CN103621530A - Weeding composition containing fentrazamide and cyhalofop-butyl - Google Patents
Weeding composition containing fentrazamide and cyhalofop-butyl Download PDFInfo
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- CN103621530A CN103621530A CN201310528635.4A CN201310528635A CN103621530A CN 103621530 A CN103621530 A CN 103621530A CN 201310528635 A CN201310528635 A CN 201310528635A CN 103621530 A CN103621530 A CN 103621530A
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- cyhalofop
- butyl
- fentrazamide
- herbicidal combinations
- weed
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Abstract
The invention discloses a weeding composition containing fentrazamide and cyhalofop-butyl, which comprises common auxiliaries, fentrazamide and cyhalofop-butyl, wherein the mass part ratio of fentrazamide to cyhalofop-butyl is (10:1)-(1:10), preferably 3:1. By compounding fentrazamide and cyhalofop-butyl, an obvious synergistic effect is realized, and the dosage of the active ingredients of the compound drug is obviously reduced from that of separately using fentrazamide and cyhalofop-butyl. The pesticide composition of fentrazamide and cyhalofop-butyl is applicable to the early stage of seeding in a rice dry-nursery bed when the annual weeds do not come up, and a spray process or a poisoned soil process can be adopted. The composition disclosed by the invention is applicable to the annual weeds of the rice dry-nursery bed.
Description
Technical field
A kind of Herbicidal combinations the present invention relates to is that to take fentrazamide and cyhalofop-butyl be active ingredient, for preventing and kill off arid rice nursery annual weed.
Background technology
Chemical method weeding is one of upper Main Means of controlling weeds of agricultural.In recent years, because some weed killer herbicide kind large area are used separately, caused a lot of weeds to develop immunity to drugs.Simultaneously, grass when weeds occur is complicated mutually, not only annual and perennial weed is mixed raw, draft, liana and shrub have concurrently, and weeds emerge uneven, seed, the staggered generation of low age, advanced age weeds, so when weed killer herbicide kind is used separately, all can show defect and limitation in a certain respect.
Fentrazamide belongs to oxime ester compound, wide spectrum selective post-emergence herbicide.Mechanism of action is similar to sulfonylurea and imidazolone weed killer herbicide, all belongs to acetolactate synthestase (ALS) inhibitor.Paddy rice, common wheat, Korea lawn grass are had to activity of weeding after selectivity super-high-efficient bud, without activity of weeding before bud, distinguished for preventing and kill off the various grassy weeds such as barnyard grass, large fringe amur foxtail, polygonum flaccidum and the assorted effect of drawing of broad-leaved, to paddy rice, common wheat safety.Chemical weeding speed is slower, after dispenser, can suppress weed growth, but must be withered after 2 weeks.Medicament medication appropriateness is wider, all effective to the barnyard grass 1.5-6.5 leaf phase.
Cyhalofop-butyl is only kind paddy rice to tight security in fragrant phenoxy phenoxy propionic acid weed killer herbicide, the same with such other kinds, is also interior suction conductivity weed killer herbicide.Blade and leaf sheath by plant corpus absorb, and phloem conduction, accumulates the meristem zone in plant corpus, resist acetyl-CoA carboxylase (ACCase), fatty acid is synthesized and stop, the growth division of cell can not normally be carried out, film systems etc., containing fat structural deterioration, finally cause plant dead.From cyhalofop-butyl, be absorbed into weeds Mortality Ratio slower, generally need 1-3 week.The symptom of weeds after dispenser is as follows: the tender shoots atrophy of four leaf phases, causes death.The Lao Ye of two leaf stage changes minimum, keeps green.
Be mainly used in preventing and kill off important grassy weed.Cyhalofop-butyl is efficient to moleplant seed, and low age barnyard grass is had to certain preventive effect, also can prevent and kill off, lady's-grass, Paspalum distichum, green foxtail, eleusine indica, amur foxtail etc., invalid to sedge weed and broad leaved weed.
During the single use of fentrazamide and cyhalofop-butyl, all there are certain defect and limitation.
