CN101999373A - Paddy field herbicide composition and preparation thereof - Google Patents
Paddy field herbicide composition and preparation thereof Download PDFInfo
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- CN101999373A CN101999373A CN2010105360645A CN201010536064A CN101999373A CN 101999373 A CN101999373 A CN 101999373A CN 2010105360645 A CN2010105360645 A CN 2010105360645A CN 201010536064 A CN201010536064 A CN 201010536064A CN 101999373 A CN101999373 A CN 101999373A
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Abstract
The invention relates to the field of pesticides, and discloses a paddy field herbicide composition and a preparation thereof. The herbicide composition of the invention comprises cyhalofop-butyl and flufenacet, wherein the mass ratio of the cyhalofop-butyl to the flufenacet is 1:1-3; the preparation of the herbicide composition consists of the herbicide composition serving as an active ingredient; and the preparation has the formulations of missible oil, oil suspension agent, wettable powder or water dispersible granules. The herbicide composition and the preparation thereof of the invention can prevent and kill off gramineous weeds, sedge weeds and broadleaf weeds, is safe to paddy, does not have influence on after-reap crops, is environment-friendly and has good application prospect.
Description
Technical field
The present invention relates to pesticide field, be specifically related to a kind of Herbicidal composition for paddy fields and preparation thereof.
Background technology
Paddy rice is the annual gramineae plant, produces each continent that spreads all over except that the South Pole, and paddy rice is not only the main cereal crops of China, also is one of world's staple food crop.About 1.45 hundred million hectares of whole world paddy rice cultivated area.China's rice growing area accounts for 1/4 of national cereal crops.No matter cultivated area or output, paddy rice all ranks first in China cereal crops.But the rice field of all rice workspaces of China always has crop smothering in various degree to take place.Wherein, medium crop smothering area accounts for more than 46% of the total cultivated area of paddy rice, and serious crop smothering area is more than 11.5%, and these weeds and paddy rice are at war with in every respect, and paddy rice is worked the mischief, more than 200 hundred million kilograms in annual thus loss grain.Therefore, domestic rice field is extensive use of weed killer herbicide, avoids paddy rice because of the weeds underproduction.
The flufenacet weed killer herbicide is by the weed killer herbicide kind of Bayer crop science company exploitation, can extensively prevent and kill off annual gramineous weed, nutgrass flatsedge and some granule broad leaved weeds; The cyhalofop-butyl weed killer herbicide is unique kind that paddy rice is had tight security in the fragrant phenoxy propionic acid class weed killer herbicide.The cyhalofop-butyl weed killer herbicide is interior suction conductivity weed killer herbicide, blade and leaf sheath by plant corpus absorb, the phloem conduction, accumulate meristem zone in plant corpus, resist acetyl-CoA carboxylase, fatty acid is synthesized stop, the growth division of cell can not normally be carried out, film system etc. contains the fat structural deterioration, causes plant death at last.Be mainly used in grassy weeds such as preventing and kill off moleplant seed, barnyard grass grass, lady's-grass, Paspalum distichum, green foxtail, eleusine indica, amur foxtail.But the cyhalofop-butyl weed killer herbicide is invalid to sedge weed and broad leaved weed, and is not good to some above the average age for marriage grassy weed preventive effect simultaneously.Therefore, the cyhalofop-butyl weed killer herbicide often alternately mixes use with other weed killer herbicides, but one comes the safety of paddy rice has been caused influence thus, is unfavorable for the growth of paddy rice.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of Herbicidal composition for paddy fields and preparation thereof, make this Herbicidal combinations and preparation thereof can prevent and kill off grassy weed, can prevent and kill off sedge weed and broad leaved weed again, simultaneously paddy rice is had good safety.
The invention provides a kind of Herbicidal composition for paddy fields, comprise cyhalofop-butyl and flufenacet, the mass ratio of described cyhalofop-butyl and flufenacet is 1: 1-3.
