CN116548447A - Application method of composition for preventing and controlling tea leafhoppers of tea tree - Google Patents
Application method of composition for preventing and controlling tea leafhoppers of tea tree Download PDFInfo
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- CN116548447A CN116548447A CN202211232646.3A CN202211232646A CN116548447A CN 116548447 A CN116548447 A CN 116548447A CN 202211232646 A CN202211232646 A CN 202211232646A CN 116548447 A CN116548447 A CN 116548447A
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- China
- Prior art keywords
- tea
- leafhoppers
- flonicamid
- tolfenpyrad
- test
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- WPALTCMYPARVNV-UHFFFAOYSA-N tolfenpyrad Chemical compound CCC1=NN(C)C(C(=O)NCC=2C=CC(OC=3C=CC(C)=CC=3)=CC=2)=C1Cl WPALTCMYPARVNV-UHFFFAOYSA-N 0.000 claims abstract description 38
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Classifications
-
- 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
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G13/00—Protecting plants
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G7/00—Botany in general
- A01G7/06—Treatment of growing trees or plants, e.g. for preventing decay of wood, for tingeing flowers or wood, for prolonging the life of plants
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N25/00—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests
- A01N25/02—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests containing liquids as carriers, diluents or solvents
- A01N25/04—Dispersions, emulsions, suspoemulsions, suspension concentrates or gels
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N43/00—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds
- A01N43/48—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with two nitrogen atoms as the only ring hetero atoms
- A01N43/56—1,2-Diazoles; Hydrogenated 1,2-diazoles
-
- 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
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/30—Against vector-borne diseases, e.g. mosquito-borne, fly-borne, tick-borne or waterborne diseases whose impact is exacerbated by climate change
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- Life Sciences & Earth Sciences (AREA)
- Environmental Sciences (AREA)
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Wood Science & Technology (AREA)
- Plant Pathology (AREA)
- Pest Control & Pesticides (AREA)
- Zoology (AREA)
- Dentistry (AREA)
- Agronomy & Crop Science (AREA)
- Chemical & Material Sciences (AREA)
- Toxicology (AREA)
- Biodiversity & Conservation Biology (AREA)
- Ecology (AREA)
- Forests & Forestry (AREA)
- Dispersion Chemistry (AREA)
- Insects & Arthropods (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Botany (AREA)
- Agricultural Chemicals And Associated Chemicals (AREA)
Abstract
The invention relates to the technical field of pesticides, and discloses an application method of a composition for preventing and controlling tea leafhoppers of tea trees. The application method is to prepare the pesticide composition into a suspending agent according to a certain proportion, and spray the suspending agent according to a certain dosage, so as to prevent and treat tea leafhoppers of tea trees. The composition consists of flonicamid, tolfenpyrad and auxiliary agent; the ratio of flonicamid to tolfenpyrad is 3:2-2:3. The application method for controlling tea leafhoppers can effectively control pests, improves the effect of controlling tea leafhoppers, is safe to crops and natural enemies, and has long lasting period and small residue.
Description
Technical Field
The invention belongs to the technical field of pesticides, and particularly relates to an application method of a composition for preventing and controlling tea leafhoppers of tea trees.
Background
Flonicamid is an insect antifeedant and insects antifeedant and die after feeding. Mainly prevents and cures hemiptera pests such as aphids, whiteflies and the like, and has insecticidal effect on thrips, greenhouse white flies, leafhoppers, plant hoppers and white scale insects.
The tolfenpyrad is a novel pyrazole heterocyclic insecticidal acaricide, has a contact insecticidal effect, has a good effect on lepidoptera pests and the like, has a long lasting period, and can inhibit the pests from feeding.
Tea leafhoppers, tea leafhoppers (Empoasca pirisuga Matumura), hemiptera, cicadellidae, commonly known as floating dust seeds and She Tiaochong, occur generally in tea provinces and autonomous areas throughout the country.
