CN104855394B - A kind of Weeding composition applied in post-emergence period of corn containing topramezone - Google Patents
A kind of Weeding composition applied in post-emergence period of corn containing topramezone Download PDFInfo
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- CN104855394B CN104855394B CN201510268093.0A CN201510268093A CN104855394B CN 104855394 B CN104855394 B CN 104855394B CN 201510268093 A CN201510268093 A CN 201510268093A CN 104855394 B CN104855394 B CN 104855394B
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- topramezone
- pethoxamid
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Abstract
The invention discloses a kind of Weeding composition applied in post-emergence period of corn containing topramezone, the active ingredient of the Herbicidal combinations includes topramezone and pethoxamid, and the weight ratio of the topramezone and pethoxamid is 0.1 70：0.1‑80.Also include atrazine, the weight ratio of the topramezone, pethoxamid and atrazine is 0.1 70：0.1‑80:0.1‑80.Herbicidal combinations of the invention can prevent and kill off corn field annual gramineous weed and can prevent and kill off broad leaved weed and nutgrass flatsedge again, 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 Weeding composition applied in post-emergence period of corn containing topramezone.
Technical background
Corn is both the important cereal crops of China, is also important forage crop.In recent years, with animal husbandry, food
The development of the industries such as processing, wine-making industry and biodiesel, the market demand of corn is continuously increased.China's corn planting face in 2012
Product is only second to paddy rice up to 3994.9 ten thousand hectares, as second largest long-term cropping, and also increased trend.Corn field it is miscellaneous
Grass occurs generally, and species is various, occurs seriously in Huang-Huai-Hai summer corn crop smothering, crop smothering occurring area Zhan Gai areas cultivated area
82%~96%, wherein medium above hazard area is up to 64~66%.Maize at Seedling Stage is the most serious by crop smothering, in corn growth
Influence of the later stage weeds to yield is little.When Maize Seedling receives Weed infestation, plant is short and small, bar spire yellow, causes the middle and later periods beautiful
Rice undergrowth, Severe Reduction.
With the development of agricultural cience and farming techniques, the popularization and application of chemical herbicide are as saving of labor, time saving, cost-effective
One of strong well stimulation.Before seedling and after seedling two critical periods of early stage enter after broadcasting mostly for the chemical prevention of corn field weed
OK, before the leaf phase of corn 2, medication is dangerous after 6 leaf phases for ordinary maize herbicide after seedling.At present, corn herbicide kind is more,
The wherein representative kind for having Control Weeds in Maize Field has nicosulfuron and mesotrione.But nicosulfuron is to having
A little corn varieties have poisoning, and mesotrione is good to corn safety, but less desirable to grassy weed effect.
Topramezone (bud is defended) biggest advantage is exactly security, and it has good selection to most of corn
Property, including ordinary maize, Sweety and waxy corn, pop corn；And can be applied whole growth period after maize seedling.In addition, bud defends right
Most of annual corn field common weeds, especially grassy weed, there is good preventive effect；Bud defends addition Atrazine, dead grass
Speed is accelerated, and alphosis substantially occur in 2-4 days weeds, and interior weeds are thoroughly dead within 2 weeks, to the big grass in evening corn dispenser phase, with
And dayflower, the malignant weed such as acalypha copperleaf has preferable prevention effect.3rd advantage is the lasting period long, and bud is defended mixed Aunar and drawn
Tianjin, the control careless phase can reach more than 35 days；It has broader validity period than conventional herbicide after seedling, can allow peasant household appropriate
Weeds emerge, dispenser when farming season.Have mixed compatible well with atrazine etc..But due to the atrazine lasting period
Long, harmful to late stubble sensitive crop wheat, soybean, paddy rice etc., the lasting period was up to 2-3 month.
Topramezone and atrazine, if atrazine consumption is excessive, herbicide carryover are had to second stubble crop.If agent
Amount is too small, and synergistic effect is not had again.
Pethoxamid is a kind of selective herbicide, for preventing and kill off corn and Soybean Field grass family and broad leaved weed.Pethoxamid
It is cell division inhibitor.The product is systemic herbicide, is absorbed by root and tender shoots, typically in early stage before bud or after bud
The grassy weed such as barnyard grass, lady's-grass and geniculate bristlegrass herb or root for preventing and kill off corn and Soybean Field, and the broad-leaved such as Amaranthus retroflexus, lamb's-quarters is miscellaneous
Grass, formulation rate is 1.0~2.4kg/hm2.Also complex preparation can be used, to improve the preventive effect to broad leaved weed.
