CN115281198A - Insecticidal composition for preventing and treating oriental-melon liriomyza sativae and prevention and treatment method - Google Patents

Insecticidal composition for preventing and treating oriental-melon liriomyza sativae and prevention and treatment method Download PDF

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CN115281198A
CN115281198A CN202210515750.7A CN202210515750A CN115281198A CN 115281198 A CN115281198 A CN 115281198A CN 202210515750 A CN202210515750 A CN 202210515750A CN 115281198 A CN115281198 A CN 115281198A
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cyromazine
pyriproxyfen
insecticidal composition
agent
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张通
曹巧利
冯塔
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Shaanxi Meibang Pharmaceutical Group 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
    • A01N43/34—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one nitrogen atom as the only ring hetero atom
    • A01N43/40—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one nitrogen atom as the only ring hetero atom six-membered rings
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
    • A01N43/00—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds
    • A01N43/64—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with three nitrogen atoms as the only ring hetero atoms
    • A01N43/66—1,3,5-Triazines, not hydrogenated and not substituted at the ring nitrogen atoms
    • A01N43/68—1,3,5-Triazines, not hydrogenated and not substituted at the ring nitrogen atoms with two or three nitrogen atoms directly attached to ring carbon atoms
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01P—BIOCIDAL, PEST REPELLANT, PEST ATTRACTANT OR PLANT GROWTH REGULATORY ACTIVITY OF CHEMICAL COMPOUNDS OR PREPARATIONS
    • A01P7/00—Arthropodicides
    • A01P7/04—Insecticides

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Abstract

The invention discloses an insecticidal composition for preventing and treating oriental fruit liriomyza sativae and a prevention and treatment method, and particularly relates to an insecticidal composition containing pyriproxyfen and cyromazine, wherein the insecticidal composition contains pyriproxyfen, cyromazine, an auxiliary agent and other excipients and is prepared into a suspending agent, and the weight ratio of the pyriproxyfen to the cyromazine is 1:3. The insecticidal composition can improve the pesticide effect of controlling the oriental fruit liriomyza sativae, has the control effect obviously superior to that of a control single agent, and has long lasting period.

Description

Insecticidal composition for preventing and treating oriental-melon liriomyza sativae and prevention and treatment method
Technical Field
The invention belongs to the technical field of pesticides, and particularly relates to an insecticidal composition for preventing and treating oriental fruit liriomyza sativae and a prevention and treatment method.
Background
Pyriproxyfen, english name: pyriproxyfen, molecular formula: c 20 H 19 NO 3 The chemical name is: 4-phenoxyphenyl (RS) -2- (2-pyridyloxy) propyl ether; pyriproxyfen; 4-Phenoxyphenyl- (RS) - [2- (2-pyridyloxy) propyl]An ether of a carboxylic acid with a carboxylic acid group,
pyriproxyfen is used to control public health pests. A phenyl ether insect growth regulator is a juvenile hormone type chitin synthesis inhibitor. Can also be used for preventing and treating sweet potato whitefly and scale insect.
Cyromazine, english name: cyromazine, cyromazine, 1,3,5-triazine insect growth regulators, has special activity on dipteran larvae, can induce dipteran larvae and pupae to be distorted in morphology, and ensure that adult eclosion is incomplete or inhibited. Is used for controlling flies in animal stables and controlling agricultural pests such as Liriomyza sativae, eggplant, kidney bean, leaf vegetables and flowers.
