CN114052037A - Acaricidal composition containing bistrifluron and etoxazole and application thereof - Google Patents

Acaricidal composition containing bistrifluron and etoxazole and application thereof Download PDF

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CN114052037A
CN114052037A CN202111418627.5A CN202111418627A CN114052037A CN 114052037 A CN114052037 A CN 114052037A CN 202111418627 A CN202111418627 A CN 202111418627A CN 114052037 A CN114052037 A CN 114052037A
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etoxazole
bistrifluron
acaricidal composition
composition according
acaricidal
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CN114052037B (en
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葛家成
张成南
刘金玲
张永芳
李健
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QINGDAO KAIYUANXIANG CHEMICAL CO Ltd
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QINGDAO KAIYUANXIANG CHEMICAL CO Ltd
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    • AHUMAN NECESSITIES
    • A01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01NPRESERVATION 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
    • A01N47/00Biocides, 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
    • A01N47/08Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom not being member of a ring and having no bond to a carbon or hydrogen atom, e.g. derivatives of carbonic acid the carbon atom having one or more single bonds to nitrogen atoms
    • A01N47/28Ureas or thioureas containing the groups >N—CO—N< or >N—CS—N<
    • A01N47/34Ureas or thioureas containing the groups >N—CO—N< or >N—CS—N< containing the groups, e.g. biuret; Thio analogues thereof; Urea-aldehyde condensation products
    • AHUMAN NECESSITIES
    • A01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01GHORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
    • A01G13/00Protecting plants
    • AHUMAN NECESSITIES
    • A01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01NPRESERVATION 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
    • A01N43/00Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds
    • A01N43/72Biocides, 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
    • A01N43/74Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with nitrogen atoms and oxygen or sulfur atoms as ring hetero atoms five-membered rings with one nitrogen atom and either one oxygen atom or one sulfur atom in positions 1,3
    • A01N43/761,3-Oxazoles; Hydrogenated 1,3-oxazoles
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/30Against vector-borne diseases, e.g. mosquito-borne, fly-borne, tick-borne or waterborne diseases whose impact is exacerbated by climate change

Abstract

The invention belongs to the technical field of pesticide acaricide, and particularly relates to an acaricidal composition containing bistrifluron and etoxazole. The insecticidal composition comprises active ingredients of bistrifluron and etoxazole, and the mass ratio of the active ingredients of bistrifluron to the etoxazole is 1: 32-45: 1. The bistrifluron and etoxazole in the composition have completely different action mechanisms, have obvious synergistic action, can enhance the activity to target mites, expand the acaricidal spectrum, reduce the resistance generated by single application, and achieve the effects of synergism and application reduction.

Description

Acaricidal composition containing bistrifluron and etoxazole and application thereof
Technical Field
The invention relates to the technical field of pesticide acaricide, in particular to an acaricidal composition containing bistrifluron and etoxazole and application thereof.
Background
Mites are pests which are difficult to control in agricultural production, and are small in size, rapid in propagation, short in development period, small in action range, strong in adaptability, high in mutation rate and resistant to drugs. After the 70 s of the 20 th century, phytophagous harmful mites represented by spider mites have risen to be important pests of fruit trees, vegetables and crops, and have a tendency to spread and aggravate worldwide.
Etoxazole is a mite growth inhibitor and has a chemical name: 4- (4-tert-butyl-2-ethoxyphenyl) -2- (2, 6-difluorophenyl) -4, 5-dihydro-1, 3-oxazole. Etoxazole is a diphenyl oxazoline acaricide which is on the market in the chemical development of Sumitomo Japan in 1998, has the action mechanism of inhibiting normal ecdysis of mites, has ovicidal activity and has good control effect on young mites and nymphs in various developmental states. The compound has high risk to aquatic spine animals and non-target arthropods, and has the problems of biological enrichment, toxicity and the like.
The bistrifluron is a high-efficiency insect growth regulator screened from benzoyl urea derivatives, and has the chemical name: 1- [ (2-fluoro-3, 5-bis (trifluoromethyl) phenyl) -3- (2, 6-difluorobenzoyl) ] urea. The benzoyl urea derivatives (BPUS) are Insect Growth Regulators (IGRs) which inhibit the synthesis of insect chitin and have stomach toxicity, have high specificity, are very effective to the juvenile period of insects, can be quickly degraded in the environment and have low toxicity to mammals.
