CN102845428A - Mixed herbicide of wheat after seedlings - Google Patents
Mixed herbicide of wheat after seedlings Download PDFInfo
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- CN102845428A CN102845428A CN2012103667944A CN201210366794A CN102845428A CN 102845428 A CN102845428 A CN 102845428A CN 2012103667944 A CN2012103667944 A CN 2012103667944A CN 201210366794 A CN201210366794 A CN 201210366794A CN 102845428 A CN102845428 A CN 102845428A
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- clopyralid
- mesotrione
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- mixed herbicide
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Abstract
The invention relates to the technical field of pesticides and discloses a mixed herbicide of wheat after seedlings. The mixed herbicide comprises two active ingredients which are mesotrione and clopyralid. The weight ratio between mesotrione and clopyralid is (1:3)-(1:5), and preferably, the mass content of mesotrione and clopyralid in the mixed herbicide is 5-85%. The mixed herbicide can prevent and kill annual broad-leaf weeds in wheat fields, particularly resistance broad-leaf weeds such as descurainia sophia, sun euphorbia herb and shepherdspurse herb, can remove part of grassy weeds, is remarkable in weeding effect, has remarkable synergistic effect, has no influence on afterreap crops, and is an ideal herbicide.
Description
Technical field
The present invention relates to technical field of pesticide, be specifically related to a kind of mixed herbicide of wheat after seedling.
Background technology
Wheat is one of staple food crop of northern China, and the long-term cultivated area of China is only second to Monitoring of Paddy Rice Plant Area at more than 3,000 ten thousand hectares.Wheatland crop smothering area accounts for more than 30% of total cultivated area, and wherein serious injured area is more than 8%, and the general underproduction can be had no harvest when serious more than 15%.Therefore, the usage ratio of domestic wheat paddock weed killer herbicide almost reaches 100%, and its dosage is very large.At present, domestic wheat paddock seedling rear defence has except the main medicament of weed killer herbicide of broad leaved weed: tribenuron-methyl, dicamba, metsulfuron-methyl, thifensulfuron methyl, isoproturon etc., but because using for many years, many weeds have produced pesticide resistance, cause its consumption to strengthen, make easily wheat produce recessive poisoning and the underproduction, and also not too safe to succession crop.Broadcast ma wormwood artemisia, corn gromwell, shepherd's purse, the wartwort etc. of Huanghuai Area have produced resistance gradually at present.The chemical control of general weeds of wheat all before the winter control and turn green early spring after jointing the first two critical period carry out.
Mesotrione has another name called mesotrione; that Switzerland is just reaching first the corn new herbicides that crop protection Co., Ltd releases in recent years; commodity by name thousand layers red; prevent and kill off annual broadleaf weed and part grassy weed (the broad-leaved preventive effect is better than grass family); the mechanism of action is for suppressing the activity of PHPPA dioxygenase (HPPD), and HPPD can be converted into plastoquinone with the amino acid TYR.Without any the report that uses at wheat, more registration is not used at present.For this reason, we have carried out wheat safety and efficiency test.
Clopyralid is a kind of artificial synthetic auxin, and its chemical constitution and many natural auxins are similar, but have better persistence in the tissue of plant.It mainly the root by plant and leaf absorb then and in plant corpus, conduct, so its conductive performance is stronger.After the weeds dispenser, it is moved up and down and is transmitted to rapidly whole plant by the blade of plant or root absorption in plant corpus.Thereby the synthetic of DNA, RNA that the clopyralid of low concentration can stimulating plant and protein causes fissional out of control and unordered growth, causes at last restraining destroyed; The clopyralid of high concentration then can suppress division and the growth of cell.
Summary of the invention
The purpose of this invention is to provide and a kind ofly can prevent and kill off broad leaved weed, particularly broadcast the resistance broad leaved weeds such as ma wormwood artemisia, corn gromwell, shepherd's purse, wartwort, can hold concurrently again except the part grassy weed, and respond well mixed herbicide of wheat after seedling.
In order to realize the foregoing invention purpose, the invention provides following technical scheme:
A kind of mixed herbicide of wheat after seedling comprises mesotrione and clopyralid, and the weight ratio of mesotrione and clopyralid is 1:3～1:5.
As preferably, the weight ratio of mesotrione and clopyralid is 1:4 in the complex weedicide of the present invention.
