CN107347901B - Compound herbicide used after wheat field seedling emergence - Google Patents
Compound herbicide used after wheat field seedling emergence Download PDFInfo
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- CN107347901B CN107347901B CN201710609125.8A CN201710609125A CN107347901B CN 107347901 B CN107347901 B CN 107347901B CN 201710609125 A CN201710609125 A CN 201710609125A CN 107347901 B CN107347901 B CN 107347901B
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- saflufenacil
- tralkoxydim
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- mesosulfuron
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N47/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom not being member of a ring and having no bond to a carbon or hydrogen atom, e.g. derivatives of carbonic acid
- A01N47/08—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom not being member of a ring and having no bond to a carbon or hydrogen atom, e.g. derivatives of carbonic acid the carbon atom having one or more single bonds to nitrogen atoms
- A01N47/28—Ureas or thioureas containing the groups >N—CO—N< or >N—CS—N<
- A01N47/36—Ureas or thioureas containing the groups >N—CO—N< or >N—CS—N< containing the group >N—CO—N< directly attached to at least one heterocyclic ring; Thio analogues thereof
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N35/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom having two bonds to hetero atoms with at the most one bond to halogen, e.g. aldehyde radical
- A01N35/08—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom having two bonds to hetero atoms with at the most one bond to halogen, e.g. aldehyde radical at least one of the bonds to hetero atoms is to nitrogen
- A01N35/10—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom having two bonds to hetero atoms with at the most one bond to halogen, e.g. aldehyde radical at least one of the bonds to hetero atoms is to nitrogen containing a carbon-to-nitrogen double bond
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N43/00—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds
- A01N43/48—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with two nitrogen atoms as the only ring hetero atoms
- A01N43/54—1,3-Diazines; Hydrogenated 1,3-diazines
Abstract
The invention discloses a post-emergence compound herbicide for wheat, which comprises the effective components of mesosulfuron, tralkoxydim and saflufenacil, wherein the mass ratio of the mesosulfuron, the tralkoxydim and the saflufenacil is 1-30: 10-40: 10-50. Compared with single herbicide of mesosulfuron-methyl, tralkoxydim and saflufenacil, the herbicide has the advantages of obvious effect, low dosage, low cost, enlarged weed control spectrum, obvious improvement on the control effect of single and dicotyledonous weeds in the field, fresh weight control effect and comprehensive fresh weight control effect, safety to field crops and obvious quick action. The herbicide can prevent and kill weeds in the whole growth period of crops by one-time application, is environment-friendly, has no residue, and is highly safe for next-stubble crops. Is an ideal herbicide for stem and leaf treatment of resistant weeds such as jiejie, brome, resistant broadleaf weeds, cleavers, speedwell and the like in wheat fields at present.
Description
Technical Field
The invention relates to the field of pesticides, and particularly relates to a post-emergence compound herbicide for a wheat field.
Background
The chemical name of Mesosulfuron-methyl is: methyl-2 [3- (4, 6-methoxypyrimidin-2-yl) -ureidosulfonyl ] -4-methanesulfonyl aminobenzoate of formula: C17H21N5O9S2, molecular weight: 503.51. the mesosulfuron-methyl is a sulfonylurea herbicide, is mainly absorbed by stems and leaves of plants, is conducted through phloem and xylem, and is absorbed by soil in a small amount to inhibit the activity of acetolactate synthase in sensitive plants, so that the synthesis of branched-chain amino-complex acid is hindered, the cell division is inhibited, and the sensitive plants die. Can be used for preventing and killing off alopecurus, wild oat, pseudostellaria, bluegrass, stiff grass, common Cymbopogon root, lolium multiflorum, poison wheat, bromus, candlelia, burclover, crowndaisy, agropyron cristatum, shepherd's purse, descurainia sophia, starwort, rape and the like in wheat fields.
The chemical name of the tralkoxydim is 2- [1- (ethoxyimino) propyl ] -3-hydroxy-5- (2,4, 6-trimethylphenyl) cyclohex-2-enone, the molecular formula is C20H27NO3, the molecular weight is 329.43, and the tralkoxydim is a high-selectivity herbicide. Has the effect of internal absorption and conduction, and is used for preventing and killing various gramineous weeds in barley and wheat fields. After the foliage application, the weeds are quickly absorbed and transferred to the whole plant body, and the weeds lose green and die. Preventing and killing wild oat, arthroncus, alopecurus, beckmannia syzigachne, bromus, etc., and is effective from early growth stage to leaf separating stage and joint removing stage.