Liriomyza sativae, originally distributed in more than 30 countries and regions such as brazil, canada, usa, mexico, copa, panama and chile, has been spread to the Guangdong after first discovered in south of the sea in 1994; guangxi, yunnan, sichuan, shandong, beijing, tianjin and other 12 provinces and city autonomous regions. The host plant reaches more than 110 species, wherein the cucurbitaceae, solanaceae and leguminous plants are the most seriously damaged. The damage rate of the fertilizer to leaves can reach 10% -80%, so that the yield of melons and vegetables is reduced, the quality of the melons and the vegetables is reduced, and even the melons and the vegetables are not harvested in severe cases. Because the Liriomyza sativae is short in generation period, the insect state is not regularly developed, the life style of larvae is hidden, the generation overlap is serious, the drug resistance is easy to generate, the host range of the Liriomyza sativae is larger and larger in China along with frequent transportation of a large number of vegetables and flowers, and no targeted natural enemies exist, so that the Liriomyza sativae can be effectively controlled, and the problem needs to be urgently solved by researchers in the industry is very serious.
Disclosure of Invention
The invention aims to provide an insecticidal composition for controlling the oriental fruit liriomyza sativae and a control method.
The technical scheme of the invention is as follows:
an insecticidal composition for preventing and treating the American liriomyza sativae comprises pyriproxyfen, cyromazine, an auxiliary agent and other excipients, and is prepared into a suspending agent, wherein the weight ratio of the pyriproxyfen to the cyromazine is 1:3.
The content of active ingredients of the pyriproxyfen and the cyromazine is 10 to 50 percent, and the content of the preferred active ingredients is 40 percent or 400 g/L.
The further control method is characterized in that the pesticide is applied at the initial stage of emergence of the Eichhornia crassipes and Liriomyza sativae, the using amount of the effective ingredients of the pesticide composition is 90-150 g/hectare, and the preferable scheme is that the using amount of the effective ingredients is 120-150 g/hectare.
Furthermore, the auxiliary agent and the excipient are selected from one or more of dispersing agent, wetting agent, antifreezing agent, preservative, antifoaming agent, pH regulator, thickening agent and water.
The dispersing agent is selected from one or more of fatty alcohol polyoxyethylene ether phosphate, naphthalene sulfonic acid formaldehyde condensation product sodium salt block copolymer, comb-type polycarboxylate, sodium polycarboxylate and lignosulfonate; the wetting agent is selected from one or more of fatty alcohol-polyoxyethylene ether, alkyl glycoside and fatty alcohol-polyoxyethylene ether sodium sulfonate; the antifreezing agent is selected from one or more of ethylene glycol, propylene glycol, glycerol and urea; the preservative is sodium benzoate; the defoaming agent is a silicone defoaming agent; the pH regulator is selected from one or more of glacial acetic acid, citric acid and triethanolamine; the thickening agent is selected from one or more of xanthan gum, magnesium aluminum silicate and white carbon black.
Further, the preparation method of the insecticidal composition comprises the steps of firstly putting the auxiliary agent, the excipient, the active ingredient raw pesticide and water into a stirring tank, shearing at high speed, and fully dispersing to form initial dispersion liquid; conveying the mixture to a sand mill through a diaphragm pump for crushing, adjusting the feeding speed of the sand mill, and confirming that the granularity meets the requirement; and finally, conveying the slurry into a preparation kettle, adding a thickening agent and a defoaming agent, adjusting the viscosity of the material, and sampling for quality detection to obtain a finished product.
The insecticidal composition comprises the following components in percentage by weight when being prepared into a suspending agent: 2.5 to 12.5 percent of pyriproxyfen, 7.5 to 37.5 percent of cyromazine, 1 to 10 percent of dispersant, 1 to 10 percent of wetting agent, 0.01 to 2 percent of defoaming agent, 0.2 to 2 percent of thickening agent, 0 to 10 percent of antifreezing agent, 0 to 1 percent of preservative, 0 to 2 percent of PH regulator and the balance of water.
The suspending agent of the invention has the main technical indexes that:
Figure BDA0003639430950000031
compared with the prior art, the insecticidal composition provided by the invention has the following beneficial effects: (1) Compared with a single agent, the composition has obvious synergy on the glehnia littoralis and obviously improves the control effect; (2) The pesticide has low toxicity and high efficiency, reduces the dosage of the pesticide, reduces the residual quantity of the pesticide on crops, and has short safe interval period; (3) both fast and long acting.