On the other hand, the invention provides that the quality percentage composition of mesotrione and clopyralid is 5～85% of described complex weedicide in the described complex weedicide.
As preferably, in the complex weedicide of the present invention, after two kinds of active components of mesotrione and clopyralid are composite according to above-mentioned weight ratio, the formulations of pesticide such as oil-suspending agent, suspending agent.
Synergy after being mixed with the co-toxicity coefficient method evaluation of Sun Yunpei, the result shows that mesotrione, clopyralid are by 1:3～1:5.The composite co-toxicity coefficient of ratio reaches remarkable synergistic effect obviously greater than 120, illustrates that mesotrione, clopyralid are mixed annual dicotyledonous weeds is had significant synergies in 1:3～1:5 ratio.
Security test test to wheat shows that the composite cauline leaf of mesotrione clopyralid is processed, and suppresses the ED of wheat growth 10%
10=1408.89, the ED of inhibition weed growth 90%
90=232.13, selectivity factor is 1408.89/232.13=6.07〉2, think that this medicament has obvious selectivity, the mesotrione clopyralid has good safety to wheat.
Complex weedicide of the present invention shows by the field control effectiveness test in 2 years, arrives period of seedling establishment in the 3 leaf phases of wheat, and weeds 1-7 leaf does not wait the phase, and wheat has no symptom of chemical damage from the dispenser to the maturing stage, to wheat safety.The preventive effect of weeds reached more than 75% in 20 days, reached more than 90% in 60 days, and along with the increase of dosage, preventive effect obviously strengthens, and not only herbicidal effect is remarkable, and environmentally friendly, on second stubble crop without impact.
Compared with prior art, complex weedicide of the present invention can be prevented and kill off broad leaved weed, and particularly the resistance broad leaved weed can be held concurrently again except the part grassy weed, to wheat safety, and on succession crop without impact, have a good application prospect.
Embodiment
The invention discloses a kind of mixed herbicide of wheat after seedling that comprises mesotrione and two kinds of active components of clopyralid, 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 deemed to be included in the present invention.Product of the present invention and application 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.
Below in conjunction with embodiment, further set forth the present invention:
Embodiment 1:Suspending agent (the mesotrione: clopyralid=1:3) for preparing complex weedicide of the present invention
24% mesotrione clopyralid suspending agent, 24% refers to that mesotrione and two kinds of active components of clopyralid account for the percentage of gross weight.Get the 6kg mesotrione, the 18kg clopyralid,
Phenethyl phenol polyethenoxy ether polyoxy phenyl ether 3%, aluminium-magnesium silicate 1%, propane diols 3%, xanthans 0.2%, Kathon CG 0.1%, water complements to 100%.
Embodiment 2:Oil-suspending agent (the mesotrione: clopyralid=1:4) for preparing complex weedicide of the present invention
20% mesotrione clopyralid oil-suspending agent, 20% refers to that mesotrione and two kinds of active components of clopyralid account for the percentage of gross weight.Get the 4kg mesotrione, the 16kg clopyralid, Pluronic125 8%, propane diols 5%, xanthans 0.8%, 1% methylated vegetable oil, water complements to 100%.
Embodiment 3:Mesotrione and clopyralid cauline leaf are processed the synergy toxicity and are measured
1, test objective
Under greenhouse experiment, adopt pot-culture method, the herbicidal effect of research mesotrione, clopyralid binary built, and the synergy type after estimating the two different proportion and use with the co-toxicity coefficient method of Sun Yunpei, for the rational mixture of mesotrione and clopyralid provides scientific basis.
2, experimental condition
2.1 for studying the thing wheat breed: Anhui wheat 33
2.2 for the examination weeds broadcast the ma wormwood artemisia (
Descurainia sophia (L.)Schur), wartwort (
Euphorbia helioscopiaL.), wild oat (
Avena fatuaL.) upper one year the field seed of gathering, germination rate is more than 85%).
2.3 the cultivation of experimental condition and examination material
In the illumination cultivation chamber, carry out the cultivation of test material, temperature 15-20 ℃.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, every kind of weed seed 30-40 grain is evenly put into basin, earthing 0.5cm should replenish the required moisture of growth between the weeds culture period.
