CN108378055B - Pesticide composition containing pyraclostrobin, pesticide and application - Google Patents

Pesticide composition containing pyraclostrobin, pesticide and application Download PDF

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CN108378055B
CN108378055B CN201810317216.9A CN201810317216A CN108378055B CN 108378055 B CN108378055 B CN 108378055B CN 201810317216 A CN201810317216 A CN 201810317216A CN 108378055 B CN108378055 B CN 108378055B
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pesticide
pyraclostrobin
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cotton
cotton boll
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CN108378055A (en
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赵鸣
隋洁
杨媛雪
薛超
雒珺瑜
张帅
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Shandong Cotton Research Center
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Shandong Cotton Research Center
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    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
    • A01N47/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom not being member of a ring and having no bond to a carbon or hydrogen atom, e.g. derivatives of carbonic acid
    • A01N47/08—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom not being member of a ring and having no bond to a carbon or hydrogen atom, e.g. derivatives of carbonic acid the carbon atom having one or more single bonds to nitrogen atoms
    • A01N47/10—Carbamic acid derivatives, i.e. containing the group —O—CO—N<; Thio analogues thereof
    • A01N47/24—Carbamic acid derivatives, i.e. containing the group —O—CO—N<; Thio analogues thereof containing the groups, or; Thio analogues thereof
    • 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
    • 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

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  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Dentistry (AREA)
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  • Engineering & Computer Science (AREA)
  • Pest Control & Pesticides (AREA)
  • Agronomy & Crop Science (AREA)
  • Wood Science & Technology (AREA)
  • Zoology (AREA)
  • Environmental Sciences (AREA)
  • Toxicology (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)

Abstract

The invention relates to the technical field of pesticides, and particularly provides a pesticide composition containing pyraclostrobin, which comprises the following effective components in parts by weight: 0.5-5 parts of pyraflufen-ethyl, 8-30 parts of pyraclostrobin and 40-120 parts of high-fat membrane. In the active substances of the medicament composition, pyraflufen-ethyl plays a role in defoliation, can improve the growth environment of cotton bolls at the middle lower part of cotton plants after being applied, and can create an environment which is not beneficial to the infection and growth of pathogenic microorganisms; pyraclostrobin can effectively prevent and treat cotton boll disease caused by oomycetes; the high-fat film can effectively control the expansion of infected disease spots and reduce the infection probability of bolls by other weak pathogenic bacteria. After the three components are compounded, the disease development can be effectively controlled and the infection probability of the cotton boll by adjusting the external environment of the cotton boll and inhibiting the activity and the infection probability of pathogenic bacteria of the cotton boll disease after the composition is applied in the initial stage of the cotton boll disease, and the infection probability of the cotton boll by other weak pathogenic bacteria can be reduced.

Description

Pesticide composition containing pyraclostrobin, pesticide and application
Technical Field
The invention relates to the technical field of pesticides, and particularly relates to a pesticide composition containing pyraclostrobin, a pesticide and application.
Background
Cotton boll disease (CottonBoll Rot) is a general term for diseases on cotton bolls, mainly comprises epidemic disease, red Rot, anthrax, angular leaf spot, black fruit, red pollen and the like, and is an important disease in cotton production in China. Generally, cotton bolls begin to occur at the lower part of a cotton plant in the 8 th month, epidemic diseases are taken as main causes in the early stage, the occurrence and development of the epidemic diseases can not only be directly harmful to the cotton bolls, but also open a passage for the invasion of other pathogenic bacteria, symptoms such as valve stiffness, rot and the like can be caused, and the quality and the yield of cotton are seriously influenced. The rotten boll rate of the boll in the year of the major occurrence of boll diseases can reach 100 percent, and the rotten boll of a single plant can reach more than 5, which is one of the important diseases in the current cotton production.