In the agricultural production process, because human beings adopt a single chemical agent to control pests once, spider mites are raised from secondary pests to main pests. The Chinese tends to be more and more spread year by year. Chemical control, although having many drawbacks, is still the most effective means of controlling mites at present and is still difficult to produce without dependence on acaricides for a long time. By mixing two or more medicaments with different action mechanisms, different pest mites can be treated, the control effect of the medicaments is improved, and the generation of drug resistance of the pest mites is reduced. In addition, in the prior art, the technical scheme of the composition containing bistrifluron and etoxazole is not specifically disclosed.
Disclosure of Invention
The invention aims to provide an acaricidal composition containing bistrifluron and etoxazole, which has a synergistic effect, low use cost and good control effect.
In order to achieve the purpose, the invention adopts the technical scheme that: the insecticidal composition comprises an active ingredient A, bistrifluron and an active ingredient B, etoxazole, wherein the mass ratio of the active ingredient A to the active ingredient B is 1: 32-45: 1;
further, the mass ratio of bistrifluron to etoxazole is 1:32, 1:24, 1:8, 1:3, 2:1, 6:1, 12:1, 32:1 and 45: 1;
further, the mass ratio of the active ingredient A to the active ingredient B is 1: 32-32: 1;
further, the mass ratio of bistrifluron to etoxazole is 1: 8-32: 1;
further, the mass ratio of bistrifluron to etoxazole is 1: 3-6: 1;
further, the sum of the contents of the active ingredient A and the active ingredient B in the insecticidal composition is 1-85% by weight of the total mass of the insecticidal composition being 100 wt%;
further, the sum of the content of the active ingredient A and the content of the active ingredient B in the insecticidal composition is 5-60 percent;
further, the insecticidal composition also comprises an auxiliary agent, wherein the auxiliary agent comprises a carrier and an auxiliary agent;
further, the carrier is one, two or three of water, solvent or filler;
further, the water is deionized water;
further, the solvent is selected from one or a mixture of more of N, N-dimethylformamide, cyclohexanone, toluene, xylene, dimethyl sulfoxide, methanol, ethanol, trimethylcyclohexanone, N-octylpyrrolidone, ethanolamine, triethanolamine, isopropylamine, N-methylpyrrolidone, propanol, butanol, ethylene glycol, diethylene glycol, ethylene glycol methyl ether, butyl ether, ethanolamine, isopropylamine, ethyl acetate or acetonitrile;
further, the filler is selected from one or a mixture of more of kaolin, diatomite, bentonite, attapulgite, white carbon black, starch or light calcium carbonate;
the auxiliary agent at least comprises a surfactant, and other functional auxiliary agents such as an antifreezing agent, a thickening agent, a stabilizing agent, a disintegrating agent, a defoaming agent, a slow release agent, a binder and the like can be added according to different use occasions and requirements;
the surfactant is selected from one or more of an emulsifier, a dispersant, a wetting agent, a dispersion medium or a penetrant. The surfactant is a single agent or a compound preparation of a common nonionic surfactant or an anionic surfactant;
the other functional auxiliary agents are selected from one or more of an antifreezing agent, a thickening agent, a stabilizing agent, a disintegrating agent or a defoaming agent;
further, the emulsifier is selected from one or more of agricultural milk 500# (calcium alkyl benzene sulfonate), OP series phosphate (surfactant phosphate), 600# phosphate (phenyl phenol polyoxyethylene ether phosphate), styrene polyoxyethylene ether wetting agent salt, magnesium salt of alkyl diphenyl ether disulfonate, triethanolamine salt, agricultural milk 400# (benzyl dimethyl phenol polyoxyethylene ether), agricultural milk 700# (alkylphenol formaldehyde resin polyoxyethylene ether), Ning milk 36# (phenethylphenol formaldehyde resin polyoxyethylene ether), agricultural milk 1600# (phenethylphenol polyoxyethylene polypropylene ether), ethylene oxide-propylene oxide block copolymer, OP series (surfactant), BY series (castor oil polyoxyethylene ether), agricultural milk 33# (alkylaryl polyoxyethylene propylene ether), span series (sorbitan monostearate), Tween series (sorbitan fatty acid ester polyoxyethylene ether) or AEO series (fatty alcohol polyoxyethylene ether) An agent;
