CN105104388B - A kind of maize post-emergence compound herbicide containing topramezone, clopyralid and atrazine - Google Patents
A kind of maize post-emergence compound herbicide containing topramezone, clopyralid and atrazine Download PDFInfo
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- CN105104388B CN105104388B CN201510608683.3A CN201510608683A CN105104388B CN 105104388 B CN105104388 B CN 105104388B CN 201510608683 A CN201510608683 A CN 201510608683A CN 105104388 B CN105104388 B CN 105104388B
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- topramezone
- atrazine
- clopyralid
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Abstract
The invention discloses a kind of maize post-emergence compound herbicide containing topramezone, clopyralid and atrazine, it is characterised in that：It is 0.1 70 by weight by topramezone, clopyralid and atrazine that the active component of the complex weedicide, which is,：0.1‑70：0.1 80 compositions.Complex weedicide of the present invention can prevent and kill off corn field annual gramineous weed, and can prevents and kill off broad leaved weed and nutgrass flatsedge, herbicidal effect is notable, have significant synergies, and a dispenser can prevent and kill off the weeds in crop whole breeding time, it is a kind of preferable herbicide on succession crop without influence.
Description
Technical field
The present invention relates to technical field of pesticide, and in particular to a kind of jade containing topramezone, clopyralid and atrazine
Rice post-emergence complex weedicide.
Technical background
Corn is both the important cereal crops in China, and important forage crop.In recent years, with animal husbandry, food
The development of the industries such as processing, wine brewing and biodiesel, the market demand of corn are continuously increased.China's maize sown area is only second to
Rice, turn into second largest long-term cropping, and also increased trend.But the weeds of corn field occur generally, and species is various, and
Maize at Seedling Stage is the most serious by crop smothering, and serious, crop smothering occurring area Zhan Gai areas growing surface such as occurs in Huang-Huai-Hai summer corn crop smothering
Long-pending 82%~96%, wherein medium above hazard area is up to 64~66%.When Maize Seedling is by Weed infestation, plant is short and small,
Bar spire is yellow, causes middle and later periods corn growth bad, Severe Reduction.With the development of agricultural cience and farming techniques, chemical herbicide
Popularization and application are as one of saving of labor, time saving, cost-effective strong well stimulation.The chemical prevention of corn field weed exists mostly
Broadcast rear two critical periods progress of before seedling and after seedling early stage.At present, corn herbicide kind is more, wherein representative has
The kind of Control Weeds in Maize Field has nicosulfuron and mesotrione.But nicosulfuron has poisoning to some corn varieties,
Although mesotrione is good to the security of corn, less desirable to grassy weed effect.
Topramezone biggest advantage is exactly security, and it has good selectivity to most of corn, including
Ordinary maize, Sweety and waxy corn, pop corn.It can be applied whole growth period after maize seedling, and conventional corn postemergence weed control
Agent only uses before the leaf phase of corn 2, and medication is then dangerous to corn after the leaf phase of corn 6.Therefore it has than conventional herbicide after seedling
There is broader validity period, peasant household can be allowed in appropriate weeds emergence, dispenser when farming season.Topramezone and atrazine etc.
There is mixed compatibility well.But because the atrazine lasting period is grown, it is harmful to late stubble sensitive crop wheat, soybean, rice etc.,
Lasting period was up to 2-3 months；But if atrazine dosage is excessive, herbicide carryover is had to second stubble crop.If dosage is too small, rise again
Less than synergistic effect.
In addition, topramezone has good preventive effect to most of annual corn field common weeds, especially grassy weed
In addition, and when being used cooperatively with Atrazine, then dead careless speed is accelerated, and alphosis substantially occur in 2-4 days weeds, in 2 weeks
Weeds are thoroughly dead, have preferable prevention effect to the big grass in evening corn dispenser phase, and the malignant weed such as dayflower, acalypha copperleaf.
And its lasting period is grown, the check and control grass phase mixed with Atrazine can reach more than 35 days.