Detailed Description
The present invention is further illustrated by the following examples, which are not intended to limit the scope of the present invention.
Firstly, adding the auxiliary agent, the excipient, the pyriproxyfen, the cyromazine and the water into a stirring tank, shearing at a high speed, and forming a primary dispersion liquid after full dispersion; conveying the mixture to a sand mill through a diaphragm pump for crushing, adjusting the feeding speed of the sand mill, and confirming that the granularity meets the requirement; and finally, conveying the slurry into a preparation kettle, adding a thickening agent and a defoaming agent, adjusting the viscosity of the material, and sampling for quality detection to obtain a finished product.
Application embodiment 1
EXAMPLE 1 pyriproxyfen-cyromazine suspension 400 g/l
9.11 percent of 98 percent of pyriproxyfen technical, 27.33 percent of 98 percent of cyromazine technical, 3 percent of naphthalenesulfonic acid formaldehyde condensation product sodium salt block copolymer, 4 percent of fatty alcohol polyoxyethylene ether, 0.2 percent of silicone defoamer, 1 percent of magnesium aluminum silicate, 2 percent of glycerol and 100 percent of water are added to prepare 400 g/L pyriproxyfen cyromazine suspending agent.
Example 2 pyriproxyfen-cyromazine suspension 400 g/l
9.11 percent of 98 percent pyriproxyfen technical, 27.33 percent of 98 percent cyromazine technical, 6 percent of comb-type polycarboxylate, 5 percent of alkyl glucoside, 0.5 percent of silicone compound, 0.3 percent of xanthan gum, 5 percent of urea, 0.2 percent of triethanolamine and 100 percent of water are added to prepare 400 g/L pyriproxyfen-cyromazine suspending agent.
Example 3 pyriproxyfen-cyromazine suspension 400 g/l
9.11 percent of 98 percent of pyriproxyfen technical, 27.33 percent of 98 percent of cyromazine technical, 3 percent of lignosulfonate, 3 percent of sodium polycarboxylate, 4 percent of fatty alcohol polyoxyethylene ether sodium sulfonate, 1 percent of silicone defoamer, 0.3 percent of magnesium aluminum silicate, 0.2 percent of xanthan gum, 4 percent of glycol, 0.5 percent of sodium benzoate and water added to 100 percent to prepare 400 g/L of pyriproxyfen-cyromazine suspending agent.
Example 4% pyriproxyfen-cyromazine suspension
10.02 percent of 98 percent of pyriproxyfen technical, 30.6 percent of 98 percent of cyromazine technical, 6 percent of naphthalenesulfonic acid formaldehyde condensation product sodium salt block copolymer, 2 percent of alkyl glycoside, 5 percent of fatty alcohol-polyoxyethylene ether, 0.4 percent of silicone defoamer, 1.5 percent of sodium benzoate, 4 percent of glycol, 0.2 percent of triethanolamine, 1.5 percent of white carbon black and water added to 100 percent to prepare the 40 percent pyriproxyfen-cyromazine suspending agent.
Example 5 50% pyriproxyfen-cyromazine suspension
12.75 percent of 98 percent pyriproxyfen technical, 4736 percent of cyromazine technical, 38.27 percent, 6 percent of lignosulfonate, 6 percent of alkyl glycoside, 0.4 percent of silicone defoamer, 0.1 percent of magnesium aluminum silicate, 3 percent of urea and water are added to 100 percent to prepare the 50 percent pyriproxyfen-cyromazine suspending agent.