Saflufenacil belongs to the pyrimidine class, is a protoporphyrinogen oxidase (PPO) inhibitor, and has the chemical name: n' - [ 2-chloro-4-fluoro-5- (3-methyl-2, 6-dioxo-4- (trifluoromethyl) -3, 6-dihydro-1 (2H) -pyrimidine) benzoyl ] -N-isopropyl-N-methylsulfamide with the molecular formula C17H17ClF4N4O 5S. The saflufenacil can be used as a biocidal herbicide and can effectively prevent and kill various broadleaf weeds including weeds resistant to glyphosate, ALS and triazines; has quick killing effect and rapid degradation of soil residue. Can be mixed with gramineous weed herbicide, has good effect, can be applied to various crop fields and non-cultivated lands, and has small rotation limitation. At present, a single agent is used in a wheat field, and the effect of preventing and removing dicotyledonous weeds in the wheat field is obvious. The object to be prevented and removed is annual monocotyledonous and dicotyledonous weeds, such as alopecurus, wild oat, club grass, bluegrass, stiff grass, common fenugreek rhizome, lolium multiflorum, poison wheat, brome, candle grass, burclover, crowndaisy grass, wheatgrass, shepherdspurse herb, descurainia sophera, caraway grass, spontaneous rape, cleavers, shepherd's purse, speedwell, husbandry, quinoa, goosefoots, and the like.
The three pesticides have limited weeding effect, and can not be applied to all weeds in a wheat field at one time, so that the application amount and the application cost are increased.
Disclosure of Invention
In order to solve the problems, the invention provides a compound herbicide for wheat fields, which can solve the problems of resistance arthroncus, brome, lolium multiflorum, cleavers, veronica and the like.
The technical scheme of the invention is as follows:
the post-emergence compound herbicide for wheat comprises the effective components of mesosulfuron, tralkoxydim and saflufenacil, wherein the mass ratio of the mesosulfuron, the tralkoxydim and the saflufenacil is 1-30: 10-40: 10-50.
In a further scheme, the mass ratio of the mesosulfuron to the tralkoxydim to the saflufenacil is 10-15: 10-20: 10-35.
In a further scheme, the mass ratio of the mesosulfuron to the tralkoxydim to the saflufenacil is 10: 15:25.
In a further scheme, the sum of the mass of the mesosulfuron, the tralkoxydim and the saflufenacil accounts for 1-80% of the total mass of the compound herbicide.
In a further scheme, the formulation of the compound herbicide comprises wettable powder, water dispersible granules, an emulsion in water, a suspending agent, a suspoemulsion, an aqueous agent or missible oil.
A compound herbicide suspending agent after wheat seedling emergence comprises the following components in percentage by mass: 10-25% of mesotrione original drug, 10-40% of tralkoxydim, 10-50% of saflufenacil, 8kg of polyoxyalkylene, 9 kg/castor oil polyoxyethylene ether, 2kg of dodecyl benzene sulfonate and the balance of methyl esterified vegetable oil to 100 kg. The dispersible oil suspending agent is obtained by fully mixing, blending, ball milling, crushing, adjusting and packaging all the components.
Compared with single herbicide of mesosulfuron-methyl, tralkoxydim and saflufenacil, the herbicide has the advantages of obvious effect, low dosage, low cost, enlarged weed control spectrum, obvious improvement on the control effect of single and dicotyledonous weeds in the field, fresh weight control effect and comprehensive fresh weight control effect, safety to field crops and obvious quick-acting property. The herbicide can prevent and kill weeds in the whole growth period of crops by one-time application, is environment-friendly, has no residue, and is highly safe for next-stubble crops. Is an ideal herbicide for stem and leaf treatment of resistant weeds such as jiejie, brome, resistant broadleaf weeds, cleavers, speedwell and the like in wheat fields at present.
Compared with a single agent, the compound herbicide for wheat after seedling provided by the invention has improved control effect on field weeds, fresh weight control effect and comprehensive fresh weight control effect, and is safe for field crops.
