CN107751226B - Herbicide composition containing pyridate and flufenacet - Google Patents
Herbicide composition containing pyridate and flufenacet Download PDFInfo
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- CN107751226B CN107751226B CN201711201337.9A CN201711201337A CN107751226B CN 107751226 B CN107751226 B CN 107751226B CN 201711201337 A CN201711201337 A CN 201711201337A CN 107751226 B CN107751226 B CN 107751226B
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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
- A01N47/02—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 no bond to a nitrogen atom
- A01N47/06—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 no bond to a nitrogen atom containing —O—CO—O— groups; 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
- 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
- A01N43/82—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 three ring hetero atoms
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Abstract
The invention relates to a herbicide composition, wherein the mass ratio of active ingredients of pyridate to flufenacet is 15:1-1:15, and toxicity determination experiments prove that the herbicide composition has a good synergistic effect when the mass ratio of the pyridate to the flufenacet is 1:3-1: 15. The herbicide composition can be prepared into pesticide formulations such as missible oil, suspending agent, wettable powder, water dispersible granules, emulsion in water, microemulsion, granules and microcapsules. The total mass of the pyridate and the flufenacet in the preparation accounts for 5-70% of the mass of the whole preparation, wherein 15-65% of the total mass of the pyridate and the flufenacet achieves better balance of toxicity and residue, and the cost is lower.
Description
Technical Field
The invention relates to the technical field of pesticide compounding, in particular to a weeding composition containing pyridate and flufenacet.
Background
Flufenacet (Flufenacet) is developed by bayer crop science, has a chemical name of 4-fluoro-N-isopropyl-N-2- (5-trifluoromethyl-1, 3, 4-thiadiazole-2-oxy) acetanilide, belongs to an aromatic acetamide compound, and has a structural formula as follows:
flufenacet and chloroacetamide herbicides have similar weed control spectrum, the action mechanism is mainly to inhibit cell division to reduce the synthesis of nutrient substances of weeds, and the flufenacet and the chloroacetamide herbicides are suitable for preventing and killing weeds in corn, soybean, cotton, wheat and other crops.
Pyridate (Pyridat) has the chemical name 6-chloro-3-phenylpyridazin-4-yl-S-octylthiocarbonate and the formula:
the pyridate is a selective post-emergence herbicide, is quickly absorbed by leaves after stem and leaf treatment, and prevents the Hill reaction of weed photosynthesis, so that the leaves of the weed turn yellow and stop growing, and wither and die. The herbicide is suitable for cereal crops such as wheat, rice, corn and the like, can also be used for fields of rape, peanut, vegetable and the like, and is mainly used for preventing and removing broadleaf weeds.
Flufenacet has a good preventing and removing effect on perennial grassy weeds, has a certain inhibiting effect on partial broadleaf weeds of Amaranthus retroflexus and Commelina communis, but has a poor preventing effect on other broadleaf weeds such as purslane, celosia argentea, eclipta, speedwell, cleavers, Abutilon theophrasti, acalypha australis and the like, and also has a poor effect on some malignant weeds such as ryegrass, wild oats and the like. Flufenacet can be compounded with herbicides such as metribuzin, metosulam and diflufenican for preventing and removing broadleaf weeds, so that the weed control spectrum is expanded.
Disclosure of Invention
Technical problem
Herbicide compounding or compounding is one of the most effective methods to solve the above problems. The reasonable compounding or mixing of the chemical herbicide has the positive characteristics of expanding the weeding spectrum, improving the control effect, prolonging the application suitable period, reducing the dosage, reducing the phytotoxicity, reducing the residue, delaying the occurrence and the development of the drug resistance and the like. The invention screens out the compound of the pyridate and the flufenacet on the basis of indoor screening and field tests, and has obvious synergistic effect. No report is made on a pyridate and flufenacet compounded weeding composition and application.