Example 6% pyriproxyfen-cyromazine suspension
2.55% of 98% pyriproxyfen technical material, 7.65% of 98% cyromazine technical material, 3% of fatty alcohol-polyoxyethylene ether phosphate, 3% of fatty alcohol-polyoxyethylene ether sodium sulfonate, 0.2% of silicone defoamer, 0.7% of xanthan gum, 4% of tricarballyl, 0.2% of sodium benzoate and water added to 100% to prepare the 10% pyriproxyfen-cyromazine suspending agent.
Application example two:
indoor joint toxicity determination experiment 1 test purpose of cyromazine, pyriproxyfen and mixed p-jigua liriomyza sativae
Liriomyza sativae Blanchard belongs to quarantine pests in China, and mainly damages vegetables such as eggplants, tomatoes, potatoes, hot peppers, melons, beans and the like. The method is entrusted by Shaanxi Meibang pharmaceutical industry group member company Limited, takes liriomyza sativae 2-instar larvae as a test object, adopts an insect soaking method (with 2-instar larva blades), screens the optimal mixture ratio of pyriproxyfen and cyromazine for use in a mixing manner, provides a basis for enterprises to develop and control the registration of the pesticide and the pesticide for the liriomyza sativae, and reports the test result as follows.
2 design of the experiment
2.1 reagents
2.1.1 test Agents
98% Pyriproxyfen (Pyriproxyfen) raw drug provided by Shaanxi, meibang, pharmaceutical industry group, inc.;
98% Cyromazine is supplied by Shaanxi Meibang pharmaceutical industry group GmbH.
2.1.2 other reagents
Solvent: n, N-dimethylformamide, tianjin katong chemical reagent ltd.
Emulsifier: tween 80, tianjinkatong chemical reagents ltd.
2.2 test treatment
2.2.1 dose setting
The pyriproxyfen used as a test medicament is prepared into 1.0 multiplied by 10 by taking N, N-dimethylformamide as a solvent 4 Preparing the test medicament cyromazine original drug into 1.0 multiplied by 10 by mg/L mother liquor by using distilled water as a solvent 4 And (5) putting the mg/L mother liquor in a refrigerator for later use. The mother liquor was diluted again with an aqueous solution containing 0.1% tween 80 on the basis of a pilot test, with 5 concentrations designed for each treatment. Based on the pre-test, the proportion of the active ingredients mixed by the two is 1:5, 1:4, 1:3, 1:2 and 1:1, and 1.0 x 10 is respectively prepared 4 And (5) putting the mg/L mother liquor in a refrigerator for later use. The mother liquor was then diluted with an aqueous solution containing 0.1% tween 80, each treatment designed for 5 concentrations, each concentration treated 120 heads of 2-instar (5 d, greater than 2cm latent) liriomyza sativae larvae in 4 replicates, with equal amounts of N, N-dimethylformamide and 0.1% tween 80 aqueous solution without drug as blank.
Pyriproxyfen (a): 24. 12, 6, 3, 1.5mg/L
Cyromazine (B): 80. 40, 20, 10, 5mg/L
A:B(1:5)：60、30、15、7.5、3.75mg/L
A:B(1:4)：48、24、12、6、3mg/L
A:B(1:3)：40、20、10、5、2.5mg/L
A:B(1:2)：38、19、9.5、4.75、2.375mg/L
A:B(1:1)：34、17、8.5、4.25、2.125mg/L
2.2.2 test replicates
The test agent was treated for 4 replicates per concentration, each replicate being no less than 30 larvae of 2-instar (greater than 2cm latent) liriomyza sativae, and an equivalent amount of N, N-dimethylformamide and 0.1% Tween 80 in water without the agent as a blank control
3.3 modes of treatment
3.3.1 treatment time and number of treatments
The test adopts a first medicament to dip the leaves with 2-year larvae, and the test insects are healthy and consistent 2-year (with the latent track of more than 2 cm) liriomyza sativae larvae.
3.3.2 methods of administration
The test was conducted by the insect-soaking method (with 2-instar larval leaves).
