CN105851017A - Herbicide mixture for corn field - Google Patents

Herbicide mixture for corn field Download PDF

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Publication number
CN105851017A
CN105851017A CN201610370124.8A CN201610370124A CN105851017A CN 105851017 A CN105851017 A CN 105851017A CN 201610370124 A CN201610370124 A CN 201610370124A CN 105851017 A CN105851017 A CN 105851017A
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China
Prior art keywords
atrazine
acetochlor
corn
weeds
complex weedicide
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CN201610370124.8A
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Inventor
王毅
龚国斌
胡华海
吴永虎
孙澎
程小虎
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Anhui Fengle Agrochemical Co Ltd
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Anhui Fengle Agrochemical Co Ltd
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Priority to CN201610370124.8A priority Critical patent/CN105851017A/en
Publication of CN105851017A publication Critical patent/CN105851017A/en
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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
    • A01N43/72—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with nitrogen atoms and oxygen or sulfur atoms as ring hetero atoms
    • A01N43/80—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with nitrogen atoms and oxygen or sulfur atoms as ring hetero atoms five-membered rings with one nitrogen atom and either one oxygen atom or one sulfur atom in positions 1,2
    • 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
    • A01N37/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom having three bonds to hetero atoms with at the most two bonds to halogen, e.g. carboxylic acids
    • A01N37/18—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom having three bonds to hetero atoms with at the most two bonds to halogen, e.g. carboxylic acids containing the group —CO—N<, e.g. carboxylic acid amides or imides; Thio analogues thereof
    • A01N37/26—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom having three bonds to hetero atoms with at the most two bonds to halogen, e.g. carboxylic acids containing the group —CO—N<, e.g. carboxylic acid amides or imides; Thio analogues thereof containing the group; Thio analogues thereof
    • 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
    • A01N43/64—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with three nitrogen atoms as the only ring hetero atoms
    • A01N43/66—1,3,5-Triazines, not hydrogenated and not substituted at the ring nitrogen atoms
    • A01N43/68—1,3,5-Triazines, not hydrogenated and not substituted at the ring nitrogen atoms with two or three nitrogen atoms directly attached to ring carbon atoms
    • A01N43/70—Diamino—1,3,5—triazines with only one oxygen, sulfur or halogen atom or only one cyano, thiocyano (—SCN), cyanato (—OCN) or azido (—N3) group directly attached to a ring carbon atom

Abstract

The invention discloses a herbicide mixture for a corn field. The herbicide mixture comprises the following effective ingredients: isoxaflutole, acetochlor and atrazine in the weight ratio of (1-80) to (5-80) to (5-80). Three different weed control mechanisms act on weeds; the weed control effect is significant; the herbicide mixture is environmentally friendly, has good safety on corns and is free of an effect on next-stubble crops. Compared with the prior art, the herbicide mixture is capable of preventing and controlling grassy weeds, preventing and controlling broadleaf weeds and sedge weeds and expanding a weed control spectrum, and has a good application prospect.

Description

A kind of corn field complex weedicide
Technical field
The present invention relates to herbicide field, specifically a kind of corn field complex weedicide.
Background technology
Corn is not only the topmost cereal crops of China, one of Ye Shi world staple food crop.Except original producton location Beyond America, China is one of area of popularizing the most of corn planting.Corn is also that whole world total output is the highest Cereal crops, according to statistics, american corn yield in 2012 is 272,432 kilotons, and corn consumption figure is 254,444 Kiloton, is the maximum corn production and marketing state in the whole world, and China's volume of production and marketing in 2012 is only second to the U.S., China in 2012 Corn yield 200,000 kiloton, consume 201,000 kiloton.But crop smothering seriously restricts the stable high yield of corn, The long-term occurring area of China's corn field weed, more than 3.5 hundred million mu times, can cause corn loss about 9,500,000,000 every year Kilogram.Therefore, the use ratio of domestic corn field herbicide nearly reaches 100%, and its dosage is the biggest.