Clopyralid (Clopyralid) is a kind of artificial synthesized auxin, its chemical constitution and many
Natural auxin is similar, but has more preferable persistence in the tissue of plant.It mainly by the root of plant and
Leaf absorb and then conducted in plant, so its conductive performance is stronger.After weeds dispenser, it is by the leaf of plant
Piece or root absorption, moved up and down in plant and be transmitted to whole plant rapidly.Inner sucting conduction type herbicide after seedling.To miscellaneous
After careless dispenser, by blade or root absorption, divided a word with a hyphen at the end of a line up and down in plant, pass to whole plant, the effect machine of its herbicide rapidly
It is made as promoting the formation of plant nucleic acid, produces excessive ribonucleic, cause root growth excessive, stem and leaf growth deformity, supports
Divide consumption, vascular bundle transporting function is obstructed, and causes weeds dead.
The content of the invention
It is an object of the invention to provide one kind can prevent and kill off grassy weed, and and can prevents and kill off broad leaved weed and nutgrass flatsedge, and right
A kind of maize post-emergence compound herbicide containing topramezone, clopyralid and atrazine of succession crop safety.Overcome with
The defects of upper two patents.
In order to realize foregoing invention purpose, the present invention provides following technical scheme：
A kind of maize post-emergence compound herbicide containing topramezone, clopyralid and atrazine, the complex weedicide
Active component is by weight being 0.1-70 by topramezone, clopyralid and atrazine：0.1-70：0.1-80 is formed.
Further scheme, the weight ratio of the topramezone, clopyralid and atrazine is 1.5-4：10-30:25-
60。
Further, the weight ratio of the topramezone, clopyralid and atrazine is 2-3：15-20:25-40.
Further, the weight of the topramezone, clopyralid and atrazine and after-seedling herbicide for maize gross weight is accounted for
The 0.5~85% of amount.
The formulation of the complex weedicide is that dispersible oil-suspending agent, suspending agent, suspension emulsion, wettable powder or moisture dissipate
Granula.
Also include vegetable oil in the complex weedicide, its dosage is 20-200 milliliters/mu.
The vegetable oil is at least one of soybean oil, corn oil, sunflower oil, rapeseed oil, castor oil, methyl oleate；
The vegetable oil consumption is 50-100 milliliters/mu.
Vegetable oil is used as synergist in the present invention, and it can now mix current, its use with the complex weedicide of the present invention
Amount is mixed according to 20-200 milliliters/mu with the complex weedicide of the present invention, is remarkably improved herbicidal effect.
With the synergy after Sun Yunpei co-toxicity coefficient method evaluation mixture, topramezone, clopyralid are as a result shown
2 are pressed with three kinds of active components of atrazine：15-20:20-35：The co-toxicity coefficient of ratio compounding is significantly greater than 120, reaches notable increasing
Effect acts on, and illustrates three kinds of topramezone, clopyralid and atrazine active components by 2：15-20:20-35 ratios mixture is more
Properly, annual single broadleaf weed and nutgrass flatsedge are had significant synergies.
Security test experiment to corn shows that three kinds of topramezone, clopyralid and atrazine active components are answered
With cauline leaf process, the ED of suppression corn growth 10%10=2896.46, suppress the ED of weed growth 90%90=575.31, selection
Property coefficient=2896.46/575.31=5.03>2, it is believed that the medicament has obvious selectivity, topramezone, clopyralid
There is good security to corn with three kinds of active components of atrazine.
Complex weedicide of the present invention was shown by the field control effectiveness test of 2 years, in the leaf phase of corn 3~5, weeds 2-5
Leaf does not wait the phase, and corn has no symptom of chemical damage from dispenser to maturity period, to corn safety.The preventive effect of weeds reach within 10 days 80% with
On, reach more than 90% within 30 days, with the increase of dosage, preventive effect is remarkably reinforced, and a dispenser can control crop entirely to give birth to
Weeds in long-term, not only herbicidal effect is notable, and environmentally friendly, on second stubble crop without influence.
Compared with prior art, complex weedicide of the present invention can prevent and kill off grassy weed, and it is miscellaneous that and can prevents and kill off broad-leaved
Grass and nutgrass flatsedge, have a good application prospect to corn safety, and on succession crop without influence.