The content of the invention
Grassy weed can be prevented and kill off it is an object of the invention to provide one kind, broad leaved weed and nutgrass flatsedge, and effect can be prevented and kill off again
Really good Weeding composition applied in post-emergence period of corn, and to the complex weedicide of succession crop safety.
In order to realize foregoing invention purpose, the present invention provides following technical scheme：
The active ingredient of the Herbicidal combinations includes the weight of topramezone and pethoxamid, the topramezone and pethoxamid
Amount is than being 0.1-70：0.1-80.
Further scheme, the active ingredient of the Herbicidal combinations also includes atrazine, the topramezone, pethoxamid and
The weight ratio of atrazine is 0.1-70：0.1-80:0.1-80.
Preferably, the weight ratio of topramezone, pethoxamid and atrazine is 1.2~2：15~40：15~40.
It is further preferred that the weight ratio of topramezone, pethoxamid and atrazine is 2：30:20-35.
On the other hand, the present invention provides topramezone, three kinds of work of pethoxamid and atrazine in the biological Herbicidal combinations
The quality and for the Herbicidal combinations gross mass 0.5~85% of property composition.
Preferably, in Herbicidal combinations of the present invention, topramezone, pethoxamid two kinds of active components or benzene azoles grass
After ketone, three kinds of active components of pethoxamid and atrazine are according to above-mentioned weight ratio compounding, can be made into and dispersible oil-suspending agent, suspend
The formulations of pesticide such as agent, suspension emulsion, wettable powder or water dispersible granules.
The synergy after mixture is evaluated with the co-toxicity coefficient method of Sun Yunpei, two kinds of topramezone and pethoxamid is as a result shown
Active ingredient presses 1.2:40、1.4:30、1.6:25、1.8:20、2:15 mixtures, and topramezone, pethoxamid and atrazine three
Plant active component and press 1.2:35:15、1.4:30:20、1.6:25：25、1.8:20：30、2：15：The co-toxicity coefficient of 40 ratios compounding
120 substantially are all higher than, notable synergistic effect is reached, illustrate two kinds of active ingredients of topramezone and pethoxamid by 1.2~2：15~
40 mixtures and topramezone, three kinds of active components of pethoxamid and atrazine press 1.2~2：15~40：15~40 ratio mixtures compared with
For suitable, annual single broadleaf weed and nutgrass flatsedge are had significant synergies.
Security test experiment to corn shows that topramezone, three kinds of active components of pethoxamid and atrazine compound stems
Leaf treatment, suppresses the ED of corn growth 10%10=3351.03, suppress the ED of weed growth 90%90=575.31, selectivity system
Number is selectivity factor=3351.03/575.31=5.82>2, it is believed that the medicament has obvious selectivity, topramezone, alkene
Three kinds of active components of careless amine and atrazine have good security to corn.
Herbicidal combinations of the present invention were 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 75.3% with
On, more than 90.5% is reached within 30 days, and with the increase of dosage, preventive effect is remarkably reinforced, in milliliter/mu of corn field 100
Good herbicidal effect is reached, is compared with one of which active ingredient is used alone, herbicide controlling spectrum is expanded, to broad leaved weed and Sha
Grass has obvious synergistic effect.Dispenser can control the weeds in crop whole growth period, and not only herbicidal effect is notable,
And it is environmentally friendly, on second stubble crop without influence.And it is small to the pollution of environment, to people, animal, birds and beneficial organism safety,
Be conducive to keeping ecological balance.In addition, herbicide of the invention is processed using physical method, simple production process, production process
Middle three-waste free discharge, has no adverse effects to ecological environment, is the preferable complex weedicide of current prevention effect.
Compared with prior art, complex weedicide of the present invention can prevent and kill off grassy weed, and it is miscellaneous to prevent and kill off broad-leaved again
Grass and nutgrass flatsedge, to corn safety, and on succession crop without influence, have a good application prospect.