2.4 other condition
With the regular moisturizing of mode (not watering in 2 days behind the medicine) of bottom infiltration, keep soil moisture.
3 experimental scheme
3.1 medicament
3.1.1 reagent agent
The former medicine of 95% mesotrione (Dandong city agricultural chemicals head factory);
The former medicine of 95% clopyralid (Lier Chemical Co., Ltd).
3.1.2 reagent agent liquid preparation
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 former medicine is diluted to desired concn at last.
3.1.3 experimental scheme
3.1.3.1 the synergy of mesotrione and clopyralid
Mesotrione, clopyralid single dose and 5 mesotriones and clopyralid mixture preparation are established respectively 5 dosage, and described ratio is the active component weight ratio of mesotrione and clopyralid.Other establishes blank, and each test is processed and repeated 4 times.Treatment agent dosage sees table 1 for details.
Table 1 test is processed and test level (concentration ga.i./mu)
3.2 application method
3.2.1 application method
Process in 3 leaf phases of wheat, the spraying of weeds 2-4 leaf phase cauline leaf.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.
3.2.2 spraying time and number of times
Tested in the wheat 3-5 leaf phase and carry out reagent spray processing, dispenser 1 time.
4 investigation methods
The symptom of being injured of detail record wheat and weeds after the dispenser, 20d behind the medicine carries out fresh weight and measures, and compares with control treatment, calculates the fresh weight preventive effect.
4.1 synergy assay method
Synergy type after result of the test is used with the co-toxicity coefficient method evaluation of Sun Yunpei.
According to SUN, Y-P(Sun Yun is abundant) method calculates the theoretical toxicity index of its actual toxicity index, 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 clopyralid as the standard medicament.
Criterion: co-toxicity coefficient＜80 are antagonism, are summation action between 80-120,〉120 for synergistic effect.
5 results and analysis
5.1 the synergy of mesotrione and clopyralid
5.1.1 mesotrione and clopyralid are mixed to the fresh weight preventive effect of weeds, the results are shown in Table 2.
Table 2 mesotrione and clopyralid are mixed behind the medicine 20d to the fresh weight preventive effect of weeds
Control efficiency is the mean value of four data in the table.
5.1.2 mesotrione and clopyralid are mixed to the synergy of weeds
As shown in Table 2: medicament is to toxic action situation and the preventive effect of weeds.Calculate its virulence regression equation, LD separately by formula
50, actual toxicity index, theoretical toxicity index and co-toxicity coefficient.List in table 3.
Table 3: mesotrione and clopyralid are mixed to the synergy of weeds
By test as can be known, the co-toxicity coefficient of processing C, D, E, F, G is respectively: 98.09,131.57,206.80,141.42,87.27, and wherein, the co-toxicity coefficient of D, E, F reaches remarkable synergistic effect obviously greater than 120, and the co-toxicity coefficient of wherein processing E is maximum.
5.1.3 conclusion (of pressure testing)
By test as can be known, mesotrione, clopyralid have significant synergies to annual dicotyledonous weeds in the synergistic effect that has been mixed of 3:1～5:1 ratio.
6 overall merits
Shown that by above synergy measurement result the two is better with the composite effect of the ratio of 3:1～5:1 for mesotrione and clopyralid, wherein with the composite best results of 4:1 left and right sides ratio.
Embodiment 5:The composite cauline leaf of mesotrione clopyralid is processed the Security test test to wheat
1, test objective:
Under greenhouse experiment, adopt pot-culture method, research mesotrione, clopyralid binary built cauline leaf are processed the safety to wheat, for the rational mixture of mesotrione and clopyralid provides scientific basis.
2, experimental condition
2.1 for studying the thing wheat breed: Anhui wheat 33.
2.2 for the examination weeds broadcast the ma wormwood artemisia (
Descurainia sophia (L.)Schur), wartwort (
Euphorbia helioscopiaL.), shepherd's purse (
Capsellabursa-pastoris(L.) Medic.), wild oat (
Avena fatuaL.) upper one year the field seed of gathering, germination rate is more than 85%).(upper one year the field seed of gathering, germination rate is more than 85%).