further, the dispersing agent is selected from one or a mixture of a plurality of polycarboxylate, lignosulfonate, alkylphenol polyoxyethylene formaldehyde condensate sulfate, calcium alkylbenzene sulfonate, naphthalene sulfonic acid formaldehyde condensate sodium salt, alkylphenol polyoxyethylene, fatty amine polyoxyethylene, fatty acid polyoxyethylene or glycerol fatty acid ester polyoxyethylene;
further, the wetting agent is selected from one or a mixture of more of sodium dodecyl sulfate, sodium dodecyl benzene sulfonate, nekal BX, wetting penetrant F, Chinese honeylocust fruit powder, silkworm excrement or soapberry powder;
further, the penetrating agent is selected from a mixture consisting of one or more of penetrating agent JFC (fatty alcohol-polyoxyethylene ether), penetrating agent T (diisooctyl maleate sulfonate), azone or organic silicon;
further, a dispersion medium such as one or more of soybean oil, rapeseed oil, wheat oil, methyl oleate, diesel oil, machine oil, mineral oil, and the like;
further, the antifreezing agent is a mixture consisting of one or more of ethylene glycol, propylene glycol, glycerol or urea;
further, the thickening agent is selected from one or more of xanthan gum, a disintegrating agent, bentonite, carboxymethyl cellulose or magnesium aluminum silicate;
further, the stabilizer is selected from one or more of epoxidized soybean oil, epichlorohydrin, BHT, ethyl acetate and triphenyl phosphate;
further, the disintegrating agent is selected from one or more of bentonite, urea, wetting agent, aluminum chloride, low-substituted hydroxypropyl cellulose, lactose, citric acid, succinic acid or sodium bicarbonate;
further, the defoaming agent is selected from one or a mixture of more of silicone oil, silicone compounds, C10-C20 saturated fatty acid compounds or C8-C10 fatty alcohol compounds;
further, the insecticidal composition can be prepared into preparations acceptable in pesticides, including solid preparations, liquid preparations, seed treatment agents and other preparations;
further, the solid preparation comprises water dispersible granules, wettable powder and granules; the liquid preparation comprises a suspending agent, an aqueous emulsion and missible oil;
furthermore, the dosage form of the acaricidal composition comprises a suspending agent, water dispersible granules and missible oil;
further, the acaricidal composition is prepared into a suspending agent, and the acaricidal composition preferably comprises the following components in percentage by weight: 0.1-50% of bistrifluron, 0.1-50% of etoxazole, 2-10% of dispersant, 2-10% of wetting agent, 0.01-2% of defoaming agent, 0-2% of thickening agent, 0-8% of antifreezing agent and the balance of deionized water;
further, the acaricidal composition is prepared into water dispersible granules, and the water dispersible granules preferably comprise the following components in percentage by weight: 0.1-50% of bistrifluron, 0.1-50% of etoxazole, 3-12% of dispersant, 1-8% of wetting agent, 1-10% of disintegrant and the balance of filler;
furthermore, the acaricidal composition is prepared into missible oil, and the components and the content of the missible oil are preferably as follows: 0.1-50% of bistrifluron, 0.1-50% of etoxazole, 5-40% of emulsifier and 100% of solvent;
an application of an acaricidal composition containing bistrifluron and etoxazole in preventing and treating phytophagous mites of agriculture, forestry and gardening plants;
further, the agricultural, forestry and horticultural plants include: citrus trees, apple trees, cherry trees, pear trees, tea trees, flowers, cotton and strawberries.
Further, the phytophagous mites include Tetranychoideae (Tetranychoidea), Onychidae (Eriophyoidea), Tarsonemuidea (Tarsonemoidea);
further, the phytophagous harmful mites are general acarus;
further, the general family of spider mites includes any one or more of Tetranychus urticae (Tetranychus urticae), Panonychus citri (Panychus citri), Panonychus ulmi (Panychus ulmi), and Citrus aurantiaca (Eotetranychus kankittus).
Further, the acaricidal composition is applied to a medium requiring control of the mites or their growth in an effective amount. The insecticidal composition has the beneficial effects that:
(1) the bistrifluron and etoxazole in the acaricidal composition have completely different action mechanisms, so that the generation of drug resistance of harmful mites can be delayed;
(2) the acaricidal composition can improve the acaricidal activity to phytophagous mites, has obvious synergistic effect and reduces the dosage;
(3) the acaricidal composition can improve the quick action and the persistence of the medicament and has better control effect on mites.
