can know methabenzthiazuron and florasulam part by weight25:1 is to increasing broadcasting ma wormwood artemisia effect between 1600:1, secondly for 50:1 is to 800:1, optimum for 100:1 is to 400:1.
As shown in Table 1, methabenzthiazuron and florasulam are composite rear to the increase of clearvers effect, and E-E0 value, for just, is shownBe now addition or synergy. When part by weight is 200:1, E-E0 value is up to 10.1, is secondly that part by weight is while being 400:1E-E0 value is 6.8, be again part by weight while being 100:1 E-E0 value be 5.6. Can know methabenzthiazuron and florasulamPart by weight 25:1 is to increasing broadcasting ma wormwood artemisia effect between 1600:1, and secondly, for 50:1 is to 800:1, optimum is 100:1 to 200:1。
As shown in Table 1, methabenzthiazuron and florasulam are composite rear to the increase of amur foxtail effect, and E-E0 value, for just, is shownIt is now addition. When part by weight is 200:1, E-E0 value is up to 5.7, be secondly part by weight while being 400:1 E-E0 value be4.1, be again part by weight while being 100:1 E-E0 value be 4. Can know methabenzthiazuron and florasulam part by weight25:1 is to increasing broadcasting ma wormwood artemisia effect between 1600:1, secondly for 50:1 is to 800:1, optimum for 200:1 is to 400:1.
As shown in Table 1, methabenzthiazuron and florasulam are composite rear to hard careless effect increase, and E-E0 value, for just, showsFor addition or synergistic effect. When part by weight is 100:1, effect is best, and E-E0 value is 10.2, is secondly that part by weight isWhen 200:1, E-E0 value is 7.2, be again part by weight while being 100:1 E-E0 value be 6.9. Can know that methabenzthiazuron is with twoPenoxsulam part by weight 25:1 is to increasing broadcasting ma wormwood artemisia effect between 1600:1, and secondly, for 50:1 is to 800:1, optimum is 100:1 to 200:1.
In sum, the composite rear mutual supplement with each other's advantages of methabenzthiazuron and florasulam, to broadcasting ma wormwood artemisia, clearvers, hard grass, seeingWheat ma all has good effect, and composite effect belongs to addition or synergistic effect.
Embodiment 22 field control effects are measured
1. experimental condition
1) selection of crop and cultivar
Wheat breed is Jimai sowing on October 9th, 22,2014, sows 15 kilograms for every mu, and line-spacing is 18cm.
2) selection of subjects weeds
Broadcast ma wormwood artemisia (Descurainiasophia (L.) webb), clearvers (GaliumaparinaL.), firmly careless(Sclerochloakengiana (Ohwi) Tzvel.), amur foxtail (AlopecurusaequalisSobl.) etc.
3) cultivation condition
Test wheat paddock is located at the Xia Jia of the office village, Xu Jia building, Tai’an, Shandong Province to carry out, 50 mu of testing ground areas, crop aroundFor wheat. Be experimental field loam, the content of organic matter 1.8%, pH value 7.15, uses 50 kilograms of composite fertilizers of formula fertilizer when wheat cultivation,Jointing stage is executed 10 kilograms of urea. Soil moisture content RH(% when dispenser) be 50 left and right.
Test physical features is smooth, and management is consistent, and it is better that fertility and water water condition. Experimental field water 2 times. Before surviving the winter, water the water of surviving the winter(at the beginning of 11 months), irrigate in grouting time after wheat fallen flowers (mid-May).
Stubble maize planting experimental field, herbicide used is mesotrione and atrazine.
2. experimental design
1) test medicine
70% methabenzthiazuron (methabenzthiazuron) WP, 50g/L florasulam (florasulam) SC, 50% methylTribenuron-methyl florasulam (methabenzthiazuron+florasulam) SC(methabenzthiazuron: florasulam weightAmount is than being respectively 10:1,200:1,300:1,400:1), i.e. embodiment 17-20 preparation.
2) using method
Spraying apparatus is noncomparable senior knapsack sprayer, tests each processing and is watered 450 liters of even spraying by per hectare. Yu DongThe cauline leaf even spraying processing of 2～5 leaf phase of wheat paddock annual grassy weeds.
3) spraying time and number of times
Tested on March 19th, 2015 and carry out, dispenser once altogether. When dispenser, wheat, in period of seedling establishment, grows fine; Weeds in field2～5 leaf phases, to broadcast ma wormwood artemisia, clearvers, hard grass, amur foxtail as main.
3. drug effect computational methods
Computing formula:
Prevention effect (%)=(weeds stubble number after the number of weeds-treatment region medicine of check plot) number of weeds × 100, ÷ check plot
Fresh weight preventive effect (%)=(the fresh careless weight of the fresh careless weight-treatment region in blank district) fresh careless weight × 100, ÷ blank district
Table 250% methyl tribenuron-methyl florasulam SC is applied to wheat paddock field effect measuring (investigation in 30 days after dispenser)
As shown in Table 2,70% methabenzthiazuron WP to broadcasting ma wormwood artemisia, hard careless effect is excellent, better to clearvers, shepherd's purse effect; 50g/LFlorasulam SC is all excellent to broadcasting ma wormwood artemisia, clearvers, shepherd's purse effect, invalid to hard grass; Both complex preparation 50% methylbenzene thiophenesThe each proportioning of grand florasulam SC to broadcasting ma wormwood artemisia, clearvers, shepherd's purse, hard grass all has good effect, hard careless effect is slightly worse thanOther weeds.
50% methabenzthiazuron florasulam SC(200:1) preventive effect is best, and total strain preventive effect reaches 97.2%, fresh weight preventive effectReach 98.2%. Next is 50% methabenzthiazuron florasulam SC(300:1). The complex preparation preventive effect of other two kinds of ratiosAlso substantially exceed single use.
By range estimation, in field experiment, do not observe herbicide damage and occur, 50% methabenzthiazuron florasulamSC is to wheat safety.
With wherein a kind of active ingredient comparison of independent use, the composite herbicide spectrum that expanded of the present invention, a dispenser can be controlledWeeds in fabrication whole growth period, not only herbicidal effect is remarkable, and environmentally friendly, without impact, right on second stubble cropThe pollution of environment is little, to people, animal, birds and beneficial organism safety, is conducive to keep ecological balance.
The above is only the preferred embodiment of the present invention, it should be pointed out that the ordinary skill people for the artMember, under the premise without departing from the principles of the invention, can also make some improvement and combination, and these improvement and combination also shouldBe considered as protection scope of the present invention.