Isoxazole humulone is effective inhibitor of HPPD (4 one hydroxyphenyl pyravate dual oxide enzyme), to environment friend Good, can degrade the most widely, isoxazole humulone does soil treatment for the Dry crop such as corn, sugarcane field A kind of organic heterocyclic class selectivity internal-suction type herbicide before seedling stage, mainly acts as via weeds young root Assimilation and conductivity With.After susceptible weeds absorbs this medicine, destroy chlorophyllous shape by suppression ethyl-para-hydroxyphenyl ketone dioxygenase Becoming, the weeds chlorosis that causes being injured is withered.Isoxazole humulone is when using or after using, because soil moisture content is bad Though the active ingredient being stranded in topsoil can not give play to the effect of management of weeds in time, but remains to keep Long period is not decomposed, rainfall to be run into or irrigation, remains to play the effect of management of weeds, even to growing to The susceptible weeds of 4～5 leaves also can kill and suppress.
Acetochlor is selective bud pre-treatment herbicide, main by monocotyledonous plumule or dicotyledonous plant The hypocotyl of thing absorbs, and absorbs backward upper conduction, mainly by hindering protein to synthesize and Cell growth inhibition, The growth of weeds young shoot, young root is made to stop, so dead.The energy force rate broad-leaved that grassy weed absorbs Acetochlor is miscellaneous Grass is strong, so the effect preventing and kill off grassy weed is better than broad leaved weed.The Acetochlor lasting period 45 in soil About it, mainly by microbial degradation, the mobility in soil is little, is primarily retained in 0-3 cm layer of soil In.
Atrazine is later developed into maximum the removing of world wide production by the Jia Ji company Development and Production of Switzerland in 1958 Grass agent, China started to produce in the seventies.Its weed control spectrum is relatively wide, can prevent and kill off multiple annual gramineae and Broad leaved weed.The main plant root that passes through absorbs and upwards conducts, and suppression weeds are (such as cocklebur, fox-brush Grass, Ambrosia plant and wild cucumber etc.) photosynthesis so that it is withered.It is applicable to corn, Chinese sorghum, sweet The dry crops such as sugarcane, fruit tree, nursery, forest land prevent and kill off lady's-grass, barnyard grass, green bristlegrass, nutgrass flatsedge, amur foxtail, knotweed, Lamb's-quarters, Cruciferae, pulse family weeds, especially have preferable selectivity (because there being detoxication mechanisms in Corn) to corn, Some perennial weeds also there is certain inhibitory action.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of corn field complex weedicide, can prevent and kill off grass family miscellaneous Grass, can prevent and kill off again broad leaved weed, and respond well.
The present invention is achieved by the following technical solutions:
A kind of corn field complex weedicide, described complex weedicide includes effective constituent, and its effective ingredient is by different Azoles humulone, Acetochlor and atrazine composition, wherein the weight ratio of isoxazole humulone, Acetochlor and atrazine is 1～80:5～80:5～80.
Scheme further, the weight ratio of described isoxazole humulone, Acetochlor and atrazine is 4～7:30～10: 10～30.
Scheme further, the quality of described effective ingredient accounts for the 0.1～90% of complex weedicide gross weight.
Further scheme, the quality of described effective ingredient accounts for the 11～80% of complex weedicide gross weight.
Scheme further, described complex weedicide also includes that auxiliary agent and carrier, described auxiliary agent include dispersant, profit Humectant, disintegrant, binding agent, thickener, preservative and safener.
Further scheme, described dispersant, wetting agent, disintegrant, binding agent, thickener, preservative and The percentage by weight of safener be respectively 0.1～20%, 0～10%, 0～20%, 0～20%, 0～10%, 0～5%, 0.1～5%, surplus is carrier.
Scheme further, the formulation of described complex weedicide is for dispersibling oil-suspending agent, granule, wettable powder Agent, water dispersible granules or aqueous suspension agent.
The present invention is pressed down with hindering protein to synthesize by the isoxazole humulone of suppression ethyl-para-hydroxyphenyl ketone dioxygenase The Acetochlor of cell processed growth and the atrazine of inhibited photosynthesis, utilize three kinds of different mechanisms altogether Same-action is in weeds, and not only herbicidal effect is notable, and environmentally friendly, has good security to corn, On second stubble crop without impact；Compared with prior art, can to prevent and kill off grass family miscellaneous for complex weedicide of the present invention Grass, can prevent and kill off again broad leaved weed and sedge weed, expands weed control spectrum, has a good application prospect.
Security test test to corn shows, isoxazole humulone Acetochlor atrazine soil treatment, The ED of suppression corn growth 10%10=1968.0878mg/kg, suppression weed growth 90% ED90=253.2570mg/kg, selectivity factor is 1968.0878/253.2570=7.77 > 2, it is believed that this medicament Having obvious selectivity, isoxazole humulone Acetochlor atrazine has good security to corn.