Detailed Description
To make the technical solutions, objects, and advantages of the present invention more apparent, the present invention is described with the following specific examples, but the present invention may be implemented in various forms and should not be limited by the embodiments set forth herein.
Formulation preparation example:
example 124% Flufenoxuron-etoxazole suspension (5:1)
The formula is as follows: 20% of bistrifluron, 4% of etoxazole, 1% of sodium dodecyl sulfate, 1% of sodium polycarboxylate, 3% of styrol polyoxyethylene ether phosphate, 0.2% of xanthan gum, 1% of magnesium aluminum silicate, 5% of propylene glycol, 0.01% of benzisothiazolinone potassium, 0.5% of silicone oil and deionized water to make up the balance;
the preparation method comprises the following steps: according to the formula proportion, the effective components of bistrifluron, etoxazole, surfactant and other functional additives are sequentially placed in a reaction kettle, water is added for uniform mixing, and the suspending agent product is obtained through high-speed shearing, wet sanding and finally homogeneous filtration.
Example 220% Flufenoxuron Etoxazole suspension (1:3)
The formula is as follows: 5% of bistrifluron, 15% of etoxazole, 0.5% of isomeric tridecanol polyoxyethylene ether, 4% of alkylphenol polyoxyethylene ether phosphate, 1% of sodium lignosulfonate, 0.25% of xanthan gum, 5% of glycerol, 0.1% of sodium benzoate, 0.5% of silicone oil and deionized water for balancing;
the preparation method comprises the following steps: the same as in example 1.
Example 330% Diflufenuron etoxazole suspension (2:1)
The formula is as follows: 20% of bistrifluron, 10% of etoxazole, 1% of fatty alcohol-polyoxyethylene ether, 2% of alkylaryl polyoxyethylene ether polyoxypropylene ether, 3% of styrol polyoxyethylene ether sulfate, 1% of sodium polycarboxylate, 1% of magnesium aluminum silicate, 0.2% of xanthan gum, 1% of sodium sorbate, 5% of ethylene glycol, 0.5% of silicone oil and deionized water, and the balance is made up;
the preparation method comprises the following steps: the same as in example 1.
Example 420% Flufenoxuron Etoxazole Water dispersible granule (1:3)
The formula is as follows: 5% of bistrifluron, 15% of etoxazole, 10% of lignosulfonate, 4% of sodium dodecyl benzene sulfonate, 2% of sodium dodecyl sulfate, 30% of starch and kaolin for balance;
the preparation method comprises the following steps: according to the formula proportion of the embodiment, active ingredients of bistrifluron and etoxazole are added into a carrier, a surfactant and other functional auxiliaries are added into the carrier, the carrier and the surfactant are mixed, 10-25% of water is added after the air flow crushing, and then the water dispersible granule product is prepared through kneading, granulating, drying and screening.
Example 530% Diflufenuron etoxazole Water dispersible granules (1:2)
The formula is as follows: 10% of bistrifluron, 20% of etoxazole, 8% of sodium lignosulfonate, 3% of sodium polycarboxylate, 1% of succinate sulfonate, 1.5% of sodium dodecyl benzene sulfonate, 5% of white sugar and kaolin for supplementing the balance;
the preparation method comprises the following steps: the same as in example 4.
Example 6: 40% bistrifluron etoxazole water dispersible granule (1:3)
The formula is as follows: 10% of bistrifluron, 30% of etoxazole, 8% of naphthalenesulfonate formaldehyde condensate, 2% of sodium polycarboxylate, 2% of sodium dodecyl sulfate, 10% of ammonium sulfate and starch for balance;
the preparation method comprises the following steps: the same as in example 4.
Preparation example 720% Diflufenuron etoxazole emulsifiable concentrate (3:1)
The formula is as follows: 15% of bistrifluron, 5% of etoxazole, 15% of DMF (dimethyl formamide), 14% of styrylphenol polyoxyethylene ether, 2% of calcium dodecyl benzene sulfonate, 20% of propylene carbonate and the balance of xylene;
the preparation method comprises the following steps: adding the metered bistrifluron, etoxazole, solvent and cosolvent into a blending kettle, stirring to dissolve the bistrifluron, adding the emulsifier, complementing the balance with the residual solvent, uniformly stirring in a stirring kettle, and filtering to obtain the missible oil required by the invention.