Compared with a mesosulfuron-methyl-tralkoxydim-bensulfuron suspending agent, a tralkoxydim water dispersible granule and a bensulfuron-methyl-bensulam water dispersible granule, the mesosulfuron-methyl-tralkoxydim-bensulam suspending agent provided by the invention has the advantages that the dosage is reduced, the residue is reduced, the control effect on monocotyledonous and dicotyledonous weeds in a wheat field, the fresh weight control effect and the comprehensive fresh weight control effect are improved, the mesosulfuron-methyl-tralkoxydim-bensulam suspending agent is safe to field crops, and the effect on resistant weeds in the wheat field is obvious.
Detailed Description
The invention discloses a post-seedling herbicide for wheat fields, which can be realized by appropriately improving process parameters by the technical personnel in the field by referring to the content in the text. It is expressly intended that all such similar substitutes and modifications which would be obvious to one skilled in the art are deemed to be included in the invention. While the methods and applications of this invention have been described in terms of preferred embodiments, it will be apparent to those of ordinary skill in the art that variations and modifications in the methods and applications described herein, as well as other suitable variations and combinations, may be made to implement and use the techniques of this invention without departing from the spirit and scope of the invention.
The invention is further illustrated by the following examples:
example 1 dispersible oil suspension concentrate of the Compound herbicide of the present invention
30 percent of the dispersible oil suspending agent of mesosulfuron-methyl, tralkoxydim and saflufenacil, and 30 percent of the dispersible oil suspending agent is the percentage of three active components of the mesosulfuron-methyl, the tralkoxydim and the saflufenacil in the total weight. 10kg of mesosulfuron, 10kg of tralkoxydim, 10kg of saflufenacil, 8kg of polyoxyalkylene, 9kg of castor oil polyoxyethylene ether, 2kg of dodecyl benzene sulfonate and methyl esterified vegetable oil are taken, and the balance is 100 kg. The dispersible oil suspending agent is obtained by fully mixing, blending, ball milling, crushing, adjusting and packaging.
Example 2 Water dispersible granule for preparing the Compound herbicide of the invention
The 40% water dispersible granule of the metsulfuron methyl, the tralkoxydim and the saflufenacil is prepared by weighing three active components of the metsulfuron methyl, the tralkoxydim and the saflufenacil in percentage by weight. Taking 10kg of mesosulfuron, 10kg of tralkoxydim, 20kg of saflufenacil, D-4256 kg, EFW2kg, 5kg of ammonium sulfate, 1kg of polyethylene glycol and kaolin to make up to 100 percent, and fully mixing, airflow crushing, mixing, granulating, drying and screening to obtain the dispersible granule.
Example 3: wettable powder for preparing compound herbicide
50 percent of wettable powder of methyldisulfuron-tralkoxydim and saflufenacil, and three active components of the methyldisulfuron, the tralkoxydim and the saflufenacil are weighed to account for the total weight percentage. 10kg of mesosulfuron, 15kg of tralkoxydim, 25kg of saflufenacil, 4kg of dispersant NNO, 3kg of wetting agent K12, 4kg of white carbon black and the balance of light calcium carbonate to 100kg are taken. The wettable powder is obtained by fully mixing, airflow crushing and mixing.
Example 4: suspending agent for preparing compound herbicide
60 percent of suspending agent of mesotrione, tralkoxydim and saflufenacil, and three active components of the mesotrione, the tralkoxydim and the saflufenacil are weighed according to the percentage of the total weight. 15kg of mesosulfuron, 15kg of tralkoxydim, 30kg of saflufenacil, 1601# 15% of emulsifier, 5% of wetting agent LS, 0.1% of dispersant SOPA-2704% of bentonite, 3% of xanthan gum, 0.4% of organic silicon defoamer, 5% of glycerol and deionized water are added to make up to 100%.
Example 5: emulsifiable solution for preparing compound herbicide
70 percent of emulsifiable concentrate of mesotrione, tralkoxydim and saflufenacil, and three active components of the mesotrione, the tralkoxydim and the saflufenacil are weighed according to the percentage of the total weight. 15kg of mesosulfuron, 20kg of tralkoxydim, 35kg of saflufenacil, No. 4% of concentrated milk, 6% of dodecyl benzene sulfonate and the balance of xylene to 100 percent are taken.
Example 6 indoor virulence assay
The purpose of the test is as follows: under the greenhouse condition, a pot experiment method is adopted to research the weeding effect of the ternary combination of the mesosulfuron-methyl, the tralkoxydim and the saflufenacil, and a co-toxicity coefficient method of the sunlpir is adopted to evaluate the type of the linkage effect of the mesosulfuron-methyl, the tralkoxydim and the saflufenacil in different proportions, so that an experiment basis is provided for the experiment.