Pyraflufen-ethyl (Pyraflufen-ethyl), chemical name: 2-chloro-5- (4-chloro-5-difluoromethoxy-1-methylpyrazole-3-yl) -4-fluorophenoxyacetic acid ethyl ester, which is a phenylpyrazole post-emergence herbicide. After the stem and leaf of the medicine are treated, the medicine can be quickly absorbed into plant tissues to quickly necrose plants, or the stem and leaf can be dehydrated and dried under the irradiation of sunlight, so that the medicine has a good defoliating effect.
Pyraclostrobin (pyraclosteron), molecular formula: c19H18ClN3O4And methoxyl acrylic ester bactericide. Pyraclostrobin is a mitochondrial respiration inhibitor that inhibits mitochondrial respiration by preventing electron transfer between cytochrome b and Cl, rendering mitochondria unable to produce and supply energy (ATP) required for normal cellular metabolism, ultimately leading to cell death. The bactericide has broad bactericidal spectrum, and can control most diseases of ascomycetes, basidiomycetes, deuteromycetes, oomycetes, and the like. Has strong inhibiting effect on spore germination and growth of leaf mycelium, and has protective and therapeutic activity. Can be used for various crops such as wheat, peanut, rice, vegetables, fruit trees, tobacco, tea trees, ornamental plants, lawns and the like, and can be used for preventing and treating a plurality of diseases such as leaf blight, rust disease, powdery mildew, downy mildew, epidemic disease, anthracnose, scab, brown spot, damping off and the like caused by ascomycetes, basidiomycetes, deuteromycetes and oomycetes fungi.
The high-fat film (palm alcohol-lauryal alcohol) is a film-forming material made of high-grade fatty acid, and can be sprayed on the surface of crops, and can automatically diffuse and spread to form a thin monomolecular fatty alcohol film, so that it can effectively control the extension of plant disease-affected portion, and its effective period is long, and the pathogenic bacteria can not produce drug resistance, and its self-body is non-toxic, and harmless to human, plant and fish, so that it is a "nuisanceless" pesticide.
At present, the existing research mainly comprises 0.5 percent of Bordeaux mixture, 70 percent of mancozeb, 50 percent of carbendazim, 50 percent of thiram, 64 percent of virus killing agent and the like for preventing and treating the cotton boll disease at the initial stage, on one hand, the commonly used preventing and treating agent ensures that pathogenic microorganisms generate certain drug resistance due to long-term application, and the dosage is required to be increased for application; on the other hand, the environmental problems of pesticide abuse, pollution and the like exist when the pesticide application dosage is too large.
Disclosure of Invention
In view of the above, the invention provides the pyraclostrobin-containing medicament composition with a good early cotton boll disease prevention and treatment effect, in order to solve the problems of low control effect and excessive field dosage of the existing pesticide.
In order to achieve the above object, the present invention provides the following technical solutions:
the invention provides a medicament composition containing pyraclostrobin, which comprises the following components in parts by weight: 0.5-5 parts of pyraflufen-ethyl, 8-30 parts of pyraclostrobin and 40-120 parts of high-fat membrane.
Preferably, the components comprise: 1-2 parts of pyraflufen-ethyl, 10-20 parts of pyraclostrobin and 50-100 parts of high-fat membrane.
The invention provides a pesticide containing pyraclostrobin, which comprises an effective dose of the medicament composition and a pesticide auxiliary agent in the technical scheme.
Preferably, in the pesticide, the mass of the pesticide composition accounts for 1-99% of the total mass of the pesticide.
Preferably, in the pesticide, the mass of the medicament composition accounts for 20-60% of the total mass of the pesticide.
Preferably, the ratio of the total mass of the medicament composition to the total mass of the pesticide auxiliary agent is 1: 0.5-2.
Preferably, the pesticide adjuvant comprises one or more of a solvent, a wetting agent, a dispersing agent, a carrier, a stabilizer, an anti-caking agent and a defoaming agent.
Preferably, the pesticide further comprises a diluent and/or a filler.
Preferably, the pesticide is in a dosage form selected from a glue agent, a granule, a wettable powder, a suspending agent, an emulsifier, an emulsifiable concentrate or an aqueous solution.