Technical scheme
The invention provides a weeding composition, wherein the mass ratio of active ingredients of the pyridate to flufenacet in the weeding composition is 15:1-1:15, and toxicity determination experiments prove that the weeding composition has a good synergistic effect when the mass ratio of the pyridate to the flufenacet is 1:3-1: 15.
The herbicide composition can be prepared into pesticide formulations such as missible oil, suspending agent, wettable powder, water dispersible granules, emulsion in water, microemulsion, granules and microcapsules. The total mass of the pyridate and the flufenacet in the preparation accounts for 5-70% of the mass of the whole preparation, wherein 15-65% of the total mass of the pyridate and the flufenacet achieves better balance of toxicity and residue, and the cost is lower.
The specific implementation scheme of the pesticide formulation prepared from the weeding composition is as follows:
the weeding composition is an emulsifiable concentrate preparation, and comprises the following components in percentage by mass: 1-50% of pyridate; 1-50% of flufenacet; 10-30% of conventional emulsifier; 20-50% of a conventional solvent; 1-5% of conventional synergist. The preparation method comprises the specific production steps of firstly adding the active ingredients of the pyridate and the flufenacet into a solvent for complete dissolution, then adding the emulsifier and the synergist into the solvent, uniformly stirring the mixture to form uniform and transparent oily liquid, and filling the oily liquid to obtain the emulsifiable concentrate preparation of the composition.
The weeding composition is a suspending agent and comprises the following components in percentage by mass: 1-50% of pyridate; 1-50% of flufenacet; 5-20% of a dispersant; 1-5% of an antifreezing agent; 0.1 to 2 percent of thickening agent; 0.1 to 0.8 percent of defoaming agent; 0-10% of penetration enhancer; 0.1 to 5 percent of pH value regulator; water and the balance. The suspending agent is prepared by the specific production steps of firstly mixing other auxiliary agents, uniformly mixing the auxiliary agents through high-speed shearing, adding the effective pyridate and the flufenacet, and grinding the mixture in a ball mill for 2 to 3 hours to ensure that the particle diameters are below 5 mm.
The weeding composition is wettable powder and comprises the following components in percentage by mass: 1-50% of pyridate; 1-50% of flufenacet; 3-10% of a dispersant; 1-5% of a wetting agent; filler and the balance. The wettable powder has the specific production steps as follows: according to the formula, the active ingredient pyridate is mixed with flufenacet, the dispersing agent, the wetting agent and the filler, the obtained mixture is uniformly stirred in a stirring kettle, and the obtained mixture is uniformly mixed through an air flow pulverizer to obtain the wettable powder of the composition.
The weeding composition is a water dispersible granule, and comprises the following components in percentage by mass: 1-50% of pyridate; 1-50% of flufenacet; 3-10% of a dispersant; 1-10% of a wetting agent; 1-5% of a disintegrating agent; and the balance of the filler. The water dispersible granule comprises the following specific production steps: according to the formula, the active ingredient pyridate, the flufenacet, the dispersing agent, the wetting agent, the disintegrating agent and the filler are uniformly mixed, crushed by an ultramicro jet mill, kneaded, added into a fluidized bed granulation dryer for granulation, drying and screening, and then sampled and analyzed to prepare the water dispersible granule of the composition.
The weeding composition is an aqueous emulsion, and comprises the following components in percentage by mass: 1-50% of pyridate; 1-50% of flufenacet; 3-30% of emulsifier; 5-15% of a solvent; 2-15% of a stabilizer; 1-5% of an antifreezing agent; 0.1 to 8 percent of defoaming agent; 0.2 to 2 percent of thickening agent; water and the balance. The specific production steps of the aqueous emulsion are as follows: firstly, adding the pyridate, the flufenacet, the solvent, the emulsifier and the cosolvent together to dissolve the pyridate into a uniform oil phase; mixing part of water, antifreeze agent, antimicrobial agent and other pesticide auxiliary agents together to form a uniform water phase; adding the oil phase into the water phase while stirring at a high speed in a reaction kettle, slowly adding water until a phase inversion point is reached, starting a shearing machine to carry out high-speed shearing, adding the rest water, and shearing for about half an hour to form an oil-in-water emulsion, thus preparing the composition in the form of the emulsion in water.
