CN102894005B - Herbicide composition - Google Patents
Herbicide composition Download PDFInfo
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- CN102894005B CN102894005B CN201210455634.7A CN201210455634A CN102894005B CN 102894005 B CN102894005 B CN 102894005B CN 201210455634 A CN201210455634 A CN 201210455634A CN 102894005 B CN102894005 B CN 102894005B
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- Prior art keywords
- bentazone
- ethoxysulfuron
- herbicidal combinations
- herbicide composition
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- 239000005476 Bentazone Substances 0.000 claims abstract description 40
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- Agricultural Chemicals And Associated Chemicals (AREA)
Abstract
The invention relates to the field of pesticide preparations and discloses a herbicide composition. The herbicide composition is formed by ethoxysulfuron and bentazone in a weight ratio of (1:10)-(1:200). The invention provides a herbicide composition preparation. The active ingredient of the preparation is formed by the herbicide composition. The herbicide composition and the conventional auxiliary materials can be prepared into the herbicide composition preparations such as wettable powder and water dispersible granules according to the known methods. The herbicide composition is formed by compounding ethoxysulfuron and bentazone, expands the herbicide controlling spectrum, can simultaneously control most weeds in the paddy fields, enhances the broad leaf and cyperaceae weed control effect, simultaneously has the advantages of long use age, safety to later crops, long duration and environmental safety and can be widely applied in the agricultural field.
Description
Technical field
The present invention relates to pesticidal preparations field, relate to specifically a kind of Herbicidal combinations, the Herbicidal combinations that especially a kind of active ingredient is comprised of ethoxysulfuron and bentazone.
Background technology
Paddy rice is one of world's staple food crop, and nearly half population in the world comprises the almost population in whole East Asia and Southeast Asia, all take rice as food, produces and spreads all over each continent except the South Pole.Eighties of last century late period, 4,000 hundred million kilograms of left and right of View of World Rice annual production average out to, approximately 1.45 hundred million hectares of cultivated areas.In China paddy rice, be also most important cereal crops.China's rice growing face accounts for 1/4 of national cereal crops, and about more than 3,500 ten thousand hectares, output accounts for over half every year.No matter cultivated area and output all rank first in China cereal crops.
The rice field of all rice workspaces of China, always has a large amount of weeds to occur.Paddy rice all has plantation in China various places, and weeds in paddy field kind is a lot, and various places are because of factor weeds kind differences such as weather, soil.According to statistics, the weeds that national rice field can form harm have more than 200 to plant, wherein the most common, occur general, endanger and serious have more than 40 to plant.According to investigations, crop smothering area of (2～5 grades) crop smothering more than medium in national rice field reaches 1546.7 ten thousand hm
2, accounting for the more than 46% of total cultivated area, (4～5 grades) area of wherein seriously causing harm is 3,800,000 hm
2, account for the more than 11.5% of Monitoring of Paddy Rice Plant Area.Maximum with harm with broad leaved weed and sedge weed generation area in these weeds.
Along with the development of agricultural cience and farming techniques, one of the applying as saving of labor, save time of chemical herbicide, cost-effective strong well stimulation.The usage ratio of domestic water paddy chemical weeding agent almost reaches 100%, and its dosage is very large.At present, paddy rice chemical herbicide kind is more, but mostly has various problems, as narrow in herbicide spectrum, easily produce resistance, lasting period short, to the uneasy congruent problem of succession crop.Along with rice cropping mode, cropping system constantly change, crop smothering problem is increasingly severe, and weeds in field is wide in variety, emergence period is long, and density is high, and harm is heavy, selecting safety, efficient chemical herbicide is the main method of current paddy field weeding, is also the key of guaranteeing that Rice Production gets an abundant harvest.
Summary of the invention
In view of this, object of the present invention provides a kind of safe, efficient Herbicidal combinations for paddy field.