Preparation example 818% Diflufenuron etoxazole emulsifiable concentrate (2:1)
The formula is as follows: 12% of bistrifluron, 6% of etoxazole, 20% of N-methyl pyrrolidone, 11% of alkylphenol polyoxyethylene, 3% of castor oil polyoxyethylene ether, 2% of calcium dodecyl benzene sulfonate, 10% of DMF and the balance of solvent oil;
the preparation method comprises the following steps: the same as in preparation example 7.
Preparation 910% Diflufenuron etoxazole emulsifiable concentrate (1:1)
The formula is as follows: 5% of bistrifluron, 5% of etoxazole, 12% of EO/PO block copolymer, 2% of sorbitan fatty acid ester polyoxyethylene ether, 15% of acetophenone, 10% of N-octyl pyrrolidone, 1% of calcium dodecylbenzene sulfonate and trimethylbenzene, wherein the balance is 100%;
the preparation method comprises the following steps: the same as in preparation example 7.
Indoor biological activity assay
Joint toxicity of bistrifluron and etoxazole mixed to panonychus citri
Examples reference indoor bioassay test guidelines for pesticides:
section 13: leaf disc spraying method NT/T1154.13-2008;
section 7: the combined effect of compounding was determined for NT/T1154.7-2008.
The bistrifluron technical product and the etoxazole technical product are provided by the research and development center of the group.
Test targets: panonychus citri (panocychs citri Wcgregov); selecting indoor feeding nymphs with consistent physiological state. The temperature is 25 +/-1 ℃ C. Relative humidity 65% + -5%, light period 16/8h (L/D).
Selecting host plant leaves (citrus leaves) with consistent growth, making into leaf discs with the diameter of 2cm by using a puncher, placing agar in a culture dish for moisturizing, placing filter paper on the agar, placing leaf discs on the filter paper, wherein each leaf disc comprises 2 leaf discs, and inoculating mites fed indoors onto the leaf discs, wherein 20 mites are placed on each leaf disc.
Preparing a medicament: the original medicine is prepared into mother liquor by using organic solvent acetone, and then diluted by using 0.1% Tween-80 aqueous solution. Preparing single-dose mother liquor respectively, designing 5 groups of proportioning according to the mixing purpose and the medicament activity, and preparing 5 series of mass concentrations of each single dose and each group of proportioning mixing agent according to an equal ratio method.
Medicament treatment: the spray pressure of the Potter spray tower was 1.47X 105Pa, the cleaned spray head was cleaned with acetone for 2 times and then with distilled water for 2 times.
Placing the culture dish on a bottom plate of a Potter spray tower for spraying, wherein the spraying liquid amount is 1mL, taking out after the liquid medicine is settled for 1min, and transferring to a breeding condition for breeding.
The treatment is repeated for not less than 4 times, the number of the tested insects is not less than 120 per dose, and the treatment without medicament (containing all organic solvent and emulsifier) is used as a blank control.
Data statistics and analysis: and (5) checking the death condition of the test insects 48 hours after treatment, and respectively recording the total number of the insects and the number of the dead insects.
From the survey data, corrected mortality for each treatment was calculated. Calculating according to the formulas (1) and (2), and reserving the calculation results to the last two decimal points:
Figure BDA0003375995880000061
in the formula:
p-mortality in percent (%);
k-represents the number of dead insects, in head;
n-represents the total number of insects treated, in heads.
Figure BDA0003375995880000062
In the formula:
P1corrected mortality in percent (%);
Pt-treatment mortality in percent (%);
P0blank mortality in percent (%).
If the control mortality rate is less than 5%, no correction is needed; the control mortality rate is between 5% and 20%, and the correction is carried out according to the formula (2); control mortality was > 20%, and the test was redone.
And processing the data by adopting a method of analyzing a few rate value. Can be analyzed by an IBM SPSS Statistics 20 statistical analysis system to obtain a virulence regression equation and LC50The values and their 95% confidence limits, r values, the activity of the test agents on the biological test material was evaluated.