The weeding composition is a microemulsion, and comprises the following components in percentage by mass: 1-50% of pyridate; 1-50% of flufenacet; 10-30% of emulsifier, 1-8% of antifreezing agent, 0.5-10% of stabilizing agent and 20-50% of conventional solvent cosolvent. Dissolving pyridate and flufenacet completely with cosolvent, adding emulsifier, antifreeze stabilizer, etc., mixing, adding water, and stirring to obtain microemulsion.
The weeding composition is a granule, and comprises the following components in percentage by mass: 1-50% of pyridate; 1-50% of flufenacet; 1-10% of wetting dispersant; 0.1 to 5 percent of thickening agent; 0.1 to 5 percent of defoaming agent; castor oil, and the balance is up. Mixing the active ingredient pyridate with flufenacet, a dispersing agent, a stabilizing agent, a defoaming agent, a solvent and the like according to the proportion of the formula, grinding the mixture in a sanding kettle, and sending the ground mixture into a homogenizing mixer to be uniformly mixed to obtain a finished product.
The weeding composition is a microcapsule, and comprises the following components in percentage by mass: 1-50% of pyridate; 1-50% of flufenacet; 5-20% of urea; 5-20% of formaldehyde; 5-20% of emulsifying dispersant; 1-5% of an antifreezing agent; 0.1 to 2 percent of thickening agent; 0.1 to 0.8 percent of defoaming agent; water and the balance. Adding urea and formaldehyde (the mass ratio of substances is about l: 1.5-2.0) into a three-neck flask with a stirring device, adjusting the pH value of the solution to about 8-9 by using a sodium hydroxide solution, and then heating to 70-80 ℃ for reaction to obtain the stable urea-formaldehyde resin prepolymer. Dissolving a certain amount of pyridate and flufenacet in cyclohexane, adding an emulsifying dispersant into the solution, and stirring vigorously to prepare the O/W type stable emulsion taking the aqueous solution containing the emulsifying dispersant as a water phase. The urea-formaldehyde resin prepolymer is added into the emulsion, the pH value is adjusted, and polymerization reaction is carried out under the acid catalysis condition, so that oil phase substances are wrapped to form microcapsule particles. Slowly heating and curing, wherein the temperature is controlled to be 40-50 ℃, and the curing time is 1 h. And (3) adding a proper amount of auxiliary agent to obtain the stable microcapsule suspending agent.
The emulsifier is selected from one or a mixture of more than one of calcium dodecyl benzene sulfonate and fatty acid polyoxyethylene ether, alkylphenol polyoxyethylene sulfosuccinate, styryl phenol polyoxyethylene ether, nonylphenol polyoxyethylene ether, castor oil polyoxyethylene ether, fatty acid polyoxyethylene ester and polyoxyethylene fatty alcohol ether in any ratio.
The solvent is one or a mixture of more than one of xylene or biodiesel, toluene, diesel oil, methanol, ethanol, n-butanol, isopropanol, rosin-based vegetable oil with the code number of ND-45, solvent oil, dimethylformamide, dimethyl sulfoxide, water and the like.
The dispersing agent is selected from one or more of alkylphenol polyoxyethylene ether methyl ether condensate sulfate, alkyl sulfonate calcium salt, naphthalene sulfonic acid formaldehyde condensate sodium salt, alkylphenol polyoxyethylene, fatty acid polyoxyethylene ester, fatty amine polyoxyethylene ether and glycerin fatty acid ester polyoxyethylene ether.
The humectant is selected from one or more of sodium dodecyl sulfate, calcium dodecyl benzene sulfonate, nekal BX, wetting penetrant F, alkylbenzene sulfonate polyoxyethylene triphenylene phenyl phosphate, fructus Gleditsiae Abnormalis powder, faeces Bombycis, and fructus Sapindi Mukouossi powder.