The pyraclostrobin-containing medicament composition or the pyraclostrobin-containing pesticide provided by the invention can be applied to early prevention and treatment of cotton boll diseases.
Compared with the prior art, the invention has the following advantages:
the invention provides a medicament composition containing pyraclostrobin, which comprises the following components in parts by weight: 0.5-5 parts of pyraflufen-ethyl, 8-30 parts of pyraclostrobin and 40-120 parts of high-fat membrane. In the medicament composition, the pyraflufen-ethyl has the defoliating effect, can improve the growth environment of cotton bolls at the middle lower part of a cotton plant after being applied, and can create an environment which is not beneficial to the infection and growth of pathogenic microorganisms; pyraclostrobin can effectively prevent and treat cotton boll disease caused by oomycetes; the high-fat film can effectively control the expansion of infected disease spots and reduce the infection probability of bolls by other weak pathogenic bacteria. After the three components are compounded, the disease development can be effectively controlled and the infection probability of the cotton boll by adjusting the external environment of the cotton boll and inhibiting the activity and the infection probability of pathogenic bacteria of the cotton boll disease after the composition is applied in the initial stage of the cotton boll disease, and the infection probability of the cotton boll by other weak pathogenic bacteria can be reduced. The field experiment shows that the pesticide prepared from the pyraclostrobin-containing composition disclosed by the invention has a cotton boll disease prevention effect of more than 61.35% after being applied at an effective component dosage of 50-90 g/hectare, and the prevention effect is improved compared with that of a single agent with the same application amount and high concentration.
Meanwhile, tests prove that after the pyraclostrobin and the high-fat membrane are compounded in the pesticide composition, the pyraclostrobin has a synergistic effect, the co-toxicity coefficient reaches 131.14, the synergistic effect is obvious, the compounded antibacterial effect is superior to that of a single agent, and the using amount of the pesticide pyraclostrobin can be reduced while the cotton boll disease control effect is improved.
Detailed Description
The invention provides a medicament composition containing pyraclostrobin, which comprises the following components in parts by weight: 0.5-5 parts of pyraflufen-ethyl, 8-30 parts of pyraclostrobin and 40-120 parts of high-fat membrane. Preferably comprising: 1-2 parts of pyraflufen-ethyl, 10-25 parts of pyraclostrobin and 50-110 parts of high-fat membrane; more preferably, it comprises: 2 parts of pyraflufen-ethyl, 20 parts of pyraclostrobin and 100 parts of high-fat membrane.
In the invention, the pyraflufen-ethyl mainly plays a role in defoliation, and after the pyraflufen-ethyl is applied to the surfaces, the middle and lower leaves or the ground and the like of cotton bolls, the pyraflufen-ethyl can enable the middle and lower leaves of the cotton plants to rapidly shed, so that the growing environment of the cotton bolls in the middle and lower parts of the cotton plants is improved. The higher humidity is an important factor for cotton boll diseases, so that pyraflufen which can remove lower leaves of cotton is added into the medicament composition, ventilation is enhanced, environmental humidity is reduced, and an environment which is not beneficial to infection and growth of pathogenic microorganisms is manufactured.
In the invention, the pyraclostrobin mainly plays a role in bacteriostasis, and the compounded synergistic effect of the pyraclostrobin and the high-lipid membrane can obviously improve the bacteriostasis effect on pathogenic microorganisms of cotton boll diseases such as cotton anthracnose pathogen, cotton red rot pathogen, cotton boll black fruit disease pathogen and the like. The enlargement of the plant pathogenic bacteria infected with cotton can be effectively controlled through the enhancement of the bacteriostasis, and the further development of epidemic diseases is prevented.
In the invention, the high-fat membrane mainly plays a role in enhancing the bacteriostatic action and protecting the pyraclostrobin, and the high-fat membrane and the pyraclostrobin can generate a synergistic effect, so that the bacteriostatic effect of the medicament composition is effectively improved; on the other hand, after the medicament composition is applied to cotton plants, a high-fat film can be formed on the surfaces of the plants, so that the probability of cotton boll infection by other weak pathogenic bacteria is reduced, and the early occurrence and development of boll red rot and red powdery mildew are effectively controlled.