Embodiment
The invention discloses a kind of maize post-emergence compound herbicide containing topramezone, clopyralid and atrazine, sheet
Art personnel can use for reference present disclosure, be suitably modified technological parameter realization.In particular, it is all similar
Replace and change apparent to those skilled in the art, they are considered as being included in the present invention.The present invention's
Product and application are described by preferred embodiment, and related personnel can substantially not depart from present invention, spirit
Method described herein and application are modified or suitably changed with combining with scope, to realize and using skill of the present invention
Art.
With reference to embodiment, the present invention is expanded on further：
Embodiment 1：The 37% dispersible oil-suspending agent (topramezone of topramezone clopyralid atrazine：Dichloro
Pyridine acid：Atrazine=2：15:20)
Take 2kg topramezones, 15kg clopyralids, 20kg atrazines, 8kg Pluronic125,5kg propane diols, 8kg
Xanthans, 1kg methylated vegetable oils, water complement to 100kg.By being sufficiently mixed allotment, ball mill grinding, adjusting, be packaged to be
Dispersible oil-suspending agent.
Embodiment 2：53% topramezone clopyralid atrazine suspending agent (topramezone：Clopyralid：Green bristlegrass
Go to Tianjin=3：20:30)
Take 3kg topramezones, 20kg clopyralids, 30kg atrazines, 8kg sodium lignin sulfonates (dispersant), 5kg fat
Fat alcohol APEO (wetting agent), 1kg xanthans (thickener), 2kg polyoxyethylene polyoxy propyl alcohol amidogen ethers (defoamer), 5kg
Ethylene glycol (antifreezing agent), carrier water 26kg.By being sufficiently mixed allotment, ball mill grinding, adjusting, be packaged to be suspending agent.
By being sufficiently mixed allotment, ball mill grinding, adjusting, be packaged to be suspending agent.
Embodiment 3：76.5% topramezone clopyralid atrazine water dispersible granule (topramezone：Dichloro pyrrole
Pyridine acid：Atrazine=1.5：30:45=1:20:30)
Take 1.5kg topramezones, 30kg clopyralids, 45kg atrazines, 7kg D-425,5kg EFW, 5kg sulfuric acid
Ammonium, 2kg polyethylene glycol, kaolin supply 100%, be adequately mixed, air-flow crushing, mixing, granulation, drying and screening obtain water
Dispersible granule.
Embodiment 4：64% topramezone clopyralid atrazine wettable powder (topramezone：Dichloropyridine
Acid：Atrazine=4：10:50)
Take 4kg topramezones, 10kg clopyralids, 50kg atrazines, the poly- second two of 7kg D-425,5kg EFW, 2kg
Alcohol, kaolin supply 100%, are adequately mixed, air-flow crushing is dried to obtain wettable powder.
Embodiment 5：70% topramezone clopyralid atrazine wettable powder
(topramezone：Clopyralid：Atrazine=5：5:60)
Take 5kg topramezones, 5kg clopyralids, 60kg atrazines, 7kg D-425,5kg EFW, 2kg polyethylene glycol,
Kaolin supplies 100%, is adequately mixed, air-flow crushing is dried to obtain wettable powder.
Embodiment 6：75% topramezone clopyralid atrazine water dispersible granule (topramezone：Dichloropyridine
Acid：Atrazine=5：20:50)
Take 5kg topramezones, 20kg clopyralids, 50kg atrazines, 7kg D-425,5kg EFW, 5kg ammonium sulfate,
2kg polyethylene glycol, kaolin supply 100%, be adequately mixed, air-flow crushing, mixing, granulation, drying and screening obtain moisture
Shot agent.
Embodiment 7：Topramezone, clopyralid and atrazine cauline leaf process synergy toxicity determination test report
Accuse
1 test objective
Under greenhouse experiment, using pot-culture method, research topramezone, clopyralid and atrazine ternary built
Herbicidal effect, and with Sun Yunpei co-toxicity coefficient method evaluate three's different proportion it is mixed after synergy type, be benzene azoles
The rational mixture of humulone, clopyralid and atrazine provides scientific basis.