The test conditions are as follows: the weed to be tested is alopecurus, wild oat, pseudostellaria, bluegrass, stiff grass, common vetch, ryegrass, poison wheat, brome, candle grass, nodal wheat, crowndaisy, agropyron cristatum, shepherd's purse, descurainia, caraway, spontaneous rape, cleavers, shepherdspurse herb, speedwell, husbandry, goosefoot herb and the like, (seeds are harvested in the field in the last year, and the germination rate is more than 85%).
Is carried out in a light culture room at 10-25 deg.C
The application method comprises the following steps: and (4) treating stems and leaves of weeds in a seedling stage.
Design of experiments
95% of mesosulfuron (Jiangsu province agricultural hormone engineering technology research center, Inc.) as a test reagent; 95% of tralkoxydim technical drug (Jiangsu province agricultural hormone engineering technology research center, Inc.) and 97% of saflufenacil technical drug (provided by drug ministry of agriculture and chemical, Inc. of Anhui Fengle).
Weighing a certain amount of the raw medicine by a balance, and diluting the required concentration.
Design of experiments
Combined action of tralkoxydim and saflufenacil
5 doses of the single dose of the tralkoxydim, the single dose of the saflufenacil and 5 mixed doses of the tralkoxydim and the saflufenacil are respectively set, blank controls are additionally set, and each test treatment is repeated for 4 times.
The treatment doses are detailed in Table 1
Table 1 test treatment and test levels (amount of active ingredient)
Combined action of optimum mixing of tralkoxydim and saflufenacil and mesosulfuron-methyl
5 doses of the tralkoxydim-saflufenacil mixed agent, the mesosulfuron-methyl mixed agent and the 5 mixed preparations are respectively set, blank controls are additionally set, and each test treatment is repeated for 4 times. The treatment doses are detailed in table 2.
Table 2: test treatment and test level (amount of active ingredient)
Method of administering a drug
The method is used for treating stems and leaves after seedling in the wheat field, adopts an electric sprayer and a fan-shaped spray head to simulate field spraying, and the spraying amount is 40 kilograms per mu.
Time and frequency of application: the test was carried out by spraying the formulation 1 time on 9, 15 days in 2015.
After the drug is applied, the poisoning condition is recorded in detail, and the fresh weight is measured 20 days after the drug is applied and compared with the control treatment to calculate the fresh weight control effect.
Combined action assay method
Test results the combined action type after the mixture is evaluated by the co-toxicity coefficient method of the Sun Yunpei.
And calculating the actual virulence index, the mixed agent theoretical virulence index and the cotoxicity coefficient according to the SUN, Y-P (Sun cloud Peel) method. And solving a regression equation by taking the concentration logarithm as X and the weed control probability value as Y.
Actual toxicity index (standard medicament LD)50LD of mixture50×100
Theoretical virulence index ═ Σ (virulence index of a test agent x the percentage of active ingredient in the mixture) of the agent
The co-toxicity coefficient is the actual toxicity index/theoretical toxicity index of the mixed preparation multiplied by 100
In the test, saflufenacil is a standard medicament.
And (3) judging standard: the co-toxicity coefficient is less than 80, the antagonism is obtained, the additive effect is obtained between 80 and 120, and the synergism is obtained when the co-toxicity coefficient is more than 120.
Table 3: investigation of fresh weight control effect of single dose
Fresh weights are the mean of quadruplicate replicates in the table.
The indoor toxicity and combined action of the two agents on the monocotyledonous and dicotyledonous weeds are shown in the following table 4
Table 4: indoor virulence and combined effects
It can be seen from the above table that the co-toxicity coefficients of the treatments (C), (D), (E), (F) and (G) are 144.29, 194.35, 203.12, 158.00 and 159.78, respectively, which are all greater than 120, and have a synergistic effect, wherein the co-toxicity coefficient of (E) is the largest and is 200.28, which achieves a significant synergistic effect.
The test conclusion shows that the compounding ratio of the tralkoxydim and the saflufenacil is proper according to the ratio of 15:25, and the weeding composition has obvious synergistic effect on annual weeds.