Complex weedicide of the present invention is shown by the field control effectiveness test of 2 years, Seal treatment before maize seedling, beautiful Rice has no symptom of chemical damage, to corn safety from dispenser to maturity period.The preventive effect of weeds reaches more than 92% in 10 days, Within 40 days, reaching more than 80%, along with the increase of dosage, preventive effect is remarkably reinforced, and a dispenser can control crop Weeds in whole growth period, not only herbicidal effect is notable, and environmentally friendly, on second stubble crop without impact.
Compared with prior art, complex weedicide of the present invention can prevent and kill off grassy weed, can prevent and kill off again wealthy Leaf weeds and sedge weed, to corn safety, and on succession crop without impact, have a good application prospect.
Detailed description of the invention
For being best understood from the present invention, below in conjunction with embodiment, the invention will be further described, and following example are only It is that the present invention will be described rather than it is limited.
Embodiment 1
28% isoxazole humulone Acetochlor atrazine water dispersible granule (8:10:10): 8g isoxazole humulone, 10g Acetochlor, 10g atrazine, 10kg dispersant D-425 (naphthalenesulfonate formaldehyde condensation compound), 10kg moisten Humectant EFW (alkylnaphthalene sulfonate and the mixture of anion wetting agent), 20kg ammonium sulfate disintegrant, 20kgPVA (polyvinyl alcohol) binding agent, 5kg safener cyclopropyl-sulfonylamide, carrier kaolin 15kg.Above-mentioned group Lease making is sufficiently mixed, air-flow crushing, mixing, granulation obtain product.
Embodiment 2
37% isoxazole humulone Acetochlor atrazine water dispersible granule (7:10:20): 7kg isoxazole grass Ketone, 10kg Acetochlor, 20kg atrazine, 10kg dispersant D-425 (naphthalenesulfonate formaldehyde condensation compound), 5kg wetting agent EFW (alkylnaphthalene sulfonate and the mixture of anion wetting agent), 20kg ammonium sulfate disintegrant, 5kgPVA (polyvinyl alcohol) binding agent, 0.5kg safener cyclopropyl-sulfonylamide, carrier kaolin 22.5kg.Above-mentioned Component is adequately mixed, air-flow crushing, granulation obtain product.
Embodiment 3
46% isoxazole humulone Acetochlor atrazine dispersibles oil-suspending agent (6:20:20): 6kg is different Azoles humulone, 20kg Acetochlor, 20kg atrazine, 15kg dispersant Pluronic125 (block polyether non-from Sub-surface activating agent), 2kg thickener bentonite, 0.5kg safener cyclopropyl-sulfonylamide, carrier methyl oleate 36.5kg.Said components is through being sufficiently mixed allotment, ball mill grinding, adjusting, be packaged to be product.
Embodiment 4
55% isoxazole humulone Acetochlor atrazine aqueous suspension (5:30:20): 5kg isoxazole humulone, 30kg Acetochlor, 20kg atrazine, 10kg dispersant NNO (sodium methylene bis-naphthalene sulfonate), 8kg soak Agent K12 (lauryl sodium sulfate), 0.2kg thickener xanthans, 1kg Preservative Kathon CG(Methylchloroisothiazolinone/Methylisothiazolinone combination), 0.5kg safety Agent cyclopropyl-sulfonylamide, carrier water 25.3kg.Said components is adequately mixed, ball mill grinding, be mixed to get product Product.
Embodiment 5
46% isoxazole humulone Acetochlor atrazine aqueous suspension (6:20:20): 6kg isoxazole humulone, 20kg Acetochlor, 20kg atrazine, 4kg dispersant NNO (sodium methylene bis-naphthalene sulfonate), 3kg wetting agent K12 (lauryl sodium sulfate), 0.3kg thickener xanthans, 0.1kg Preservative Kathon CG(Methylchloroisothiazolinone/Methylisothiazolinone combination), 1.5kg safety Agent cyclopropyl-sulfonylamide, carrier water 45.1kg.Said components is adequately mixed, ball mill grinding, be mixed to get product Product.