4 test method
4.1 test protocol
And (3) an immersion method. Referring to part 7 of agricultural industry standard ' pesticide indoor bioassay test criteria ' of the people's republic of China: combined action assay of compounding (NY/T1154.7-2006) and part 6: insecticidal Activity test the insect-immersion method (NY/T1154.6-2006) with modifications.
4.2 treatment with pharmaceutical Agents
Clamping the leaves attached with 2-instar larvae of liriomyza sativae with a pair of tweezers, soaking in the prepared liquid medicine for 10s, taking out, naturally drying, adding clear water into absorbent cotton for moisturizing, and marking 30 lanes. When dipping, the control is dipped first and the dipping is carried out from low concentration to high concentration in sequence. Then covering each processing blade with a freshness protection package which is pricked by a needle and is provided with a large number of breathing holes, clamping the mouth with a small clamp, and placing the processing blade in an artificial constant-temperature insect breeding room with the temperature (28 +/-1 ℃), the illumination (the light-dark ratio is 16: 8) and the humidity (60% -70%).
5 data investigation and statistical analysis
5.1 investigation time and method
After 96h of treatment, the quantity of physicochemical pupae at each part is checked. Larval death criteria: the people without pupation die.
5.2 statistical analysis of data
The blank control mortality rate is less than 5% without correction; the blank control mortality rate is 5% -20%, and the corrected mortality rate of each treatment is calculated by using an Abbott formula; the blank control mortality rate is more than 20%, and the test needs to be redone.
DPS data processing software is adopted to calculate test results, toxicity regression equations and LC50, LC90 and 95% confidence limits of two single agents and five ratios of test agents are respectively obtained, and original data of all processing repetitions are recorded.
Calculating co-toxicity coefficients (CTC) according to a Sun Yunpei method, and evaluating the synergistic effect of the mixed medicaments according to the co-toxicity coefficients (CTC), namely that CTC is less than or equal to 80 and is antagonistic action, 80-straw CTC-straw cover-type 120 is additive action, and CTC is more than or equal to 120 and is synergistic action. The corrected mortality is calculated according to the formulae (1) and (2), and the co-toxicity coefficient (CTC) is calculated according to the formulae (3), (4) and (5).
Formula (1): p = (K/N) × 100
In the formula: p is mortality (%);
k is the number of dead insects (head);
n is the total number of treated worms (heads).
Formula (2): p 1 ＝[(P t -P 0 )/(1-P 0 )]×100
In the formula: p1 is corrected mortality (%);
pt is treatment mortality (%);
p0 is the blank treatment mortality (%).
Formula (3): ATI = (S/M) × 100
In the formula: ATI is actually measured toxicity index of the mixed agent;
s is LC50 (mg/L) of a standard medicament;
m is LC50 (mg/L) of the mixture;
formula (4): TTI = TI A ×P A +TI B ×P B
In the formula: TTI is the theoretical virulence index of the mixture;
TIA is the virulence index of agent a;
PA is the percentage content (%) of the A medicament in the mixture;
TIB is the virulence index of the B agent;
PB is the percentage (%) of the B medicament in the mixture.
Formula (5): CTC = (ATI/TTI). Times.100
In the formula: CTC is co-toxicity coefficient;
ATI is actually measured toxicity index of the mixed agent;
TTI is the theoretical virulence index of the mixture.
6 results of the experiment
TABLE 1 toxicity test results of cyromazine and pyriproxyfen in different ratios for Liriomyza sativae
Figure BDA0003639430950000101
As can be seen from Table 1, the test medicament pyriproxyfen has better toxicity to 2-instar larvae of the melon-type liriomyza sativae, the LC50 value is 6.0819mg/L, and the LC90 value is 53.8953mg/L; the cyromazine also has high toxicity, the LC50 value is 20.1572mg/L, and the LC90 value is 173.4801mg/L; the toxicity (LC 50) of the two medicaments mixed in different proportions to 2-instar larvae of the Liriomyza sativae is 15.0153, 12.0172, 9.9654, 9.6730 and 8.4804mg/L respectively, and the cotoxicity coefficient CTC reaches 96.88, 114.66, 128.14, 117.64 and 110.19 respectively. The result shows that the CTC of the pyriproxyfen and the cyromazine is more than 120 when the proportion is 1:3 in the experimental design, and the synergy is obvious.