2.3 the cultivation of experimental condition and examination material
In the illumination cultivation chamber, carry out the cultivation of test material, temperature 15-20 ℃.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, every kind weed seed 30-40 of wheat seed grain is evenly put into basin earthing 0.5cm, put into the greenhouse and cultivate (15-20 ℃), should replenish the required moisture of growth between wheat seedling and weeds culture period.Stay the seedling of 10 strain stalwartnesses after all sprouting, treat that wheat seedling length to 3～4 leaves and weeds are long to process to dispenser in 3～5 o'clock.
2.4 other condition
With the regular moisturizing of mode (not watering in 2 days behind the medicine) of bottom infiltration, keep soil moisture.
3 experimental scheme
3.1 medicament
3.1.1 reagent agent
The former medicine of 95% mesotrione (Dandong city agricultural chemicals head factory);
The former medicine of 95% clopyralid (Lier Chemical Co., Ltd).
3.1.2 reagent agent liquid preparation
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 former medicine is diluted to desired concn at last.
3.2 application method
3.2.1 application method
Process in 3 leaf phases of wheat, the spraying of weeds 2-4 leaf phase cauline leaf.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.
3.2.2 spraying time and number of times
Tested in the 3 leaf phases of wheat and carry out reagent spray processing, dispenser 1 time.
4 investigation and computational methods
4.1 crop investigation
After the dispenser, investigation is respectively processed wheat and is had or not symptom of chemical damage, if then detail record symptom of chemical damage, grade are arranged, and behind the medicine 20 days, measure and respectively process the wheat fresh weight, calculate the fresh weight inhibiting rate, with the safety of clear and definite test medicine to wheat.
4.2 weeds investigation
The symptom of being injured of detail record weeds (such as growth inhibition, chlorosis, deformity etc.) after the dispenser, behind medicine 20 days, weeds acrial part fresh weight was respectively processed in weighing, calculated the fresh weight preventive effect of weeds.
4.3 computational methods
With DPS software the logarithm value of drug dose and the probability value of wheat fresh weight inhibiting rate are carried out regression analysis, the dosage ED when calculating correlation coefficient and suppressing crop 10%
10, and suppress weeds 90%ED
90, obtain selectivity index.
Selectivity index=ED
10/ ED
90
5 results and analysis
5.1 mesotrione clopyralid cauline leaf is processed the safety to wheat
The safety evaluatio standard sees Table 4, observes in 3 days after the dispenser, and mesotrione dichloropyridine acid high concentration 2400mg/kg processes indivedual wheat leaf blade albefaction lobus cardiacus distortions, and growth is suppressed, and low concentration is processed the wheat growth normal; After the dispenser 7-12 days, it is normal that low concentration is processed the wheat growing way, and 2400mg/kg processes wheat and also slowly recovers.20 days 50% mesotrione clopyralid WP see Table 5 to the inhibitory action of wheat after the dispenser.
Table 4 activity of weeding and crop safety ocular estimate evaluation criterion
| Phytotoxicity (%) | The comprehensive comment of activity of weeding is (to influence degrees such as plant inhibition, deformity, albefaction, death | The comprehensive comment of crop safety is (to influence degrees such as plant inhibition, deformity, albefaction, death |
| 0 | With contrast, non-activity | With contrast, without impact, safety |
| 10 | Slightly influential, activity is very low | Slightly influential, poisoning is very light |
| 20－40 | Influential, active low | Influential, poisoning is obvious |
| 50－70 | Obviously impact growth has activity | Obviously impact growth, poisoning is serious |
| 80 | Have a strong impact on growth, Mortality | Have a strong impact on growth, poisoning is more serious |
| 90 | Have a strong impact on growth, most of dead, remaining plant is few, and is active fine | Have a strong impact on growth, most of dead, poisoning is very serious |
| 95 | Have a strong impact on growth, plant is substantially dead, and remaining plant seldom, and is active fine | Plant is substantially dead, and poisoning is very serious |
| 100 | All dead | All dead |
Table 5 24% mesotrione clopyralid SC is to the inhibitory action of wheat
| Process | Mass concentration (mg/kg) | ? | 20d inhibiting rate (%) |
| ? | 150 | ? | 0.27 |
| ? | 300 | ? | 0.78 |
| 24% mesotrione clopyralid SC | 600 | ? | 2.06 |
| ? | 1200 | ? | 8.52 |
| ? | 2400 | ? | 20.15 |
| Contrast | Clear water | ? | / |
Table 6 24% mesotrione clopyralid SC is to the fresh weight preventive effect of weeds
This medicament calculates its virulence regression equation, LD respectively to toxic action situation and the preventive effect of weeds by formula as shown in Table 6
50, list in table 7.