Cyhalofop-butyl, chemical name is (R)-2-[4 (4-cyano group-2-fluorophenoxy) phenoxy group]-butyl propionate, molecular weight is 357.3807, the cyhalofop-butyl weed killer herbicide belongs to fragrant phenoxy propionic acid class weed killer herbicide, paddy rice is had good selectivity, and selectivity is based on different accretion rates.In the paddy rice body, cyhalofop-butyl can be degraded to the diacid attitude to the acetyl-CoA carboxylase non-activity rapidly, thereby paddy rice is had the safety of height.In addition, cyhalofop-butyl is degraded rapidly in soil and in the typical paddy field water either, so also safer to succession crop.
Flufenacet, chemical name is 4 '-fluoro-N-isopropyl-2-(5-Trifluoromethyl-1,3,4-thiadiazoles-2-base oxygen) antifebrin, molecular weight is 363.36, the flufenacet weed killer herbicide is that this active component belongs to the aryloxyl acetamide type compound, can extensively prevent and kill off annual gramineous weed, nutgrass flatsedge and some granule broad leaved weeds by the weed killer herbicide kind of Bayer crop science company exploitation.Flufenacet has very high activity, is applicable to the main weeds of preventing and kill off paddy rice, cotton and other crops, is mainly used in soil treatment, before the bud, all can use behind the bud.
Each active component of Herbicidal combinations is because the difference of composition, structure, physicochemical property makes that the synergy between each active component might be 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 being exactly the effect of its generation, summation action equals the sum total of each composition effect; Antagonism is meant that a kind of material disturbed the effect of another kind of material when two kinds of materials acted on living organism, or the effect of interfering with an opponent each other, the phenomenon that general effect is descended.Synergy is analyzed with co-toxicity coefficient usually, when co-toxicity coefficient is an antagonism less than 80 the time, is summation action between 80-120; Be synergistic effect greater than 120.
Herbicidal combinations of the present invention detects through synergy and shows that two kinds of compositions do not have antagonism, reach remarkable synergistic effect; Show that through the safety detection described Herbicidal combinations has good safety to paddy rice.
Wherein, as preferably, the mass ratio of described cyhalofop-butyl and flufenacet is 1: 1.5-2.5, more preferably, the mass ratio of described cyhalofop-butyl and flufenacet is 1: 2.
The present invention also provides a kind of herbicides for use in paddy, and its active component is made up of Herbicidal combinations of the present invention.Wherein, the quality percentage composition of described Herbicidal combinations is the 10-85% of described weed killer herbicide.
As preferably, described weed killer herbicide is emulsifiable concentrate, oil-suspending agent, wetting powder or water dispersible granules.
Herbicidal combinations of the present invention and preparation thereof can be prevented and kill off grassy weed, can prevent and kill off sedge weed and broad leaved weed again, to rice safety, and succession crop are not had influence, and be environmentally friendly, has a good application prospect.
Embodiment
The invention discloses a kind of Herbicidal composition for paddy fields and preparation thereof, those skilled in the art can use for reference this paper content, suitably improve technological parameter and realize.Special needs to be pointed out is that all similarly replace and change apparent to those skilled in the art, they all are regarded as being included in the present invention.Herbicidal combinations of the present invention and preparation thereof are described by preferred embodiment, the related personnel obviously can change or suitably change and combination methods and applications as herein described in not breaking away from content of the present invention, spirit and scope, realizes and use the technology of the present invention.
According to the present invention, described Herbicidal combinations comprises cyhalofop-butyl and flufenacet, and the mass ratio of described cyhalofop-butyl and flufenacet is 1: 1-3.
Wherein, as preferably, the mass ratio of described cyhalofop-butyl and flufenacet is 1: 1.5-2.5, more preferably, the mass ratio of described cyhalofop-butyl and flufenacet is 1: 2.
The present invention also provides a kind of herbicides for use in paddy, and its active component is made up of Herbicidal combinations of the present invention.Wherein, the quality percentage composition of described Herbicidal combinations is the 10-85% of described weed killer herbicide.
As preferably, described weed killer herbicide is emulsifiable concentrate, oil-suspending agent, wetting powder or water dispersible granules.
Each active component of Herbicidal combinations is because the difference of composition, structure, physicochemical property, make that the synergy between each active component might be synergistic effect, summation action or antagonism, this synergy has determined whether Herbicidal combinations has good herbicidal effect and safety, synergy is analyzed with co-toxicity coefficient usually, when co-toxicity coefficient is an antagonism less than 80 the time, between 80-120 summation action; Be synergistic effect greater than 120.
