CN103548891B - A kind of botanical pesticide and application thereof preventing and treating cigarette aphid - Google Patents
A kind of botanical pesticide and application thereof preventing and treating cigarette aphid Download PDFInfo
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The invention discloses a kind of botanical pesticide and the application thereof that prevent and treat cigarette aphid; The composition that this botanical pesticide is made up of hair oil of bay, elsholtzia splendens oil and gray wool oil of negundo chastetree, allocates emulsifiable concentrate, microemulsion or aqueous emulsion that auxiliary agent is mixed with into; This botanical pesticide has significant control efficiency to cigarette aphid, and noresidue on tobacco leaf, improve quality of tobacco, to natural enemy and the person poultry safety of environment, insect, practicality is very strong.
Description
Technical field
The invention discloses a kind of botanical pesticide and the application thereof that prevent and treat cigarette aphid, belong to botanical pesticide technical field.
Background technology
Cigarette aphid (MyzuspersicaeSulzer), be one of primary pest affecting tobacco growing growth, its breeding is fast, quantity is large, all can occur in each breeding time of tobacco.Cigarette aphid is divided into causing harm of growing of tobacco growing and directly causes harm and indirectly cause harm, directly cause harm and refer to that cigarette aphid utilizes its sucking mouth parts to suck the juice of young tender tobacco leaf, secrete honeydew simultaneously and pollute tobacco leaf, bring out tobacco and produce dark mildew, make tobacco leaf surface blackening, quality declines; Indirectly cause harm and refer to and propagate the multiple tobacco virus diseases such as tobacco nematode (CMV), etch virus of tobacco viral disease (TEV), marmor upsilon disease (PVY) after cigarette aphid takes food tobacco leaf thereupon, to tobacco grow and the quality of tobacco leaf causes more serious loss.
For a long time, in tobacco planting work, employing chemical agent always is to the chemical control of cigarette aphid, as Imidacloprid, Aphox, Acephate, Acetamiprid, Methomyl etc.Although Agro-chemicals control instant effect, effective, but there is " 3R " problem in chemical agent, the i.e. problem of residue of pesticide (Residue), insect rampant (Resurgence), pest resistance (Resistance) once again, the chemical pesticide that only China uses in land for growing field crops every year in tobacco planting work at present reaches 4,500,000 ~ 8,000,000 kilogram, pest resistance to insecticide constantly strengthens, environmental pollution is day by day serious, agricultural chemical residue in tobacco amount constantly increases to use chemical pesticide to cause for a long time in a large number, has caused a series of problem.Along with tobacco leaf and tobacco product country between trade increasingly increase, the persticide residue of tobacco leaf and tobacco product is the important content that various countries pay close attention in tobacco product trade, become international market tobacco leaf evaluation and chosen the key factor of middle consideration, in the international tobacco trade of Ye Shi, carry out the important content of commodity inspection.And containing the multiple secondary metabolites with insecticidal activity in plant, the botanical pesticide utilizing these secondary metabolites to prepare has efficiently, specially effect, low toxicity (or nontoxic), easy degraded, noresidue, insect such as not easily to develop immunity to drugs at the advantage, therefore the botanical pesticide of exploitation control cigarette aphid is conducive to the residue of pesticide reducing tobacco leaf, be conducive to the international competitiveness improving tobacco leaf and tobacco product, be conducive to the sustainable development of leaf tobacco production.
Hair oil of bay is obtained through steam distillation by the leaf of Lauraceae (Lauraceae) vegetable hair osmanthus (CinnamomumappelianumSchewe), and it contains the compound that Cineole, amphene, australene, linalool, terpinene-4-alcohol etc. have remarkable insecticidal activity.Elsholtzia splendens oil is obtained through steam distillation by the herb of Labiatae (Labiatae) plant elsholtzia splendens (ElsholtziasplendensNakaiexF.Maekawa), in its chemical composition containing the carvacrol of the remarkable insecticidal activity of large measurer, Thymol, to P-cymene, terpinene, β-phellandrene, β-caryophyllene, citrene, linalool etc.Gray wool oil of negundo chastetree is obtained through steam distillation by the leaf of Verenaceae (Verbenaceae) plant gray wool Vitex negundo var cannabifolia (VitexcanescensKurz), it is also containing the multiple chemical composition with remarkable insecticidal activity, as australene, Cineole, citrene, terpineol, eucalyptol, eugenol etc.Have no the agricultural chemicals adopting separately above-mentioned hair oil of bay, elsholtzia splendens oil or gray wool oil of negundo chastetree to prepare so far, also have no the agricultural chemicals adopting hair oil of bay, elsholtzia splendens oil and the composite preparation of gray wool oil of negundo chastetree.