For realizing object of the present invention, the present invention adopts following technical scheme:
A Herbicidal combinations, is comprised of ethoxysulfuron and bentazone.
Ethoxysulfuron, chemical name 3-(4,6-dimethoxypyridin-2-yl)-1-(2-ethoxyl phenenyl sulfonyl)-urea, the same with other sulfonylurea herbicides is the inhibitor of acetolactate synthestase (ALS).By weeds root and leaf, absorb, in plant body, conduct, weeds stop growing, then withered.Ethoxysulfuron broad weed-killing spectrum, can be used for preventing and treating annual broadleaf weed and sedge weed, as Monochoria vaginalis, water silk floss, moss, Monochoria korsakowii, dichotomous fimbristylis herb, difformed galingale herb, cyperus iria, needle spikesedge herb, Herba Cyperi Glomerati, firefly Lin, wild water chestnut, pondweed, rhizoma alismatis, Eclipta prostrata, short arrowhead, long arrowhead, bur beggar-ticks, beggar-ticks, grass dragon, false loosestrife, mexicana, ear leaf water amaranth, water three-coloured amaranth, four leaf duckweeds, little najas marina, eel grass, the pipewort etc. distinguished.
Bentazone, is again Bentazon, Lysimachia sikokiana pellet, hundred careless grams, bentazon, is a kind of broad spectrum activity contact killing type herbicide after seedling.When rice field is used, bentazone active ingredient mainly absorbs and conduction by the blade of weeds, mainly by the cauline leaf of weeds seedling, absorbs, and use in dry land at dry land bentazone, can permeate by blade and leaf sheath, can pass through root absorption again.Be applicable to the crops such as paddy rice, soybean, peanut, wheat and prevent and treat multiple broad-leaved and sedge weed.
Ethoxysulfuron is different with bentazone structure, the mechanism of action is different, the Herbicidal combinations being comprised of ethoxysulfuron and bentazone has expanded herbicide spectrum, can prevent and kill off most of weeds of paddy field simultaneously, broad leaved weed and sedge weed preventive effect are strengthened, also there is wide, long to rear stubble safety, lasting period, environmentally safe advantage of use age simultaneously.
Different Herbicidal combinations preparation active components are mixed rear each active component due to the difference of composition, structure, physicochemical property, make the synergy between each active component be typically expressed as synergistic effect, summation action or antagonism.So-called synergistic effect is exactly the mutual synergism between different material, and the effect of its generation is greater than the sum total of each composition effect; And the effect that summation action is exactly its generation equals the sum total of each composition effect; Antagonism refers to that when two kinds of materials act on living organism, a kind of material disturbs the effect of another kind of material, or the effect of interfering with an opponent each other, the phenomenon that general effect is declined.
The present invention evaluates two kinds of mixed interactions of different activities component of the present invention with reference to Sun Yunpei (Sun Y-P) method.Co-toxicity coefficient after the present invention is mixed with bentazone by calculating ethoxysulfuron, evaluates the two mixed rear effect, result demonstration, and the co-toxicity coefficient that the weight ratio of described ethoxysulfuron and bentazone is 1:10-1:200 is all greater than 120.By the test of outdoor biological activity determination, find, the ratio that the weight ratio of described ethoxysulfuron and bentazone is 1:10-1:200 is mixed use and is had notable synergistic effect.
Preferably, the weight ratio of described ethoxysulfuron and bentazone is 1: 10-1:200.1:10-1:100 more preferably.
Ethoxysulfuron and bentazone in the present invention combine in certain proportion, and both are composite, and synergistic effect is obvious, have reduced active ingredient dosage, have increased safety, have delayed the generation of herbicide resistance, can be widely used in agriculture field.
The present invention also provides a kind of Herbicidal combinations preparation, and it is made by Herbicidal combinations of the present invention and conventional auxiliary material.
Herbicidal combinations preparation of the present invention can be made various formulations by Herbicidal combinations of the present invention and conventional auxiliary material as required.Preferably, Herbicidal combinations preparation of the present invention is wetting powder or water dispersible granules.
