CN112535177B - Corn field herbicide containing composite auxiliary agent - Google Patents

Corn field herbicide containing composite auxiliary agent Download PDF

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CN112535177B
CN112535177B CN202011430655.4A CN202011430655A CN112535177B CN 112535177 B CN112535177 B CN 112535177B CN 202011430655 A CN202011430655 A CN 202011430655A CN 112535177 B CN112535177 B CN 112535177B
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parts
auxiliary agent
sodium
essential oil
corn field
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CN112535177A (en
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胡延勋
孙明星
卜祥强
其他发明人请求不公开姓名
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Ganzhou Jiuchuang Technology Co ltd
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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
    • 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
    • A01N25/00—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests
    • A01N25/22—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests containing ingredients stabilising the active ingredients
    • 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
    • A01N25/00—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests
    • A01N25/30—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests characterised by the surfactants
    • 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
    • A01N27/00—Biocides, pest repellants or attractants, or plant growth regulators containing hydrocarbons
    • 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
    • A01N31/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic oxygen or sulfur compounds
    • A01N31/04—Oxygen or sulfur attached to an aliphatic side-chain of a carbocyclic ring system
    • 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
    • A01N37/36—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 at least one carboxylic group or a thio analogue, or a derivative thereof, and a singly bound oxygen or sulfur atom attached to the same carbon skeleton, this oxygen or sulfur atom not being a member of a carboxylic group or of a thio analogue, or of a derivative thereof, e.g. hydroxy-carboxylic acids
    • A01N37/38—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 at least one carboxylic group or a thio analogue, or a derivative thereof, and a singly bound oxygen or sulfur atom attached to the same carbon skeleton, this oxygen or sulfur atom not being a member of a carboxylic group or of a thio analogue, or of a derivative thereof, e.g. hydroxy-carboxylic acids having at least one oxygen or sulfur atom attached to an aromatic ring system
    • A01N37/40—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 at least one carboxylic group or a thio analogue, or a derivative thereof, and a singly bound oxygen or sulfur atom attached to the same carbon skeleton, this oxygen or sulfur atom not being a member of a carboxylic group or of a thio analogue, or of a derivative thereof, e.g. hydroxy-carboxylic acids having at least one oxygen or sulfur atom attached to an aromatic ring system having at least one carboxylic group or a thio analogue, or a derivative thereof, and one oxygen or sulfur atom attached to the same aromatic ring system
    • 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
    • A01N41/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a sulfur atom bound to a hetero atom
    • A01N41/02—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a sulfur atom bound to a hetero atom containing a sulfur-to-oxygen double bond
    • A01N41/10—Sulfones; Sulfoxides
    • 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
    • A01N43/02—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one or more oxygen or sulfur atoms as the only ring hetero atoms
    • A01N43/04—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one or more oxygen or sulfur atoms as the only ring hetero atoms with one hetero atom
    • A01N43/14—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one or more oxygen or sulfur atoms as the only ring hetero atoms with one hetero atom six-membered rings
    • A01N43/16—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one or more oxygen or sulfur atoms as the only ring hetero atoms with one hetero atom six-membered rings with oxygen as the ring hetero atom
    • 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
    • A01N65/00—Biocides, pest repellants or attractants, or plant growth regulators containing material from algae, lichens, bryophyta, multi-cellular fungi or plants, or extracts 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
    • A01N65/00—Biocides, pest repellants or attractants, or plant growth regulators containing material from algae, lichens, bryophyta, multi-cellular fungi or plants, or extracts thereof
    • A01N65/08—Magnoliopsida [dicotyledons]
    • A01N65/12—Asteraceae or Compositae [Aster or Sunflower family], e.g. daisy, pyrethrum, artichoke, lettuce, sunflower, wormwood or tarragon
    • 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
    • A01N65/00—Biocides, pest repellants or attractants, or plant growth regulators containing material from algae, lichens, bryophyta, multi-cellular fungi or plants, or extracts thereof
    • A01N65/08—Magnoliopsida [dicotyledons]
    • A01N65/22—Lamiaceae or Labiatae [Mint family], e.g. thyme, rosemary, skullcap, selfheal, lavender, perilla, pennyroyal, peppermint or spearmint