Summary of the invention
The present invention is directed to chemical pesticide control cigarette aphid of the prior art exist easily make cigarette aphid develop immunity to drugs, easily contaminated environment, problem that agricultural chemical residue in tobacco amount is large, object is to provide one can effectively prevent and treat cigarette aphid, and making the botanical pesticide that cigarette aphid not easily develops immunity to drugs, botanical pesticide is to tobacco-growing soil and environmental nonpollution, noresidue on tobacco leaf.
Another object of the present invention is the application being to provide a kind of botanical pesticide, the composition be made up of hair oil of bay, elsholtzia splendens oil, gray wool oil of negundo chastetree is made botanical pesticide emulsifiable concentrate, microemulsion or aqueous emulsion and can effectively be prevented and treated cigarette aphid, and to tobacco-growing soil and environmental nonpollution.
The invention provides a kind of botanical pesticide preventing and treating cigarette aphid, the composition that this botanical pesticide is made up of hair oil of bay, elsholtzia splendens oil and gray wool oil of negundo chastetree, allocate emulsifiable concentrate, microemulsion or aqueous emulsion that auxiliary agent is made into; In described composition, the mass percentage content of each component is: hair oil of bay 30 ~ 65%, elsholtzia splendens oil 20 ~ 45%, gray wool oil of negundo chastetree 15 ~ 35%.
Described emulsifiable concentrate comprises following mass percent component: composition 20 ~ 70%, emulsifier 5 ~ 20%, synergist 5 ~ 20%, bleeding agent 10 ~ 40%.
Described microemulsion comprises following mass percent component: composition 10 ~ 60%, surfactant 7 ~ 25%, synergist 3 ~ 15%, antifreezing agent 5 ~ 10%, deionized water 10 ~ 60%.
Described aqueous emulsion comprises following mass percent component: composition 10 ~ 60%, surfactant 5 ~ 20%, synergist 1 ~ 15%, antifreezing agent 5 ~ 10%, thickener 0.4 ~ 1%, deionized water 10 ~ 70%.
Described synergist is one or more in Octacide 264, organosilicon, azone, alkyl carbonate, chlorinated aliphatic.
Described emulsifier is one or more in alkyl benzene sulfonate, phenethyl phenol polyethenoxy ethers, phenethyl phenol polyethenoxy polyoxypropylene ethers, alkylphenol polyoxyethylene class, tween.
Described surfactant is one or more in alkylphenol polyoxyethylene class, alkyl benzene sulfonate, phenethyl phenol polyethenoxy ether polyoxypropylene ethers, phenethyl phenol polyethenoxy ethers, NaLS, sodium alkyl sulfate, tween.
Described antifreezing agent is one or more in ethylene glycol, propane diols, glycerine.
Described bleeding agent is one or more in azone, organic diesel oil, epoxidized soybean oil, tung oil.
Described thickener is one or more in xanthans, gum Arabic, Magnesiumaluminumsilicate, sodium carboxymethylcellulose.
Present invention also offers a kind of application of botanical pesticide, this botanical pesticide is allocated by hair oil of bay, elsholtzia splendens oil and the composition that form of gray wool oil of negundo chastetree botanical pesticide emulsifiable concentrate, microemulsion or aqueous emulsion that auxiliary agent makes into and is applied to and prevents and treats cigarette aphid.
In described composition, the mass percentage content of each component is: hair oil of bay 30 ~ 65%, elsholtzia splendens oil 20 ~ 45%, gray wool oil of negundo chastetree 15 ~ 35%.
Described hair oil of bay, elsholtzia splendens oil and gray wool oil of negundo chastetree are extracted respectively by steam distillation to obtain from hair osmanthus (CinnamomumappelianumSchewe) leaf, elsholtzia splendens (ElsholtziasplendensNakaiexF.Maekawa) herb and gray wool Vitex negundo var cannabifolia (VitexcanescensKurz) leaf.