2 experimental conditions
2.1 for studying thing corn variety：Zheng Dan 958
2.2 for examination weeds lady's-grass (Digitaria sanguinalis (Linn.) Scop.), green bristlegrass (Setaria
Viridis (L.) Beauv.), acalypha copperleaf (Acalypha australis L.), lamb's-quarters (Chenopodium album L.) is different
Type nutgrass flatsedge (Cyperus difformis L.) (field harvesting upper one year seed, germination percentage is more than 85%).
2.3 experimental conditions and the culture for trying material
The culture of test material, 25-35 DEG C of temperature are carried out in illumination cultivation room.A diameter of 15cm is chosen, is highly
The permeable hole of 1cm diameters is beaten in 15cm vinyon basin alms bowl, the bottom of basin alms bowl.Permeable hole is covered with double-layer filter paper, and alms bowl is built-in
Enter to prepare in advance the loam that sterilized at the high 10cm of alms bowl, be impregnated with soil from bottom with clear water.During experiment, by every kind of weed seed
30-40 grains are uniformly put into basin, earthing 0.5cm, and weeds should supplement moisture needed for growth during cultivating.
2.4 other conditions
The regular moisturizing (not watered in 2 days after medicine) in a manner of bottom is seeped water, keeps soil moisture.
3 experimental designs
3.1 medicament
3.1.1 reagent agent
97% topramezone active compound (BASF European Co., Ltd)；
95% clopyralid active compound (Anhui Fengle Agricultural Co., Ltd)；
92% atrazine active compound (Xuanhua Agriculture Chemicals Co., Ltd., Hebei).
3.1.2 reagent agent drug solution preparing
Quantitative active compound is weighed with electronic balance, adds appropriate emulsifying agent, with acetone solution, finally with 0.1% soil
Above-mentioned active compound is diluted to required concentration by warm 80 aqueous solution.
3.1.3 experimental design
3.1.3.1 the synergy of topramezone and atrazine
Topramezone, atrazine single dose and 5 topramezones and atrazine mixture preparation are set into 5 dosage respectively, separately set
Blank control, each test process are repeated 4 times.Treatment agent dosage refers to table 1.
The test process of table 1 and test level (concentration ga.i./kg)
3.1.3.2 the synergy of the optimal mixture of topramezone, atrazine and atrazine
Topramezone atrazine mixture, clopyralid single dose and 5 mixture preparations are set into 5 dosage respectively, separately set
Blank control, each test process are repeated 4 times.Treatment agent dosage refers to table 2.
The test process of table 2 and test level (concentration ga.i./kg)
3.2 application method
3.2.1 application method
In the leaf phase of corn 3, weeds 2-4 leaf phase cauline leaf spraying treatments.Spray is tried using the indoor crown-block type spraying of adjustable speed
Experiment device, simulate field conventional spraying methods.Shower nozzle is Fan spray head, model Teejer8002E types, 40 kilograms of spray value/
Mu.0.5 meter of spray height, 0.7 meter of spraying swath, the meter per second of leg speed 0.224.2.0 MPas of atomisation pressure, 697 liters/min of flow.
3.2.2 spraying time and number
Test and carry out reagent spray processing, dispenser 1 time on June 2nd, 2014.
4 investigation methods
Record corn and the damage symptoms of weeds, 20d after medicine in detail after dispenser, carry out fresh weight measurement, and and control treatment
Compare, calculate fresh weight preventive effect.
4.1 synergy assay methods
Synergy type of the result of the test with Sun Yunpei co-toxicity coefficient method evaluation after mixed.
According to SUN, Y-P (Sun Yunpei) method calculates its actual toxicity index, mixture theoretical toxicity index, co-toxicity coefficient.With
Log concentration is X, and pest and disease damage preventive effect probit value is Y, seeks regression equation.
Actual toxicity index=standard agent LD50The LD of/mixture50×100
Theoretical toxicity index=∑ (percentage of the medicament active ingredient of the toxicity index of reagent agent × in mixture)
Actual toxicity index/theoretical toxicity index × 100 of co-toxicity coefficient=mixture
Using topramezone, atrazine as standard agent in experiment.