Specific embodiment
The invention discloses one kind comprising topramezone, two kinds of active ingredients of pethoxamid or comprising topramezone, pethoxamid
With three kinds of Weeding composition applied in post-emergence period of corn of active component of atrazine, those skilled in the art can use for reference present disclosure, suitably
Modified technique parameter is realized.In particular, all similar replacements and change be for a person skilled in the art
It will be apparent that they are considered as being included in the present invention.Product of the invention and application are carried out by preferred embodiment
Description, related personnel substantially can not depart from present invention, spirit and scope to enter method described herein and application
Row is changed or suitably changed with combining and realizes and apply the technology of the present invention.
With reference to embodiment, the present invention is expanded on further：
Embodiment 1：16.2% topramezone pethoxamid dispersibles oil-suspending agent (topramezone：Pethoxamid=1.2：15)
Take 1.2kg topramezones, 15kg pethoxamids, 8kg Pluronic125,5kg propane diols, 8kg xanthans, 1kg first
Esterified vegetable oil, water complements to 100kg.By being sufficiently mixed allotment, ball mill grinding, adjusting, be packaged to be and dispersible oily suspension
Agent.
Embodiment 2：16.8% topramezone pethoxamid suspending agent (topramezone：Pethoxamid=1.8：15)
Take 1.8kg topramezones, 15kg pethoxamids, 8kg sodium lignin sulfonates, 5kg aliphatic alcohol polyethenoxies, 1kg xanthan
Glue, 2kg polyoxyethylene polyoxy propyl alcohol amidogen ethers, 5kg ethylene glycol, water complements to 100kg.Through being sufficiently mixed allotment, ball mill grinding,
Adjust, be packaged to be suspending agent.
Embodiment 3：42% topramezone pethoxamid water dispersible granules (topramezone：Pethoxamid=2：40)
Take 2kg topramezones, 40kg pethoxamids, 7kg D-425,5kg EFW, 5kg ammonium sulfate, 2kg polyethylene glycol, kaolinite
Soil supplies 100%, be adequately mixed, air-flow crushing, mixing, granulation, drying and screening obtain water dispersible granules.
Embodiment 4：17% topramezone pethoxamid wettable powder (topramezone：Pethoxamid=2：15)
Take 2kg topramezones, 15kg pethoxamids, 4kg dispersants NNO, 3kg wetting agent K12,4kg White Carbon black, lightweight carbonic acid
Calcium complements to 100kg.Be adequately mixed, air-flow crushing, mixing, obtain wettable powder.
Embodiment 5：42% topramezone pethoxamid atrazine dispersibles oil-suspending agent (topramezone：Pethoxamid：Green bristlegrass
Go to Tianjin=2：20:20)
Take 2kg topramezones, 20kg pethoxamids, 20kg atrazines, 8kg Pluronic125,5kg propane diols, 8kg xanthan
Glue, 1kg methylated vegetable oils, water complements to 100kg.By being sufficiently mixed allotment, ball mill grinding, adjusting, be packaged to be and can divide
Dissipate oil-suspending agent.
Embodiment 6：36.8% topramezone pethoxamid atrazine suspending agent (topramezone：Pethoxamid：Atrazine=
1.8：15:20)
Take 1.8kg topramezones, 15kg pethoxamids, 20kg atrazines, 8kg sodium lignin sulfonates, 5kg fatty alcohol polyoxy second
Alkene, 1kg xanthans, 2kg polyoxyethylene polyoxy propyl alcohol amidogen ethers, 5kg ethylene glycol, water complements to 100kg.By being sufficiently mixed tune
With, ball mill grinding, adjust, be packaged to be suspending agent.
Embodiment 7：61.5% topramezone pethoxamid atrazine water dispersible granule (topramezone：Pethoxamid：Green bristlegrass is gone
Tianjin=1.5：40:20)
Take 1.5kg topramezones, 40kg pethoxamids, 20kg atrazines, 7kg D-425,5kg EFW, 5kg ammonium sulfate, 2kg
Polyethylene glycol, kaolin supplies 100%, be adequately mixed, air-flow crushing, mixing, granulation, drying and screening obtain water-dispersible grain
Agent.
Embodiment 8：71.2% topramezone pethoxamid atrazine water dispersible granule (topramezone：Pethoxamid：Green bristlegrass is gone
Tianjin=1.2：30:40)
Take 1.2kg topramezones, 30kg pethoxamids, 40kg atrazines, 7kg D-425,5kg EFW, 5kg ammonium sulfate, 2kg
Polyethylene glycol, kaolin supplies 100%, be adequately mixed, air-flow crushing, mixing, granulation, drying and screening obtain water-dispersible grain
Agent.