The disintegrating agent is one or more selected from bentonite, urea, ammonium sulfate, aluminum chloride, citric acid, succinic acid and sodium bicarbonate.
The thickening agent is selected from one or more of xanthan gum, carboxymethyl cellulose, carboxyethyl cellulose, methyl cellulose, magnesium aluminum silicate and polyvinyl alcohol.
The stabilizer is selected from one of sodium citrate and resorcinol.
The antifreezing agent is one or more selected from ethylene glycol, propylene glycol and glycerol.
The defoaming agent is selected from one or more of silicone oil, silicone compounds, C10-20 saturated fatty acid compounds and C8-10 fatty alcohol.
The filler is selected from one or more of kaolin, diatomite, bentonite, attapulgite, white carbon black, starch and light calcium carbonate.
The herbicidal composition of the present invention can be applied to the locus or the foliage or stems of weeds. The weeds include grassy weeds, broad-leaved weeds, cyperaceae weeds and the like, such as ryegrass, wild oats, speedwell, cleavers, shepherd's purse, sedum, cyperus rotundus, acalypha australis, amaranthus spinosus and amaranthus, purpleflower, thalictrum, purslane and the like.
The herbicidal compositions of the present invention are applicable to a variety of useful crop plants, seeds, or other reproductive parts, including corn, rice, wheat, turf, sugarcane, canola, peanut, and vegetables.
The herbicidal composition of the present invention can be applied by a method selected depending on the formulation characteristics, the intended subject and the prevailing circumstances, such as spraying, dusting, scattering, etc.
The synergistically effective amounts of the compositions suitable for use in the present invention may vary depending on the prevailing conditions such as weed pressure, time of application, mode of application, weather, soil conditions, topographical features, the type of target crop, and the like. In practice, the application rate of the active ingredient may be 10-50 g/acre, preferably 15-30 g/acre.
Advantageous effects
The compound herbicide taking the active ingredients as the pyridate and the flufenacet has obvious synergistic effect, delays the generation of the drug resistance of the key factors, reduces the production cost and the use cost, and is effective to various gramineous weeds and broadleaf weeds of rice and common wheat.
Detailed Description
Hereinafter, the present invention will be described in detail. The following description is made to illustrate the present invention and, therefore, even when it includes a restrictive expression, these should not be construed as limiting the scope of the present invention defined by the appended claims. The effect experiment of the invention adopts a mode of combining indoor bioassay and field experiment, and if no special description is given, the following proportions are all mass percent.
Example (b): and performing combined toxicity experiments on the pyridate and the flufenacet in different proportions.
Reagent to be tested: bulk drug of commercial pyridate and bulk drug of flufenacet
Target weeds: lolium perenne
The experimental method comprises the following steps: adopting a potted stem and leaf treatment method (NY/T1155.4-2006): the method comprises the steps of filling quantitative soil in a plastic pot with the volume of 6 cm and the diameter of 9 cm, sowing 15-20 weed seeds to be tested in the plastic pot, covering with fine soil with the thickness of 0.5-1 cm, culturing in a greenhouse, carrying out stem leaf spraying treatment when weeds grow to 2-4 leaf periods, spraying 1mL of liquid in each pot, repeating the treatment for 4 times, and setting the treatment without a medicament as a contrast. After treatment, the weeds are cultured in a greenhouse, the growth condition of the target weeds is observed regularly, the damage symptoms and the growth inhibition condition of the target weeds are observed visually after 15 days, the fresh weight of the overground part or the fresh weight of the plant is weighed, and the toxicity of the medicament on the target weeds is evaluated according to the fresh weight inhibition rate of the report.
Investigation time: after 15 days of test treatment, the target damage symptoms and growth inhibition are visually observed, and the fresh weight of the overground part is called.
Data statistics and analysis: the fresh weight inhibition (%) was calculated from the survey statistics.