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Abstract

The invention relates to a corn field herbicide containing a compound auxiliary agent, which comprises 50-80 wt% of a weeding component, 10-40 wt% of a first auxiliary agent and 3-15 wt% of a second auxiliary agent, wherein the weeding component comprises 2-4:1 wt% of mesotrione and pyrithiobac-sodium, the first auxiliary agent comprises 5-25 parts of a surfactant, 5-15 parts of a dispersant, 5-15 parts of a cosolvent and 5-15 parts of a thickening agent, and the second auxiliary agent comprises 5-20 parts of coumarin, 10-40 parts of nipagin ethyl ester sodium salt, 5-20 parts of basil essential oil and 5-20 parts of artemisia ferrostemi essential oil. The herbicide disclosed by the invention is used by matching mesotrione and pyrithiobac-sodium, is effective to gramineous weeds and broadleaf weeds, is quick in weed control effect, obvious in pesticide effect and long in duration, and can be used for reducing the dosage, reducing the phytotoxicity and reducing the residues by compounding.

Description

Corn field herbicide containing composite auxiliary agent
Technical Field
The invention relates to the technical field of herbicides, and in particular relates to a corn field herbicide containing a composite auxiliary agent.
Background
Herbicides are agents which cause complete or selective death of weedsAgents, a class of substances used to destroy or inhibit the growth of plants. Herbicides, also known as herbicides, are chemical agents that kill weeds or harmful plants without affecting the normal growth of crops, and can be used to control farmland weeds or to kill weeds or shrubs in non-agricultural lands. Mesotrione (mesotrione), also known as mesotrione, of formula C14H13NO7S molecular weight 339.32. The 100 g/L mesotrione suspending agent has better control effect on annual broadleaf weeds and partial gramineous weeds such as abutilon, amaranth, chenopodium album, polygonum, cockspur grass, crabgrass and the like in corn fields, and has poorer control effect on acalypha australis and some gramineous weeds. Pyrithiobac-sodium, 2-chloro-6- (4, 6-dimethoxypyrimidin-2-ylthio) benzoate, formula C13H10ClN2NaO4S, molecular weight 348.74. The pyrithiobac-sodium is a side chain amino acid synthesis inhibitor, is commonly used for preventing and treating cotton fields due to high degradation speed in cotton crops, has obvious effect on annual and perennial broadleaf weeds and grassy weeds, is high-efficiency and low-toxicity, but the pyrithiobac-sodium with obvious weeding effect is only applied to the cotton fields at present, and has a narrow popularization range. And a certain herbicide is singly used, so that the using amount is large, the cost is high, and the control effect is limited. The scientific and reasonable chemical herbicide mixing has the characteristics of expanding a weeding spectrum, improving a weeding effect, reducing the dosage, reducing phytotoxicity, reducing residues, delaying and treating the occurrence and development of resistant weeds and the like, and is one of the most effective and convenient methods for solving the problems.
Disclosure of Invention
The invention aims to solve the technical problems and the defects and provides a corn field herbicide containing a composite auxiliary agent.
In order to solve the technical problems, the invention adopts the technical scheme that: a corn field herbicide containing a compound auxiliary agent comprises, by weight, 50-80% of a weeding component, 10-40% of a first auxiliary agent and 3-15% of a second auxiliary agent, wherein the weeding component comprises, by weight, 2-4:1 of mesotrione and pyrithiobac-sodium, the first auxiliary agent comprises, by weight, 5-25 parts of a surfactant, 5-15 parts of a dispersant, 5-15 parts of a cosolvent and 5-15 parts of a thickener, and the second auxiliary agent comprises, by weight, 5-20 parts of coumarin, 10-40 parts of ethylparaben sodium salt, 5-20 parts of basil essential oil and 5-20 parts of artemisia scoparia essential oil.
The corn field herbicide containing the composite auxiliary agent is further optimized: the surfactant is one or the combination of any more of sodium dodecyl benzene sulfonate, calcium dodecyl benzene sulfonate, tristyrylphenol polyoxyethylene ether, octadecanol-based polyoxyethylene ether, dibenzyl biphenyl polyoxyethylene ether, styrol polyoxyethylene ether and fatty alcohol polyoxyethylene ether.
The corn field herbicide containing the composite auxiliary agent is further optimized: the cosolvent is one or the combination of any more of methanol, ethanol, n-butanol, isobutanol, propylene glycol, ethylene glycol or glycerol.
The corn field herbicide containing the composite auxiliary agent is further optimized: the dispersing agent is one or the combination of any more of sodium lignosulfonate, sodium methylene dinaphthalene sulfonate, calcium lignosulfonate, sodium polyacrylate and methylene dinaphthalene sulfonate formaldehyde condensate.