Embodiment 6
47% isoxazole humulone Acetochlor atrazine dispersibles oil-suspending agent (4:21.5:21.5): 4kg is different Azoles humulone, 21.5kg Acetochlor, 21.5kg atrazine, (block gathers 15kg dispersant Pluronic125 Ether nonionic surfactant), 2kg thickener bentonite, 1kg safener cyclopropyl-sulfonylamide, carrier oleic acid Methyl esters 35kg.Said components is through being sufficiently mixed allotment, ball mill grinding, adjusting, be packaged to be product.
Embodiment 7
61% isoxazole humulone Acetochlor atrazine water dispersible granule (5:28:28): 5kg isoxazole grass Ketone, 28kg Acetochlor, 28kg atrazine, 4kg dispersant D-425 (naphthalenesulfonate formaldehyde condensation compound), 1kg Wetting agent EFW (alkylnaphthalene sulfonate and the mixture of anion wetting agent), 1kgPVA (polyvinyl alcohol) bond Agent, 1kg safener cyclopropyl-sulfonylamide, carrier kaolin 32kg.Said components is adequately mixed, air-flow crushing, Granulation obtains product.
Embodiment 8
80% isoxazole humulone Acetochlor atrazine water dispersible granule (8:35:37): 8kg isoxazole grass Ketone, 35kg Acetochlor, 37kg atrazine, 4kg dispersant D-425 (naphthalenesulfonate formaldehyde condensation compound), 1kg Wetting agent EFW (alkylnaphthalene sulfonate and the mixture of anion wetting agent), 1kgPVA (polyvinyl alcohol) bond Agent, 1kg safener cyclopropyl-sulfonylamide, carrier kaolin 13kg.Said components is adequately mixed, air-flow crushing, Granulation obtains product.
Embodiment 9
64% isoxazole humulone Acetochlor atrazine water dispersible granule (4:30:30): 4kg isoxazole grass Ketone, 30kg Acetochlor, 30kg atrazine, 4kg dispersant D-425 (naphthalenesulfonate formaldehyde condensation compound), 1kg Wetting agent EFW (alkylnaphthalene sulfonate and the mixture of anion wetting agent), 1kgPVA (polyvinyl alcohol) bond Agent, 1kg safener cyclopropyl-sulfonylamide, carrier kaolin 29kg.Said components is adequately mixed, air-flow crushing, Granulation obtains product.
Embodiment 10: isoxazole humulone, Acetochlor and atrazine cauline leaf process synergy toxicity and measure Test
Under greenhouse experiment, use pot-culture method, research isoxazole humulone, Acetochlor and atrazine ternary Compounding herbicidal effect, and evaluate the synergy after three's different proportion is used with by the co-toxicity coefficient method of Sun Yunpei Type, provides scientific basis for isoxazole humulone, Acetochlor with the rational mixture of atrazine.
For studying thing corn variety: Zheng Dan 958
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.), difformed galingale herb (Cyperus difformis L.) (upper one year, gathered seed, and germination percentage exists by field More than 85%).
The former medicine of reagent agent 97% isoxazole humulone (BASF European Co., Ltd)；98% acetochlor tc (river Su Sheng agricultural Hormone engineering Technical Research Center Co., Ltd)；(Xuanhua, Hebei agricultural chemicals has the 92% former medicine of atrazine Limit responsible company).
Weigh quantitative former medicine with electronic balance, add appropriate emulsifying agent, with acetone solution, finally with 0.1% The POLYSORBATE 80 aqueous solution above-mentioned former medicine is diluted to desired concn.
Acetochlor and the synergy of atrazine
Acetochlor, atrazine single dose and 5 Acetochlors are set 5 dosage, separately respectively with atrazine mixture preparation If blank, each test processes and is repeated 4 times.Treatment agent dosage refers to table 1.
Table 1 test process and test level (consumption g a.i./667)
The optimal mixture of Acetochlor and atrazine and the synergy of isoxazole humulone
Acetochlor atrazine mixture, isoxazole humulone single dose and 5 mixture preparations are set 5 dosage respectively, Separately setting blank, each test processes and is repeated 4 times.Treatment agent dosage refers to table 2.
Table 2 test process and test level (concentration g a.i./667)
In corn 3 leaf phase, weeds 2-4 leaf phase cauline leaf spraying treatment.Test and carry out on June 5th, 2015 Reagent spray processes, dispenser 1 time.Detailed record corn and the damage symptoms of weeds after dispenser, 20d after medicine, Carry out fresh weight measurement, and compared with control treatment, calculate fresh weight preventive effect.