Combined action of optimum mixture of tralkoxydim and saflufenacil and mesosulfuron
Fresh weight control of weeds with tralkoxydim, saflufenacil and mesosulfuron mixture table 5
Fresh weights are the mean of quadruplicate replicates in the table.
The indoor toxicity and combined action of the three agents on the monocotyledonous and dicotyledonous weeds are shown in the following table 6
| Treatment of | Regression equation | Correlation coefficient | LD50 | Actual virulence index | Theoretical virulence index | Coefficient of efficiency |
| (A) | Y＝1.0978X+3.1527 | 0.9944 | 48.1663 | 7.50 | / | / |
| (B) | Y＝1.4496X+4.1912 | 0.9964 | 3.6137 | 100 | / | / |
| (C) | Y＝2.0901X+2.8895 | 0.9902 | 10.2270 | 35.33 | 25.11 | 140.7 |
| (D) | Y＝2.0765X+2.9239 | 0.9956 | 9.9957 | 36.15 | 19.17 | 188.58 |
| (E) | Y＝2.7541X+2.3864 | 0.9952 | 8.8913 | 40.64 | 14.90 | 272.75 |
| (F) | Y＝1.5895X+2.9227 | 0.9770 | 20.2691 | 17.83 | 10.9 | 163.58 |
| (G) | Y＝1.5623X+2.8227 | 0.9739 | 24.7548 | 14.60 | 9.06 | 161.15 |
It can be seen from the above table that the co-toxicity coefficients of the treatments (C), (D), (E), (F) and (G) are 140.7, 188.58, 272.75, 163.58 and 161.15, respectively, which are all greater than 120, and have a synergistic effect, wherein the co-toxicity coefficient of (E) is the largest and is 272.75, and a significant synergistic effect is achieved.
Tests show that the mixture ratio of the mesotrione to the saflufenacil is proper according to 10:40, the cotoxicity coefficient is maximum, and the composition has obvious synergistic effect on annual monocotyledonous and dicotyledonous weeds.
Example 7 field efficacy test
The application site is as follows: WO 37118of Henan province, WO Zhendao of Mongolian Temple of City, and semen Maydis as the previous crop. The fertility of the test soil is uniform and consistent, and the terrain is flat. The soil is clay, the fertility is moderate, and the humidity is moderate. Pumai No. 10 is sown, the annual monocotyledonous weeds in wheat fields mainly comprise wild oat, arthroncus, brome, alopecurus, and the like, and the dicotyledonous weeds mainly comprise speedwell, cleavers, carex, flea and shepherd's purse, and the like, and are uniformly distributed.
The application time is as follows: the medicine is applied in 3-4 leaf stage of wheat, specifically in 2015, 11 months and 10 afternoons.
The application conditions are as follows: the temperature is 13-22 ℃ on sunny days on the day of drug application.
The dosage and the mode of administration are as follows: the application amount is 100ml/667m2The liquid medicine is prepared by a two-step dilution method. The medical instrument adopts an industrial and agricultural-16 knapsack sprayer, a fan-shaped spray head is arranged, the manual uniform spraying is carried out, the water consumption is 40kg/667m2。
Test groups: the method comprises the following steps of (1) dividing the test group into an oil suspending agent test group, a water dispersible granule test group and a water dispersible granule test group; wherein the oil suspending agent in the test group is 100ml/667m2The dispersible oil suspending agent of 30% mesotrione-tralkoxydim-saflufenacil of example 1 of the invention is sprayed, and the dispersible oil suspending agent test group has 30% mesotrione OD30 ml/mu, and the test groups have 40% mesotrione WG80 g/mu and 70% saflufenacil WG5 g/mu. Blank control group: spraying clear water according to the same dosage.
The test method comprises the following steps: each test group and blank control group are repeated for 4 times, and each test group and blank control group respectively occupy 60m of test field cell area2And the cells are randomly arranged. Before drug application, randomly selecting 4 points before drug application in the cells of each test group and blank control group; applying the herbicide for 30d and 45d to investigate the withered and dead number of weeds, calculating the plant control effect and fresh weight control effect by 45d, and respectively recording the number of weeds (plants/m) in each test group and blank control group in each plot2) Calculating the weed control effect (%); after 45 days of pesticide application, the weeds are pulled out and the fresh weight (g/m) is weighed2) And calculating the fresh weight control effect (%).