The corn field herbicide containing the composite auxiliary agent is further optimized: the thickener is one of xanthan gum, polyvinyl alcohol, sodium alginate and starch.
The invention has the following beneficial effects:
the herbicide disclosed by the invention is used by matching mesotrione and pyrithiobac-sodium, is effective on gramineous weeds and broadleaf weeds, is quick in weed control effect, obvious in pesticide effect and long in duration, and can be used for reducing the dosage, reducing the phytotoxicity and reducing the residues by compounding. The herbicide is mainly used for corn fields to prevent and kill off annual and perennial grassy weeds such as broadleaf weeds such as abutilon, purslane, redroot amaranth, chenopodium album, polygonum, cockspur grass, digitaria sanguinea, wild oat, green bristlegrass, bluegrass, aloesli, eclipta, black nightshade, amaranth and the like.
Secondly, coumarin is added into the auxiliary agent, and the coumarin serving as a flavonoid compound can promote the degradation of the pyrithiobac-sodium in the corn, relieve the salt stress of the corn field and improve the stability of corn plants. The ethylparaben sodium in the adjuvant has antibacterial and antiseptic effects, can improve the stability and comprehensive effect of the herbicide, has good water solubility due to belonging to sodium salt, can form a weak acid environment, enhances the effect of reducing dynamic surface tension of the surfactant, and is more beneficial to improving the penetration of the active ingredients of the herbicide.
The invention uses the compound auxiliary agent, wherein the basil essential oil contains basilene and limonene, the artemisia scoparia essential oil contains terpineol, and the basilene, the limonene, the terpineol and the ethylparaben sodium salt act together, so that the permeability of the herbicide can be obviously promoted, the herbicide takes effect quickly, and a remarkable synergistic effect is achieved.
Detailed Description
The technical solution of the present invention will be clearly and completely described below with reference to the embodiments of the present invention.
A corn field herbicide containing a compound auxiliary agent comprises, by weight, 50-80% of a weeding component, 10-40% of a first auxiliary agent and 3-15% of a second auxiliary agent, wherein the weeding component comprises, by weight, 2-4:1 of mesotrione and pyrithiobac-sodium, the first auxiliary agent comprises, by weight, 5-25 parts of a surfactant, 5-15 parts of a dispersant, 5-15 parts of a cosolvent and 5-15 parts of a thickener, and the second auxiliary agent comprises, by weight, 5-20 parts of coumarin, 10-40 parts of ethylparaben sodium salt, 5-20 parts of basil essential oil and 5-20 parts of artemisia scoparia essential oil.
The surfactant is one or the combination of any more of sodium dodecyl benzene sulfonate, calcium dodecyl benzene sulfonate, tristyrylphenol polyoxyethylene ether, octadecanol-based polyoxyethylene ether, dibenzyl biphenyl polyoxyethylene ether, styrol polyoxyethylene ether and fatty alcohol polyoxyethylene ether. The cosolvent is one or the combination of any more of methanol, ethanol, n-butanol, isobutanol, propylene glycol, ethylene glycol or glycerol. The dispersing agent is one or the combination of any more of sodium lignosulfonate, sodium methylene dinaphthalene sulfonate, calcium lignosulfonate, sodium polyacrylate and methylene dinaphthalene sulfonate formaldehyde condensate. The thickener is one of xanthan gum, polyvinyl alcohol, sodium alginate and starch.
The herbicide of the invention is one of emulsion, suspoemulsion, microemulsion, dry suspension, aqueous solution, wettable powder, soluble powder and granules, wherein the preferred dosage form is emulsion, suspoemulsion and microemulsion.
Example 1
The corn field herbicide containing the compound auxiliary comprises 55% of weeding component, 30% of first auxiliary and 15% of second auxiliary according to weight percentage, wherein the weeding component comprises mesotrione and pyrithiobac-sodium in a weight ratio of 2:1, the first auxiliary comprises 5 parts of surfactant, 5 parts of dispersant, 5 parts of cosolvent and 5 parts of thickener according to weight part, and the second auxiliary comprises 5 parts of coumarin, 10 parts of ethylparaben sodium salt, 5 parts of basil essential oil and 5 parts of artemisia dracuncula essential oil according to weight part.
Example 2