In described emulsifiable concentrate, the mass percentage content of composition is 20 ~ 70%.
In described microemulsion, the mass percentage content of composition is 10 ~ 60%.
In described aqueous emulsion, the mass percentage content of composition is 10 ~ 60%.
Described emulsifiable concentrate also comprises the organic solvent that mass fraction is not more than 20%.
Described microemulsion also comprises the organic solvent that mass fraction is not more than 15%.
Described aqueous emulsion also comprises the organic solvent that mass fraction is not more than 15%.
Described organic solvent is one or more in ethyl acetate, ethanol, methyl oleate, acetone, cyclohexanone.
Described emulsifiable concentrate prepares by the following method: by hair oil of bay, elsholtzia splendens oil, the mixing of gray wool oil of negundo chastetree, emulsifier, organic solvent, bleeding agent, synergist, in modulation kettle, mixture is stirred, and sampling detects the stability of preparation and outward appearance, qualified rear packaging, gets product.
Described microemulsion prepares by the following method: by hair oil of bay, elsholtzia splendens oil, the mixing of gray wool oil of negundo chastetree, organic solvent, surfactant, synergist, antifreezing agent and water, in modulation kettle, mixture is stirred, until transparent, and sampling detects the stability of preparation and outward appearance, qualified rear packaging, gets product.
Described aqueous emulsion prepares by the following method: by hair oil of bay, elsholtzia splendens oil, the mixing of gray wool oil of negundo chastetree, organic solvent, surfactant, synergist, antifreezing agent, thickener and water, in the emulsified dispersion of the effect of high-speed shearing emulsion machine, and sampling detects the stability of preparation and outward appearance, qualified rear packaging, gets product.
Beneficial effect of the present invention: the present invention is through the repetition test of inventor, find by hair oil of bay, elsholtzia splendens oil and gray wool oil of negundo chastetree according to a certain percentage the composite composition obtained have significant synergies, to aphid, there is good control efficiency, be specially adapted to the control to cigarette aphid.Polytype active insecticidal components is there is separately in three vegetable oil that the present invention selects, after three vegetable oil are composite, between three kinds of oily active components, there is significant Synergistic insecticidal effect, to cigarette aphid, there is significant toxic action, and not easily make cigarette aphid develop immunity to drugs, and to the natural enemy of cigarette aphid, other is biological and person poultry safety is nontoxic; Meanwhile, these vegetable oil are easily degraded, and to vega soil and environmental nonpollution, noresidue on tobacco leaf, is conducive to the quality improving tobacco leaf; These vegetable oil source are wide, greatly reduce the cost of agricultural chemicals.In addition, the auxiliary agent of employing is all environment-friend auxiliaries, reduces the destruction to environment and the murder by poisoning degree to operator, and preparation method is simple, is easy to implement.
Embodiment
The present invention is described further for following examples, instead of limit the scope of the invention.
Embodiment 1
Hair oil of bay, elsholtzia splendens oil and the composite indoor joint toxicity measuring to cigarette aphid of gray wool oil of negundo chastetree
Materials and methods: test material is the tobacco leaf with cigarette aphid, test method is leaching worm leaf dipping method.3 repetitions are all established in all process, and establish control treatment.Concrete steps are as follows, and the first step measures LC
50value: first above-mentioned three kinds of oil and composite mixture thereof are used a small amount of acetone solution respectively, be then made into mother liquor respectively with water, then mother liquor is diluted to the dilution of 6 variable concentrations with water; The cigarette aphid of prior select is put into different diluent together with tobacco leaf and floods 5s, after taking-up cigarette aphid and tobacco leaf blotting paper blot unnecessary liquid, together put into the culture dish being covered with filter paper having carried out moisturizing process, make that there are in each culture dish 40 ~ 50 cigarette aphids; Cigarette aphid death toll is checked, with abbott formulae discovery corrected mortality, if the lethality of contrast is greater than 20%, when secondary test is cancelled after 24h; With SPSS18.0 statistical software, analyzing and processing is carried out to gained test data, draw LC
50value.Second step determines above-mentioned three kinds of oily ratio ranges and optimum proportioning, undertaken by Zhang Zong Ping method: three kinds that record with the above-mentioned first step oily LC
50based on value, measure the drug effect of three kinds of oily different ratio combinations, calculate expection inhibiting rate and the toxicity ratio of the combination of each proportioning.Synergy whether criterion is: the obvious > 1 of toxicity ratio is synergistic effect, and the obvious < 1 of toxicity ratio is antagonism, and toxicity ratio is summation action about 1.The toxicity ratio combined according to each proportioning determines ratio range and the optimum proportioning of three kinds of oily consumptions.3rd step measures above-mentioned three kinds of oily co-toxicity coefficients, undertaken: the three kinds of oil recorded according to the above-mentioned first step and composite mixture LC separately thereof by the abundant method of Sun Yun
50value, calculates three kinds of oil mixture and three mixture co-toxicity coefficient separately (CTC value) together between two; Criterion: CTC > 120 is synergistic effect, CTC > 200 is remarkable synergistic effect, CTC < 80 is antagonism, and 80 < CTC < 120 are summation action.