In the invention, the preferable compound mass ratio of the pyraclostrobin to the high-fat membrane is 1: 5-10.
The sources of pyraflufen-ethyl, pyraclostrobin and the high-lipid membrane are not specially limited, and the pyraflufen-ethyl can be obtained by adopting commercially available commodities.
In the invention, the medicament composition containing the pyraclostrobin is prepared by mixing the components.
The invention also provides a pesticide containing pyraclostrobin, which comprises the medicament composition and a pesticide auxiliary agent in the technical scheme.
In the invention, the pesticide adjuvant mainly plays roles of stabilizing, dissolving and dispersing, providing a proper carrier environment, preventing caking, defoaming and the like, and provides a proper existence and functional environment for the effective components of the medicament composition.
In the invention, the ratio of the total mass of the medicament composition to the total mass of the pesticide auxiliary agent is 1: 0.5-2; more preferably 0.65 to 1.95 times. Preferably, the pesticide adjuvant comprises one or more of a solvent, a wetting agent, a dispersing agent, a carrier, a stabilizer, an anti-caking agent and a defoaming agent. The selection is made according to different preparation forms to be prepared. The dosage of each pesticide adjuvant is not specially limited, and is determined by tests according to the requirements of pesticide preparations.
In the present invention, the solvent is preferably selected from one or more of water, benzene, toluene, xylene or C9 aromatic hydrocarbon.
In the present invention, the wetting agent is preferably one or more selected from the group consisting of cetyl betaine, sodium dinonyl phosphate, dodecylaminopropionic acid, sodium lauryl sulfate and sodium oleate.
In the present invention, the dispersant is preferably one or more selected from the group consisting of N-methyl fatty acyl taurates, alkyl phosphate esters, GY-D06, and Emulphor.
In the present invention, the carrier is preferably selected from one or more of diatomaceous earth, attapulgite clay, bentonite, sepiolite, white carbon black and zeolite.
In the present invention, the stabilizer is preferably one or more selected from the group consisting of alkyl phosphate, glycerol monostearate and N-soybean oil-based trimethylene diamine.
In the present invention, the anti-caking agent is preferably selected from one or more of potassium ferrocyanide, sodium aluminosilicate and silica.
In the present invention, the antifoaming agent is preferably one or more selected from the group consisting of DF-830, DF-831 and DF-832.
In the present invention, the pesticide preferably further comprises a filler and/or a diluent. In the present invention, the filler includes, but is not limited to, one or more of microcrystalline cellulose, pregelatinized starch, hydroxypropylcellulose, and polyethylene glycol; the diluent includes, but is not limited to, one or more of lactose, starch, dextrin, inorganic salt type diluent, and mannitol. The filler and/or the diluent mainly play a role in diluting the content of the effective substances, and have no influence on the activity and the like of the effective substances.
In the pesticide containing pyraclostrobin, the pesticide composition accounts for 1-99% of the total mass of the pesticide, and more preferably 20-60%.
The pesticide formulation containing the pyraclostrobin is preferably selected from glue, granules, wettable powder, suspending agents, emulsifying agents, missible oil or aqueous agents.
The pesticide containing the pyraclostrobin is prepared by mixing the pesticide compositions, and adding a pesticide auxiliary agent and/or a diluent or a filler according to a known preparation method to prepare the pesticide containing the pyraclostrobin in a corresponding dosage form based on different specific dosage forms of the pesticide.
Specifically, when the pesticide formulation is wettable powder, the pesticide composition and the pesticide auxiliary agent are taken according to the mass ratio, the components are respectively ground to 200-400 meshes and then ground to the particle size of 0.03-0.05 mm, and the components are mixed to obtain the wettable powder containing the pyraclostrobin. Preferably, the particle size after regrinding is 0.044 mm.
