CN101999373B - Paddy field herbicide composition and preparation thereof - Google Patents
Paddy field herbicide composition and preparation thereof Download PDFInfo
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- CN101999373B CN101999373B CN 201010536064 CN201010536064A CN101999373B CN 101999373 B CN101999373 B CN 101999373B CN 201010536064 CN201010536064 CN 201010536064 CN 201010536064 A CN201010536064 A CN 201010536064A CN 101999373 B CN101999373 B CN 101999373B
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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 the South Pole, and paddy rice is not only the main cereal crops of China, also is one of world's staple food crop.Approximately 1.45 hundred million hectares of whole world Monitoring of Paddy Rice Plant Areas.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 occur.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, and annual loss grain is more than 200 hundred million kilograms thus.Therefore, domestic rice field is widely used 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 Bitterfeld GmbH 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 phenoxy propionic acid 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 the 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 at last plant dead.Be mainly used in preventing and kill off the grassy weeds such as moleplant seed, barnyard 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 biggrassweeds 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 impact 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, so that this Herbicidal combinations and preparation thereof can be prevented 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 phenoxy propionic acid 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 rapidly the diacid attitude to the acetyl-CoA carboxylase non-activity, 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, therefore 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 Bitterfeld GmbH crop science company exploitation.Flufenacet has very high activity, is applicable to prevent and kill off the main weeds of 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 owing to the difference of composition, structure, physicochemical property, so 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 its produce an effect is greater than the sum total of each composition effect; And summation action is exactly the sum total that its produce an effect equals each composition effect; When antagonism referred to that two kinds of materials act on living organism, a kind of material disturbed the effect of another kind of material, 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 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 without 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 comprised 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 on succession crop without impact, environmentally friendly, have 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, all similarly replace and change apparent to those skilled in the art, and they all are deemed to be 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 within 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 comprised 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, so 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 antagonism less than 80 the time, be summation action between 80-120; 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.
Security test test to paddy rice shows, Herbicidal combinations cauline leaf processing of the present invention, the ED of inhibition 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, has good safety to paddy rice.
Weed killer herbicide of the present invention passes through the field control effectiveness test demonstration in 2 years, and in the paddy rice 3-5 leaf phase, weeds 1-5 leaf does not wait the phase, and paddy rice has no 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 of crop in whole vegetative period, and not only herbicidal effect is remarkable, and environmentally friendly, on second stubble crop without impact.
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 pot-culture 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
Be for the rice of trying the water rich two excellent No. 1; Supplying examination weeds kind is barnyard 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 in advance preparation 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 respectively basin, earthing 0.5cm should with the bottom mode regular replenishment required moisture of growing that seeps water, not water in 2 days after the dispenser between culture period.
2, reagent agent and compound method
95% flufenacet single dose is provided by Anhui Fengle Agricultural Co., Ltd; 97% cyhalofop-butyl single dose 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, with 0.1% the POLYSORBATE 80 aqueous solution above-mentioned single dose is diluted to desired concn at last.
3, drug delivery level and method
Herbicidal combinations outside the Herbicidal combinations of flufenacet single dose, cyhalofop-butyl single dose, 5 different proportions of the present invention and 2 proportions of the present invention is established respectively 5 concentration levels (unit: ga.i/ mu), described ratio is the active component mass ratio of flufenacet and cyhalofop-butyl, other establishes blank, and drug delivery level is specifically referring to table 1.
Table 1 drug delivery 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 flufenacet; B is cyhalofop-butyl; D-H is the Herbicidal combinations of different proportion of the present invention, cyhalofop-butyl: the flufenacet ratio is 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 is followed successively by 1: 0.5,1: 4.
Variable concentrations level, different proportion medicament were processed 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 crown-block type atomizing tester of adjustable speed, the conventional spray method in simulation field.Shower nozzle is Fan spray head, and model is the Teejer8002E type, 40 kg/acres 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 liter/mins 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 flufenacet; B is cyhalofop-butyl; D-H is the Herbicidal combinations of different proportion of the present invention, cyhalofop-butyl: the flufenacet ratio is 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 is followed successively by 1: 0.5,1: 4, and concentration unit is 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 flufenacet single dose, cyhalofop-butyl single dose and the proportion of the present invention, show that Herbicidal combinations of the present invention has enlarged the herbicide spectrum, have the associating herbicide effect, its herbicidal effect obviously is better than the Herbicidal combinations outside flufenacet single dose, cyhalofop-butyl single dose 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.Take the concentration logarithm as X, 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; In the test take the former prescription agent of flufenacet as the standard medicament.