The present invention adopts the abundant co-toxicity coefficient method of Sun Yun to estimate the synergy of Herbicidal combinations of the present invention, the result shows that the co-toxicity coefficient of different proportion Herbicidal combinations of the present invention is all remarkable, wherein cyhalofop-butyl, flufenacet mass ratio are 1: the co-toxicity coefficient of 1.5-2.5 is the most remarkable, and cyhalofop-butyl, flufenacet mass ratio are that 1: 2 co-toxicity coefficient is the highest.Show that Herbicidal combinations of the present invention has significant synergies to annual single broadleaf weed.
Safety determination test to paddy rice shows that Herbicidal combinations cauline leaf of the present invention is handled, and suppresses the ED of paddy growth 10%
10=776.3575, the ED of inhibition weed growth 90%
90=254.0701, selectivity factor is 776.3575/254.0701=3.06＞2, shows that said composition has obvious selectivity, and paddy rice is had good safety.
Weed killer herbicide of the present invention shows that by the field control effectiveness test in 2 years in the paddy rice 3-5 leaf phase, weeds 1-5 leaf does not wait the phase, and paddy rice does not see symptom of chemical damage from the dispenser to the maturing stage, to rice safety.The preventive effect of weeds reached more than 80% in 10 days, reached more than 90% in 30 days, along with the increase of dosage, preventive effect obviously strengthens, and a dispenser can be controlled the weeds in the crop whole growth phase, and not only herbicidal effect is remarkable, and environmentally friendly, second stubble crop there is not influence.
Below in conjunction with embodiment, further set forth the present invention.
Embodiment 1: Herbicidal combinations herbicidal effect of the present invention and synergy are measured
Under greenhouse experiment, adopt the pot experiment method, detect the herbicidal effect of Herbicidal combinations of the present invention, and the synergy type after estimating the two different proportion and use with the co-toxicity coefficient method of Sun Yunpei.
1, for examination material and cultural method
For the rice of trying the water is rich two excellent No. 1; For examination weeds kind is barnyard grass grass (Echinochloa crusgalli L.), moleplant seed (Leptochloa chinensis (L.) Nees), Procumbent Falsepimpernel (Lindernia procumbens (Krock.) Philcox), false loosestrife (Ludwigiaprostrata Roxb.), difformed galingale herb (Cyperus difformis L.), be 1 year field seed of gathering for the examination weeds, germination rate is more than 85%.
In the illumination cultivation chamber, carry out the cultivation of test material, temperature 25-35 ℃.Choosing diameter is 15cm, highly is the vinyon basin alms bowl of 15cm, and the permeable hole of 1cm diameter is beaten in the bottom of basin alms bowl.Permeable hole covers with double-deck filter paper, and the loam that the preparation in advance of packing in the alms bowl was sterilized soaks into soil with clear water from the bottom to the high 10cm of alms bowl place.During test, 20 of rice paddy seeds and every kind of 30 of weed seed are evenly put into basin respectively, earthing 0.5cm should not water in 2 days after the dispenser with the bottom mode regular replenishment required moisture of growing that seeps water between culture period.
2, reagent agent and compound method
95% flufenacet list agent is provided by Anhui Fengle Agricultural Co., Ltd; 97% cyhalofop-butyl list agent is available from Huifeng Agricultural Chemistry Co., Ltd., Jiangsu.
Take by weighing quantitative former medicine with electronic balance, add an amount of emulsifier, use acetone solution, use at last 0.1% soil temperature 80 aqueous solution with above-mentioned single dilution agent to desired concn.
3, dispenser level and method
Herbicidal combinations outside the Herbicidal combinations of the agent of flufenacet list, the agent of cyhalofop-butyl list, 5 different proportions of the present invention and 2 proportions of the present invention is established 5 concentration levels (unit: ga.i/ mu) respectively, described ratio is the active component mass ratio of flufenacet and cyhalofop-butyl, other establishes blank, and the dispenser level is specifically referring to table 1.