Result of study: what Toxicity Determination was tested the results are shown in Table 1, when hair oil of bay, elsholtzia splendens oil and gray wool oil of negundo chastetree are used alone, three is to the LC of cigarette aphid
50value is 86.0856mg.L respectively
-1, 109.3066mg.L
-1, 134.0384mg.L
-1.By " hair oil of bay elsholtzia splendens oil mixture ", " hair oil of bay gray wool oil of negundo chastetree mixture ", " the elsholtzia splendens putty hair oil of negundo chastetree mixture " of three kinds of oil by weight 1:1 mixture between two, LC
50value all slightly declines, and strengthens all to some extent the virulence of cigarette aphid, but co-toxicity coefficient only has 136.64,123.83,112.94 respectively, and the synergistic effect of first two mixture is not remarkable, and the latter but only has summation action.And by hair oil of bay, elsholtzia splendens oil, the gray wool oil of negundo chastetree three mixture that 1:1:1 is composite by weight, LC
50value significantly drops to 40.3295mg.L
-1, significantly strengthen the virulence of cigarette aphid, co-toxicity coefficient significantly improves to 263.55, is greater than 200.Visible, only have the mixture of hair oil of bay, elsholtzia splendens oil, gray wool oil of negundo chastetree three mixture, just have significant synergies.
Table 1 mao oil of bay, elsholtzia splendens oil and the composite indoor joint toxicity measuring result to cigarette aphid of gray wool oil of negundo chastetree
Note: hair oil of bay elsholtzia splendens oil mixture, hair oil of bay gray wool oil of negundo chastetree mixture, in elsholtzia splendens putty hair oil of negundo chastetree mixture, the weight ratio between various oil is 1:1; In hair oil of bay elsholtzia splendens putty hair oil of negundo chastetree mixture, three kinds of oily weight ratios are 1:1:1.
Embodiment 2
The preparation of 50% mao of osmanthus elsholtzia splendens gray wool Viticis Negundo Oil Emulsion finish
First adopt steam distillation, from Mao Guiye, elsholtzia splendens herb and gray wool leaf of negundo chastetree, extract hair oil of bay, elsholtzia splendens oil and gray wool oil of negundo chastetree respectively.At 20 ~ 25 DEG C, get 25 parts of hair oil of bays, 15 parts of elsholtzia splendens oil, 10 parts of gray wool oils of negundo chastetree, three is mixed, then 12 parts of organosilicons, 26 parts of organic diesel oil, 8 parts of neopelexes, 1.5 parts of OPEOs and 2.5 parts of phenethyl phenol polyethenoxy polyethenoxy ethers are added successively, 25 minutes are stirred with the mixing speed of 900 revs/min, obtain 50% mao of osmanthus elsholtzia splendens gray wool Viticis Negundo Oil Emulsion finish, the stability of preparation and outward appearance are detected, qualified rear packaging, obtains emulsifiable concentrate finished product.