The leafhoppers are classified into two kinds of tea leafhoppers and pseudoeye leafhoppers. The tea leafhopper is mainly damaged, and is one of main tea pests. The insects occur for about 8-12 generations in one year, and alternate in generation. The tea is seriously damaged in summer and autumn, the tea tree bud She Quansu, the hardening, the leaf tip and the leaf margin are scorched and are slow in growth, and the tea yield and the quality are greatly affected.
The generation of leafhoppers occurs for 9-11 generations a year, and most of the leafhoppers overwintere tea trees or winter crops (beans), weeds and other plants, and the leafhoppers can overwinter in various insect states in south China. In the next early spring, adults begin to eat and supplement nutrition, and the tea trees begin to spawn and reproduce after sprouting. The bud tips of the tea trees stop growing in the late autumn and early winter, the adults also stop spawning, and the winter is entered. Adults have the habit of successive spawning and batch spawning, and especially overwintering adults can have spawning periods as long as 1 month. Because the generation overlap is serious, the reproductive capacity is strong, the ecological adaptability is strong, the drug resistance is strong, the chemical pesticide is used for preventing and curing for years, the pests quickly generate extremely high level resistance to various pesticides, the tea farm technology level is low, the food safety is conscious, the scientific pest and disease comprehensive treatment technology is lacking, in order to achieve the purpose of preventing and curing the pests, the natural enemies die greatly along with the increase of the pesticide consumption by increasing the pesticide consumption, the application frequency or the means of using high-toxic pesticides, the ecological environment of the tea garden is seriously damaged, and the tea farm pesticide is seriously polluted. How to provide a product with low toxicity, good control effect and obvious effect on resisting pests is a problem to be solved by the person skilled in the art.
Through continuous innovative researches, the applicant finds that the two kinds of flonicamid and tolfenpyrad with completely different action mechanisms are mixed, so that the purpose of effectively preventing and controlling pests can be achieved through combined action of the two kinds of flonicamid and tolfenpyrad, and meanwhile, the dosage of the medicament in fields is reduced, and the pesticide has quick response and lasting effect especially for resistant pests. On the other hand, the residue is small, the safety interval period is short, the pollution of the medicament to the environment is reduced, and the medicament is safe to natural enemies.
Disclosure of Invention
The invention aims to provide an application method of the composition for preventing and controlling tea leafhoppers, which can effectively prevent and control tea leafhoppers, has quick acting and lasting effects, is safe to natural enemies, is environment-friendly and effectively reduces application cost.
The technical scheme of the invention is as follows:
an application method of a composition for preventing and controlling tea leafhoppers of tea trees is characterized by comprising the following steps: the application method is that flonicamid, tolfenpyrad and auxiliary agent are prepared into suspending agent according to a certain proportion, and the suspending agent is used for preventing and controlling tea leafhoppers.
Further, the ratio of flonicamid to tolfenpyrad is 3:2-2:3, and the preferable ratio is 18:17.
Further, the composition has an effective active ingredient content of 100 to 500 g/l, preferably 350 g/l.
Further, the composition is used for preventing and controlling tea leafhoppers, and the dosage of the effective components is 52.5-105 g/ha, preferably 78.75-105 g/ha.
Further, the application method of the composition for controlling tea leafhoppers is that the water consumption is 450-750 liters/hectare, and the preferable water consumption is 675-750 liters/hectare.
The composition comprises the following components in percentage by weight when being prepared into a suspending agent: 40-300 g/l flonicamid, 40-300 g/l tolfenpyrad, 10-100 g/l dispersant, 10-100 g/l wetting agent, 1-20 g/l defoamer, 2-30 g/l thickener, 0-100 g/l antifreeze, 0-20 g/l preservative and the balance of water.
Compared with the prior art, the composition provided by the invention has the following beneficial effects: (1) Compared with a single dose, the composition has obvious synergism on tea leafhoppers of tea trees, and obviously improves the control effect; (2) The pesticide is low in toxicity and high in efficiency, the pesticide dosage is reduced, the residual quantity of the pesticide on crops is reduced, and the safety interval period is short; (3) has quick and long-acting effects; (4) safe to natural enemies.
Detailed Description
The present invention will be further illustrated with reference to examples, but the present invention is not limited thereto.