A corn field herbicide containing a compound auxiliary comprises 80% of a weeding component, 10% of a first auxiliary and 10% of a second auxiliary in percentage by weight, wherein the weeding component comprises mesotrione and pyrithiobac-sodium in a weight ratio of 4:1, the first auxiliary comprises 25 parts of a surfactant, 15 parts of a dispersant, 15 parts of a cosolvent and 15 parts of a thickening agent in parts by weight, and the second auxiliary comprises 20 parts of coumarin, 40 parts of ethylparaben sodium salt, 20 parts of basil essential oil and 20 parts of artemisia scoparia essential oil in parts by weight.
Example 3
A corn field herbicide containing a compound auxiliary agent comprises 65% of a weeding component, 25% of a first auxiliary agent and 10% of a second auxiliary agent according to weight percentage, wherein the weeding component comprises mesotrione and pyrithiobac-sodium in a weight ratio of 3:1, the first auxiliary agent comprises 15 parts of a surfactant, 10 parts of a dispersant, 10 parts of a cosolvent and 10 parts of a thickening agent according to weight portion, and the second auxiliary agent comprises 15 parts of coumarin, 25 parts of ethylparaben sodium salt, 15 parts of basil essential oil and 15 parts of artemisia scoparia essential oil according to weight portion.
Example 4
A corn field herbicide containing a compound auxiliary agent comprises 65% of a weeding component, 30% of a first auxiliary agent and 5% of a second auxiliary agent according to weight percentage, wherein the weeding component comprises mesotrione and pyrithiobac-sodium in a weight ratio of 3:1, the first auxiliary agent comprises 20 parts of a surfactant, 12 parts of a dispersant, 12 parts of a cosolvent and 10 parts of a thickening agent according to weight portion, and the second auxiliary agent comprises 12 parts of coumarin, 30 parts of ethylparaben sodium salt, 10 parts of basil essential oil and 12 parts of artemisia scoparia essential oil according to weight portion.
Example 5
The corn field herbicide containing the compound auxiliary comprises 55% of weeding component, 37% of first auxiliary and 8% of second auxiliary according to weight percentage, wherein the weeding component comprises mesotrione and pyrithiobac-sodium in a weight ratio of 4:1, the first auxiliary comprises 10 parts of surfactant, 7 parts of dispersant, 7 parts of cosolvent and 7 parts of thickener according to weight part, and the second auxiliary comprises 18 parts of coumarin, 35 parts of ethylparaben sodium salt, 18 parts of basil essential oil and 18 parts of artemisia argyi essential oil according to weight part.
The following experimental identification was carried out using the herbicide of example 3
Test I, combined herbicidal Effect test of mesotrione and pyrithiobac-sodium
Test materials: gramineous weeds and broad-leaved weeds, wherein the gramineous weeds are bluegrass and barnyard grass, and the broad-leaved weeds are piemarker and purslane.
The test method comprises the following steps: the cultivation of the experimental materials was carried out in a glass greenhouse: taking four weed seeds of bluegrass, cockspur grass, piemarker and purslane, taking 4 groups of plastic pots with the area of 0.4 square meter and the number of A, B, C, D, sowing 5 weed seeds in each group, sowing more than 80 weed seeds in each pot, sowing more than 20 weed seeds in each pot, simultaneously sowing 10 corn seeds, culturing for 15 days in the same soil, temperature and humidity, and then picking seedlings to ensure that the content of each weed is 20. Next, a herbicide solution was prepared in which group a was sprayed with the herbicide prepared in example 3, group B was sprayed with a herbicide containing no mesotrione as compared with the formulation of example 3, group C was sprayed with a herbicide containing no pyrithiobac-sodium as compared with the formulation of example 3, group D was a blank control group, and an equal amount of water was sprayed. The spraying process adopts sprayers with the same type, and the spraying pressure is respectively set to be 2L/m2The flow rate of the spray head is 100mL/min, and each group is sprayed for 2 times at an interval of more than 2 hours.
Weed control (%) was calculated as follows:
weed control (%) ═ a-b)/a × 100;
wherein, a: fresh weight of weeds treated by a blank control group; b: fresh weight of herbicide treated weeds;
after 5 days of spraying, the growth condition of the corn is observed to be normal growth, namely the herbicide of the invention is harmless to the corn, and then the weed control effect is calculated by weighing the fresh weight of the weeds in each group, and the results are shown in the following table 1:
table 1:
Figure BDA0002820495640000051
as can be seen from Table 1, the combined use of mesotrione and pyrithiobac-sodium has a more significant herbicidal effect than the single use of the herbicide.