Synergy type after the co-toxicity coefficient method evaluation of result of the test Sun Yunpei is mixed.According to SUN, Y-P (Sun Yunpei) method calculates its actual toxicity index, mixture theory toxicity index, co-toxicity coefficient.With log concentration For X, pest and disease damage preventive effect probit value is Y, seeks regression equation.
LD50 × 100 of actual toxicity index=standard agent LD50/ mixture
Theoretical toxicity index=∑ (percentage of this medicament active ingredient of the toxicity index of reagent agent × in mixture Rate)
Actual toxicity index/theory toxicity index × 100 of co-toxicity coefficient=mixture
With isoxazole humulone, atrazine as standard agent in test.
Criterion: co-toxicity coefficient<80 is antagonism, is summation action between 80-120,>120 is Synergistic effect.
Acetochlor is as shown in table 3 below with the synergy of atrazine:
The 20d fresh weight preventive effect to weeds after table 3 Acetochlor and atrazine mixture medicine
In table, prevention effect is the mean value of four data.
As shown in Table 3: medicament is to the toxic action situation of weeds and preventive effect.Its respective poison is calculated by formula Power regression equation, LD50, actual toxicity index, theoretical toxicity index and co-toxicity coefficient.It is listed in table 4.
Table 4: atrazine and the synergy to weeds of the Acetochlor mixture
From test, the co-toxicity coefficient of process C, D, E, F, G is respectively as follows: 188.76,222.47, 260.85,240.72,213.79, co-toxicity coefficient is all higher than 120, has synergistic effect, particularly processes E Co-toxicity coefficient be 260.85 to the maximum, there is notable synergistic effect, annual single broadleaf weed had aobvious The synergistic effect write.
Acetochlor mixture optimal with atrazine (Acetochlor: atrazine=20:20) is combined with isoxazole humulone Act on as shown in table 5 below:
Table 5 Acetochlor fresh weight preventive effect to weeds mixed with isoxazole humulone with the optimal mixture of atrazine
In table, prevention effect is the mean value of four data.
As shown in Table 5: medicament is to the toxic action situation of weeds and preventive effect.Its respective poison is calculated by formula Power regression equation, LD50, actual toxicity index, theoretical toxicity index and co-toxicity coefficient.It is listed in table 6.
Table 6: Acetochlor atrazine mixed ratio different from isoxazole humulone is to the indoor virulence of weeds and synergy
Process Regression equation Coefficient correlation LD50 Actual toxicity index Theoretical toxicity index Coefficient of synergism
A Y=1.8644x+3.2414 0.9925 8.7753 100 / /
B Y=1.9369x+2.4770 0.9946 2.1379 410.46 / /
C Y=1.8549x+3.8474 0.9970 4.1817 209.85 188.70 111.21
D Y=1.8923x+3.8754 0.9977 3.9295 223.32 158.73 140.69
E Y=1.9106x+3.9241 0.9979 3.6569 239.97 140.50 170.80
F Y=1.8323x+3.8379 0.9971 4.3077 203.71 128.22 158.88
G Y=1.7802x+3.7734 0.9990 4.8870 179.56 119.40 150.39
From test, the co-toxicity coefficient of process C, D, E, F, G is respectively as follows: 111.21,140.69, 170.80,158.88,150.39, co-toxicity coefficient is all higher than 80, have addition or synergistic effect, D, E, F, The co-toxicity coefficient of G is more than 120, has synergistic effect, and the co-toxicity coefficient of particularly E is maximum, reaches significantly to increase Effect effect.
By test, isoxazole humulone, Acetochlor and three kinds of active components of atrazine are by weight for 4-7: 30-10:10-30 compounds, and has significant synergies annual single broadleaf weed.The most different Azoles humulone, Acetochlor and atrazine are maximum with the co-toxicity coefficient that the part by weight of 6:20:20 is compounding, weeding Effect is best.
Embodiment 11: raw experimental result of surveying:
One, the Security test of corn is tested by isoxazole humulone Acetochlor atrazine soil treatment:
1, test objective: under greenhouse experiment, uses pot-culture method, research isoxazole humulone, second grass Amine and the security to corn of the atrazine ternary built soil treatment, for isoxazole humulone, Acetochlor and atrazine Rational mixture provide scientific basis.