Criterion：Co-toxicity coefficient<80 be antagonism, is summation action between 80-120,>120 be that synergy is made
With.
5 results and analysis
The synergy of 5.1 topramezones and atrazine
5.1.1 fresh weight preventive effect of the topramezone with atrazine mixture to weeds
Fresh weight preventive effect of the topramezone of table 3 with 20d after atrazine mixture medicine to weeds
Prevention effect is the average value of four data in table.
5.1.2 topramezone and synergy of the atrazine mixture to weeds
As shown in Table 3：Toxic action situation and preventive effect of the medicament to weeds.Its respective virulence is calculated by DPS softwares
Regression equation, LD50, actual toxicity index, theoretical toxicity index and co-toxicity coefficient.It is listed in table 4.
Table 4：Topramezone and synergy of the atrazine mixture to weeds
| Processing | Regression equation | Coefficient correlation | LD50 | Actual toxicity index | Theoretical toxicity index | Coefficient of synergism |
| A | Y=1.7826x+8.0486 | 0.9951 | 0.0195 | 7707.69 | / | / |
| B | Y=2.0079x+4.6447 | 0.9909 | 1.5030 | 100 | / | / |
| C | Y=1.3803x+5.8243 | 0.9983 | 0.2528 | 594.54 | 285.55 | 208.21 |
| D | Y=1.4985x+6.2273 | 0.9981 | 0.1517 | 990.77 | 392.60 | 252.36 |
| E | Y=1.9839x+7.0270 | 0.9997 | 0.0951 | 1580.44 | 547.51 | 288.66 |
| F | Y=1.8939x+6.8723 | 0.9997 | 0.1027 | 1463.49 | 791.61 | 184.88 |
| G | Y=1.9051x+6.8543 | 0.9996 | 0.1063 | 1413.92 | 1149.34 | 123.02 |
| H | Y=1.8952x+6.8281 | 0.9994 | 0.1085 | 1385.25 | 1621.54 | 85.43 |
From experiment, processing C, D, E, F, G, H co-toxicity coefficient are respectively：208.21、252.36、288.66、
184.88th, 123.02,85.43, co-toxicity coefficient is all higher than 80, has addition or synergistic effect.Wherein, C, D, E, F, G are handled
Co-toxicity coefficient is more than 120, has synergistic effect, that is to say, that and topramezone is in 1.5-4, atrazine mixture in the range of 25-60,
It is respectively provided with synergistic effect.
The co-toxicity coefficient for particularly handling E is up to 288.66, has notable synergistic effect.
The synergy of the optimal mixture of 5.2 topramezones, atrazine and clopyralid
5.2.1 the topramezone atrazine fresh weight preventive effect to weeds mixed with clopyralid
The topramezone atrazine of the table 5 fresh weight preventive effect to weeds mixed with clopyralid
Prevention effect is the average value of four data in table.
5.2.2 the topramezone atrazine indoor virulence and synergy to weeds mixed with clopyralid
As shown in Table 5：Toxic action situation and preventive effect of the medicament to weeds.Its respective toxicity regression is calculated by formula
Equation, LD50, actual toxicity index, theoretical toxicity index and co-toxicity coefficient.It is listed in table 6.
Table 6：Topramezone atrazine to the indoor virulence of weeds and combines work with clopyralid difference mixed ratio
With
| Processing | Regression equation | Coefficient correlation | LD50 | Actual toxicity index | Theoretical toxicity index | Coefficient of synergism |
| A | Y=1.8266x+6.7238 | 0.9940 | 0.1138 | 100 | / | / |
| B | Y=1.1822x+5.5149 | 0.9924 | 0.3668 | 31.03 | / | / |
| C | Y=1.7833x+6.7012 | 0.9933 | 0.1112 | 102.34 | 74.45 | 137.46 |
| D | Y=1.8291x+6.7762 | 0.9964 | 0.1069 | 106.45 | 67.68 | 157.28 |
| E | Y=1.8390x+6.8018 | 0.9957 | 0.1048 | 108.59 | 62.72 | 173.13 |
| F | Y=1.7371x+6.6167 | 0.9930 | 0.1173 | 97.02 | 58.95 | 164.58 |
| G | Y=1.6859x+6.5041 | 0.9913 | 0.1282 | 88.77 | 55.98 | 158.57 |
From experiment, processing C, D, E, F, G co-toxicity coefficient are respectively：137.46、157.28、173.13、164.58、
158.57, its co-toxicity coefficient is all higher than 120, has synergistic effect；Wherein E co-toxicity coefficient is maximum, is 173.13, reaches notable
Synergistic effect.