Embodiment 3
The preparation of 40% mao of osmanthus elsholtzia splendens gray wool oil of negundo chastetree microemulsion
First adopt steam distillation, from Mao Guiye, elsholtzia splendens herb and gray wool leaf of negundo chastetree, extract hair oil of bay, elsholtzia splendens oil and gray wool oil of negundo chastetree respectively.At 20 ~ 25 DEG C, get 20 parts of hair oil of bays, 12 parts of elsholtzia splendens oil, 8 parts of gray wool oils of negundo chastetree, three is mixed, then 6 parts of organosilicons, 13 parts of calcium dodecyl benzene sulfonates, 5 parts of phenethyl phenol polyethenoxy ethers, 5 parts of ethylene glycol are added successively, add deionized water 31 parts again, mix, 25 minutes are stirred with the mixing speed of 900 revs/min, obtain 40% mao of osmanthus elsholtzia splendens gray wool oil of negundo chastetree microemulsion, the stability of preparation and outward appearance are detected, qualified rear packaging, obtains microemulsion finished product.
Embodiment 4
The preparation of 40% mao of osmanthus elsholtzia splendens gray wool oil of negundo chastetree aqueous emulsion
First adopt steam distillation, from Mao Guiye, elsholtzia splendens herb and gray wool leaf of negundo chastetree, extract hair oil of bay, elsholtzia splendens oil and gray wool oil of negundo chastetree respectively.At 20 ~ 25 DEG C, get 20 parts of hair oil of bays, 12 parts of elsholtzia splendens oil, 8 parts of gray wool oils of negundo chastetree, three is mixed, then 2 parts of organosilicons are added successively, 8 parts of polyoxyethylene nonylphenol ether, 4.5 parts of thermally coupled distillation columns, 6 parts of glycerine, xanthans 0.5 part is added after mixing, add deionized water 39 parts again, stir 15 minutes under high-speed shearing emulsion machine is 10000 revs/min with rotating speed, obtain 40% mao of osmanthus elsholtzia splendens gray wool oil of negundo chastetree aqueous emulsion, the stability of preparation and outward appearance are detected, qualified rear packaging, obtain aqueous emulsion finished product.
Embodiment 5
Hair oil of bay, elsholtzia splendens oil and gray wool oil of negundo chastetree Recompounded pesticide are to the field control effectiveness test of cigarette aphid
Materials and methods: reagent agent is 50% mao of osmanthus elsholtzia splendens gray wool Viticis Negundo Oil Emulsion finish, 40% mao of osmanthus elsholtzia splendens gray wool oil of negundo chastetree microemulsion, 40% mao of osmanthus elsholtzia splendens gray wool oil of negundo chastetree aqueous emulsion, in the formula of each medicament, above-mentioned three kinds of oily weight ratios are 5:3:2.Supply examination vega to be Liuyang City of Hunan Province tobacco-rice rotation fields, the flue-cured tobacco cultivars of plantation is K326.Test is for small plot experiment, and 3 replicated plots are all established in each process, if clear water contrast, and sets up defences and controls the conventional chemical agent positive control of cigarette aphid.Each community is all determined strain and is marked the blade that 10 have cigarette aphid, adds up the quantity of full leaf cigarette aphid, ensures that every community cigarette aphid number is greater than 120.With plastics knapsack sprayer respectively by 500 of each reagent agent times, 1000 times, 1500 times dilutions, and control cigarette aphid commonly uses 1500 times of dilutions of chemical agent, imposes on tobacco leaf tow sides by conventional spray.The cigarette aphid radix of the every community of investigation before dispenser, respectively at day investigation cigarette aphid alive number of the 1st, 3,7 after dispenser.Control efficiency by each medicament of following formulae discovery:
wherein, Pt0: borer population of living before chemicals treatment district medicine, Pt1: borer population of living after chemicals treatment district medicine, CK0: borer population of living before blank district medicine, CK1: borer population of living after blank district medicine.