The inventor conducts in-depth research being mixed of fentrazamide and cyhalofop-butyl, on the basis of a large amount of formula indoor screening tests and field medicine effect test, find that fentrazamide and cyhalofop-butyl are mixed, within the scope of certain mixed ratio, paddy field weed is shown to obvious synergistic effect, after further study, completed the present invention.
Being mixed and applying of fentrazamide and cyhalofop-butyl there is no report at present.
Summary of the invention
The object of the invention is to solve the deficiency that above-mentioned weed killer herbicide is actual in using, provide a kind of efficient, low toxicity, low cost, quick-acting good, and the lasting period is long, is conducive to the Herbicidal combinations of the weeds in paddy field comprehensive regulation.
Another object of the present invention is to provide this Herbicidal combinations is applied to prevent and kill off arid rice nursery annual weed.
Technical scheme: for achieving the above object, the invention provides a kind of Herbicidal combinations that fentrazamide and cyhalofop-butyl be active ingredient of take, the ratio of weight and number of fentrazamide and cyhalofop-butyl is 10:1～1:10, and better ratio is 3:1.
Described Herbicidal combinations can, according to well known to a person skilled in the art method, be mixed with the application forms of the applicable agricultural uses such as oil-suspending agent, wetting powder, water dispersible granules.
Described Herbicidal combinations also contains acceptable insecticides adjuvant in the required agricultural of preparation pesticidal preparations, be selected from one or more in solvent, emulsifier, wetting agent, stabilizing agent, dispersant, bleeding agent, thickener, defoamer, antifreezing agent, disintegrant, binding agent, filler, carrier, medium, surfactant, be known substance, various auxiliary agents conventional in pesticidal preparations, according to different situations, can change to some extent, be not particularly limited.
The production technology of the described various application forms of Herbicidal combinations all belongs to existing known technology, does not repeat them here.
Herbicidal combinations provided by the invention, is applied to prevent and kill off arid rice nursery annual weed.
Herbicidal combinations provided by the invention, adopts the method for directed spraying to use conventionally, also can adopt as required other operation techniques of the upper application of agricultural.
Herbicidal combinations provided by the invention has following beneficial effect:
1, Herbicidal combinations provided by the invention, in certain ratio range, show obvious synergistic effect, the control efficiency of composition is significantly improved than single dose, reduced the using dosage of agricultural chemicals, reduced medication number of times, reduce drug cost, reduced the adverse effect of agricultural chemicals to ecotope.
2, Herbicidal combinations provided by the invention, the combination of two kinds of active ingredients, has expanded herbicidal spectrum, and a drug can solve various weeds problems, has made up defect and limitation when single dose is used.
3, Herbicidal combinations provided by the invention, two kinds of active ingredient mechanism of action are different, can overcome the shortcoming that long-term single use easily produces resistance, extend the service life of medicament, the comprehensive regulation important in inhibiting to Weed Resistance.
4, Herbicidal combinations provided by the invention, rapidly, the lasting period is long in drug effect performance, and use cost is low, easy to use, time saving and energy saving, and it applies huge economic benefit and social benefit.
Embodiment
In order to make object of the present invention, technical scheme and advantage more short and sweet, the present invention describes with following specific embodiment, but the present invention only limits to absolutely not these examples.The following stated is only the good embodiment of the present invention, only for describing the present invention, can not be interpreted as the restriction to scope of the present invention.It should be pointed out that all any modifications of making within the spirit and principles in the present invention, be equal to replacement and improvement etc., within all should being included in protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Biologicall test embodiment mono-:
Fentrazamide and cyhalofop-butyl are mixed the synergy of paddy field weed are measured.
Test material: Commeline communis [Stellaria media (L.) Cyrillus] (field is collected seed and preserved).Barnyard grass [Echinochloa crusgalli (L.) Beaw Setaria] (field is collected seed and preserved).
Test apparatus: controlled illumination box; The accurate laboratory of POTTER spray tower; Electronic balance (sensibility reciprocal 0.1mg); Micropipette rifle etc.