Embodiment 9：32% topramezone pethoxamid atrazine wettable powder (topramezone：Pethoxamid：Atrazine
=2：15:15)
Take 2kg topramezones, 15kg pethoxamids, 15kg atrazines, 4kg dispersants NNO, 3kg the wetting agent white carbon of K12,4kg
Black, precipitated calcium carbonate complements to 100kg.Be adequately mixed, air-flow crushing, mixing, obtain wettable powder.
Embodiment 10：In topramezone, pethoxamid or topramezone, pethoxamid and atrazine cauline leaf process synergy room
Active determination test
Under greenhouse experiment, using pot-culture method, research topramezone, pethoxamid two-spot compounding or topramezone,
The herbicidal effect of pethoxamid and atrazine ternary built, and evaluated after three's different proportion uses with the co-toxicity coefficient method of Sun Yunpei
Synergy type, for the rational mixture of topramezone, pethoxamid and atrazine provides scientific basis.
For studying thing：Corn variety：Tuck in single No. 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%).
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 vinyon basin alms bowl of 15cm, the permeable hole of 1cm diameters is beaten in 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 sterilized at alms bowl 10cm high, soil is impregnated with from bottom with clear water.During experiment, by every kind of weed seed
30-40 is uniformly put into basin, earthing 0.5cm, and weeds should supplement moisture needed for growth during cultivating.
Reagent agent：97% topramezone active compound (BASF European Co., Ltd)；95% pethoxamid active compound (Anhui Feng Le agrochemical
Co., Ltd provides for oneself)；92% atrazine active compound (Xuanhua Agriculture Chemicals Co., Ltd., Hebei).
Weigh quantitative active compound with electronic balance, add 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.
Topramezone, pethoxamid single dose and 5 topramezones and pethoxamid mixture preparation are set into 5 dosage respectively, is separately set
Blank, 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)
Topramezone pethoxamid mixture, atrazine single dose and 5 mixture preparations are set into 5 dosage respectively, blank is separately set
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)
Respectively according to the dosage of each medicament in upper table 1,2 in the leaf phase of corn 3, weeds 2-4 leaf phase cauline leaf spraying treatments.Apply
The damage symptoms of corn and weeds are recorded after medicine in detail, 20d after medicine carries out fresh weight measurement, and compared with control treatment, calculated
Fresh weight preventive effect.
Synergy type of the result of the test with the co-toxicity coefficient method evaluation of Sun Yunpei after mixed.According to SUN, Y-P (Sun Yun
It is abundant) method calculates its actual toxicity index, mixture theoretical toxicity index, co-toxicity coefficient.With log concentration as X, Weed-control effect probability
It is Y to be worth, and seeks regression equation.
Actual toxicity index=standard agent LD50The LD of/mixture50×100
Theoretical toxicity index=∑ the percentage of the medicament active ingredient (toxicity index of reagent agent × in mixture)
Actual toxicity index/theoretical toxicity index × 100 of co-toxicity coefficient=mixture
With topramezone as standard agent in experiment.
Criterion：Co-toxicity coefficient<80 is antagonism, is summation action between 80-120,>120 make for synergy
With.
Topramezone is as shown in table 3 to the fresh weight preventive effect of weeds with pethoxamid mixture：
Fresh weight preventive effects of the 20d to weeds after the topramezone of table 3 and pethoxamid mixture medicine
Prevention effect is four average values of data in table.
As shown in Table 3：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 4.
Table 4：Topramezone and synergy of the pethoxamid mixture to weeds
From experiment, the co-toxicity coefficient for processing C, D, E, F, G is respectively：190.69、203.97、217.43、181.00、
147.43, co-toxicity coefficient is all higher than 120, and with synergistic effect, the co-toxicity coefficient for particularly processing E is 217.43 to the maximum, has
Notable synergistic effect, has significant synergies to annual single broadleaf weed and nutgrass flatsedge.
Embodiment 11：Topramezone pethoxamid atrazine cauline leaf process test report to the security indoor measurement of corn
Accuse
Under greenhouse experiment, using pot-culture method, research topramezone, pethoxamid and atrazine ternary built cauline leaf
The security to corn is processed, for the rational mixture of topramezone, pethoxamid and atrazine provides scientific basis.