Application example one
Example 1 350 g/l flonicamid-tolfenpyrad suspension
187.50 g of 96% flonicamid technical, 173.47 g of 98% tolfenpyrad technical, 25 g of EO-PO block copolymer, 15 g of fatty alcohol polyoxyethylene ether, 50 g of glycerol, 2 g of xanthan gum, 2 g of magnesium aluminum silicate, 3 g of organic silicone defoamer, 4g of sodium benzoate and 1000 g of water are added to prepare 350 g/L flonicamid-tolfenpyrad suspending agent.
Example 2 350 g/l flonicamid-tolfenpyrad suspension
187.50 g of 96% flonicamid technical, 173.47 g of 98% tolfenpyrad technical, 20 g of lignosulfonate, 10 g of polycarboxylate, 20 g of trisiloxane polyoxyethylene ether, 40 g of glycerol, 3 g of carboxymethyl cellulose, 3 g of white carbon black, 3 g of organic silicone defoamer and 1000 g of water are added to prepare 350 g/L flonicamid-tolfenpyrad suspending agent.
EXAMPLE 3 500 g/L flonicamid-tolfenpyrad suspension
312.50 g of 96% flonicamid technical, 204.08 g of 98% tolfenpyrad technical, 20 g of alkyl naphthalene formaldehyde condensate sulfonate, 15 g of polyoxyethylene polyoxypropylene ether block copolymer, 15 g of alkylphenol polyoxyethylene ether formaldehyde condensate sulfate, 25 g of sodium dodecyl sulfate, 30 g of urea, 3 g of magnesium aluminum silicate, 3 g of C10-20 saturated fatty acid compound, 1 g of triethanolamine and 1000 g of water are added to prepare 500 g/L flonicamid-tolfenpyrad suspending agent.
Example 4 150 g/l flonicamid-tolfenpyrad suspension
52.08 g of 96% flonicamid technical, 102.04 g of 98% tolfenpyrad technical, 20 g of nonylphenol polyoxyethylene ether phosphate, 15 g of triphenyl ethylphenol polyoxypropylene polyoxyethylene block polymer, 60 g of sorbitol, 4g of polyvinyl alcohol, 0.5 g of sodium benzoate, 3 g of C8-10 fatty alcohol defoamer and water to 1000 g, thus preparing 150 g/L flonicamid-tolfenpyrad suspending agent.
Implementation example II:
indoor combined toxicity determination experiment of flonicamid, tolfenpyrad and mixed tea leafhopper
1 purpose of test
The toxicity of flonicamid and tolfenpyrad and different mixing combinations thereof to tea leafhoppers is measured indoors, synergism is evaluated, suitability of the two is clear, and scientific basis is provided for research and development of flonicamid and tolfenpyrad mixture.
2 experimental conditions
2.1 test targets
Tea leafhoppers (Empoasca pirisuga Matumura) were harvested from the field and 3-year nymphs of 2 generations were bred with fresh shoots of tea tree in the laboratory.
2. Culture conditions
The culture conditions of the tested target and the tested target are that the temperature is 25+/-1 ℃, the relative humidity is 60% -80%, and the illumination period is L:D= (16:8) h.
3 test design
3.1 test Agents
Flonicamid (floxamid) 96% active ingredient and tolfenpyrad (tolfenpyrad) 98% active ingredient.
3.2 pharmaceutical formulation
0.0209g of flonicamid 96% crude drug is weighed, dissolved by 2mL of DMF, added with 0.2mL of Tween80 emulsifier, stirred uniformly, added with clear water to 200mL to prepare 100mg/L mother liquor, 40mL of mother liquor is added into 60mL of water containing 0.1% of Tween80 emulsifier to prepare 40mg/L test solution, and the test solution is diluted into 20, 10, 5, 2.5 and 1.25mg/L according to the proportion of 2 times, and 6 concentrations are tested.
0.0204g of tolfenpyrad 98% original drug is weighed, dissolved by 2mL of DMF, added with 0.2mL of Tween80 emulsifier, stirred uniformly, added with clear water to 200mL to prepare 100mg/L mother liquor, 40mL of mother liquor is added into 60mL of water containing 0.1% of Tween80 emulsifier to prepare 40mg/L test solution, and the test solution is diluted into 20, 10, 5, 2.5 and 1.25mg/L according to a proportion of 2 times, and 6 concentrations are tested.