In the present invention, the pulverized particle size is preferably 325 mesh. In the present invention, when the pesticide further includes a diluent and/or a filler, the pesticide composition, the pesticide adjuvant, and the diluent and/or the filler are separately pulverized, ground, and mixed to obtain a wettable powder.
The invention also aims to provide the application of the pesticide containing the pyraclostrobin in the technical scheme in the early prevention and treatment of cotton boll diseases; specifically, the pesticide containing pyraclostrobin is applied to the cotton boll surface, the plant root system and the middle lower part of the plant.
The concentration of the pesticide composition used as the active ingredient of the pesticide composition for early prevention and treatment of cotton boll diseases is preferably 50-90 g/ha. In a specific embodiment of the invention, the pesticide containing pyraclostrobin is applied as a medicament for preventing and treating pink disease, red rot of cotton boll and other cotton boll diseases.
The technical solution of the present invention is clearly and completely described below with reference to the embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
According to parts by weight, 0.5 part of pyraflufen-ethyl, 5 parts of pyraclostrobin, 25 parts of high-fat membrane, 5 parts of N-methyl fatty acyl taurate, 2 parts of hexadecyl betaine, 5 parts of white carbon black and 57.5 parts of kaolin are taken, the materials are respectively crushed to 325 meshes, ground to the granularity of 0.044mm by a grinding machine, and mixed to obtain 25.5% wettable powder containing pyraclostrobin.
Example 2
According to the weight parts, 1 part of pyraflufen-ethyl, 5 parts of pyraclostrobin, 35 parts of high-lipid membrane, 5 parts of alkyl phosphate, 2 parts of sodium dinonyl phosphate, 5 parts of white carbon black and 47 parts of kaolin are respectively ground to 200 meshes, ground to the particle size of 0.035mm by a grinding machine, and mixed to obtain 41% pyraclostrobin-containing wettable powder.
Example 3
According to the weight parts, 0.5 part of pyraflufen-ethyl, 10 parts of pyraclostrobin, 50 parts of high-fat membrane, 5 parts of GY-D06, 2 parts of ammonium lauryl sulfate, 5 parts of white carbon black and 27.5 parts of kaolin are taken, the materials are respectively crushed to 400 meshes, then ground to the granularity of 0.05mm by a grinding machine, and mixed to obtain 60.5% wettable powder containing pyraclostrobin.
Example 4
Taking 1 part of pyraflufen-ethyl, 5 parts of pyraclostrobin, 35 parts of high-fat membrane, 13 parts of cyclohexanone, 10 parts of isopropanol, 16 parts of fatty acid polyoxyethylene ester and tap water in parts by weight, supplementing to 100 parts, and mixing to obtain the 41% pyraclostrobin-containing microemulsion.
Example 5
According to the weight parts, 1 part of pyraflufen-ethyl, 5 parts of pyraclostrobin, 35 parts of high-fat membrane, 2.5 parts of D-425, 1 part of EFW, 0.2 part of xanthan gum and 5 parts of ethylene glycol are taken, deionized water is added to make up to 100 parts, and the 41% pyraclostrobin-containing suspending agent is obtained after mixing.
Example 6
In order to verify the indoor control effect of the pyraclostrobin and the high-fat membrane, an indoor synergistic test is carried out on the pyraclostrobin and the high-fat membrane, and the process comprises the following steps:
1. collecting cotton bolls with the same boll position and similar size of cotton in a field, cleaning the cotton bolls with clear water, wiping the cotton bolls dry, and disinfecting the surfaces of the cotton bolls with 75% alcohol for later use;
2. the cotton boll blight pathogenic bacteria phytophthora ramie cultured in the culture dish selects the parts with the same growth positions of the bacterial colonies to be punched, and bacterial dishes of 0.5cm are prepared for later use;
3. punching holes in the middle of the cotton bolls with sterilized surface by using a inoculating needle, wherein the size and depth of the punched holes are kept consistent, punching one hole at each point, reversely buckling the prepared bacterial plate on the punched part of the cotton bolls, wrapping the cotton boll handles with sterile cotton dipped in sterile water for moisturizing, putting the cotton bolls into a sterilized glass lunch box, and culturing in an artificial climate box at 30 ℃.