The herbicidal effects of the individual test groups are shown in the table
TABLE 7 herbicidal effect of various formulations of methyldisulfuron, tralkoxydim and saflufenacil
As can be seen from the above table, after 30 days of application, the dispersible oil suspension containing 30% of mesosulfuron-methyl, tralkoxydim and saflufenacil prepared in example 1 of the invention has a control effect on monocotyledonous weeds and dicotyledonous weeds of more than 95%, the control effects on monocotyledonous weeds and dicotyledonous weeds of 30% of mesosulfuron-methyl are respectively 76.1% and 50%, the control effect on monophyletic weeds of 40% of tralkoxydim is 75.6%, the control effect on monocotyledonous weeds of 70% of saflufenacil water dispersible granules is ineffective, and the control effect on dicotyledonous weeds is 51.3%. Compared with each single agent, the herbicide composition not only improves the control effect on weeds, but also expands the weed control spectrum, and has very obvious difference (P is less than 0.01).
After 45 days of application, the dispersible oil suspension containing 30% of mesosulfuron-methyl, tralkoxydim and saflufenacil prepared in example 1 of the invention has a control effect on monocotyledonous and dicotyledonous weeds of more than 95%, the control effects of 30% of mesosulfuron-methyl OD on monocotyledonous and dicotyledonous weeds are respectively 80.4% and 58.3%, the control effect of 40% of tralkoxydim on monocotyledonous weeds is 75.6%, the control effect of 70% of saflufenacil water dispersible granules on monocotyledonous weeds is not effective, and the control effect of dicotyledonous weeds is 75.0%. Compared with each single agent, the herbicide composition not only improves the control effect on weeds, but also expands the weed control spectrum, and has very obvious difference (P is less than 0.01).
After 45 days of pesticide application and after the weeds are pulled out, the fresh weight of the dispersible oil suspension containing 30 percent of mesosulfuron-tralkoxydim and saflufenacil prepared in the embodiment 1 of the invention is 100 percent, the fresh weight control effect of the dispersible oil suspension containing 30 percent of mesosulfuron-methyl on monocotyledonous and dicotyledonous weeds is more than 70 percent, the fresh weight control effect of 40 percent of trimethylxydim on monocotyledonous weeds is more than 50 percent, and the fresh weight control effect of 70 percent of saflufenacil on dicotyledonous weeds is more than 75 percent.
The comprehensive test results show that compared with the mesotrione oil suspension, the tralkoxydim water dispersible granule and the saflufenacil, the dispersible oil suspension has improved control effect on field weeds and fresh weight control effect, and is safe for field crops.
Example 8
The application site is as follows: the land for growing wheat is planted in the land for growing poplar in Bozhou city, Anhui province, and the corn is the first crop. The fertility of the test soil is uniform and consistent, and the terrain is flat. The soil is clay, the fertility is moderate, and the humidity is moderate. The wheat seeds are sown with Yangmai No. 13, the annual monocotyledonous weeds in the wheat field mainly comprise wild oats, brome, alopecurus, and the like, the dicotyledonous weeds mainly comprise cleavers, acorus gramineus, chickweed, shepherd's purse, and the like, and the distribution is uniform.
The application time is as follows: the medicine is applied in 3-4 leaf stage of wheat, specifically in 2015, 11 months and 20 afternoon.
The application conditions are as follows: the temperature is 10-18 ℃ on sunny days on the day of drug application.
The dosage and the mode of administration are as follows: the application amount is 100 g/mu, and the liquid medicine is prepared by a two-step dilution method. The medical instrument adopts an industrial and agricultural-16 knapsack sprayer, a fan-shaped spray head is arranged, the manual uniform spraying is carried out, the water consumption is 40kg/667m2。
Test groups: the test group comprises a wettable powder test group, an oil suspending agent test group, a water dispersible granule test group and a water dispersible granule test group; the wettable powder prepared in the invention example 3 and containing 50% of mesotrione, tralkoxydim and saflufenacil is sprayed in a dosage of 100 g/mu in a wettable powder test group, the dispersible oil suspending agent test group contains 30% of mesotrione OD30 ml/mu, and the test groups contain 40% of tralkoxydim WG80 g/mu and 70% of saflufenacil WG5 g/mu. Blank control group: spraying clear water according to the same dosage.