Table 1 dispenser level
| A | B | C | D | E | F | G | H | I | |
| Concentration level 1 | 0.625 | 0.3125 | 0.9375 | 0.9375 | 0.9375 | 0.9375 | 0.9375 | 0.9375 | 0.9375 |
| Concentration level 2 | 1.25 | 0.625 | 1.875 | 1.875 | 1.875 | 1.875 | 1.875 | 1.875 | 1.875 |
| Concentration level 3 | 2.5 | 1.25 | 3.75 | 3.75 | 3.75 | 3.75 | 3.75 | 3.75 | 3.75 |
| Concentration level 5 | 5 | 2.5 | 7.5 | 7.5 | 7.5 | 7.5 | 7.5 | 7.5 | 7.5 |
| Concentration level 6 | 10 | 5 | 15 | 15 | 15 | 15 | 15 | 15 | 15 |
Annotate: A is a flufenacet; B is a cyhalofop-butyl; D-H is the Herbicidal combinations of different proportion of the present invention, cyhalofop-butyl: the flufenacet ratio was followed successively by 1: 1,1: 1.5,1: 2,1: 2.5,1: 3, C and I are the Herbicidal combinations outside the proportion of the present invention, and cyhalofop-butyl: the flufenacet ratio was followed successively by 1: 0.5,1: 4.
Variable concentrations level, different proportion medicament were handled 1 time in 3 leaf phases of paddy rice and the spraying of weeds 2-4 leaf phase cauline leaf, and the spray medicine adopts the indoor overhead traveling crane formula spray testing device of adjustable speed, the conventional spray method in simulation field.Shower nozzle is a Fan spray head, and model is the Teejer8002E type, 40 kilograms/mu of spray values.0.5 meter of spray height, 0.7 meter of spraying swath, leg speed 0.224 meter per second, atomisation pressure 2.0 MPas, 697 liters/minute of flows.
4, Herbicidal combinations herbicidal effect of the present invention detects
The symptom of being injured of detail record weeds after the dispenser, behind the medicine 20 days, carrying out fresh weight measures, and relatively draw the fresh weight preventive effect with control treatment, fresh weight preventive effect=(blank group weeds fresh weight-experimental group weeds fresh weight)/blank group weeds fresh weight * 100%, repeat 4 tests and average, the result is referring to table 2.
Table 2 Herbicidal combinations is to the fresh weight preventive effect of weeds
Annotate: A is a flufenacet; B is a cyhalofop-butyl; D-H is the Herbicidal combinations of different proportion of the present invention, cyhalofop-butyl: the flufenacet ratio was followed successively by 1: 1,1: 1.5,1: 2,1: 2.5,1: 3, C and I are the Herbicidal combinations outside the proportion of the present invention, cyhalofop-butyl: the flufenacet ratio was followed successively by 1: 0.5,1: 4, and concentration unit is a ga.i/ mu.
The result shows, under the similar concentration level, the fresh weight preventive effect of the Herbicidal combinations of different proportion of the present invention all is higher than the Herbicidal combinations outside the agent of flufenacet list, the agent of cyhalofop-butyl list and the proportion of the present invention, show that Herbicidal combinations of the present invention has enlarged grass spectrum extremely, have the associating herbicide effect, its herbicidal effect obviously is better than the Herbicidal combinations outside the agent of flufenacet list, the agent of cyhalofop-butyl list and the proportion of the present invention.
5, Herbicidal combinations synergy of the present invention detects
The synergy type of Herbicidal combinations of the present invention is estimated in test with the co-toxicity coefficient method of Sun Yunpei.According to SUN, Y-P (Sun Yunpei) method is calculated its actual toxicity index, the theoretical toxicity index of mixture, co-toxicity coefficient.With the concentration logarithm is X, and damage by disease and insect preventive effect probit value is Y, asks regression equation.
Actual toxicity index=standard medicament LD
50The LD of/mixture
50* 100; Theoretical toxicity index=∑ (toxicity index of the reagent agent * percentage of this medicament active ingredient in mixture); The actual toxicity index of co-toxicity coefficient=mixture/theoretical toxicity index * 100; Be the standard medicament with the former prescription agent of flufenacet in the test.
Criterion: co-toxicity coefficient is an antagonism less than 80; It between 80-120 summation action; Be synergistic effect greater than 120.