The discrimination of the combined action of the herbicides adopts a Gowing method, which is a herbicide mixed combined action type evaluation method proposed in 1960. The method comprises the specific steps of firstly measuring the control effect of a single agent and a mixed agent on experimental weeds, calculating the theoretical control effect of the mixed agent through the actual measurement control effect of the single agent, and then comparing the theoretical control effect with the actual measurement control effect of the mixed agent to evaluate the combined action type. Let E be the theoretical weed control effect (%) of the mixture of herbicidal compounds, and X, Y be the weed control effect (%) of the compound alone, respectively. Then:
when two herbicide compounds are used in combination: e ═ X + Y-XY/100
When the actual measured control effect is greater than the expected theoretical control effect E, the synergistic effect is generated.
From table 3, it can be calculated that E ═ X + Y-XY/100 ═ 92.0+ 65.2-92.0X 65.2/100 ═ 97.2, i.e. the theoretical weed control effect of the herbicidal compound combination is 97.2%, while the actual weed control effect of the combined weeding of mesotrione and pyrithiobac-sodium of the present invention is 99.8%, and the actual control effect is obviously greater than the theoretical control effect, which indicates that the combined weeding of mesotrione and pyrithiobac-sodium of the present invention produces synergistic effect.
Experiment II, promoting the permeability of herbicide by the combined action of basil essential oil, artemisia dracunculus essential oil and ethylparaben sodium salt
Test materials: gramineous weeds and broad-leaved weeds, wherein the gramineous weeds are large crabgrass and green bristlegrass, and the broad-leaved weeds are spiny sedge and amaranthus retroflexus.
The test method comprises the following steps: the cultivation of the experimental materials was carried out in a glass greenhouse: taking four weed seeds of crab grass, green bristlegrass herb, cephalanoplos segetum and amaranthus retroflexus, taking 6 groups of plastic pots with the diameter of 30cm, numbering A, B, C, D, E, F, each group being 15, each group being divided into 5 groups, sowing more than 40 weed seeds in each plastic pot, more than 10 weeds, culturing for 15 days in the same soil, temperature and humidity, and then picking out the seedlings to ensure that the content of each weed is 10. Then, a herbicide solution was prepared, wherein group a was sprayed with the herbicide prepared in example 3, group B was sprayed with the herbicide containing no basil essential oil, no-artemisia selengensis essential oil and nipagin ethyl ester sodium salt compared to the formulation of example 3, group C was sprayed with the herbicide containing no basil essential oil compared to the formulation of example 3, group D was sprayed with the herbicide containing no-artemisia selengensis essential oil compared to the formulation of example 3, group E was sprayed with the herbicide containing no nipagin ethyl ester sodium salt compared to the formulation of example 3, group F was a blank control group, and the same amount of water was sprayed.
Each group is respectively numbered according to the time for measuring the fresh weight of the weeds after spraying, and the A group is numbered as AD1, AD2, AD3, AD4 and AD 5; group B numbers BD1, BD2, BD3, BD4, BD 5; group C numbers CD1, CD2, CD3, CD4, CD 5; group D numbers DD1, DD2, DD3, DD4 and DD 5; group E numbers ED1, ED2, ED3, ED4, ED 5; group F numbers FD1, FD2, FD3, FD4, FD 5.
The spraying process of each group adopts sprayers with the same type, and the spraying pressure is respectively set to be 2L/m2The flow rate of the spray head is 100mL/min, and each group is sprayed for 2 times at an interval of more than 2 hours.
After 1 day of spraying, average fresh weights of the AD1, BD1, CD1, DD1, ED1 and FD1 groups are respectively weighed, after 2 days of spraying, average fresh weights of the AD2, BD2, CD2, DD2, ED2 and FD2 groups are respectively weighed, after 3 days of spraying, average fresh weights of the AD3, BD3, CD3, DD3, ED3 and FD3 groups are respectively weighed, after 4 days of spraying, average fresh weights of the AD4, BD4, CD4, DD4, ED4 and FD4 groups are respectively weighed, after 5 days of spraying, average fresh weights of the AD5, BD5, CD5, DD5, ED5 and FD5 groups are respectively weighed, weighing is completed, registration is carried out, and then weed control effect is calculated.
Weed control (%) was calculated as follows:
weed control effect (%) - (a-b)/a x 100
Wherein, a: fresh weight of weeds treated by a blank control group; b: fresh weight of herbicide treated weeds;
the results are shown in table 2 below:
table 2:
group A AD1 AD2 AD3 AD4 AD5
Fresh weight of weed (g) 268.7 109.1 37.9 24.6 4.8
Weed control effect (%) 34.0 74.0 91.4 94.8 99.1
Group B BD1 BD2 BD3 BD4 BD5
Fresh weight of weed (g) 350.5 266.8 133.4 67.1 27.2
Weed control effect (%) 14.0 36.4 69.7 85.7 94.7
Group C CD1 CD2 CD3 CD4 CD5
Fresh weight of weed (g) 276.4 138.3 50.5 31.6 8.7
Weed control effect (%) 32.2 67.1 88.5 93.3 98.3