Result of the test: as known from Table 2, by hair oil of bay, elsholtzia splendens oil, composite 40% microemulsion, 40% aqueous emulsion and 50% emulsifiable concentrate made of gray wool oil of negundo chastetree, all show in the field control effectiveness test of control cigarette aphid and have obvious slow, their quick-acting is all remarkable in chemical pesticide 20% Imidacloprid missible oil.Be under the condition of 500 times at extension rate, the preventive effect of above-mentioned three Plants source medicaments after medicine 1 day all more than 81%, after medicine 3 days all more than 91%, within after medicine 7 days, reach 98.83%, 96.94% and 98.54% respectively, the preventive effect of now diluting 1500 times with chemical pesticide 20% Imidacloprid missible oil is close, demonstrates and has significant control efficiency; Be under the condition of 1000 times at extension rate, above-mentioned three Plants source medicaments preventive effect of 7 days after medicine is respectively 92.41%, 87.54% and 93.75%, also has significant control efficiency.Visible, hair oil of bay, elsholtzia splendens oil and the composite botanical pesticide made of gray wool oil of negundo chastetree, have significant control efficiency to cigarette aphid.The preventive effect of above-mentioned three Plants source medicaments is roughly close, and comparatively speaking the effect of 40% microemulsion is suitable with 50% emulsifiable concentrate, and the two is all better than 40% aqueous emulsion.
Table 2 mao oil of bay, elsholtzia splendens oil and gray wool oil of negundo chastetree Recompounded pesticide are to cigarette aphid field control effectiveness test result
Note: in the formula of three kinds of formulation agricultural chemicals, hair oil of bay, elsholtzia splendens oil, the weight ratio of gray wool oil of negundo chastetree is 5:3:2.
Claims (8)
1. prevent and treat a botanical pesticide for cigarette aphid, it is characterized in that, the composition be made up of hair oil of bay, elsholtzia splendens oil and gray wool oil of negundo chastetree, allocates emulsifiable concentrate, microemulsion or aqueous emulsion that auxiliary agent is made into; In described composition, the mass percentage content of each component is: hair oil of bay 30 ~ 65%, elsholtzia splendens oil 20 ~ 45%, gray wool oil of negundo chastetree 15 ~ 35%; Described emulsifiable concentrate comprises following mass percent component: composition 20 ~ 70%, emulsifier 5 ~ 20%, synergist 5 ~ 20%, bleeding agent 10 ~ 40%; Described microemulsion comprises following mass percent component: composition 10 ~ 60%, surfactant 7 ~ 25%, synergist 3 ~ 15%, antifreezing agent 5 ~ 10%, deionized water 10 ~ 60%; Described aqueous emulsion comprises following mass percent component: composition 10 ~ 60%, surfactant 5 ~ 20%, synergist 1 ~ 15%, antifreezing agent 5 ~ 10%, thickener 0.4 ~ 1%, deionized water 10 ~ 70%.
2. botanical pesticide as claimed in claim 1, is characterized in that, described hair oil of bay, elsholtzia splendens oil and gray wool oil of negundo chastetree are extracted respectively by steam distillation to obtain from Mao Guiye, elsholtzia splendens herb and gray wool leaf of negundo chastetree.
3. botanical pesticide as claimed in claim 1, it is characterized in that, described synergist is one or more in Octacide 264, organosilicon, azone, alkyl carbonate, chlorinated aliphatic.
4. botanical pesticide as claimed in claim 1, it is characterized in that, described emulsifier is one or more in alkyl benzene sulfonate, phenethyl phenol polyethenoxy ethers, phenethyl phenol polyethenoxy polyoxypropylene ethers, alkylphenol polyoxyethylene class, tween.
5. botanical pesticide as claimed in claim 1, it is characterized in that, described surfactant is one or more in alkylphenol polyoxyethylene class, alkyl benzene sulfonate, phenethyl phenol polyethenoxy ether polyoxypropylene ethers, phenethyl phenol polyethenoxy ethers, NaLS, sodium alkyl sulfate, tween; Described antifreezing agent is one or more in ethylene glycol, propane diols, glycerine.
6. botanical pesticide as claimed in claim 1, it is characterized in that, described bleeding agent is one or more in azone, organic diesel oil, epoxidized soybean oil, tung oil.
7. botanical pesticide as claimed in claim 1, it is characterized in that, described thickener is one or more in xanthans, gum Arabic, Magnesiumaluminumsilicate, sodium carboxymethylcellulose.
8. an application for botanical pesticide as claimed in claim 1, is characterized in that, allocates botanical pesticide emulsifiable concentrate, microemulsion or aqueous emulsion that auxiliary agent makes into be applied to and prevent and treat cigarette aphid by hair oil of bay, elsholtzia splendens oil and the composition that form of gray wool oil of negundo chastetree.
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