Fresh weight inhibition ratio P (%) ═ control fresh weight-treated fresh weight)/treated fresh weight × 100%.
The combined action evaluation method comprises the following steps:
the mode of action of the herbicide combinations was evaluated according to the Gowing method (NY/T1155.7-2006), which is formulated as follows:
E0＝X+Y-XY/100
x is the fresh weight inhibition rate of the pyridate to the target weeds when the pyridate is used singly in a certain dosage;
y is the fresh weight inhibition rate of flufenacet to the target weeds when a certain dosage is used singly;
E0the theoretical value of the inhibition rate of the fresh weight of the target weeds when the two medicaments of the pyridate and the flufenacet are mixed;
e is the measured value of the fresh weight inhibition rate of the target weeds when the two medicaments of the pyridate and the flufenacet are mixed.
Evaluation criteria: when E-E0The synergistic effect is expressed when the concentration is more than 10 percent, and when the concentration is less than-10 percent and less than E-E0Expressed as additive effect when < 10%, when E-E0When < -10%, antagonism is indicated. The results obtained are shown in table 1 below.
Table 1: mixed toxicity determination result of pyridate and flufenacet
Toxicity test examples show that the pyridate and the flufenacet which are effective components have a certain synergistic effect when used according to the ratio of 15:1-1:15, the synergistic effect is higher when the ratio is 1:3-1:15, and the synergistic effect is most obvious when the ratio is 1: 15.
Detailed description of the preferred embodiments
A better understanding of the present invention may be obtained through the following examples which are set forth to illustrate, but are not to be construed to limit the scope of the present invention. The scope of the present invention is given by the appended claims, and all modifications within the meaning and scope equivalent to the claims are also included. The "%" representing amounts in the following examples and comparative examples are given on a weight basis, unless otherwise specified.
Formulation example 1
The 36 percent pyridate flufenacet missible oil preparation comprises the following components: pyridate 6 percent; 30% of flufenacet; 16% of nonylphenol polyoxyethylene ether as an emulsifier; 5% of a synergist; the solvent xylene makes up 100%. The effective components of the pyridate and the flufenacet are added into dimethylbenzene to be completely dissolved, then the nonylphenol polyoxyethylene ether and the synergist are added and stirred uniformly to form uniform and transparent oily liquid, and the filling is carried out.
Formulation example 2
The 30% pyridate flufenacet suspending agent comprises the following components: 5% of pyridate; 25% of flufenacet; 10% of dispersing agent naphthalene sulfonic acid formaldehyde condensate sodium salt; 8% of antifreeze propylene glycol; 2% of thickening agent xanthan gum; 0.5 percent of defoaming agent silicone oil; water and the balance. Mixing other adjuvants, shearing at high speed, mixing, adding pyridate and flufenacet, and grinding in a ball mill for 2-3 hr to obtain suspension with particle diameter below 5 mm.
Formulation example 3
The 48 percent pyridate flufenacet wettable powder comprises the following components: 3% of pyridate; 45% of flufenacet; 15% of dispersant alkylphenol polyoxyethylene ether methyl ether condensation compound sulfate; wetting agent calcium dodecyl benzene sulfonate 5%; kaolin as filler and the rest. According to the formula, the active ingredient pyridate is mixed with flufenacet, the dispersing agent, the wetting agent and the filler, the obtained mixture is uniformly stirred in a stirring kettle, and the obtained mixture is uniformly mixed through an air flow pulverizer to prepare the wettable powder.
Formulation example 4
The 65% pyridate flufenacet water dispersible granule comprises the following components: 5% of pyridate; 60% of flufenacet; 6% of alkylphenol polyoxyethylene ether methyl ether condensation compound sulfate; wetting agent calcium dodecyl benzene sulfonate 5%; 10% of disintegrant bentonite; the rest is filler kaolin. According to the formula, the active ingredient pyridate, the flufenacet, the dispersing agent, the wetting agent, the disintegrating agent and the filler are uniformly mixed, crushed by an ultramicro jet mill, kneaded, added into a fluidized bed granulation dryer for granulation, drying and screening, and then sampled and analyzed to prepare the water dispersible granule of the composition.