The co-toxicity coefficient (CTC value) of the mixture is calculated according to the following formula (3), formula (4) and formula (5):
Figure BDA0003375995880000071
in the formula:
ATI-actually measured toxicity index of mixed agent;
S-LC of Standard acaricide50In milligrams per liter (mg/L);
LC of M-mixtures50In milligrams per liter (mg/L).
TTI=TIA*PA+TIB*PB·······(4)
In the formula:
TTI-mixture theory virulence index;
TIA-agent virulence index a;
PA-the percentage of agent a in the mixture in percent (%);
TIB-agent B virulence index;
PB-the percentage of the agent B in the mixture in percent (%).
Figure BDA0003375995880000072
In the formula:
CTC-co-toxicity coefficient;
ATI-actually measured toxicity index of mixed agent;
TTI-mixture theory virulence index.
The compounded co-toxicity coefficient CTC is more than or equal to 120, and the synergistic effect is shown; CTC is less than or equal to 80 and shows antagonism; 80 < CTC < 120 showed additive effects. Indoor toxicity test results:
TABLE 1 Joint virulence determination of Panonychus citri Miq by Bitflurea and Etoxazole in different ratios
Figure BDA0003375995880000073
Figure BDA0003375995880000081
The results in Table 1 show that bistrifluron has better acaricidal activity on Panonychus citri Mikroods, LC50The value is 37.248mg/L, the toxicity of etoxazole is higher than that of bistrifluron, and LC of etoxazole is50The value was 18.757 mg/L. The mass ratio of bistrifluron to etoxazole is in the range of 1: 32-45: 1, and the synergistic effect or additive effect is shown, wherein the mass ratio of bistrifluron to etoxazole is in the range of 1: 32-32: 1, the synergistic effect is shown, the mass ratio of bistrifluron to etoxazole is 1: 8-32: 1, the cotoxicity coefficient (CTC) is more than 145, and the synergistic effect is obvious.
Examples of the effects of the field
Triflufenoxuron and etoxazole field test for controlling panonychus citri
Test work: citrus fruit
Test subjects: panonychus citri Miq
Test site: guangxi Guilin
Experiment time: 20 days 3 month in 2020
Test site: the soil fertility of the test field is medium, the terrain is smooth, the fertility is uniform, and the irrigation condition is good. All test plot cultivation conditions (soil type, fertilization, cultivation, row spacing, etc.) were uniform and consistent with local agricultural cultivation practices (GAP).
And (3) test treatment: each treatment was performed in random block arrays, with a cell area of 2 citrus trees, repeated 4 times.
The drug application equipment comprises: the pesticide application apparatus is a WS-16D guard electric sprayer, the spray head is a single fan-shaped fog spray head, the working pressure is 0.15-0.4Mpa, and the dosage is accurately measured according to the dosage requirement of the pesticide and the area of a cell. When dispensing, firstly adding clean water with one third of actual water consumption into the sprayer, adding a little water into the small measuring cup to uniformly stir the medicament, pouring the medicament into the sprayer, and finally adding the rest water and uniformly mixing. When the pesticide is applied, the control is sprayed firstly, and the spraying is carried out from low concentration to high concentration in sequence, and the constant spraying method is adopted, and the uniform spraying is carried out at a constant speed according to the calculated step speed. When different medicaments are replaced, the sprayer is cleaned for three times, and water in the spray rod is completely sprayed out.
The weather is good during the test period, and on the test medicine day, the daily average temperature is 15 ℃, the highest temperature is 27 ℃, the lowest temperature is 8 ℃ and the relative humidity is 80%.
The investigation method comprises the following steps: tender tips (5 leaves) are marked in five directions of east, west, south, north and middle of the tree in each plot, namely 25 leaves in each hang tag are investigated, and the number of active mites on the leaves is investigated. And directly observing the leaves by using a handheld magnifier, and counting the number of mites.
Live mite counts were investigated 1d, 7d, 21d after application.
The drug effect calculation method comprises the following steps: the drug effect is calculated by the following formula (6) and formula (7):
Figure BDA0003375995880000082
Figure BDA0003375995880000091
during the test period, the growth of the citrus in each treatment cell is observed to be good, and no phytotoxicity is generated in each treatment.
The test results of the treatment agents for controlling panonychus citri are as follows:
TABLE 2 field test results of different test agents on Panonychus citri
Figure BDA0003375995880000092
Note: the control (%) in the table above is the average of each repetition. Lower case letters represent 5% level difference and upper case letters represent 1% level difference.