The test method comprises the following steps: each test group and blank control group are repeated for 4 times, and each test group and blank control group respectively occupy a test field cell area of 75m2And the cells are randomly arranged. Before drug application, randomly selecting 4 points before drug application in the cells of each test group and blank control group; applying the herbicide for 30d and 45d to investigate the withered and dead number of weeds, calculating the plant control effect and fresh weight control effect by 45d, and respectively recording the number of weeds (plants/m) in each test group and blank control group in each plot2) Calculating the weed control effect (%); after 45 days of pesticide application, the weeds are pulled out and the fresh weight (g/m) is weighed2) And calculating the fresh weight control effect (%).
The herbicidal effects of the individual test groups are shown in the table
TABLE 8 herbicidal effect of various formulations of methyldisulfuron, tralkoxydim and saflufenacil
As can be seen from the above table, after 30 days of application, the wettable powder containing 50% of methyldisulfuron-tralkoxydim and saflufenacil prepared in example 3 of the invention has a control effect on monocotyledonous weeds and dicotyledonous weeds of more than 95%, the control effects on monocotyledonous weeds and dicotyledonous weeds of 30% of methyldisulfuron are respectively 79.4% and 54.5%, the control effect on monophyletic weeds of 40% of trimethylethoxydim is 73.1%, the control effect on monocotyledonous weeds of 70% of saflufenacil water dispersible granules is ineffective, and the control effect on dicotyledonous weeds is 51.1%. Compared with each single agent, the herbicide composition not only improves the control effect on weeds, but also expands the weed control spectrum, and has very obvious difference (P is less than 0.01).
After 45 days of application, the wettable powder containing 50% of mesosulfuron-methyl, tralkoxydim and saflufenacil prepared in the embodiment 3 of the invention has a control effect on monocotyledonous and dicotyledonous weeds of more than 95%, the control effects on monocotyledonous and dicotyledonous weeds containing 30% of mesosulfuron-methyl OD are 82.5% and 56.8% respectively, the control effect on monocotyledonous weeds containing 40% of mesotrione is 74.6%, the control effect on monocotyledonous weeds containing 70% of saflufenacil is ineffective, and the control effect on dicotyledonous weeds is 75.6%. Compared with each single agent, the herbicide composition not only improves the control effect on weeds, but also expands the weed control spectrum, and has very obvious difference (P is less than 0.01).
After 45 days of pesticide application and after the weeds are pulled out, the fresh weight of the wettable powder containing 50 percent of methyldisulfuron-tralkoxydim and saflufenacil prepared in the embodiment 3 is 100 percent, the fresh weight control effect of 30 percent of methyldisulfuron on the monocotyledonous and dicotyledonous weeds is more than 70 percent, the fresh weight control effect of 40 percent of trimethylbenzoxydim on monocotyledonous weeds is more than 70 percent, and the fresh weight control effect of 70 percent of saflufenacil on dicotyledonous weeds is more than 80 percent.
The comprehensive test results show that compared with the mesotrione oil suspending agent, the tralkoxydim water dispersible granule and the saflufenacil, the wettable powder of the mesotrione, the tralkoxydim and the saflufenacil has improved control effect on field weeds and fresh weight control effect, and is safe for field crops.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (4)
1. A compound herbicide for wheat after seedling is characterized in that: the active ingredients of the composition comprise mesosulfuron-methyl, tralkoxydim and saflufenacil, wherein the mass ratio of the mesosulfuron-methyl, the tralkoxydim and the saflufenacil is 10-15: 10-20: 10-35.
2. The compound herbicide as claimed in claim 1, wherein: the mass ratio of the mesosulfuron to the tralkoxydim to the saflufenacil is 10: 15:25.
3. The built herbicide as claimed in any one of claims 1 to 2, wherein: the sum of the mass of the mesosulfuron, the tralkoxydim and the saflufenacil accounts for 1-80% of the total mass of the compound herbicide.
4. The built herbicide as claimed in any one of claims 1 to 2, wherein: the formulation of the compound herbicide comprises wettable powder, water dispersible granules, aqueous emulsion, suspending agent, suspending emulsion, aqueous solution or missible oil.
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| CN106342858A (en) * | 2016-08-26 | 2017-01-25 | 安徽久易农业股份有限公司 | Post-emergence compound herbicide for wheat fields |
| CN106689173A (en) * | 2016-12-19 | 2017-05-24 | 安徽丰乐农化有限责任公司 | Wheatland post-seedling compound weed killer containing thiencarbazone-methyl and clopyralid |
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