Herbicidal combinations calculates its virulence regression equation, LD separately to toxic action situation and the preventive effect of weeds by formula as shown in Table 2
50, actual toxicity index, theoretical toxicity index and co-toxicity coefficient, the result is referring to table 3.
Table 3 Herbicidal combinations is to the synergy of weeds
Annotate: A is a flufenacet; B is a cyhalofop-butyl; D-H is the Herbicidal combinations of different proportion of the present invention, cyhalofop-butyl: the flufenacet ratio was followed successively by 1: 1,1: 1.5,1: 2,1: 2.5,1: 3, C and I are the Herbicidal combinations outside the proportion of the present invention, and cyhalofop-butyl: the flufenacet ratio was followed successively by 1: 0.5,1: 4.
The result shows that the co-toxicity coefficient of D, E, F, G, H is respectively: 124.56,165.04,200.44,165.52,115.30, and D, E, F, G co-toxicity coefficient are all greater than 120, and the H co-toxicity coefficient has the notable synergistic effect near 120.Wherein the co-toxicity coefficient with F is the highest, reaches extremely significantly synergistic effect.And the co-toxicity coefficient of C, I is starkly lower than Herbicidal combinations of the present invention, does not reach obvious synergistic effect.
Embodiment 2: Herbicidal combinations of the present invention is measured the safety of paddy rice
Under greenhouse experiment, adopt the pot experiment method, detect the safety of Herbicidal combinations of the present invention to paddy rice.
1, for examination material and cultural method
Supply to try the water rice for tucking in single No. 2; For examination weeds kind is barnyard grass grass (Echinochloa crusgalli L.), moleplant seed (Leptochloa chinensis (L.) Nees), Procumbent Falsepimpernel (Lindernia procumbens (Krock.) Philcox), false loosestrife (Ludwigia prostrata Roxb.), difformed galingale herb (Cyperus difformis L.), be 1 year field seed of gathering for the examination weeds, germination rate is more than 85%.
In the illumination cultivation chamber, carry out the cultivation of test material, temperature 25-35 ℃.Choosing diameter is 15cm, highly is the vinyon basin alms bowl of 15cm, and the permeable hole of 1cm diameter is beaten in the bottom of basin alms bowl.Permeable hole covers with double-deck filter paper, and the loam that the preparation in advance of packing in the alms bowl was sterilized soaks into soil with clear water from the bottom to the high 10cm of alms bowl place.During test, 20 of rice paddy seeds and every kind of 30 of weed seed are evenly put into basin respectively, earthing 0.5cm should not water in 2 days after the dispenser with the bottom mode regular replenishment required moisture of growing that seeps water between culture period.
2, reagent agent and compound method
95% flufenacet list agent is provided by Anhui Fengle Agricultural Co., Ltd; 97% cyhalofop-butyl list agent is available from Huifeng Agricultural Chemistry Co., Ltd., Jiangsu.
Add an amount of emulsifier, use acetone solution, with 0.1% soil temperature 80 aqueous solution above-mentioned former medicine is diluted to desired concn at last.
3, dispenser level and method
The Herbicidal combinations of 5 different proportions of the present invention is established 5 concentration level (units: mg/kg respectively, be Herbicidal combinations effective dose of the present invention in every 1kg solution), 5 ratios are with reference to the ratio of cyhalofop-butyl and flufenacet among table 1 D-H, (cyhalofop-butyl: flufenacet) be followed successively by is 1: 1,1: 1.5,1: 2,1: 2.5,1: 3 to the ratio of D-H, described ratio is the active component mass ratio of flufenacet and cyhalofop-butyl, and other establishes blank.
Variable concentrations level, different proportion medicament were handled 1 time in 3 leaf phases of paddy rice and the spraying of weeds 2-5 leaf phase cauline leaf, and the spray medicine adopts the indoor overhead traveling crane formula spray testing device of adjustable speed, the conventional spray method in simulation field.Shower nozzle is a Fan spray head, and model is the Teejer8002E type, 40 kilograms/mu of spray values.0.5 meter of spray height, 0.7 meter of spraying swath, leg speed 0.224 meter per second, atomisation pressure 2.0 MPas, 697 liters/minute of flows.