Criterion: co-toxicity coefficient is antagonism less than 80; It is summation action between 80-120; 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 flufenacet; B is cyhalofop-butyl; D-H is the Herbicidal combinations of different proportion of the present invention, cyhalofop-butyl: the flufenacet ratio is 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 is followed successively by 1: 0.5,1: 4.
The result shows, the co-toxicity coefficient of D, E, F, G, H is respectively: 124.56,165.04,200.44,165.52,115.30, D, E, F, G co-toxicity coefficient all greater than 120, H co-toxicity coefficient near 120, have the notable synergistic effect.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 to the Security test of paddy rice
Under greenhouse experiment, adopt pot-culture method, detect Herbicidal combinations of the present invention to the safety of paddy rice.
1, for examination material and cultural method
Supply to try the water rice for tucking in single No. 2; Supplying examination weeds kind is barnyard 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 in advance preparation 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 respectively basin, earthing 0.5cm should with the bottom mode regular replenishment required moisture of growing that seeps water, not water in 2 days after the dispenser between culture period.
2, reagent agent and compound method
95% flufenacet single dose is provided by Anhui Fengle Agricultural Co., Ltd; 97% cyhalofop-butyl single dose is available from Huifeng Agricultural Chemistry Co., Ltd., Jiangsu.
Add an amount of emulsifier, use acetone solution, with 0.1% the POLYSORBATE 80 aqueous solution above-mentioned former medicine is diluted to desired concn at last.
3, drug delivery level and method
The Herbicidal combinations of 5 different proportions of the present invention is established respectively 5 concentration level (units: mg/kg, 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 processed 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 crown-block type atomizing tester of adjustable speed, the conventional spray method in simulation field.Shower nozzle is Fan spray head, and model is the Teejer8002E type, 40 kg/acres 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 liter/mins of flows.
4, Herbicidal combinations safety of the present invention detects
After the dispenser 2 days, investigation is respectively processed 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 process the paddy rice fresh weight, calculate the fresh weight inhibiting rate, with 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 (such as growth inhibition, chlorosis, deformity etc.) of dispenser detail record weeds after 2 days, behind medicine 20 days, the weeds fresh weight is respectively processed 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 processing of Herbicidal combinations of the present invention is all normal, does not have obvious symptom of chemical damage; Slight symptom of chemical damage all appears in each weeds of processing 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 processed after 20 days after the dispenser is without obvious inhibitory action, only slightly when high concentration 1000mg/kg processes paddy rice suppresses growth; The weeds that each ratio of Herbicidal combinations of the present invention and each concentration are processed 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 high concentration is processed 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
Result's demonstration, 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, air-flow crushing, 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, air-flow crushing, 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 be watered 40 kg/acres and spray in the rice field, the 10th day, the 30th day and maturing stage range estimation Security of rice 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 is to rice safety, without obvious symptom of chemical damage among the embodiment 6; The preventive effect of weeds, reached more than 80% in 10 days after 15 g/acres of 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 g/acres, with wherein a kind of active ingredient comparison of independent use, enlarged the herbicide spectrum, broad leaved weed and sedge weed have been had obvious synergistic effect.A dispenser can be controlled the weeds of crop in whole vegetative period, and not only herbicidal effect is remarkable, and environmentally friendly, and is without impact, little to the pollution of environment on second stubble crop, to people, animal, birds and beneficial organism safety, is conducive to keep 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 preferred embodiment 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, is comprised of cyhalofop-butyl and flufenacet, and the mass ratio of described cyhalofop-butyl and flufenacet is 1:1-3.
2. described Herbicidal combinations according to claim 1 is characterized in that, the mass ratio of described cyhalofop-butyl and flufenacet is 1:1.5-2.5.
3. described Herbicidal combinations according to claim 2 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 comprised 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 emulsifiable concentrate.
7. weed killer herbicide according to claim 4 is characterized in that, it is oil-suspending agent.
8. weed killer herbicide according to claim 4 is characterized in that, it is wetting powder.
9. weed killer herbicide according to claim 4 is characterized in that, it is water dispersible granules.
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