Herbicidal combinations of the present invention is preferably wetting powder, and the percentage by weight that wherein said Herbicidal combinations accounts for described wetting powder is that percentage by weight that 1%-90%, wetting agent account for described wetting powder is that the percentage by weight that 1%-4%, dispersant account for described wetting powder is that 4%-8%, surplus are carrier.
Further, Herbicidal combinations of the present invention is also preferably water dispersible granules, and the percentage by weight that wherein said Herbicidal combinations accounts for described water dispersible granules is that percentage by weight that 1%-90%, wetting agent account for described water dispersible granules is that the percentage by weight that 1%-4%, dispersant account for described water dispersible granules is that 3%-8%, surplus are carrier.
Experiment shows, Herbicidal combinations preparation of the present invention can be prevented and kill off the serious weeds in paddy field of harm such as the Monochoria vaginalis, pondweed, special-shaped nutgrass flatsedge, cyperus iria of paddy field effectively, so the present invention also provides the application of described Herbicidal combinations preparation in killing weeds in rice field.
Embodiment
The embodiment of the invention discloses a kind of Herbicidal combinations.Those skilled in the art can use for reference content herein, suitably improve technological parameter and realize.Special needs to be pointed out is, all similar replacements and change apparent to those skilled in the artly, they are all deemed to be included in the present invention.Product of the present invention is described by preferred embodiment, and related personnel obviously can change product as herein described or suitably change and combination within not departing from content of the present invention, spirit and scope, realizes and apply the technology of the present invention.
For realizing object of the present invention, the present invention adopts following technical scheme:
A Herbicidal combinations, is comprised of ethoxysulfuron and bentazone.
Preferably, the weight ratio of described ethoxysulfuron and bentazone is 1: 10-1:200.1:10-1:100 more preferably.
The former medicine of agricultural chemicals is that active component generally can not directly be used, and must process and be mixed with various types of preparations, could use.Therefore the present invention also provides a kind of Herbicidal combinations preparation, and it is made by Herbicidal combinations of the present invention and conventional auxiliary material.
The form of preparation claims formulation, Herbicidal combinations preparation of the present invention can be made various formulations by Herbicidal combinations of the present invention and conventional auxiliary material as required, and wherein said auxiliary material comprises corresponding carrier, surfactant, dispersant or other agricultural agents.What agricultural chemicals use was at present more is that pulvis, aqua, wetting powder, missible oil, suspending agent, microcapsule suspending agent, water dispersible granules etc. more than ten are planted formulation.Herbicidal combinations preparation of the present invention comprises wetting powder or water dispersible granules.
Herbicidal combinations preparation of the present invention is preferably wetting powder, and the percentage by weight that wherein said Herbicidal combinations accounts for described wetting powder is that percentage by weight that 1%-90%, wetting agent account for described wetting powder is that the percentage by weight that 1%-4%, dispersant account for described wetting powder is that 4%-8%, surplus are carrier.In embodiment, wetting powder of the present invention is by 21%-50.5% active component, 1.5%-4% wetting agent, 4%-7% dispersant, surplus is carrier, through air-flow crushing hybrid process, obtain, fineness meets spraying requirement, 98% can pass through 325 orders, and the correlated performances such as its dispersiveness, stability all meet the technical standard of wetting powder formulation.
Further, Herbicidal combinations preparation of the present invention is also preferably water dispersible granules, and the percentage by weight that wherein said Herbicidal combinations accounts for described water dispersible granules is that percentage by weight that 1%-90%, wetting agent account for described water dispersible granules is that the percentage by weight that 1%-4%, dispersant account for described water dispersible granules is that 3%-8%, surplus are carrier.In embodiment, water dispersible granules of the present invention is by 51%-81% active component, 1.2%-2.3% wetting agent, 3.6%-4.5% dispersant, surplus is carrier, by mixing, adding, water is mediated, extruder grain forms, its disintegration, dispersion, the equal symbol water dispersible granules of the performance technical standard such as wetting.