Table 7: virulence regression equation and LD
50
| Process | Regression equation | Correlation coefficient | LD 50 | 95% confidence interval |
| A | Y=0.6884+2.3706x | 0.9930 | 65.89 | 57.3888－ 75.6503 |
As shown in Table 7: the LD of 24% mesotrione clopyralid SC
50For: 65.89,95% confidence intervals are 57.3888-75.6503.
5.2 mesotrione clopyralid cauline leaf is processed the selectivity index to wheat and weeds
By table 5, table 6, try to achieve the ED that suppresses wheat growth 10% by DPS software
10=1408.89, the ED of inhibition weed growth 90%
90=232.13, selectivity factor is 1408.89/232.13=6.07〉2, think that this medicament has obvious selectivity, can carry out field control effectiveness test.
6 overall merits
6.1 this result of the test shows that mesotrione clopyralid cauline leaf is processed the high concentration processing can cause the wheat albefaction to wheat, it is normal that other concentration is processed wheat growth.
6.2 the mesotrione clopyralid has good control efficiency to weeds by Toxicity Determination as can be known.
Embodiment 6:Complex weedicide field control effectiveness test of the present invention
Complex weedicide of the present invention shows by the field control effectiveness test in 2 years, wheat period of seedling establishment before the winter, weeds 1-7 leaf does not wait the phase, utilize 80,100,120,200 milliliters/mu of 20% mesotrione clopyralid of the present invention (4% mesotrione+16% clopyralid) oil-suspending agent (OF) dosage, being watered 40 kg/acres sprays, 20, the range estimation wheat safety of 60 days and maturing stage and weeds preventive effect, surveyed all preventive effects, result such as following table in 20,60 days:
By range estimation, wheat has no symptom of chemical damage from the dispenser to the maturing stage, to wheat safety.100 milliliters/mu of the preventive effects of broad leaved weed were reached more than 85% in 20 days, reached more than 93% in 60 days, increase along with dosage, preventive effect obviously strengthens, can good herbicidal effect be arranged to broad leaved weed 30 milliliters/mu of wheat paddocks, with wherein a kind of active ingredient comparison of independent use, enlarged the herbicide spectrum, broad leaved weed is had obvious synergistic effect.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.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.It is the desirable complex weedicide of present control efficiency.
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 (5)
1. a mixed herbicide of wheat after seedling is characterized in that, comprises mesotrione and clopyralid, and the weight ratio of mesotrione and clopyralid is 1:3～1:5.
2. complex weedicide according to claim 1, as preferably, the weight ratio of mesotrione and clopyralid is 1:4.
3. according to claim 1,2 described complex weedicides, it is characterized in that the quality percentage composition of mesotrione and clopyralid is 5～85% of described complex weedicide.
4. according to claim 1,2,3 described complex weedicides, it is characterized in that mesotrione and clopyralid are with the existing mixed existing usefulness of the mixed form of bucket, all being considered as is to be included in the present invention.
5. each described complex weedicide is characterized in that according to claim 1-4, and described complex weedicide is the formulations of pesticide such as oil-suspending agent, suspending agent.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103027042A (en) * | 2012-12-14 | 2013-04-10 | 青岛东生药业有限公司 | Complex composition containing mesotrione and clopyralid |
| CN103027038A (en) * | 2012-12-14 | 2013-04-10 | 青岛东生药业有限公司 | Suspension concentrate containing mesotrione and clopyralid and production method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102326549A (en) * | 2011-06-17 | 2012-01-25 | 陕西韦尔奇作物保护有限公司 | Herbicidal composition containing mesotrione |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102326549A (en) * | 2011-06-17 | 2012-01-25 | 陕西韦尔奇作物保护有限公司 | Herbicidal composition containing mesotrione |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103027042A (en) * | 2012-12-14 | 2013-04-10 | 青岛东生药业有限公司 | Complex composition containing mesotrione and clopyralid |
| CN103027038A (en) * | 2012-12-14 | 2013-04-10 | 青岛东生药业有限公司 | Suspension concentrate containing mesotrione and clopyralid and production method thereof |
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Application publication date: 20130102 |