In the leaf phase of corn 3, weeds 2-4 leaf phase cauline leaf spraying treatments, after dispenser, investigate each treatment corn whether there is poisoning disease
Shape, records symptom of chemical damage, grade in detail if having, and 20 days after medicine, measures each treatment corn fresh weight, calculates fresh weight inhibition, with
Specify security of the test medicine to corn.Damage symptoms (such as growth inhibition, chlorosis, the deformity of record weeds in detail after dispenser
Deng), in 20 days after medicine, each treatment weeds aerial part fresh weight is weighed, calculate the fresh weight preventive effect of weeds.
Regression analysis is carried out to the logarithm value of drug dose and the niqueMin of corn fresh weight inhibition with DPS softwares, is calculated
Dosage ED when coefficient correlation and suppression crop 10%10, and suppress weeds 90%ED90, obtain selectivity index.
Selectivity index=ED10/ED90
Observe within 5 days after dispenser, with 36.8% topramezone pethoxamid atrazine suspending agent high concentration of embodiment 6
4000mg/kg process part corn lobus cardiacus albefactions, plant height is normal, and low concentration treatment corn growing way does not have normally with blank treatment
There is obvious difference.
The activity of weeding of table 5 and crop safety ocular estimate evaluation criterion
Inhibitory action of the topramezone pethoxamid green bristlegrass suspending agent of table 6 36.8% to corn
Fresh weight preventive effect of the topramezone pethoxamid green bristlegrass suspending agent of table 7 36.8% to weeds
As shown in Table 7：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 8.
Table 8：Virulence regression equation and LD50
| Treatment | Regression equation | Coefficient correlation | 95% confidential interval | |
| A | Y=-0.5556+2.5902x | 0.9980 | 139.6038 | 121.1858~158.2047 |
As shown in Table 8：The LD of 36.8% topramezone pethoxamid green bristlegrass suspending agent50For：139.6038,95% confidence area
Between be 121.1858-158.2047.
By table 6, table 7, can be in the hope of the ED of suppression corn growth 10% by DPS softwares10=3351.03, suppress weeds
The ED of growth 90%90=575.31, selectivity factor=3351.03/575.31=5.82>2, it is believed that 6.8% topramezone
The treatment of pethoxamid green bristlegrass suspending agent cauline leaf process high concentration can cause corn albefaction to corn, other concentration treatment corn growth
Normally, the medicament has obvious selectivity, to crop safety.
Embodiment 12：Complex weedicide field control effectiveness test of the present invention
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, and oil-suspending agent (2% benzene azoles grass is dispersibled using 42% topramezone pethoxamid green bristlegrass of the embodiment of the present invention 5
The atrazine of the pethoxamid of ketone+20%+20%) milliliter/mu of dosage 80,100,120,200, be watered 40 kgs/acre and spray, 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, and with the increase of dosage, preventive effect is remarkably reinforced, in corn
Milliliter/mu of field 100 can reach good herbicidal effect, compare with one of which active ingredient is used alone, and 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 conducive to keeping ecological balance.In addition, herbicide of the invention is processed using physical method, work is produced
Skill is simple, and three-waste free discharge in production process has no adverse effects to ecological environment.It is that current prevention effect preferably compounds weeding
Agent.
The 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 (2)
1. a kind of Weeding composition applied in post-emergence period of corn containing topramezone, it is characterised in that：The active ingredient of the Herbicidal combinations
It is topramezone and pethoxamid, the weight ratio of the topramezone and pethoxamid is 1.2-2：40-15.
2. Herbicidal combinations according to claim 1, it is characterised in that：The formulation of the Herbicidal combinations be suspending agent,
Suspension emulsion, wettable powder or water dispersible granules.
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| CN105409999A (en) * | 2015-12-24 | 2016-03-23 | 安徽美兰农业发展股份有限公司 | Topramezone, nicosulfuron and atrazine compounded dispersible oil-based suspension agent and preparation method thereof |
| CN111202075B (en) * | 2020-03-02 | 2021-12-03 | 广西化工研究院有限公司 | Herbicide composition suitable for corn field and sugarcane field and preparation thereof |
| CN112493248A (en) * | 2020-11-17 | 2021-03-16 | 京博农化科技有限公司 | Weeding composition containing topramezone, clopyralid and bentazone |
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| CN102763658A (en) * | 2012-08-16 | 2012-11-07 | 济南绿邦化工有限公司 | Safety herbicide for corn field |
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