4. The test is divided into three groups, each group is divided into 6 groups, and each group is provided with three parallel samples which are respectively as follows:
a first group: the treatment concentrations of the pyraclostrobin in the pyraclostrobin groups 1-6 in the groups are 1ppm, 5ppm, 25ppm, 125ppm and 625ppm in sequence, and the blank control group 1 is adopted;
second group: the treatment concentrations of the high lipid membranes in the high lipid membrane group 1-6 groups are 1ppm, 5ppm, 25ppm, 125ppm and 625ppm in sequence, and the blank control group 2;
third group: the pyraclostrobin and high-fat membrane compound group in the 1-6 groups has treatment concentrations of 1ppm, 5ppm, 25ppm, 125ppm and 625ppm in sequence, and a blank control group 3.
4. Observing the disease occurrence of cotton bolls of each group every day, measuring the diameter of bacterial plaque by a cross method after 10 days, calculating the inhibition rate of each treatment, processing the result by SPSS 20 software, and calculating the inhibition toxicological equation and IC of the medicament on the bacterial plaque50And simultaneously calculating the interaction of the mixture.
Inhibition (%) - (control cotton boll lesion spot diameter-bacterial disc diameter) - (spray cotton boll lesion spot diameter-bacterial disc diameter))/(spray cotton boll lesion spot diameter-bacterial disc diameter) × 100%
Co-toxicity coefficient (%) (1/IC)50(A+B))/((1/IC50(A))×A％+(1/IC50(B))×B％)
The results are detailed in table 1.
TABLE 1 preventive effect of pyraclostrobin and high lipid membrane complex on cotton boll disease in room
Figure BDA0001624184090000081
The results in table 1 show that, in the dosage range of the invention, the co-toxicity coefficient of the pyraclostrobin and the high-fat membrane after compounding reaches 131.14, the synergistic effect is obvious, and the compounding is remarkably better than that of a single agent, namely, the pyraclostrobin and the high-fat membrane have synergistic effect, so that the problems of effective prevention and control of cotton boll diseases in the initial stage, reduction of pesticide dosage and cost saving are solved.
Comparative example 1
2% pyraflufen-ethyl suspension (Shandong Xianda agrichemical Co., Ltd.).
Comparative example 2
25% pyraclostrobin suspension (agriculture chemical ltd, jonan, shod, shandong).
Comparative example 3
A new high-fat membrane powder is sold in the market (Kao Tech technologies of Shanxi province, Weinan high-new region).
Example 6
The test is carried out on the field pesticide effect of the pesticide composition.
Test site: the cotton is selected as the first crop of the test cotton field, the fertility is high, the irrigation and drainage conditions are good, the weeds in the cotton field are few, the surrounding environment is cotton, and the herbicide used in the cotton field is Trifluralin (Trifluralin) mixed soil before sowing.
Test cultivation management conditions: the test crop is cotton sowed in spring, the cotton cultivation management level is high, and the normal growth and development of the cotton can be ensured. The planting density per mu is 2000-2500 plants.
The application method comprises the following steps: the pesticide is applied once 10-15 days (about 8 middle ten days) before the cotton boll rot disease occurs, a manual backpack type Linong brand sprayer is adopted to spray the pesticide according to the pesticide application amount of each group, the caliber of a spraying piece is 0.7mm, sufficient gas is applied, the pesticide is uniformly sprayed on the boll surface, the middle and lower leaves and the ground, and the actual water consumption per mu is 60 liters (900 liters/hectare).