2, for studying thing: corn variety Zheng Dan 958: lady's-grass (Digitaria sanguinalis (Linn.) Scop.), green bristlegrass (Setaria viridis (L.) Beauv.), acalypha copperleaf (Acalypha Australis L.), lamb's-quarters (Chenopodium album L.), difformed galingale herb (Cyperus difformis L.) (upper one year gathered seed in field, and germination percentage is more than 85%).
3, in illumination cultivation room, carry out the cultivation of test material, temperature 25～30 DEG C.Choose a diameter of 15cm, It it is highly the vinyon basin alms bowl of 15cm.During test, by 20, every kind weed seed 30 of corn seed～ Uniformly put into earthing 0.5cm in basin for 40, from low concentration to high concentration, spray medicine successively, after spray medicine, be placed on ventilation Dry, in being then placed in greenhouse, cultivate (25～30 DEG C).In the way of the infiltration of bottom, regular moisturizing is (after medicine 2 Do not water in it), keep soil moisture.
4, reagent agent: the former medicine of 98% isoxazole humulone (Anhui Fengle Agricultural Co., Ltd provides for oneself)；97% Acetochlor tc (Anhui Zhong Shan Chemical Co., Ltd.)；97% atrazine (Shandong Binnong Technology Co., Ltd.). Weigh quantitative former medicine with electronic balance, add appropriate emulsifying agent, with acetone solution, finally with 0.1% Above-mentioned former medicine is diluted to desired concn by the Tween 80 aqueous solution.
5, application method: soil spraying treatment in 2-3 days after after corn is broadcast.Spray medicine uses the room of adjustable speed Interior crown-block type atomizing tester, simulation field conventional spraying methods.Shower nozzle is Fan spray head, and model is Teejer8002E type, spray value 40 kgs/acre.Spray height 0.5 meter, spraying swath 0.7 meter, leg speed 0.224 Meter per second.Atomisation pressure 2.0 MPas, flow 697 liters/min.Soil spray in 2-3 days after testing after corn is broadcast Mist processes, dispenser 1 time.
6, investigation and computational methods:
Blank corn neat seedling " Invest, Then Investigate " respectively processes with or without symptom of chemical damage, if having, record in detail symptom of chemical damage, Grade, after medicine 20 days, measures each process corn fresh weight, calculates fresh weight inhibition, with clear and definite test medicine pair The security of corn.
After dispenser, in detail record weeds emerge situation and damage symptoms (such as growth inhibition, chlorosis, deformity etc.), After medicine 20 days, weigh each process weeds aerial part fresh weight, calculate the fresh weight preventive effect of weeds.
With DPS software, the logarithm value of drug dose and the probability value of corn fresh weight inhibition are carried out regression analysis, Calculate dosage ED when coefficient correlation and suppression crop 10%10, and dosage ED during suppression weeds 90%90, obtain Selectivity index.Wherein, selectivity index=ED10/ED90。
7, result and analysis:
By 61% isoxazole humulone Acetochlor atrazine water dispersible granule soil treatment of embodiment 7 to corn Impact:
Safety evaluatio standard is shown in Table 7, observes (15d after medicine), 60% isoxazole humulone second after the neat seedling of blank Grass amine atrazine water dispersible granule high concentration 1600mg/kg processes indivedual corn lobus cardiacuses slight jaundice, growth Slightly being suppressed, it is normal that other concentration processes corn growth；After dispenser 20 days, 1600mg/kg processed jade Rice the most slowly recovers.After dispenser 20 days, 60% isoxazole humulone Acetochlor atrazine water dispersible granule was to jade The inhibitory action of rice is shown in Table 8.Table 9 is after dispenser 20 days, 60% isoxazole humulone Acetochlor atrazine moisture Shot agent is to the toxic action situation of weeds and preventive effect.
Table 7 activity of weeding and crop safety ocular estimate evaluation criterion
After dispenser 20 days, (60% referred to isoxazole to 60% isoxazole humulone Acetochlor atrazine water dispersible granule Humulone, Acetochlor and three kinds of active components of atrazine account for the percentage of gross weight) inhibitory action of corn is shown in Table 8.