According to the proportion of flonicamid to tolfenpyrad 18:7, 18:12, 18:17, 18:22 and 18:27, respectively measuring 28.8, 24, 20.57, 18 and 16mL of 100mg/L flonicamid mother liquor, respectively measuring 11.2, 16, 19.43, 22 and 24mL of 100mg/L tolfenpyrad mother liquor, mixing the two, adding clear water to 100mL, preparing 40mg/L test solution, respectively diluting the test solution with water containing 0.1% Tween80 emulsifier according to the proportion of 2 times, and performing tests (specific concentration is shown in the attached table).
98mL of water containing 0.1% Tween80 emulsifier was added to a beaker containing 2mL of DMF as a blank.
4 test method
The dipping method is adopted by referring to the method in the pesticide indoor biological assay test standard NY/T1154.11-2008. Selecting 3 fresh tea tree shoots, soaking in the test liquid for 30 seconds, taking out, naturally airing, wrapping the bases of the shoots with wet absorbent cotton for moisturizing, sealing the absorbent cotton with preservative film, and placing in a glass test tube (phi 200 multiplied by 30 mm) for 4 times per concentration. Then, a writing brush is used for inoculating 3-year nymphs of tea lesser leafhoppers which are subjected to mild anesthesia treatment by diethyl ether, 15+/-2 heads of each tube are connected, and the mouth of each tube is sealed by white gauze. After the treatment, the glass is placed in an observation chamber.
5 data investigation and statistical analysis
5.1 investigation time and method
After 72 hours, the death condition of the test insects is checked and recorded, and the death judgment standard of the test insects is that the test insects are gently contacted by forceps and have no response, so that the test insects are dead.
5.2 method for evaluating synergy
And (3) solving the co-toxicity coefficient (CTC) of each compounding combination by adopting a Sun & Johnson (1960) co-toxicity coefficient method according to the indoor biological assay criterion NY/T1154.7-2006 of the pesticide. Generally, CTC.ltoreq.80 is antagonism, 80< CTC <120 is additive, CTC.ltoreq.120 is synergistic. The co-toxicity coefficient calculation formula is as follows:
drug combination Theory Toxicity Index (TTI) =toxicity index of agent a×percent (%) of agent a in the combination+toxicity index of agent b×percent (%)
6 experimental results
The toxicity measurement results of the flonicamid and tolfenpyrad mixed in the proportions of 18:7, 18:12, 18:17, 18:22 and 18:27 on tea leafhoppers are shown in Table 1. As can be seen from the table, the 5 proportions of flonicamid and tolfenpyrad show synergistic effect except 18:7, the LC50 values of the flonicamid and tolfenpyrad are 5.66, 5.57, 4.97, 5.38 and 5.80mg/L respectively, and the co-toxicity coefficients of the flonicamid and tolfenpyrad are 117.81, 123.81, 142.23, 133.91 and 126.09 respectively, wherein the synergistic effect of 18:17 is most remarkable.
TABLE 1 toxicity measurement results of tea leafhoppers mixed with flonicamid and tolfenpyrad
The indoor test result shows that the flonicamid and the tolfenpyrad are mixed according to the proportion of 18:12, 18:17, 18:22 and 18:27 to show synergistic effect on tea leafhoppers, wherein the synergistic effect of 18:17 is most obvious. Therefore, the optimal proportion of flonicamid and tolfenpyrad can be seen as 18:17 only from the synergistic toxicity comparison.
Application example three: example 1 field efficacy test for controlling tea leafhopper
1 purpose of test
The control effect of 350 g/L flonicamid-tolfenpyrad suspending agent developed by the applicant on tea tree leafhoppers and the safety of the tea trees are verified, the field use dosage and the application technology are defined, and a scientific basis is provided for pesticide registration.
2 basis of test
Pesticide registration field efficacy test quality management Specification (NY/T2885-2016) of agricultural industry Standard of the people's republic of China; pesticide field efficacy test criterion (II) (GB/T17980.56-2004).