The field test results show that (table 2) different test agents have good control effect on panonychus citri.
1d after application, the control effect of the compound preparation example of the bistrifluron and etoxazole on panonychus citri is more than 85.58%, each group shows good quick-acting performance, test data are processed by using an IBM SPSS data processing software through a Duncan new range error (Duncan) method, and the analysis of variance shows that the compound groups are different from a control group at the levels of 0.01 and 0.05.
Along with the increase of time, the control effect is increased after 7 days, and the control effects of the mixed treatment are respectively 90.25%, 91.88%, 90.28%, 87.14%, 24% of bistrifluron-etoxazole suspending agent (5:1), 30% of bistrifluron-etoxazole suspending agent (2:1) and 20% of bistrifluron-etoxazole missible oil (3:1) are more than 90%.
After the pesticide is applied, the control effects of 21d, 24% of bistrifluron-etoxazole suspending agent (5:1), 30% of bistrifluron-etoxazole suspending agent (2:1), 20% of bistrifluron-etoxazole missible oil (3:1) and 40% of bistrifluron-etoxazole water dispersible granules (1:3) are 90.44%, 92.78%, 90.86% and 89.99% respectively, and the pesticide has better lasting effect.
According to test results, the compound acaricide can effectively control the harm of panonychus citri in a short time when the panonychus citri is in the initial period, the economic loss of the citrus caused by insect pests is reduced, uniform spraying is recommended when the acaricide is applied, and the spraying is emphasized on the leaf back.
Through indoor toxicity measurement and field tests, the pesticide composition compounded by the bistrifluron and the etoxazole has good control effect on pest mites.
Although the invention has been described in detail with respect to the general description and the specific embodiments, it will be apparent to those skilled in the art that modifications and improvements can be made thereto without departing from the spirit of the invention.

Claims (10)

1. An acaricidal composition containing bistrifluron and etoxazole, which is characterized in that: the acaricidal composition comprises active ingredients of bistrifluron and etoxazole, and the mass ratio of the bistrifluron to the etoxazole is 1: 32-45: 1.
2. An acaricidal composition according to claim 1, characterized in that: the mass ratio of bistrifluron to etoxazole is 1: 32-32: 1.
3. An acaricidal composition according to claim 1, characterized in that: the mass ratio of bistrifluron to etoxazole is 1: 8-32: 1;
preferably, the mass ratio of bistrifluron to etoxazole is 1: 3-6: 1.
4. An acaricidal composition according to claim 1, characterized in that: the sum of the content of the bistrifluron and the etoxazole in the acaricidal composition is 1-85% by weight of the total weight of the acaricidal composition being 100 wt%;
preferably, the sum of the content of the bistrifluron and the content of the etoxazole in the acaricidal composition is 5-60%.
5. An acaricidal composition according to claim 4, characterized in that: the acaricidal composition also comprises an adjuvant, wherein the adjuvant comprises a carrier and an auxiliary agent.
6. An acaricidal composition according to claim 5, characterized in that: the acaricidal composition can be prepared into preparations acceptable in pesticides, including solid preparations, liquid preparations, seed treatment agents and other preparations;
preferably, the solid preparation comprises water dispersible granules, wettable powder and granules; the liquid preparation comprises a suspending agent, an aqueous emulsion and missible oil;
preferably, the preparation comprises any one of suspending agent, water dispersible granule and missible oil.
7. Use of the acaricidal composition according to any one of claims 1 to 6 for the control of phytophagous mites of agricultural and forestry and horticultural plants.
8. Use of the acaricidal composition according to claim 7, characterized in that: the phytophagous mites comprise Tetranychoideae, Onychidae and Tarsonemoidea;
preferably, the phytophagous mites are spider mite superfamily.
9. Use of the acaricidal composition according to claim 8, characterized in that: the general family of spider mites includes any one or more of Tetranychus urticae (Tetranychus urticae), Panonychus citri (Panychus citri), Panonychus ulmi (Panychus ulmi) and Citrus aurantiaca (Eotetranychus kankittus).
10. Use of the acaricidal composition according to claim 7, characterized in that: the acaricidal composition is applied to a medium to be controlled or the growth of the acarid in an effective amount.
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