Test method: the former medicine of 96% fentrazamide that first takes certain mass, 95% cyhalofop-butyl active compound, adds acetone fully to dissolve the Tween 80 aqueous solution dilution of rear use 0.1%, is mixed with respectively single dose mother liquor, according to the object that is mixed, serial proportioning is set, each proportioning arranges 5～7 concentration gradients.According to single dose herbicide spectrum, select representative susceptible weeds seed standby.To select the processing of numbering to carry out after soil treatment, be placed in illumination box incubated at room temperature 10 days, calculate control efficiency (fresh weight), then with method of least squares calculate suppress in dense EC
50(95% confidence limit), then calculate co-toxicity coefficient (CTC) by the abundant method of Sun Yun.
Co-toxicity coefficient (CTC) >=120 shows as synergistic effect; Co-toxicity coefficient (CTC)≤80 shows as antagonism; 80 < co-toxicity coefficient (CTC) < 120 show as summation action.
Actual measurement toxicity index (ATI)=(standard medicament EC
50/ reagent agent EC
50) * 100.
Theoretical toxicity index (TTI)=(percentage composition of A in toxicity index * mixture of A)+(percentage composition of B in toxicity index * mixture of B).
Co-toxicity coefficient (CTC)=[the theoretical toxicity index (TTI) of mixture actual measurement toxicity index (ATI)/mixture] * 100.
Measurement result shows, fentrazamide and cyhalofop-butyl are between proportioning (weight ratio) 10:1～1:10, paddy field barnyard grass is had and mutually supplements preventive effect and synergistic function, especially best with 3:1, paddy field Commeline communis is shown to excellent synergistic effect co-toxicity coefficient (CTC) and be up to 143.1.
Table 1, different proportioning fentrazamide and cyhalofop-butyl are measured the synergy of barnyard grass.
Table 2, different proportioning fentrazamide and cyhalofop-butyl are measured the synergy of dayflower.
One: 32% fentrazamide cyhalofop-butyl wetting powder of FORMULATION EXAMPLE.
Above-mentioned formula is entered in blender after coarse crushing and mixed in proportion, then after air-flow crushing, make 32% fentrazamide cyhalofop-butyl wetting powder.
This embodiment is used for preventing and kill off arid rice nursery annual weed, 32% fentrazamide cyhalofop-butyl wetting powder consumption 480g a.i./ha soil treatment, and after medicine, 10 days preventive effects are 97.8%; 30% fentrazamide wetting powder consumption 360g a.i./ha soil treatment, after medicine, 10 days preventive effects are 78.5%; 15% cyhalofop-butyl missible oil consumption 120g a.i./ha soil treatment, after medicine 10 days 73.6%.The composite rear synergy of fentrazamide and cyhalofop-butyl is obvious, and 32% fentrazamide cyhalofop-butyl wetting powder is prevented and kill off arid rice nursery annual weed drug effect and is obviously better than 30% fentrazamide wetting powder and 15% cyhalofop-butyl missible oil.Because pharmacy control efficacy improves, compound drug effective ingredient consumption reduces, and has reduced drug cost, delays the generation of disease drug resistance, has reduced environmental pollution.
Two: 80% fentrazamide cyhalofop-butyl water-dispersible granules of FORMULATION EXAMPLE.
By above-mentioned formula, dry pulverization process, granulation, dry, screening make 80% fentrazamide cyhalofop-butyl water-dispersible granules in proportion.
This embodiment is used for preventing and kill off arid rice nursery annual weed, 80% fentrazamide cyhalofop-butyl water-dispersible granule consumption 480g a.i./ha soil treatment, and after medicine, 10 days preventive effects are 97.3%; 50% fentrazamide wetting powder consumption 360g a.i./ha soil treatment, after medicine, 10 days preventive effects are 68.3%; 15% cyhalofop-butyl missible oil consumption 120g a.i./ha soil treatment, after medicine 10 days 86.3%.The composite rear synergy of fentrazamide and cyhalofop-butyl is obvious, and 80% fentrazamide cyhalofop-butyl water-dispersible granules is prevented and kill off arid rice nursery annual weed drug effect and is obviously better than 50% fentrazamide wetting powder and 15% cyhalofop-butyl missible oil.Because pharmacy control efficacy improves, compound drug effective ingredient consumption reduces, and has expanded herbicide spectrum, has reduced drug cost, delays the generation of disease drug resistance, has reduced environmental pollution.