4, Herbicidal combinations safety of the present invention detects
After the dispenser 2 days, investigation is respectively handled paddy rice and is had or not symptom of chemical damage, if then detail record symptom of chemical damage, grade are arranged, behind the medicine 20 days, measure and respectively handle the paddy rice fresh weight, calculate the fresh weight inhibiting rate, with of the safety of clear and definite test medicine to paddy rice, inhibiting rate=(blank group paddy rice fresh weight-experimental group paddy rice fresh weight)/blank group paddy rice fresh weight * 100%.
Simultaneously, the symptom of being injured (as growth inhibition, chlorosis, deformity etc.) of dispenser detail record weeds after 2 days, behind medicine 20 days, the weeds fresh weight is respectively handled in weighing, calculate the fresh weight preventive effect of weeds, fresh weight preventive effect=(blank group weeds fresh weight-experimental group weeds fresh weight)/blank group weeds fresh weight * 100%.
Test all repeats 4 times, and data are averaged, and the range estimation examination criteria is referring to table 4, and testing result is referring to table 5, table 6.
Table 4 activity of weeding and crop safety ocular estimate evaluation criterion
Dispenser is visual observations after 2 days, and each paddy rice of handling of Herbicidal combinations of the present invention is all normal, does not have tangible symptom of chemical damage; Slight symptom of chemical damage all appears in each weeds of handling of Herbicidal combinations of the present invention.Show at dispenser initial stage Herbicidal combinations of the present invention rice safety is exerted an influence to weeds.
Table 5 Herbicidal combinations of the present invention is to the inhibitory action of paddy rice
Table 6 Herbicidal combinations of the present invention is to the fresh weight preventive effect of weeds
The result shows, the paddy rice that each ratio of Herbicidal combinations of the present invention and each concentration are handled after 20 days after the dispenser does not have obvious inhibitory action, only slightly when high concentration 1000mg/kg handles paddy rice suppresses growth; The weeds that each ratio of Herbicidal combinations of the present invention and each concentration are handled have obvious inhibitory action, and the fresh weight preventive effect just reaches more than 85% when concentration 250mg/kg.Show Herbicidal combinations of the present invention except that high concentration is handled slight inhibition paddy rice, all the other processing all have good safety to paddy rice.
5, Herbicidal combinations of the present invention is to the selectivity factor of paddy rice and weeds
According to table 5, table 6, with DPS software the logarithm value of drug dose and the probability value of paddy rice fresh weight inhibiting rate and weeds fresh weight preventive effect are carried out regression analysis, the ED when calculating correlation coefficient and suppressing crop 10%
10And the ED of inhibition weeds 90%
90, obtain selectivity index, selectivity index=ED
10/ ED
90
The result shows that the selectivity factor of the Herbicidal combinations of different proportion of the present invention shows that all greater than 2 Herbicidal combinations of the present invention has obvious selectivity, has good safety to paddy rice.
Embodiment 3: prepare weed killer herbicide-missible oil of the present invention
Missible oil specification: 10% flufenacet cyhalofop-butyl, cyhalofop-butyl: flufenacet=1: 1.5.Get the 6kg flufenacet, the 4kg cyhalofop-butyl, 8kg emulsifier 2201 (polyoxyethylene nonylphenol ether), dimethylbenzene complements to 100kg.Pass through the abundant mixing preparation of modulation kettle, be packaged to be the missible oil product.
Embodiment 4: prepare weed killer herbicide-oil-suspending agent of the present invention
Oil-suspending agent specification: 12% flufenacet cyhalofop-butyl, cyhalofop-butyl: flufenacet=1: 1.Get the 6kg flufenacet, the 6kg cyhalofop-butyl, 8kg Pluronic125, the 5kg propane diols, the 8kg xanthans, the 1kg methylated vegetable oil, water complements to 100kg.Pass through abundant mixing preparation, ball mill grinding, adjust, be packaged to be oil-suspending agent.