Herbicidal combinations preparation of the present invention can also be made missible oil, microcapsules, aqueous emulsion, microemulsion and the multiple formulations such as organic clay agent newly developed except above-mentioned formulation as required, to be applied to agricultural production.
Above various preparations wetting agent, dispersant, carrier and other auxiliary materials used of preparation is and well known to a person skilled in the art.
Wetting agent of the present invention is TERWET 1004, SP-2845W, Morwet EFW, EMPICOLLX/B, pull open one or more in powder, lauryl sodium sulfate, dodecyl sodium naphthalene sulfonate, neopelex, calcium dodecyl benzene sulfonate.
Dispersant of the present invention is one or more in Morwet D-425, Morwet D-500, SP-2836, TERSPERSE 2700, TERSPERSE 2425, DEHSCOFIX 920, sodium methylene bis-naphthalene sulfonate, dispersing agent MF, sodium lignin sulfonate, calcium lignosulfonate, carboxymethyl cellulose.
Carrier of the present invention is one or more in kaolin, bentonite, potter's clay, diatomite, white carbon, precipitated calcium carbonate, sodium sulphate, ammonium sulfate.
In order further to understand the present invention, below in conjunction with embodiment, the present invention is described in detail.
Embodiment 1: Toxicity Determination:
The synergy being mixed to weeds in order to understand ethoxysulfuron and bentazone, carry out following test:
Test method: test soil is quantitatively filled to 4/5 place of basin alms bowl, adopts top pouring, make soil complete wetting to saturated mode.By pretreated, for examination weed seed, be evenly sowed at soil surface, earthing 0.5cm, after planting keeps soil fully moistening, moves into greenhouse cellar culture, grows to the 2-3 leaf phase carry out dispenser processing to weeds.Weed seed every 20 as a processing, each is processed 4 times and repeats.Calculate preventive effect, then by method of least squares, calculate concentration EC in inhibition
50(95% confidence interval), then calculate co-toxicity coefficient (CTC) by the abundant method of Sun Yun.Co-toxicity coefficient (CTC) >=120 shows as synergistic effect; (CTC)≤80 show as antagonism to co-toxicity coefficient; 80< co-toxicity coefficient (CTC) <120 shows as summation action.Add up different proportionings and the results are shown in Table 1.Co-toxicity coefficient computing formula is as follows:
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 virulence coefficient (TTI) of mixture actual measurement virulence coefficient (ATI)/mixture] * 100
The different proportioning ethoxysulfurons of table 1 and bentazone are measured the synergy of weeds
From table 1 result, ethoxysulfuron and bentazone proportioning are between 1:10-1:200, and co-toxicity coefficient is greater than 120, has synergistic effect.
Embodiment 2:21% ethoxysulfuron bentazone wetting powder
Ethoxysulfuron 1%, bentazone 20%, sodium lignin sulfonate 6.0%, lauryl sodium sulfate 3.0%, precipitated calcium carbonate supply 100%, through air-flow crushing, fully mixing, obtain 11% ethoxysulfuron bentazone wetting powder.
Embodiment 3:31% ethoxysulfuron bentazone wetting powder
Ethoxysulfuron 1%, bentazone 30%, Morwet EFW 1.5%, Morwet D-5004.0%, diatomite supply 100%, through air-flow crushing, fully mixing, obtain 31% ethoxysulfuron bentazone wetting powder.
Embodiment 4:50.5% ethoxysulfuron bentazone wetting powder
Ethoxysulfuron 0.5%, bentazone 50%, dispersing agent MF 7.0%, lauryl sodium sulfate 4.0%, kaolin supply 100%, through air-flow crushing, fully mixing, obtain 50.5% ethoxysulfuron bentazone wetting powder.