The table 8:61% isoxazole humulone Acetochlor atrazine water dispersible granule inhibitory action to corn
The table 9:61% isoxazole humulone Acetochlor atrazine water dispersible granule fresh weight preventive effect to weeds
This medicament is to the toxic action situation of weeds and preventive effect as shown in Table 9, calculates its toxicity regression by formula Equation, LD50, it is listed in table 10.
Table 10 virulence regression equation and LD50
Process Regression equation Coefficient correlation LD50 95% confidential interval
A Y=0.5743+2.3745x 0.9927 73.0885 63.4344～84.2118
As shown in Table 10: the LD of 60% isoxazole humulone Acetochlor atrazine water dispersible granule50For: 73.0885mg/kg, 95% confidential interval is 63.4344 84.2118mg/kg.
Isoxazole humulone Acetochlor atrazine soil treatment is to corn and the selectivity index of weeds: by table 9, Table 10, tries to achieve the ED of suppression corn growth 10% by DPS software10=1968.0878mg/kg, suppresses weeds The ED of growth 90%90=253.2570mg/kg, selectivity factor is 1968.0878/253.2570=7.77 > 2, Think that this medicament has obvious selectivity, field control effectiveness test can be carried out.
Overall merit: this result of the test shows, isoxazole humulone Acetochlor atrazine soil treatment high concentration (4 times of RD high dose) process can cause corn yellow to corn, and other concentration processes (recommends Dosage high dose and times amount thereof) corn growth is normal.By Toxicity Determination, isoxazole humulone second Grass amine atrazine corn has good security, has good prevention effect to weeds.
Two, 22% isoxazole humulone Acetochlor atrazine herbicide and the field efficacy of single herbicide Test:
Being shown by the field control effectiveness test of 2 years, in the corn 3 leaf phase, weeds 2-5 leaf does not waits the phase, utilizes 46% isoxazole humulone Acetochlor atrazine of the embodiment of the present invention 3 dispersibles oil-suspending agent (6:20:20) (OD), dosage 80,100,120,200 milliliter/mu, be watered 40 kgs/acre and spray, 10,30 days and Maturity period range estimation corn safety and Weed-control effect, surveys all preventive effects for 10,30 days, and with single sprinkling 150 milli Liter/mu 2.5% isoxazole humulone dispersibles oil-suspending agent, 80 milliliter/mu 15% Acetochlor suspending agents compare, Result such as table 11 below:
Table 11
Note: in table 11, each data of blank are weeds strain number (strain), and other each data are strain preventive effect (%).
By range estimation, corn has no symptom of chemical damage from dispenser to maturity period, to corn safety.46% isoxazole grass Ketone Acetochlor atrazine dispersibles the oil-suspending agent 80 milliliter/mu preventive effect to weeds, within 10 days, reach 80% with On, within 40 days, reach more than 92%, along with the increase of dosage, preventive effect is remarkably reinforced, corn field 80 milliliters/ Mu can have good herbicidal effect to weeds, compares with being used alone one of which active ingredient, expands and kill Grass spectrum, has obvious synergistic effect to grassy weed and broad leaved weed.It is whole that dispenser can control crop Weeds in individual growth period, not only herbicidal effect is notable, and environmentally friendly, on second stubble crop without impact, Pollution to environment is little, to people, animal, birds and beneficial organism safety, is conducive to keeping ecological balance.It addition, The herbicide of the present invention uses physical method processing, and production technology is simple, and three-waste free discharge in production process is right Ecological environment has no adverse effects.It it is the preferable complex weedicide of current prevention effect.
Three, the field efficacy examination of other different ratio isoxazole humulone Acetochlor atrazine herbicide Test:
By to other different ratio isoxazole humulone Acetochlor atrazine herbicide field medicine of 2 years Effect test show, in the corn 3 leaf phase, weeds 2-5 leaf not wait the phase, utilize the application preceding embodiment 1, Embodiment 2, embodiment 4, embodiment 6 and the pharmaceutical formulation of embodiment 9, each plant demand is as shown in table 12, And be watered 40 kgs/acre and spray, 10,30 days and maturity period range estimation corn safety and Weed-control effect, 10, Within 30 days, survey all preventive effects, result such as table 12 below:
The table 12 different ratio isoxazole humulone Acetochlor atrazine effect to weeds
Note: in table 12, each data of blank are weeds strain number (strain), and other each data are strain preventive effect (%).