3 experiment site
The test was arranged in the Hubei province Wu Xueshi Mei Chuanzhen.
4 selection of test subjects, crops and varieties
Test object: tea leafhoppers (Empoasca pirisuga);
test crop: the tea tree is green tea and has 5 years of age.
5 test design and arrangement
5.1 dosage and numbering of the medicament
TABLE 2 test design of reagents for test
5.2 times and times of application
Once in 2022, 6 and 17 days. Tea trees are in the summer piggyback growth period, and tea leafhoppers are in the nymph emergence period.
5.3 usage Capacity
The chemical solution is sprayed to each mu of the crops in 45 liters, and the liquid amount sprayed per hectare is 675 liters.
5.4 investigation time and times
When the morning dew was not dry, the number of nymphs on 30 shoot tips (3, 4 leaves of one bud) per cell was investigated randomly.
The number of insect population was investigated before treatment, and 1, 3 and 7 days after treatment were investigated respectively.
5.5 method for calculating efficacy
6 experimental results
TABLE 3 field control of tea leafhoppers on tea plant
TABLE 4 example 1 results of field efficacy test for controlling tea leafhoppers
The experimental results show that: the tested object 350 g/L flonicamid-tolfenpyrad suspending agent in the embodiment 1 has good quick acting performance on tea leafhoppers, and the prevention effect on tea leafhoppers is 80.62-87.58% after 1 day of the treatment of the tested object under the conditions of 10 mL/mu treatment, 15 mL/mu treatment and 20 mL/mu treatment; the control substance is treated by 25 mL/mu of flonicamid water dispersible granule, 40 mL/mu of 15% tolfenpyrad suspending agent and 15 mL/mu of 20% bifenthrin aqueous emulsion, and the prevention effect on tea leafhoppers is 75.04%, 75.89% and 77.32% respectively; the control effect of each dose of the tested object on tea leafhoppers is improved by 3 days after the drug, compared with 1 day after the drug, the control effect is 89.24-95.26%, the control object is 25 mL/mu of 20% flonicamid water dispersible granule, the control object is 15% tolfenpyrad suspending agent is 40 mL/mu of the control object, the control effect of 20% bifenthrin aqueous emulsion is 15 mL/mu of the control object on tea leafhoppers is 84.02%, 85.40% and 87.81% respectively (table 3 and table 4).
The efficacy of 350 g/L flonicamid-tolfenpyrad suspending agent for the tested object on tea leafhoppers of tea trees is excellent 7 days after the drug administration, the rate of reduction of insect mouths of the tea leafhoppers by each dose of the tested object is 90.37-95.64%, the efficacy is 91.11-96.01%, the efficacy of the control object is 20% flonicamid water dispersible granule 25 mL/mu treatment, 15% tolfenpyrad suspending agent 40 mL/mu treatment and 20% bifenthrin emulsion in water 15 mL/mu treatment on the tea leafhoppers of tea trees is 88.13%, 88.58% and 89.33%, which are lower than the efficacy of the tested object (table 3 and table 4).
The DPS software is used for carrying out difference significance analysis on the prevention effect results after 7 days of medicine by using a Duncan new compound polar difference method, and the results show that the difference between the prevention effect of the tested object of 350 g/L flonicamid-tolfenpyrad suspending agent of 10 mL/mu treatment and the prevention effect of the tested object of 20 mL/mu treatment on tea leafhoppers is significant, the prevention effect of the tested object of 15 mL/mu treatment and the control object of 20% flonicamid water dispersible granule of 25mL/667m2 treatment, the prevention effect of the 15% tolfenpyrad suspending agent of 40 mL/mu treatment and the prevention effect of the 20% bifenthrin aqueous emulsion of 15 mL/mu treatment on tea leafhoppers is good.
In the whole test process, no phytotoxicity is found to be generated on leaves and plants of the tested crops by applying the test drugs, and no adverse effect is found to be generated on the surrounding environment.