Embodiment 5:51% ethoxysulfuron bentazone water dispersible granules
Ethoxysulfuron 1%, bentazone 50%, TERWET 10041.2%, TERSPERSE 27004.5%, diatomite supply 100%, through air-flow crushing, fully mixing, kneading granulation, drying and screening, obtain 51% ethoxysulfuron bentazone water dispersible granules.
Embodiment 6:62% ethoxysulfuron bentazone water dispersible granules
Ethoxysulfuron 2%, bentazone 60%, SP-2845W 1.2%, SP-28363.6%, kaolin supply 100%, through air-flow crushing, fully mixing, kneading granulation, drying and screening, obtain 77% ethoxysulfuron bentazone water dispersible granules.
Embodiment 7:81% ethoxysulfuron bentazone water dispersible granules
Ethoxysulfuron 1%, bentazone 80%, TERWET 10042.3%, TERSPERSE 27004.5%, TERSPERSE 24251.0%, kaolin supply 100%.Through air-flow crushing, fully mixing, kneading granulation, drying and screening, can obtain 81% ethoxysulfuron bentazone water dispersible granules.
Embodiment 8: field control effectiveness test:
In the paddy rice 1-3 leaf phase, with product prepared by 15% ethoxysulfuron WDG, 25% bentazone AS and embodiment 2-7 of the present invention, carry out cauline leaf spraying respectively and process, wherein 15% ethoxysulfuron WDG effective ingredient consumption 30g/hm
2, 25% bentazone AS effective ingredient consumption is 1000g/hm
2, each embodiment effective ingredient consumption is 25g/hm
2.After medicine, 30d adds up respectively the preventive effect to Monochoria vaginalis, pondweed, special-shaped nutgrass flatsedge, cyperus iria, the results are shown in Table 2.
Each embodiment of table 2 is to the preventive effect of weeds (%)
From table 2 result, effective ingredient consumption in described Herbicidal combinations preparation is less than under the prerequisite of each single dose effective ingredient consumption, its preventive effect is higher than the preventive effect of each single dose, show in Herbicidal combinations preparation of the present invention that each active component is without cross tolerance, control efficiency has synergistic effect, can effectively prevent and kill off most of weeds of paddy field, the sedge weed preventive effects such as the broad leaved weeds such as Monochoria vaginalis and special-shaped nutgrass flatsedge, cyperus iria are strengthened.
The explanation of above embodiment is just for helping to understand method of the present invention and core concept thereof.It should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention, can also carry out some improvement and modification to the present invention, these improvement and modification also fall in the protection domain of the claims in the present invention.
Claims (6)
1. a Herbicidal combinations, is characterized in that, ethoxysulfuron and bentazone, consists of, and the weight ratio of described ethoxysulfuron and bentazone is 1:80-1:100.
2. a Herbicidal combinations preparation, is characterized in that, by Herbicidal combinations described in claim 1 and conventional auxiliary material, is made.
3. Herbicidal combinations preparation according to claim 2, is characterized in that, it is wetting powder, water dispersible granules.
4. Herbicidal combinations preparation according to claim 3, it is characterized in that, it is wetting powder, and the percentage by weight that wherein said Herbicidal combinations accounts for described wetting powder is that percentage by weight that 1%-90%, wetting agent account for described wetting powder is that the percentage by weight that 1%-4%, dispersant account for described wetting powder is that 4%-8%, surplus are carrier.
5. Herbicidal combinations preparation according to claim 3, it is characterized in that, it is water dispersible granules, and the percentage by weight that wherein said Herbicidal combinations accounts for described water dispersible granules is that percentage by weight that 1%-90%, wetting agent account for described water dispersible granules is that the percentage by weight that 1%-4%, dispersant account for described water dispersible granules is that 3%-8%, surplus are carrier.
6. the application of Herbicidal combinations preparation in killing weeds in rice field described in claim 2～5 any one.
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