Embodiment 5: prepare weed killer herbicide-wetting powder of the present invention
Wetting powder specification: 30% flufenacet cyhalofop-butyl, cyhalofop-butyl: flufenacet=1: 2.Get the 20kg flufenacet, the 10kg cyhalofop-butyl, 6kg dispersant NNO, 3kg wetting agent K12, white carbon black complements to 100kg.Through fully mixing, comminution by gas stream, mixing, obtain wetting powder.
Embodiment 6: prepare weed killer herbicide-water dispersible granules of the present invention
Water dispersible granules specification: 84% flufenacet cyhalofop-butyl, cyhalofop-butyl: flufenacet=1: 3.Get the 63kg flufenacet, the 21kg cyhalofop-butyl, 7kg D-425,5kg EFW, 5kg ammonium sulfate, the 2kg polyethylene glycol, kaolin complements to 100kg.Obtain water dispersible granules through fully mixing, comminution by gas stream, mixing, granulation, drying and screening.
Embodiment 7: weed killer herbicide field control effectiveness test of the present invention
Do not wait the phase at paddy rice 3-5 leaf phase, weeds 1-5 leaf, utilize the water dispersible granules various dose of preparation among the embodiment 6 and convert water and spray in the rice field for 40 kilograms/mu, the 10th day, the 30th day and maturing stage range estimation rice safety and weeds preventive effect after the dispenser, the result is referring to table 7.
Table 7 weed killer herbicide field control effectiveness test of the present invention
According to the range estimation of table 4 standard, the water dispersible granules of preparation does not have obvious symptom of chemical damage to rice safety among the embodiment 6; The preventive effect of weeds, reached more than 80% in 10 days after the 15 gram/mu dispensers, reached more than 90% in 30 days, increase along with dosage, preventive effect obviously strengthens, and can reach good herbicidal effect when dispenser dosage is 20 gram/mus, compares with wherein a kind of active ingredient of independent use, enlarged and killed the grass spectrum, broad leaved weed and sedge weed have been had obvious synergistic effect.A dispenser can be controlled the weeds in the crop whole growth phase, and not only herbicidal effect is remarkable, and environmentally friendly, and second stubble crop is not had influence, and is little to the pollution of environment, to people, animal, birds and beneficial organism safety, helps keeping ecological balance.
Other weed killer herbicides of the present invention, i.e. the weed killer herbicide of embodiment 3 to embodiment 5 preparations all can reach above effect.In addition, weed killer herbicide of the present invention adopts physical method processing, and production technology is simple, and three-waste free discharge in the production process has no adverse effects to ecotope.
The above only is a preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (9)
1. a Herbicidal composition for paddy fields is characterized in that, comprises cyhalofop-butyl and flufenacet, and the mass ratio of described cyhalofop-butyl and flufenacet is 1: 1-3.
2. according to the described Herbicidal combinations of claim 1, it is characterized in that the mass ratio of described cyhalofop-butyl and flufenacet is 1: 1.5-2.5.
3. according to the described Herbicidal combinations of claim 2, it is characterized in that the mass ratio of described cyhalofop-butyl and flufenacet is 1: 2.
4. a herbicides for use in paddy is characterized in that, active component is made up of the described Herbicidal combinations of claim 1.
5. weed killer herbicide according to claim 4 is characterized in that, the quality percentage composition of described Herbicidal combinations is the 10-85% of described weed killer herbicide.
6. weed killer herbicide according to claim 4 is characterized in that, it is an emulsifiable concentrate.
7. weed killer herbicide according to claim 4 is characterized in that, it is an oil-suspending agent.
8. weed killer herbicide according to claim 4 is characterized in that, it is a wetting powder.
9. weed killer herbicide according to claim 4 is characterized in that, it is a water dispersible granules.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101433198A (en) * | 2008-12-02 | 2009-05-20 | 安徽华星化工股份有限公司 | Herbicidal composition for rice field |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108935484A (en) * | 2018-08-14 | 2018-12-07 | 安徽省银山药业有限公司 | A kind of mixed herbicide and its application containing propaquizafop and flufenacet |
| CN108935484B (en) * | 2018-08-14 | 2021-01-22 | 安徽辉隆集团银山药业有限责任公司 | Mixed herbicide containing oxadiargyl and flufenacet and application thereof |
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| CN101999373B (en) | 2013-02-27 |
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