By range estimation, corn from after planting dispenser to emerging, Adult plant, knot rod phase have no symptom of chemical damage, to jade Meter ampere is complete.Embodiment 1, embodiment 2, embodiment 4, embodiment 6, each plant demand pair of medicament of embodiment 9 The preventive effect of weeds, reaches more than 92% in 10 days, and within 30 days, preventive effect is thrown away and reached more than 72%.Embodiment 1,2,4, Complex weedicide made by 6 and 9 all has certain preventive effect to all types of weeds, and along with active ingredient ratio With the increase of dosage, preventive effect is remarkably reinforced, and normal usage can reach reasonable preventive effect.
The dispenser of the complex weedicide of the present invention can control the weeds in crop whole growth period, not only weeding Effect is notable, and environmentally friendly, and on second stubble crop without impact, the pollution to environment is little, to people, animal, Birds and beneficial organism safety, be conducive to keeping ecological balance.It addition, the herbicide of the present invention uses physics side Method is processed, and production technology is simple, and ecological environment is had no adverse effects by three-waste free discharge in production process.It it is mesh The preferable complex weedicide of front prevention effect.
The above embodiment is only to be described the preferred embodiment of the present invention, not to the present invention Scope be defined, on the premise of designing spirit without departing from the present invention, those of ordinary skill in the art to this The various deformation made of technical scheme of invention and improvement, all should fall into the guarantor that claims of the present invention determines In the range of protecting.

Claims (7)

1. a corn field complex weedicide, described complex weedicide includes effective constituent, it is characterized in that: described effective ingredient is made up of isoxazole humulone, Acetochlor and atrazine, wherein the weight ratio of isoxazole humulone, Acetochlor and atrazine is 1～80:5～80:5～80.
A kind of corn field complex weedicide the most according to claim 1, it is characterised in that: the weight ratio of described isoxazole humulone, Acetochlor and atrazine is 4～7:30～10:10～30.
A kind of corn field complex weedicide the most according to claim 1, it is characterised in that: the quality of described effective ingredient accounts for the 0.1～90% of complex weedicide gross weight.
A kind of corn field complex weedicide the most according to claim 3, it is characterised in that: the quality of described effective ingredient accounts for the 11～80% of complex weedicide gross weight.
A kind of corn field complex weedicide the most according to claim 1, it is characterised in that: described complex weedicide also includes that auxiliary agent and carrier, described auxiliary agent include dispersant, wetting agent, disintegrant, binding agent, thickener, preservative and safener.
A kind of corn field complex weedicide the most according to claim 5, it is characterized in that: the percentage by weight of described dispersant, wetting agent, disintegrant, binding agent, thickener, preservative and safener is respectively 0.1～20%, 0～10%, 0～20%, 0～20%, 0～10%, 0～5%, 0.1～5%, and surplus is carrier.
7. according to a kind of corn field complex weedicide described in any one of claim 1～6, it is characterised in that: the formulation of described complex weedicide is for dispersibling oil-suspending agent, granule, wettable powder, water dispersible granules or aqueous suspension agent.
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Publication number Priority date Publication date Assignee Title
CN109769838A (en) * 2019-03-29 2019-05-21 吉林金秋农药有限公司 Herbicidal combinations, its purposes and herbicide and preparation method thereof
CN111919850A (en) * 2020-08-23 2020-11-13 南通江山农药化工股份有限公司 Weeding composition containing acetochlor and isoxaflutole
CN112136619A (en) * 2020-09-22 2020-12-29 大庆市农业技术推广中心 Weeding method based on no-burning, line-collecting, covering, returning and no-tillage seeding of corn straws 4090

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DE19834627A1 (en) * 1998-07-31 1998-12-03 Novartis Ag Broad-spectrum pre- or post=emergence herbicidal composition
CN1527666A (en) * 2001-06-13 2004-09-08 �����ɷ� Herbicidal composition
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109769838A (en) * 2019-03-29 2019-05-21 吉林金秋农药有限公司 Herbicidal combinations, its purposes and herbicide and preparation method thereof
CN111919850A (en) * 2020-08-23 2020-11-13 南通江山农药化工股份有限公司 Weeding composition containing acetochlor and isoxaflutole
CN112136619A (en) * 2020-09-22 2020-12-29 大庆市农业技术推广中心 Weeding method based on no-burning, line-collecting, covering, returning and no-tillage seeding of corn straws 4090

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