6 overall merits
Shown by above synergy measurement result, topramezone, clopyralid and atrazine three are with 1.5-4：10-
30:25-60 ratio compounding has preferable prevention effect to corn field weed.
Embodiment 8：76.5% topramezone clopyralid green bristlegrass WG (topramezones：Clopyralid：Atrazine=
1.5：30:45=1:20:30) security indoor measurement test report of the cauline leaf process to corn
1 test objective
Under greenhouse experiment, using pot-culture method, research topramezone, clopyralid and atrazine ternary built
For cauline leaf process to the security of corn, the rational mixture for topramezone, clopyralid and atrazine provides scientific basis.
2 experimental conditions
2.1 for studying thing corn variety：Zheng Dan 958
2.2 for examination weeds lady's-grass (Digitaria sanguinalis (Linn.) Scop.), green bristlegrass (Setaria
Viridis (L.) Beauv.), concave head amaranth (Amaranthus ascendens Loisel.), lamb's-quarters (Chenopodium album
L.) (field harvesting upper one year seed, germination percentage is more than 85%).
2.3 experimental conditions and the culture for trying material
The culture of test material, 25-30 DEG C of temperature are carried out in illumination cultivation room.A diameter of 15cm is chosen, is highly
The permeable hole of 1cm diameters is beaten in 15cm vinyon basin alms bowl, the bottom of basin alms bowl.Permeable hole is covered with double-layer filter paper, and alms bowl is built-in
Enter to prepare in advance the loam that sterilized at the high 10cm of alms bowl, be impregnated with soil from bottom with clear water.During experiment, by corn seed 20
Grain, every kind of weed seed 30-40 grains are uniformly put into earthing 0.5cm in basin, are put into culture (25-30 DEG C), maize seedling in greenhouse
Moisture needed for growth should be supplemented during being cultivated with weeds.10 plants of healthy and strong seedlings are stayed after all sprouting, treat that maize seedling grows to 3~4 leaves and miscellaneous
Dispenser is handled when grass grows to 3~5.
2.4 other conditions
The regular moisturizing (not watered in 2 days after medicine) in a manner of bottom is seeped water, keeps soil moisture.
3 experimental designs
3.1 medicament
3.1.1 reagent agent
97% topramezone active compound (BASF European Co., Ltd)；
95% clopyralid active compound (Anhui Fengle Agricultural Co., Ltd)；
92% atrazine active compound (Xuanhua Agriculture Chemicals Co., Ltd., Hebei).
3.1.2 reagent agent drug solution preparing
Quantitative active compound is weighed with electronic balance, adds appropriate emulsifying agent, with acetone solution, finally with 0.1% soil
Above-mentioned active compound is diluted to required concentration by warm 80 aqueous solution.
3.2 application method
3.2.1 application method
In the leaf phase of corn 3, weeds 2-4 leaf phase cauline leaf spraying treatments.Spray is tried using the indoor crown-block type spraying of adjustable speed
Experiment device, simulate field conventional spraying methods.Shower nozzle is Fan spray head, model Teejer8002E types, 40 kilograms of spray value/
Mu.0.5 meter of spray height, 0.7 meter of spraying swath, the meter per second of leg speed 0.224.2.0 MPas of atomisation pressure, 697 liters/min of flow.
3.2.2 spraying time and number
Test and carry out reagent spray processing, dispenser 1 time on June 2nd, 2015.
