CN114467929A - Recyclable mosquito eradication young material capable of being suspended on water surface for long time and preparation method and application thereof - Google Patents

Recyclable mosquito eradication young material capable of being suspended on water surface for long time and preparation method and application thereof Download PDF

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CN114467929A
CN114467929A CN202210168987.2A CN202210168987A CN114467929A CN 114467929 A CN114467929 A CN 114467929A CN 202210168987 A CN202210168987 A CN 202210168987A CN 114467929 A CN114467929 A CN 114467929A
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mosquito
oil
allyl isothiocyanate
water
suspended
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不公告发明人
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Shanxi Badun Environmental Protection Technology Institute
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Shanxi Badun Environmental Protection Technology Institute
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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
    • 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
    • A01N25/08—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 solids as carriers or diluents
    • A01N25/10—Macromolecular compounds
    • 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
    • A01N47/40—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 a double or triple bond to nitrogen, e.g. cyanates, cyanamides
    • A01N47/46—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 a double or triple bond to nitrogen, e.g. cyanates, cyanamides containing —N=C=S groups
    • 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
    • A01N65/00—Biocides, pest repellants or attractants, or plant growth regulators containing material from algae, lichens, bryophyta, multi-cellular fungi or plants, or extracts 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
    • A01N65/00—Biocides, pest repellants or attractants, or plant growth regulators containing material from algae, lichens, bryophyta, multi-cellular fungi or plants, or extracts thereof
    • A01N65/08—Magnoliopsida [dicotyledons]
    • A01N65/18—Euphorbiaceae [Spurge family], e.g. ricinus [castorbean]

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Zoology (AREA)
  • Agronomy & Crop Science (AREA)
  • Plant Pathology (AREA)
  • Environmental Sciences (AREA)
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  • Wood Science & Technology (AREA)
  • Pest Control & Pesticides (AREA)
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  • Natural Medicines & Medicinal Plants (AREA)
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  • Agricultural Chemicals And Associated Chemicals (AREA)

Abstract

The invention discloses a recyclable mosquito eradication material capable of being suspended on water for a long time and a preparation method thereof. The mosquito eradication material comprises the effective component of allyl isothiocyanate, the curing agent of tung oil and the carrier of polypropylene oil absorption cotton fiber. The product of the invention is characterized in that the allyl isothiocyanate is insoluble in water and has no influence on aquatic organisms such as juvenile fish/juvenile shrimps in water. Experiments prove that the mosquito larva killing material can be suspended on the water surface for a long time, has the effect of killing mosquito larvae, has the killing rate of over 90 percent, is safe to aquatic organisms and water environment, can thoroughly solve the problem of environmental hazard caused by improper use method (throwing in water) of the mosquito larva killing agent, and has important significance for reducing the population quantity of mosquito larvae and reducing mosquito-borne infectious diseases.