Group D DD1 DD2 DD3 DD4 DD5
Fresh weight of weed (g) 285.3 146.8 63.4 36.7 11.8
Weed control effect (%) 30.0 65.0 85.6 92.2 97.7
Group E ED1 ED2 ED3 ED4 ED5
Fresh weight of weed (g) 310.6 168.2 78.5 46.3 17.7
Weed control effect (%) 23.8 59.9 82.2 90.1 96.5
Group F FD1 FD2 FD3 FD4 FD5
Fresh weight of weed (g) 407.4 419.8 439.9 469.0 508.5
Weed control effect (%) 0 0 0 0 0
As can be seen from table 2, the herbicide added with basil essential oil, artemisia scoparia essential oil and ethylparaben sodium salt has higher herbicidal and control effects, the group a added with basil essential oil, artemisia scoparia essential oil and ethylparaben sodium salt has quick effect after herbicide spraying, the control effect reaches 91.4% in the third day, compared with other control groups, the herbicide and the herbicidal components with the same dosage have different herbicidal speeds, which indicates that the penetration effect of the herbicide added with the second auxiliary agent is better, namely the basil essential oil, the artemisia scoparia essential oil and the ethylparaben sodium salt act together, the penetration of the herbicide can be obviously promoted, and thus the obvious synergistic effect is achieved.
Third, the effect of ethylparaben on enhancing the dynamic surface tension of a surfactant is tested
Test tool: surface tension meter
Test subjects: the herbicide prepared by the formulation of example 3 was used as an experimental group, the herbicide to which no basil essential oil and artemisia scoparia essential oil and only ethylparaben were added compared to the experimental group was used as a control group 1, the herbicide to which no ethylparaben and only basil essential oil and artemisia scoparia essential oil were added compared to the experimental group was used as a control group 2, and the herbicide to which no basil essential oil, artemisia scoparia essential oil and ethylparaben were added compared to the experimental group was used as a blank control group.
The test method comprises the following steps: the test subjects were diluted 300 times and then subjected to surface tension measurement using a surface tension meter, and the results are shown in table 3:
table 3:
group of Experimental group Control group 1 Control group 2 Blank group
Surface tension (mN/m) 27.138 28.475 33.064 35.180
As can be seen from table 3, the surface tension of the herbicide added with basil essential oil, artemisia scoparia essential oil and ethylparaben is significantly reduced, and it can be seen from the control experiment that the surface tension without ethylparaben is higher than that of the herbicide added with ethylparaben, so that ethylparaben has a significant effect on enhancing the dynamic surface tension of the surfactant.
Experiment four, coumarin promotes the degradation of pyrithiobac-sodium in corn crops
The test method comprises the following steps: a, B two groups of corns are cultured in a glass greenhouse, each group comprises 5 pots, 20 plants are planted in each pot, wherein the herbicide of the formula of the invention in the embodiment 3 is sprayed on the group A, the herbicide which does not contain coumarin compared with the group A is sprayed on the group B, two corns are respectively extracted from 5 pots every 2 days from the spraying day of the herbicide, stem leaves with the same length are cut, 10 segments of stem leaves are simultaneously placed in a crushing stirrer, ethanol solution is added, the crushing, soaking and extraction are carried out, separation, concentration and purification are carried out, the content of pyrithiobac-sodium is measured by adopting a high performance liquid chromatograph after a sample is obtained, and the high performance liquid phase conditions are as follows:
a chromatographic column: c18,4.6mm × 250mm × 5 μm;
mobile phase A: acetonitrile;
mobile phase B: water;
volume ratio of mobile phase: a: b is 60: 40;
flow rate of mobile phase: 1 mL/min;
column temperature: 30 ℃;
detection wavelength: 232 nm.
Test results are compared statistically, as shown in table 4:
table 4:
time (sky) Group A concentration (μ g/mL) Group B concentration (μ g/mL)
2 0.37±0.018 0.36±0.054
4 0.46±0.052 0.49±0.038
6 0.31±0.068 0.40±0.029
8 0.15±0.028 0.31±0.057
10 0.04±0.009 0.20±0.016
12 0 0.09±0.003
14 0 0.02±0.002
As can be seen from Table 4, the concentration of pyrithiobac-sodium in the group A in corn decreases faster and finally becomes 0; the concentration of the pyrithiobac-sodium in the group B is reduced slowly, namely the pyrithiobac-sodium is degraded slowly in the corn, so that the spraying of the coumarin-containing herbicide can accelerate the degradation of the pyrithiobac-sodium in the corn and improve the safety of the herbicide.
The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes and modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention.