4 investigation and computational methods
4.1 crops are investigated
After dispenser, each processing corn of investigation whether there is symptom of chemical damage, detailed record symptom of chemical damage, grade if having, 20 after medicine
My god, each processing corn fresh weight is measured, calculates fresh weight inhibition, the security with clear and definite test medicine to corn.
4.2 weedy rices
The damage symptoms (such as growth inhibition, chlorosis, deformity) of weeds are recorded after dispenser in detail, 20 days after medicine, are weighed
Each processing weeds aerial part fresh weight, calculate the fresh weight preventive effect of weeds.
4.3 computational methods
Regression analysis is carried out to the logarithm value of drug dose and the niqueMin of corn fresh weight inhibition with DPS softwares, calculated
Dosage ED when coefficient correlation and suppression crop 10%10, and suppress weeds 90%ED90, obtain selectivity index.
Selectivity index=ED10/ED90
5 results and analysis
Security of the 5.1 topramezone clopyralid atrazine cauline leaf process to corn
After dispenser 5 days observe, topramezone clopyralid green bristlegrass high concentration 4000mg/kg process parts corn nor
Chang Anquan, plant height is normal, and other concentration processing corn growing ways are not distinguished significantly normally with blank control processing.
The activity of weeding of table 1 and crop safety ocular estimate evaluation criterion
Inhibitory action of the topramezone clopyralid green bristlegrass WG of table 2 76.5% to corn
Fresh weight preventive effects of the topramezone clopyralid green bristlegrass WG of table 3 76.5% to weeds
As shown in Table 3：The medicament calculates its each toxicity regression to the toxic action situation and preventive effect of weeds by formula
Equation, LD50, it is listed in table 4.
Table 4：Virulence regression equation and LD50
| Processing | Regression equation | Coefficient correlation | LD50 | 95% confidential interval |
| A | Y=-1.2503+2.7290x | 0.9974 | 195.1217 | 179.5167~212.0831 |
As shown in Table 4：76.5% topramezone clopyralid green bristlegrass WG LD50For：195.1217 95% confidence area
Between be 179.5167~212.0831.I.e. this result of the test shows, topramezone clopyralid green bristlegrass cauline leaf process is normal
4 times of processing of concentration are also very safe to corn, and corn growth is normal.
, can be in the hope of the ED of suppression corn growth 10% by DPS softwares by table 2, table 310=2896.46, suppress weeds
The ED of growth 90%90=575.31, selectivity factor=2896.46/575.31=5.03>2, it is believed that the medicament has obvious
Selectivity, can carry out field control effectiveness test.
Embodiment 9：Field control effectiveness test
Complex weedicide of the present invention was shown by the field control effectiveness test of 2 years, in the leaf phase of corn 3~5, weeds 1~5
Leaf does not wait the phase, utilizes 42% benzene azoles dichloro green bristlegrass dispersible oil-suspending agent (the dichloro pyrrole of 2% topramezone+15% of the present invention
+ 25% atrazine of pyridine acid), its dosage is respectively 80,100,120,200 milliliters/mu, and is watered 40 kgs/acre and sprays, and 10,30
It and maturity period estimate corn safety and Weed-control effect, survey all preventive effects within 10,30 days, as a result such as following table：
By range estimation, corn has no symptom of chemical damage from dispenser to maturity period, to corn safety.80 milliliters of the preventive effect of weeds/
Mu reaches more than 75.3% for 10 days, reaches more than 90.5% within 30 days, with the increase of dosage, preventive effect is remarkably reinforced, in corn
Milliliter/mu of field 100 can reach good herbicidal effect, compared with one of which active ingredient is used alone, expand herbicide
Spectrum, has obvious synergistic effect to broad leaved weed and nutgrass flatsedge.Dispenser can control the weeds in crop whole growth period,
Not only herbicidal effect is notable, and environmentally friendly, and on second stubble crop without influence, the pollution to environment is small, to people, animal, birds
And beneficial organism safety, be advantageous to keep ecological balance.In addition, the herbicide of the present invention is processed using physical method, work is produced
Skill is simple, three-waste free discharge in production process, ecological environment is had no adverse effects.It is that current prevention effect preferably compounds weeding
Agent.