Description

Recyclable young mosquito eradication material capable of being suspended on water surface for long time and preparation method and application thereof
Technical Field
The invention relates to a recyclable young mosquito eradication material capable of being suspended on water for a long time and a preparation method thereof, in particular to a young mosquito eradication material prepared by adsorbing isothiocyanic acid propylene by polypropylene fiber oil absorption cotton, which can be suspended on water for a long time, is insoluble in water as a mosquito eradication medicament (isothiocyanic acid propylene ester), has no chemical injury to other organisms (juvenile fish/juvenile shrimps) in water and can be recycled after use, belonging to the technical field of mosquito prevention and eradication.
Background
Mosquitoes are important pests and vectors for the transmission of various infectious diseases such as dengue fever, malaria, yellow fever, filariasis, encephalitis, etc. According to incomplete statistics, about 75 to 100 million deaths caused by diseases spread by mosquitoes are caused every year in the world. Malaria, among others, is one of the mosquito-borne infectious diseases, and poses a significant health risk to tropical and subtropical regions. Another mosquito-borne infectious disease transmitted by the aedes aegypti mosquito is dengue virus, infecting approximately one hundred million people per year, mainly in latin america and asia. Recently, mosquito-mediated diseases in the united states have risen. Since the first report in New York, 1999, that humans have been infected with West Nile Virus, the move has been gradually southward and westward, with detection records in all states in the United states. Eastern equine encephalitis virus (EEE) is another mosquito-transmitted arbovirus that also contributes to disease in the United states as well as in the Central and south America. EEE infection is characterized by convulsions and coma, resulting in about half of the deaths of patients. The use of chemical mosquito-killing agents in large quantities leads to the annual increase of drug resistance. Therefore, new technologies/new products for mosquito prevention and killing are urgently needed in the world, which are safer, more environment-friendly, more effective and non-resistant.
At present, most of the existing mosquito-killing agents at home and abroad are chemicals, including disulfur and pyrethrins mosquito-killing agents. In addition, there are also some plant sources and biological mosquito repellent larvae (e.g., Bt). However, most of the products are mixed and dissolved in water to generate the mosquito killing effect, and the suspensible and recyclable mosquito killing young products are not found. In a word, no matter which mosquito eradication agent is used, the long-term throwing application to water is easy to cause lasting harm to human, animals, aquatic organisms and water environment.
If we can invent a new mosquito eradication material which has no harm to people, animals, water environment and aquatic organisms and can be recycled, the problem of the influence of the mosquito eradication agent on the water environment can be thoroughly solved, and the invention is a significant invention for the world.
Disulfoton (larvicide), 4,4' -bis (O, O-dimethylthiophosphoryloxy) phenylsulfide, otherwise known as telmefosib, formula C16H20O6P2S3Molecular weight 466.4689, CAS number 3383-96-8, white crystalline solid. Acute oral toxicity: rat LD501000 mg/kg; mouse LD50 223 mg/kg。
The parathion is the most common mosquito eradication agent applied globally, and is listed in a restricted or forbidden list in countries such as European Union in 2017 due to potential risk to water environment.
Pyrethroid insecticides also present a potential risk and are listed in banned or restricted use lists by the european union and other countries. Among them, the canadian pest authority (PMRA) recommended to ban certain uses of the pyrethroid insecticide permethrin in 11 months of 2017. In 2015, cyhalothrin was designated as a candidate substitute in the european union for reasons such as high toxicity. In 2017, PMRA proposed to ban the use of the pyrethroid insecticide lambda-cyhalothrin for all food and feed crops and stopped use in residential homes. In 2013, after the European Union examines the insecticides, the non-agricultural use of bifenthrin as an insecticide and acaricide is eliminated.
In addition, in the Chinese patent application with the application number of 201510394924.9 and the invention name of 'a preparation for killing mosquito larvae and preparation and application thereof', the larval mosquito killing active substance is tert-butylphenol compound which is toxic to aquatic organisms. In the Chinese patent application with the application number of 87104588 and the name of' mosquito eradication agent, the active substance is a poisonous chemical insecticide. In the Chinese patent application with the application number of 201310733631.X and the invention name of 'a bacillus thuringiensis preparation for killing mosquito larvae and a preparation method thereof', the carrier is glass beads which are not easy to degrade, and Bt has slow or limited effect on the mosquito larvae. The invention has the application number of 201310419640.1, is a Chinese patent application named as matrine plant source insecticidal emulsifiable concentrate (mosquito-killing larval agent), and has the advantages of complex preparation process, high application cost and insufficient control effect. In addition, the invention name of Chinese patent application No. 201810099421.2 is "an athomin microcapsule suspending agent and a preparation method thereof", although the suspending action is described, the suspending agent cannot be recycled, and the preparation process is complex.