Claims (6)

1. a herbicidal composition that contains methabenzthiazuron and florasulam, is characterized in that: active ingredient methylbenzeneGrand and part by weight scope florasulam of thiophene is that 25:1 is to 1600:1.
2. a kind of herbicidal composition that contains methabenzthiazuron and florasulam according to claim 1, its featureBe: the part by weight scope of active ingredient methabenzthiazuron and florasulam is that 50:1 is to 800:1.
3. a kind of herbicidal composition that contains methabenzthiazuron and florasulam according to claim 2, its featureBe: the part by weight scope of active ingredient methabenzthiazuron and florasulam is that 100:1 is to 400:1.
4. a kind of herbicidal composition that contains methabenzthiazuron and florasulam according to claim 3, its featureBe: the part by weight position 100:1 of active ingredient methabenzthiazuron and florasulam or 200:1,300:1,400:1.
5. according to a kind of herbicidal composition that contains methabenzthiazuron and florasulam described in claim 1-4, its spyLevy and be, described herbicidal composition preparation is missible oil, aqueous suspension agent, oil-suspending agent, wettable powder, granule or moistureShot agent, herbicidal composition preparation is included on agricultural chemicals acceptable, and one or more are selected from wetting agent, emulsifying agent, dispersionThe auxiliary agent of agent, thickener, antifreezing agent, disintegrant, binding agent, defoamer, carrier or filler.
6. a kind of herbicidal composition that contains methabenzthiazuron and florasulam according to claim 5, its featureBe, the purposes of described Herbicidal combinations preparation in control weeds of wheat, described weeds of wheat is that wheat paddock is wealthyLeaf weeds are broadcast the weeds such as ma wormwood artemisia, shepherd's purse, clearvers and grassy weed bromegrass, amur foxtail, hard Cao, Wang grass.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107318873A (en) * 2017-08-16 2017-11-07 安徽尚禾沃达生物科技有限公司 A kind of Herbicidal combinations containing mesosulfuron and florasulam

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CN87103145A (en) * 1986-04-30 1988-05-11 先灵农业化学品公司 Weedicide
CN1761395A (en) * 2003-03-13 2006-04-19 巴斯福股份公司 Synergistically acting herbicidal mixtures
CN102302027A (en) * 2011-06-30 2012-01-04 陕西美邦农药有限公司 Herbicidal composition containing florasulam

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN87103145A (en) * 1986-04-30 1988-05-11 先灵农业化学品公司 Weedicide
CN1761395A (en) * 2003-03-13 2006-04-19 巴斯福股份公司 Synergistically acting herbicidal mixtures
CN102302027A (en) * 2011-06-30 2012-01-04 陕西美邦农药有限公司 Herbicidal composition containing florasulam

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107318873A (en) * 2017-08-16 2017-11-07 安徽尚禾沃达生物科技有限公司 A kind of Herbicidal combinations containing mesosulfuron and florasulam
CN107318873B (en) * 2017-08-16 2019-07-02 安徽尚禾沃达生物科技有限公司 A kind of Herbicidal combinations containing mesosulfuron and florasulam

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