Claims (5)

1. The corn field herbicide containing the composite auxiliary agent is characterized in that: the weeding composition comprises, by weight, 50-80% of a weeding component, 10-40% of a first auxiliary agent and 3-15% of a second auxiliary agent, wherein the weeding component comprises 2-4:1 parts of mesotrione and pyrithiobac-sodium by weight, the first auxiliary agent comprises 5-25 parts of a surfactant, 5-15 parts of a dispersant, 5-15 parts of a cosolvent and 5-15 parts of a thickening agent, and the second auxiliary agent comprises 5-20 parts of coumarin, 10-40 parts of nipagin ethyl ester sodium salt, 5-20 parts of basil essential oil and 5-20 parts of artemisia scoparia essential oil by weight.
2. The corn field herbicide containing a compound adjuvant according to claim 1, wherein: the surfactant is one or the combination of any more of sodium dodecyl benzene sulfonate, calcium dodecyl benzene sulfonate, tristyrylphenol polyoxyethylene ether, octadecanol-based polyoxyethylene ether, dibenzyl biphenyl polyoxyethylene ether, styrol polyoxyethylene ether and fatty alcohol polyoxyethylene ether.
3. The corn field herbicide containing a compound adjuvant according to claim 1, wherein: the cosolvent is one or the combination of any more of methanol, ethanol, n-butanol, isobutanol, propylene glycol, ethylene glycol or glycerol.
4. The corn field herbicide containing a compound adjuvant according to claim 1, wherein: the dispersing agent is one or the combination of any more of sodium lignosulfonate, sodium methylene dinaphthalene sulfonate, calcium lignosulfonate, sodium polyacrylate and methylene dinaphthalene sulfonate formaldehyde condensate.
5. The corn field herbicide containing a compound adjuvant according to claim 1, wherein: the thickener is one of xanthan gum, polyvinyl alcohol, sodium alginate and starch.
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Citations (1)

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Publication number Priority date Publication date Assignee Title
CN103503872A (en) * 2013-09-26 2014-01-15 江志鑫 Novel rice field weeding composition

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EP2269462B1 (en) * 2008-03-25 2014-12-24 SDS Biotech K. K. Herbicide composition and weed control method

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Publication number Priority date Publication date Assignee Title
CN103503872A (en) * 2013-09-26 2014-01-15 江志鑫 Novel rice field weeding composition

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Title
"25%硝磺草酮悬浮剂防除夏玉米田杂草田间试验";鞠国栋等;《陕西农业科学》;20190425;第30-31、37页 *

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