Application example four: example 2 field efficacy test for controlling tea leafhopper
The test purpose, the test basis, the water consumption, the calculation method and the formula are the same as those of the application embodiment III.
1 experiment site
Wu Xueshi Mei Chuanzhen by Hubei province.
2 selection of test subjects, crops and varieties
Test object: tea leafhopper (Empoasca pirisuga Matumura), tea tree is green tea, and the tree is 7 years old.
3 times and times of application
2021, 10 months and 5 days, the tea trees are in autumn and piggy-back growth period, and the tea leafhoppers are in emergence stage, and the medicine is applied for 1 time.
4 test design and arrangement
TABLE 5 test design sheet for test object
| Treatment of | Test object | Dosage of the preparation | Dosage of active ingredient |
| A | 350 g/L flonicamid-tolfenpyrad suspending agent | 10 mL/mu | 52.5g/hm 2 |
| B | 350 g/L flonicamid-tolfenpyrad suspending agent | 15 mL/mu | 78.75g/hm 2 |
| C | 350 g/L flonicamid-tolfenpyrad suspending agent | 20 mL/mu | 105g/hm 2 |
| D | 150 g/L flonicamid emulsifiable concentrate | 22 mL/mu | 49.5g/hm2 |
| E | 15% tolfenpyrad suspending agent | 50 mL/mu | 112.5g/hm2 |
| F | 20% bifenthrin aqueous emulsion | 15 mL/mu | 45g/hm2 |
| CK | Clear water control | / | / |
5 investigation time, times and method
When the morning dew was not dry, the number of nymphs on 30 shoot tips (3, 4 leaves of one bud) per cell was investigated randomly.
The insect population cardinality was investigated before treatment, and the control effect was investigated 1, 3 and 7 days after treatment. A total of 4 surveys.
6 experimental results
TABLE 6 example 2 field control of tea leafhoppers-insect-mouth reduction Rate
TABLE 7 example 2 field controlling Effect on tea leafhoppers
Note that lowercase letters indicate differences between treatments at the 0.05 level and uppercase letters indicate differences between treatments at the 0.01 level.
The experimental results show that: the test object 350 g/L flonicamid-tolfenpyrad suspending agent of the embodiment 2 has good quick acting performance on tea leafhoppers, and 1 day after the test object is applied, the test object 350 g/L flonicamid-tolfenpyrad suspending agent has good quick acting performance on tea leafhoppers, and the insect mouth decline rate of the tea leafhoppers under the treatment of 10 mL/mu, 15 mL/mu and 20 mL/mu is between 73.44 and 88.25 percent, and the prevention effect on tea leafhoppers is between 75.58 and 89.36 percent; the control substance comprises 50 mL/mu of flonicamid water dispersible granule, 40 mL/mu of 15% tolfenpyrad suspending agent and 15 mL/mu of 20% bifenthrin aqueous emulsion, wherein the prevention effect of the control substance on tea leafhoppers is 71.59%, 77.05% and 80.39% respectively; the control effect of each dose of the tested object on tea leafhoppers is improved by 3 days after the drug, compared with 1 day after the drug, the control effect of the 10% flonicamid water dispersible granule of the control object on tea leafhoppers is improved by between 84.68 and 93.87 percent, the control object on tea leafhoppers is respectively 81.98%, 84.45 and 85.64% after the treatment of the 15% tolfenpyrad suspending agent of 40 mL/mu and the treatment of 20% bifenthrin emulsion in water of 15 mL/mu (table 6 and table 7).
The efficacy of the tested object 350 g/L flonicamid-tolfenpyrad suspending agent on tea leafhoppers of tea trees is excellent 7 days after the drug administration, the rate of reduction of insect mouths of the leafhoppers reaches more than 91.52 percent under the treatment of each dose of the tested object, the efficacy is between 92.16 percent and 97.51 percent, the efficacy of the control object 10 percent flonicamid water dispersible granule is treated by 50 mL/mu, the efficacy of the control object 15 percent flonicamid suspending agent 40 mL/mu is treated, the efficacy of the control object 20 percent bifenthrin aqueous emulsion 15 mL/mu is 88.48 percent, 90.70 percent and 90.94 percent on the tea leafhoppers of tea trees respectively, and the efficacy is lower than that of the tested object (table 6 and table 7).