Application example three: example 1 field efficacy test for controlling Eichhornia Liriomyza
Purpose of the test
The control effect and safety of the 400 g/L pyriproxyfen-cyromazine suspending agent produced by Shaanxi Meibang pharmaceutical industry group GmbH on the liriomyza sativae are verified, the field dosage and the application technology are determined, and a scientific basis is provided for pesticide registration.
2 basis of experiment
Experimental criteria for pesticide field efficacy (second) section 66: the pesticide can be used for preventing and treating vegetable leaf miner (GB/T17980.66-2004).
3 site of experiment
The test is arranged in the urban region of Changsha city, hunan province.
Selection of test subjects, crops and varieties
Test subjects: liriomyza sativae Blanchard; and (3) test crops: the Jiegua is a dark green small-section variety.
5 test design and arrangement
5.1 dosage and numbering of drugs
TABLE 2 test design of test agents
Figure BDA0003639430950000111
5.2 application periods and methods
The pesticide is applied at the early stage of generation of the Jieguua liriomyza, leaves of fresh wormholes are more when the pesticide is applied, and the Jieguua is in the flowering and fruiting period and grows uniformly.
According to the design dosage of the test, accurately weighing or transferring each medicament required by the treatment into a sample bottle, marking, putting into a sample transport box, and carrying to a test place for testing (in order to ensure uniform application, 10% more medicament is taken for each treatment than the design dosage).
Respectively preparing the prepared processed samples into corresponding test solutions by a secondary dilution method; and (3) uniformly spraying the water solution by a spraying method in a cell-by-cell manner according to the sequence of blank control (clear water), the tested object, the control object and low dose to high dose, and paying attention to uniform spraying. And after the medicine application of each cell is finished, collecting the residual liquid medicine and recording the residual liquid medicine amount.
5.3 application time and frequency
The medicine is applied 1 time at 07 days 06 months in 2021.
5.4 capacity of use
50 liters of pesticide spraying liquid is sprayed per mu, and 750 liters of pesticide spraying liquid is sprayed per hectare.
5.5 investigation time and number of surveys
The population base number of the worms was investigated before the administration of the drug, and the number of live worms was investigated 3, 7, and 10 days after the administration of the drug.
5.6 method for calculating drug efficacy
Figure BDA0003639430950000121
Figure BDA0003639430950000122
6 results of the experiment
TABLE 3 example 1 results of field efficacy test for controlling Eichhornia crassipes Liriomyza sativae
Figure BDA0003639430950000123
As can be seen from Table 3, the pyriproxyfen-cyromazine suspension of example 1, 400 g/l, was administered at the initial onset of the development of the Eichhornia Eichhornii Nervilia and had a good control effect against the Eichhornia Eichhornii Nervilia at the dose administered. After 3 days, the control effects of the 400 g/L pyriproxyfen-cyromazine suspending agent with the use amount of 90, 120 and 150 g/ha of the effective components are 52.85%, 68.47% and 75.84% respectively, and the control effect difference among the treatments of the tested substances is very obvious; the control effect of the low-dose treatment of the test substance is extremely lower than that of the control substance which is treated by 75 percent of cyromazine wettable powder with 168.75 g/hectare of active ingredient; the control effect of the dosage treatment in the tested substance is equivalent to that of the control substance of 168.75 g/ha of the effective component of the wettable powder of 75 percent of cyromazine; the control effect of the high-dose treatment of the tested substance is obviously higher than that of the 75 percent of cyromazine wettable powder of a reference substance by using 168.75 g/ha of the effective component; the control effect of each treatment of the tested substance is remarkably superior to that of a contrast substance of 100 g/L pyriproxyfen emulsifiable concentrate of which the using amount of the active ingredients is 90 g/hectare.