Formulation example 5
The 18% pyridate flufenacet microemulsion comprises the following components: 3% of pyridate; 15% of flufenacet; 24% of emulsifier polyoxyethylene fatty alcohol ether, 6% of antifreeze propylene glycol, 6% of stabilizer resorcinol, and the balance of solvent dimethylformamide. The pyridate and the flufenacet are completely dissolved by a solvent, then other components such as an emulsifier, an antifreeze stabilizer and the like are added, the materials are uniformly mixed, finally, water is added, and the microemulsion can be prepared after full stirring.
Experiment in the field
A48% pyridate flufenacet wettable powder (formulation example 1) was tested for weeds in wheat fields. The main weeds in the field comprise ryegrass, wild oat, cleavers, speedwell and the like, and the leaf age of the weeds is 2-4 leaf period. The conventional spraying method is adopted.
Table 2: data of field control
-represents inactive
From the field control data, the pyridate has no activity on monocotyledonous weeds, but after being compounded with the flufenacet, the compound has the effect of improving the control effect of the flufenacet on monocotyledonous weeds such as ryegrass and wild oats; moreover, the single dose of pyridate and flufenacet has poor effect on dicotyledonous weeds such as veronica officinalis, cleavers and the like, but the compound has excellent control effect which exceeds the control effect of single dose addition, and shows synergistic effect. Therefore, the composition solves the problem that a single agent cannot effectively control a plurality of weeds simultaneously, the control effect is obviously improved, and the control effect 15 days after the composition is applied is more than 80 percent.
Claims (3)
1. A herbicide preparation is characterized by comprising the following components in percentage by weight: 3% of pyridate; 45% of flufenacet; 15% of dispersant alkylphenol polyoxyethylene ether methyl ether condensation compound sulfate; wetting agent calcium dodecyl benzene sulfonate 5%; kaolin is used as a filler, and the balance is the wettable powder.
2. A method of controlling weeds in crops of plants, characterized in that an effective amount of the herbicide formulation of claim 1 is contacted with the weeds in the field.
3. A method of controlling crop weeds as claimed in claim 2, characterised in that said effective amount means an active ingredient dosage of 10 g/acre or 20 g/acre.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4223465A1 (en) * | 1992-07-16 | 1994-01-20 | Bayer Ag | Herbicidal agents based on heteroaryloxyacetamides |
| US5858920A (en) * | 1994-12-23 | 1999-01-12 | Bayer Aktiengesellschaft | Selective herbicides based on heteroaryloxy-acetamides E.G., fluthiamide |
| CN1430471A (en) * | 2000-05-22 | 2003-07-16 | 拜尔农作物科学股份公司 | Selective heteroaryloxy-acetamide-based herbicides |
-
2017
- 2017-11-27 CN CN201711201337.9A patent/CN107751226B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4223465A1 (en) * | 1992-07-16 | 1994-01-20 | Bayer Ag | Herbicidal agents based on heteroaryloxyacetamides |
| US5858920A (en) * | 1994-12-23 | 1999-01-12 | Bayer Aktiengesellschaft | Selective herbicides based on heteroaryloxy-acetamides E.G., fluthiamide |
| CN1430471A (en) * | 2000-05-22 | 2003-07-16 | 拜尔农作物科学股份公司 | Selective heteroaryloxy-acetamide-based herbicides |
Non-Patent Citations (2)
| Title |
|---|
| 氟噻草胺对小麦田杂草防除效果评价;白霜等;《第十三届全国杂草科学大会论文摘要集》;20170807;第76页 * |
| 除草剂对小麦田雀麦的生物活性测定;赵祖英等;《植物保护学报》;20171015;第44卷(第5期);第841-848页 * |
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