The DPS software is used for carrying out difference significance analysis on the prevention effect results after 7 days of medicine by using a Duncan new compound polar difference method, and the results show that the difference between the prevention effect of the tested object of 350 g/L flonicamid-tolfenpyrad suspending agent of 10 mL/mu treatment and the prevention effect of the tested object of 20 mL/mu treatment on tea leafhoppers is significant, the prevention effect of the tested object of 15 mL/mu treatment and the control object of 10% flonicamid water dispersible granule of 50 mL/mu treatment, 15% tolfenpyrad suspending agent of 40 mL/mu treatment and 20% bifenthrin aqueous emulsion of 15 mL/mu treatment on tea leafhoppers is good, and the effect of the tested object is better.
In a word, 350 g/L flonicamid-tolfenpyrad suspending agent has better control effect on tea leafhoppers of tea trees, and experimental observation shows that 350 g/L flonicamid-tolfenpyrad suspending agent has no obvious influence on leaf color and plant growth state of tea trees within the experimental dosage range, and is safe and harmless to tea trees.
Application example five: examples 1 and 2 environmental impact measurement experiments
I entrust third party company to carry out 10 tests such as a bee acute oral toxicity test, a bee acute contact toxicity test, a bird acute oral toxicity test, a fish acute toxicity test, a silkworm acute toxicity test, a daphnia acute activity inhibition test, an algae growth inhibition test, an earthworm acute toxicity test, a natural enemy trichogramma acute toxicity test, a natural enemy ladybug acute contact toxicity test and the like on the examples 1-2, wherein the test results are as follows:
1) The bee acute oral toxicity test shows that the toxicity level is low.
2) Bee acute contact toxicity test, the toxicity level is low.
3) Acute oral toxicity test of birds, the toxicity grade is slightly toxic.
4) Acute toxicity test of fish, the toxicity grade is low.
5) And (3) testing the acute toxicity of the silkworm, wherein the toxicity grade is slightly toxic.
6) The daphnia acute activity inhibition test has low toxicity level.
7) Algae growth inhibition test, toxicity grade is low toxicity.
8) Acute toxicity test of earthworm, the toxicity grade is slightly toxic.
9) The natural enemy trichogramma acute toxicity test is low in risk.
10 Natural enemy ladybug acute contact toxicity test, low risk.
Application example six: examples 1-2 acute toxicology assay experiments
I delegate the third party detection mechanism to conduct acute toxicity test on the embodiment 1-2, and the test result is as follows:
1) The toxicity grade of the acute oral toxicity test of the rat is low.
2) Acute percutaneous toxicity test of rats, the toxicity grade is slightly toxic.
3) The eye irritation test of rabbits shows no irritation.
4) Skin irritation test, no irritation.
5) Skin sensitization test. The experimental animal is guinea pig; sensitization intensity is zero.
The foregoing is a further detailed description of the invention in connection with the preferred embodiments, and it is not intended that the invention be limited to the specific embodiments described. It will be apparent to those skilled in the art that several simple deductions or substitutions may be made without departing from the spirit of the invention, and these should be considered to be within the scope of the invention.
Claims (6)
1. An application method of a composition for preventing and controlling tea leafhoppers of tea trees is characterized by comprising the following steps: the application method is that flonicamid, tolfenpyrad and auxiliary agent are prepared into suspending agent according to a certain proportion, and the suspending agent is used for preventing and controlling tea leafhoppers.
2. The method of administration of claim 1, wherein: the ratio of flonicamid to tolfenpyrad is 3:2-2:3.
3. The method of administration of claim 2, wherein: the ratio of flonicamid to tolfenpyrad is 18:17.
4. A method of administration according to any one of claims 1 to 3, wherein: the content of effective active ingredients of the composition is 100-500 g/L.
5. The method of administration of claim 4, wherein: the effective active ingredient content of the composition is 350 g/L.
6. The method of administration of claim 4, wherein: the dosage of the active ingredients of the composition is 52.5-105 g/hectare.
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