Three: 20% fentrazamide cyhalofop-butyl oil-suspending agents of FORMULATION EXAMPLE.
Above-mentioned formula Central Plains medicine, solvent, emulsifiers dissolve are become to even oil phase; Under high-speed stirred, mix and make 20% fentrazamide cyhalofop-butyl oil-suspending agent.
This embodiment is used for preventing and kill off arid rice nursery annual weed, 20% fentrazamide cyhalofop-butyl oil-suspending agent consumption 480g a.i./ha soil treatment, and after medicine, 10 days preventive effects are 97.1%; 50% fentrazamide wetting powder consumption 360g a.i./ha soil treatment, after medicine, 10 days preventive effects are 72.1%; 10% cyhalofop-butyl missible oil consumption 120g a.i./ha soil treatment, after medicine 10 days 75.2%.The composite rear synergy of fentrazamide and cyhalofop-butyl is obvious, and 20% fentrazamide cyhalofop-butyl oil-suspending agent is prevented and kill off arid rice nursery annual weed drug effect and is obviously better than 50% fentrazamide wetting powder and 10% cyhalofop-butyl missible oil.Because pharmacy control efficacy improves, compound drug effective ingredient consumption reduces, and has expanded herbicide spectrum, has reduced drug cost, delays the generation of disease drug resistance, has reduced environmental pollution.
Claims (4)
1. a Herbicidal combinations that contains fentrazamide and cyhalofop-butyl, is characterized in that: active ingredient is fentrazamide and cyhalofop-butyl, and the ratio of weight and number of fentrazamide and cyhalofop-butyl is 10:1～1:10.
2. a kind of Herbicidal combinations that contains fentrazamide and cyhalofop-butyl according to claim 1, is characterized in that: described fentrazamide and the ratio of weight and number of cyhalofop-butyl are 3:1.
3. a kind of Herbicidal combinations that contains fentrazamide and cyhalofop-butyl according to claim 1, is characterized in that: the formulation of described Herbicidal combinations can be a kind of in oil-suspending agent, wetting powder or water dispersible granules.
4. a kind of Herbicidal combinations that contains fentrazamide and cyhalofop-butyl according to claim 1 and 2, is characterized in that: for preventing and kill off arid rice nursery annual weed.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310528635.4A CN103621530B (en) | 2013-10-30 | 2013-10-30 | A kind of containing fentrazamide with the Herbicidal combinations of cyhalofop-butyl |
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| CN201310528635.4A CN103621530B (en) | 2013-10-30 | 2013-10-30 | A kind of containing fentrazamide with the Herbicidal combinations of cyhalofop-butyl |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11335212A (en) * | 1998-05-21 | 1999-12-07 | Nippon Bayer Agrochem Co Ltd | Herbicide composition for paddy field |
| CN1332608A (en) * | 1998-11-10 | 2002-01-23 | 辛根塔参与股份公司 | Herbicidal composition |
| CN101686671A (en) * | 2007-06-19 | 2010-03-31 | 拜尔农作物科学股份公司 | Synergistic crop-tolerated combinations of herbicides from the benzoylcyclohexandione group for application in rice growing |
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- 2013-10-30 CN CN201310528635.4A patent/CN103621530B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11335212A (en) * | 1998-05-21 | 1999-12-07 | Nippon Bayer Agrochem Co Ltd | Herbicide composition for paddy field |
| CN1332608A (en) * | 1998-11-10 | 2002-01-23 | 辛根塔参与股份公司 | Herbicidal composition |
| CN101686671A (en) * | 2007-06-19 | 2010-03-31 | 拜尔农作物科学股份公司 | Synergistic crop-tolerated combinations of herbicides from the benzoylcyclohexandione group for application in rice growing |
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| CN103621530B (en) | 2016-09-14 |
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