After 7 days of drug administration, the control effects of low, medium and high dose treatment of the tested object are 69.76%, 78.82% and 84.16% respectively, the control effects are obviously improved, and the control effect difference among the treatment of the tested object is very obvious; the control effect of the tested object treated by high dose is not obviously different from the control object of 168.75 g/ha of the effective component of 75% of cyromazine wettable powder, and the control effect of each treatment of the tested object is obviously better than the control effect of 90 g/ha of the effective component of 100 g/L pyriproxyfen emulsifiable solution of the control object.
After 10 days of the drug administration, the control effects of the low, medium and high dose treatment of the tested object are respectively 74.76%, 84.98% and 88.20%, the control effects reach higher level, the persistence is better, and the control effect difference among the treatment of the tested object is obvious or extremely obvious; the control effect of the dosage treatment in the tested substance has no significant difference with the dosage of 168.75 g/hectare of the effective component of the 75 percent cyromazine wettable powder of the contrast substance; the control effect of the test object with high dose is obviously or extremely obviously better than that of two controls; the control effect of each treatment of the tested substance is remarkably superior to that of a contrast substance of 100 g/L pyriproxyfen emulsifiable concentrate of which the using amount of the active ingredients is 90 g/hectare.
Application example four: example 2 field efficacy test purpose, experimental basis, medicament design and dosage, efficacy calculation method for controlling the Eichhornia crassipes Liriomyza are the same as the third application example.
1 site of experiment
The test was arranged in the white cloud region of Guangzhou, guangdong province.
Selection of test subjects, crops and varieties
Test subjects: liriomyza sativae Blanchard; and (3) test crops: the Jiegua is a kind of Corsaine.
3 time and frequency of application
The application was carried out 1 time in the early onset of cyrtominex americanus development at 6/11 days 2021 (16.
4 capacity of use
The water consumption for the test is as follows: 675 l/ha.
5 investigation time and number of surveys
The population base was investigated before the administration (11/6/2021), and the number of the study was 4 in total 3 days (14/6/2021), 7 days (18/6/2021), and 10 days (21/6/2021) after the administration.
6 results of the experiment
TABLE 4 example 2 field efficacy test results for controlling Oncomelania lugens Liriomyza sativae
Figure BDA0003639430950000141
Note: the control (%) in the table is the average value of each repetition; the same letters after the same column of data are not significant differences. The variance analysis method comprises the following steps: DPS 7.05 Duncan's new repolarization method (DMRT) was used.
As can be seen from Table 4, the pyriproxyfen and cyromazine suspending agent of 400 g/l in example 2 has good control effect on the hydrastis canadensis of the jigua at 20 ml/mu, the control effect of the high dose in the test medicament is higher than 71% 3 days after the application, and the control effect of the high dose in the test medicament is still kept above 83% 10 days after the application. Compared with a single control agent, the control effect has obvious difference. Has no adverse effect on target crops in the application range of the test.
Application example five: example 3 field efficacy test for controlling Eichhornia Liriomyza
The purpose of the test, the experimental basis, the design and dosage of the medicament and the calculation method of the drug effect are the same as the third application example.
1 site of experiment
The test is arranged in Changcheng town of Chengmei county, hainan province.
Selection of test subjects, crops and varieties
Test subjects: liriomyza sativae Blanchard; and (3) test crops: jiebao No. 5 is a kind of Jibao.
3 time and frequency of application
The medicine is administered 1 time every 21 days 12 months in 2020, 1 time in total.
4 capacity of use
50 liters of pesticide spraying liquid is sprayed per mu, and 750 liters of pesticide spraying liquid is sprayed per hectare.