Embodiment 10：Field control effectiveness test
Complex weedicide of the present invention was shown by the field control effectiveness test of 2 years, in the leaf phase of corn 3~5, weeds 1~5
Leaf does not wait the phase, utilizes the 64% topramezone clopyralid atrazine wettable powder (topramezone of the present invention：Dichloro
Pyridine acid：Atrazine=4：10:50), its dosage is respectively 40,50,60,100 grams/acre, and is watered 40 kgs/acre and sprays, 10,
30 days and maturity period range estimation corn safety and Weed-control effect, survey all preventive effects in 10,30 days, as a result such as following table：
By range estimation, corn has no symptom of chemical damage from dispenser to maturity period, to corn safety.80 milliliters of the preventive effect of weeds/
Mu reaches more than 75.3% for 10 days, reaches more than 90.5% within 30 days, with the increase of dosage, preventive effect is remarkably reinforced.With it is independent
Compared using one of which active ingredient, expand herbicide controlling spectrum, there is obvious synergistic effect to broad leaved weed and nutgrass flatsedge.Especially
To add after soybean oil, hence it is evident that strengthen to the preventive effects of weeds, 50 grams/acre of corn field add 100 milliliters of soybean oils/
Mu, can reach unexpected preventive effect, a dispenser can control the weeds in crop whole growth period, not only weeding
Significant effect, and it is environmentally friendly, and on second stubble crop without influence, the pollution to environment is small, to people, animal, birds and has prebiotic
Thing safety, is advantageous to keep ecological balance.In addition, the herbicide of the present invention is processed using physical method, simple production process is raw
Three-waste free discharge during production, has no adverse effects to ecological environment.It is the preferable complex weedicide of current prevention effect.
Described above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (6)
- A kind of 1. maize post-emergence compound herbicide containing topramezone, clopyralid and atrazine, it is characterised in that：The compounding The active component of herbicide is by weight being 1.5-4 by topramezone, clopyralid and atrazine：10-30：25-60.
- 2. complex weedicide according to claim 1, it is characterised in that：The topramezone, clopyralid and green bristlegrass are gone The weight ratio in Tianjin is 2-3：15-20：25-40.
- 3. complex weedicide according to claim 1, it is characterised in that：The topramezone, clopyralid and green bristlegrass are gone The weight in Tianjin and account for the 0.5~85% of after-seedling herbicide for maize gross weight.
- 4. according to the complex weedicide described in claim any one of 1-3, it is characterised in that：The formulation of the complex weedicide is Suspending agent, suspension emulsion, wettable powder or water dispersible granules.
- 5. according to the complex weedicide described in claims any one of 1-3, it is characterised in that：Also wrapped in the complex weedicide Vegetable oil is included, its dosage is 20-200 milliliters/mu.
- 6. according to the complex weedicide described in claims 5, it is characterised in that：The vegetable oil is soybean oil, corn oil, certain herbaceous plants with big flowers At least one of caul-fat, rapeseed oil, castor oil, methyl oleate；The vegetable oil consumption is 50-100 milliliters/mu.
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| CN101617653B (en) * | 2008-07-02 | 2013-06-26 | 山东滨农科技有限公司 | Compound herbicide composition |
| CN101617675A (en) * | 2008-07-02 | 2010-01-06 | 山东滨农科技有限公司 | Herbicide composition |
| CN102265850B (en) * | 2010-06-04 | 2013-09-18 | 南京华洲药业有限公司 | Weeding composition containing bentazone, clopyralid and atrazine, and application thereof |
| CN103181391A (en) * | 2011-12-30 | 2013-07-03 | 山东滨农科技有限公司 | Herbicide composition comprising topramezone and atrazine |
| CN103141487A (en) * | 2013-02-05 | 2013-06-12 | 辽宁海佳农化有限公司 | Herbicide composition containing carfentrazone-ethyl, fluroxypyr and atrazine and preparation method |
| CN103503884B (en) * | 2013-10-12 | 2015-04-01 | 河北省农林科学院粮油作物研究所 | Topramezone*clopyralid composite corn field herbicide |
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