Investigation method and frequency: 12 experimental groups were set, and divided into four groups, each group was divided into 3 groups, each group was 1 mu, and 1 mu of test field without drug application was set as a control group. The grouping is as follows:
a first group: in the groups 1 and 1-3, the application amount of the effective ingredients of the wettable powder in the example 1 is 50 g/hectare, 70 g/hectare and 90 g/hectare in sequence;
second group: in the group 1 to 3 of the example 2, the application amount of the effective ingredients of the wettable powder in the example 2 is 50 g/hectare, 70 g/hectare and 90 g/hectare in turn;
third group: the application amount of the effective ingredients of the wettable powder applied in example 3 groups, 1-3 groups is 50 g/hectare, 70 g/hectare and 90 g/hectare in sequence;
and a fourth group: in the comparative example group, groups 1 to 3 were applied in the order of 5 g/ha of pyraflufen-ethyl in 2% pyraflufen-ethyl emulsifiable concentrate (comparative example 1), 40 g/ha of pyraclostrobin in 25% pyraclostrobin suspending agent (comparative example 2), and 150 g/ha of new high-lipid membrane powder (comparative example 3).
At least two rows of cotton (total number not less than 40) were fixed per group, and the number of all rotten bolls was investigated before application, and the total number of rotten bolls was investigated 7, 14 and 21 days after application, respectively.
And (4) calculating the control effect:
control effect (%) - (control average number of rotten bolls per plant-treatment average number of rotten bolls per plant)/control average number of rotten bolls per plant × 100
The results are detailed in table 2.
TABLE 2 prevention and treatment effects of pyraclostrobin-containing pesticide on cotton boll disease
Figure BDA0001624184090000101
Note: there was a significant difference in the representation between the different letters (p < 0.05).
As can be seen from the data in Table 2, the synergistic effect of the pyraflufen-ethyl, the pyraclostrobin and the high-fat membrane is obvious, the control effect on cotton boll diseases is obviously better than that of a single agent (comparative examples 1-3), the dosage of each component in the pesticide composition is obviously reduced compared with that of the single agent, pollution is relatively reduced, and therefore the environmental load is reduced, and the use cost is reduced.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims (8)

1. The application of a pyraclostrobin-containing medicament composition in early prevention and treatment of cotton boll diseases is characterized in that the medicament composition comprises the following components in parts by weight: 0.5-1 part of pyraflufen-ethyl, 5-10 parts of pyraclostrobin and 25-50 parts of high-fat membrane;
the concentration of the medicament composition is 50-90 g/hectare; the actual water consumption is 900 liters per hectare;
the compounding ratio of the pyraclostrobin to the high-fat membrane is 1: 9.
2. the application of a pesticide containing pyraclostrobin in early prevention and treatment of cotton boll diseases is characterized in that the pesticide comprises an effective dose of the medicament composition as claimed in claim 1 and a pesticide auxiliary agent; the pesticide using the pesticide composition as the active ingredient is applied to early prevention and control of cotton boll diseases, the concentration of the pesticide composition is 50-90 g/ha, and the actual water consumption is 900 liters/ha.
3. The use according to claim 2, wherein the pesticide composition comprises 1 to 99% by mass of the total pesticide mass.
4. The use according to claim 3, wherein the pesticide composition comprises 20 to 60% by mass of the total pesticide mass.
5. The use according to claim 4, wherein the ratio of the total mass of the medicament composition to the total mass of the pesticide adjuvant is 1: 0.5-2.
6. The use according to claim 2, wherein the pesticide adjuvant comprises one or more of a solvent, a wetting agent, a dispersant, a carrier, a stabilizer, an anti-caking agent and an anti-foaming agent.
7. Use according to claim 2, characterized in that the pesticide further comprises a diluent and/or a filler.
8. The use according to any one of claims 2 to 7, wherein the pesticide is in a dosage form selected from the group consisting of a gum, a granule, a wettable powder, a suspension, an emulsifier, an emulsifiable concentrate, and an aqueous solution.
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CN105284844B (en) * 2015-11-17 2017-08-29 山东棉花研究中心 A kind of composition pesticide containing pyraflufen-ethyl and pyraclostrobin

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CN105284844B (en) * 2015-11-17 2017-08-29 山东棉花研究中心 A kind of composition pesticide containing pyraflufen-ethyl and pyraclostrobin

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