5 investigation time and number of surveys
The total number of examinations was 4, and 1 was performed before drug administration (12 months and 21 days), 3 days after drug administration (12 months and 24 days), 7 days after drug administration (12 months and 28 days), and 10 days after drug administration (12 months and 31 days).
6 results of the experiment
TABLE 5 EXAMPLE 3 field efficacy test results for the control of Eichhornia Liriomyza
Figure BDA0003639430950000151
Figure BDA0003639430950000161
As can be seen from Table 5, the pyriproxyfen-cyromazine suspending agent in example 3 has a good control effect on the melon-saving pest Liriomyza sativae, the highest control effect of the 10 th day after application reaches 80.04%, and the suspending agent is safe to the melon within the dosage range in the test, has no phytotoxicity, and can be popularized and applied in production.
Application example six: example 4 field efficacy test for controlling Eichhornia Liriomyza
The purpose of the test, the experimental basis, the design and dosage of the medicament and the calculation method of the drug effect are the same as the third application example.
1 site of experiment
The test was arranged in the Guangzhou city, guangdong province.
Selection of test subjects, crops and varieties
Test subjects: liriomyza sativae Blanchard; test crops: jiegu, the variety is Xia Guan No. one.
3 time and frequency of application
The pesticide is applied 1 time at the initial stage of generation of the Everruca indica Liriomyza, 21 days 6 and 21 months in 2020.
4 capacity of use
50 liters of pesticide spraying liquid is sprayed per mu, and 750 liters of pesticide spraying liquid is sprayed per hectare.
5 investigation time and number of surveys
The base of the study was determined before administration (6/21/2020), and the study was performed 3 days (24/6/2020), 7 days (28/6/2020), and 10 days (1/7/2020), for a total of 4 times.
6 results of the experiment
TABLE 6 EXAMPLE 4 field efficacy test results for the control of Eichhornia Liriomyza
Figure BDA0003639430950000171
As can be seen from table 6, the 40% pyriproxyfen-cyromazine suspending agent in the example 4 has good control effect on the cucurbita maxima livida, especially the control effect of 20 ml/mu and 25 ml/mu of the 40% pyriproxyfen-cyromazine suspending agent reaches more than 90% 7 days after the application, the control effect of more than 82% is still achieved 10 days after the application, and the suspending agent has certain persistence. The control effect is obviously better than that of a single control agent.

Claims (6)

1. An insecticidal composition for preventing and controlling oriental fruit liriomyza sativae and a prevention and control method thereof are characterized in that: the insecticidal composition comprises pyriproxyfen, cyromazine, an assistant and other excipients, and is prepared into a suspending agent, wherein the weight ratio of the pyriproxyfen to the cyromazine is 1:3.
2. The insecticidal composition and the control method according to claim 1, characterized in that: the content of the effective active ingredients of the pyriproxyfen and the cyromazine is 10 to 50 percent.
3. The pesticidal composition and the control method according to claim 2, characterized in that: the content of the effective active ingredients of the pyriproxyfen and the cyromazine is 40 percent or 400 grams/liter.
4. The insecticidal composition and the control method according to claim 1, characterized in that: the auxiliary agent and the excipient are selected from one or more of dispersing agent, wetting agent, antifreezing agent, preservative, defoaming agent, pH regulator, thickening agent and water.
5. The insecticidal composition and the control method according to claim 1, characterized in that: the pesticide is applied at the initial stage of generation of the oriental fruit liriomyza sativae, and the using amount of the effective ingredients of the pesticide composition is 90 to 150 g/hectare.
6. The insecticidal composition and the control method according to claim 5, characterized in that: the dosage of the active ingredients of the insecticidal composition is 120 to 150 g/hectare.
CN202210515750.7A 2022-05-11 2022-05-11 Insecticidal composition for preventing and treating oriental-melon liriomyza sativae and prevention and treatment method Pending CN115281198A (en)

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