In conclusion, the existing methods, technologies and application methods of the mosquito eradication product are easy to generate lasting toxic and side effects on the water environment. Along with the improvement of public environmental awareness, natural mosquito-proof and mosquito-killing materials gradually receive attention of people. Among them, the united states environmental protection agency has adopted legislative measures to classify certain natural compounds or food materials as "environmentally safe compounds (pesticides)", thereby protecting the use of these environmentally safe compounds from governmental regulations. (Note: what is commonly referred to as an "environmentally safe compound" is a compound that has limited or no adverse effect on the ecological environment.)
"it is three fens toxicity of herbs". The research and invention of new mosquito eradication technology or new mosquito eradication product which has no influence on water environment, can be suspended and can be recycled are urgent and important.
Mustard oil (a popular favorite condiment with a very pungent and pungent odor), chemical name: allyl isothiocyanate, molecular formula: c4H5NS, relative molecular mass: 99.15 (according to 2007 international relative atomic mass), and the Chinese national standard GB 29980-2013, the standard name is food safety national standard food additive allyl isothiocyanate.
The FDA in the united states has a clear limit directive for the use of allyl isothiocyanate, FEMA (mg/kg): 0.02-0.50% of soft drink; 0.50 of cold drink; 0.50 parts of candy; and 5.2, baking the food. With moderate limits (FDA-172.515, 2000).
At present, application of allyl isothiocyanate in agricultural disinsection, food preservation, medical treatment and medicine is very active, for example, the patent application number of 201610431130.X 'a greenhouse disinfection method' for greenhouse vegetable disinfection; patent No. 200810112497.0 "A Horseradish Capsule and its application" for soil disinfection; the patent application number of 201510757165.8 for soil disinfection is 'an athomin microcapsule slow release agent using silicon dioxide as a carrier and a preparation method thereof'; patent number 201310238688.2 "mustard oil nanoemulsion and preparation method thereof" for food antistaling agent.
The invention discloses a Chinese patent, application number 201810739257.7, which was filed in 2018 by the applicant of the present invention, and is named as a food-grade young mosquito killing preparation, a preparation method and an application thereof, which prove that allyl isothiocyanate can kill mosquitoes and young shrimps in water at low concentration, but the applicant finds that allyl isothiocyanate has toxic and killing effects on young fishes or young shrimps in water and other aquatic organisms in later experiments. Therefore, the invention loses its popularization and application value. The Japanese JP2012-180297A patent of invention "wiggler repellent" also has the problem of toxic side effect of mosquito-killing agent to aquatic organisms.
Disclosure of Invention
The invention aims to provide a recyclable mosquito eradication material capable of being suspended on water for a long time and a preparation method thereof, aiming at realizing the purposes of isolating a medicament from water and having no toxic action on other organisms in the water.
In order to achieve the purpose, the invention adopts the following technical scheme.
The invention firstly adopts polypropylene oil absorption fiber to absorb allyl isothiocyanate to prepare the mosquito eradication material which can be suspended for a long time and can be recycled, and concretely, the allyl isothiocyanate is fixed on a suspensible carrier, and the mosquito eradication material is prepared by drying and solidifying and is fixed on the water surface, thus achieving the purposes of isolating (separating) medicament from water and recycling, and the specific method comprises the following steps:
1. the curing agent-containing allyl isothiocyanate material can be prepared from the following raw materials in percentage by weight:
0.5 to 5.0 percent of mosquito-killing young agent;
99.5-95.0% of curing (fixing) agent.
The mosquito killer active matter is food-grade allyl isothiocyanate, the effective content is more than or equal to 98.0%, and the standard of food additive allyl isothiocyanate of food safety standard of China GB299801-2013 is met. Manufactured by Tianbang seasoned food Co., Ltd, Pingxiang county. The solid loading capacity of the allyl isothiocyanate on the carrier is not particularly specified, because the used oil-absorbing polypropylene fiber cotton can load 5 times of oil by weight; the known 10-50ppm can kill mosquito larvae; the drug loading is in direct proportion to the duration of the product. The drug loading is generally 0.5-5.0%, or the loading of allyl thiocyanate is selected according to the requirements of customers.
The curing agent used is a vegetable oil, preferably tung oil, more preferably pure boiled tung oil, i.e.: frying the tung seeds, squeezing the obtained oil without adding any chemical components. The pure boiled tung oil is commercially available.
Tung oil is an excellent drying vegetable oil, and is a fatty acid triglyceride mixture. Has the characteristics of quick drying, light specific gravity, good glossiness, strong adhesive force, heat resistance, acid resistance, alkali resistance, corrosion resistance, rust resistance, non-conductivity and the like.
The tung oil is used as a diluent of allyl thiocyanate and a slow release agent of the allyl thiocyanate; thirdly, as a curing agent, allyl thiocyanate is cured on the oil absorption cotton felt.
The carrier is polypropylene oil absorption fiber, the types of the carrier comprise Jxy-DPP002 and Jxy-DPP005, the product comprises cotton felt, balls and coiled materials, the product is produced by flag power equipment Limited company of Pai of Bazhou city or oceanic engineering equipment Limited company of Zhejiang construction, and the performance of the product is as follows:
(1) the thickness of the oil absorption cotton felt in a fluffy state is 0.5 cm;
(2) the compacting/compacting thickness is about 0.25-0.3 cm;
(3) the weight of the oil absorbing cotton per square meter is about 550g (namely 550 g/m) in a fluffy state2）；
Maximum drug loading:
viscous type: such as tung oil and soybean oil, the maximum drug-loading rate is about 3-4 times of the self weight (no liquid)
Dripping, light squeezing and no liquid seepage);
low viscosity: such as tung oil and allyl isothiocyanate, and the maximum drug loading is the weight of the oil absorption fiber felt
5-6 times of the total weight of the product (no liquid dripping, no liquid seepage due to light extrusion);
adsorption speed:
absorbing the oil liquid by a plastic suction pipe, dropwise adding the oil liquid to the oil absorption fiber cotton felt, and observing the absorption speed.
Viscous type: for example, tung oil and soybean oil, 1 drop of oil is completely absorbed by the fiber, and the time is about 9-10 seconds.
Low viscosity: such as NMX, LGS, the fibers completely adsorbed 1 drop of oil, requiring less than 1 second.
Experiments prove that the liquid carrying amount (allyl isothiocyanate) is 2 times of the weight of the oil absorption fiber, the material is relatively dry and comfortable, drying is not needed, and meanwhile, the good extrusion resistance (no exudate during extrusion) can be maintained.
Weighing the raw materials according to the raw material formula requirements provided above, and putting the raw materials into a common stirring container to stir at a low speed (50-200 r/min) to obtain the tung oil-containing allyl isothiocyanate mosquito-killing young coating.
Further, according to the formula and the preparation method provided by the above, allyl isothiocyanate with different contents can be prepared, wherein the allyl isothiocyanate and the suspensible recyclable oil absorption fiber can be prepared according to the weight ratio of 1:1 or 2:1, and the allyl isothiocyanate and the suspensible recyclable oil absorption fiber can be prepared according to the weight ratio of 0.5-5.0%. It should be noted that the amount of the fiber loaded with allyl isothiocyanate that can be suspended is directly proportional to the persistence of the product. The higher the content of allyl isothiocyanate is, the longer the mosquito-killing effect can be maintained.
2. Preparation and application of allyl isothiocyanate suspendable/recyclable mosquito eradication material
2.1 preparation of the Material
And (2) spraying the allyl isothiocyanate containing the tung oil or the simple allyl isothiocyanate in the step (1) on the surface of the suspensible recyclable oil absorption cotton felt material by using an electric paint spraying gun. The maximum load drug amount of the suspension material is 550g/m2Can adsorb 5 times of oil by weight. In general, the weight ratio of 1:1 is selected to prepare the allyl isothiocyanate and suspendable oil absorption fiber composite material. The drug loading rate is 1:1, namely: 1 part by weight of allyl isothiocyanate is taken; 1 part by weight of the suspended material was taken. Uniformly spraying 1 part by weight of allyl isothiocyanate monomer or allyl isothiocyanate containing tung oil onto the surface of the suspension material, wherein the dosage is 20-50g per square meter. After the suspendable oil absorption fiber cotton felt or ball adsorbs allyl isothiocyanate, the natural drying is carried out, the appearance is fluffy and white, and the mosquito eradication material which can be suspended on the water surface for a long time and can be recycled is obtained by sealing and packaging.
The using method comprises the following steps:
the prepared mosquito eradication material which can be suspended and recycled is sealed and packaged by an aluminum foil bag in vacuum, and the volatilization of allyl isothiocyanate can be avoided. The product can be opened before use. Specifically, the product package is opened and taken out, and the suspensible and recyclable mosquito eradication juvenile material is fixed on the water surface, preferably in a water area near the bank, so that mosquito larvae moving on the water surface can be killed, and the multiplication of adult mosquitoes can be prevented. Allyl isothiocyanate and an oil absorption cotton felt 1; the mosquito eradication material prepared by the weight ratio of 1 can maintain the mosquito eradication effect for 2 months, and can be recycled and used again at the time.
The allyl isothiocyanate mosquito-killing young material capable of being suspended on the water surface is characterized in that the carrier is an oil absorption cotton felt prepared from a polypropylene raw material, and can also be a spherical body of 30-100 mm. Wherein, the spherical product is suitable for being applied in complex water environments such as weeds, paddy rice, reed and the like.
The allyl isothiocyanate containing the tung oil component and the prepared suspension material can ensure that the mosquito-killing young material can be suspended on the water surface for a long time, the insecticidal active substance is insoluble in water, can not poison aquatic organisms, and can be recycled.
Furthermore, the application of the suspensible and recyclable mosquito larva killing material of the invention is preferably, mosquito larvae include Aedes (Aedes), Culex (Culex), Aedes aegypti (Aedes aegypti), Anopheles (Anopheles), Anopheles annulata (Anopheles sangulipes), Aedes (Armigerers), Eisenia (Ayurakia), Anopheles (Bironella), Pothium (Borichonda), Phyllostachys (Chagasia), Coquilegia (Coquilletia), Culex fatua (Culex quinua), Culex circumvala (Culisata), Philippine (Pacifia), Fipalea (Sacalbia), Mollus (Haemagues), Collybia (Hemaninia), Pogosia (Hodgsia), mosquito marie (Kimipia), mosquito hooks (Malayia), Mollus (Trionyx), Orthophyceae (Toxophyceae), and Ortholes (Tolynchus).
The application concentration of allyl isothiocyanate is in direct proportion to the killing rate of mosquito eradication children.
Wherein, 0.005% (50 ppm) of allyl isothiocyanate acts for 12 hours, and the lethality rate to mosquito larvae can reach 99-100%; the allyl isothiocyanate with the content of 0.0025 percent (25 ppm) acts for 12 hours, and the lethality rate to mosquito larvae can reach 99 to 100 percent. Accordingly, the present invention suggests that the minimum use concentration of allyl isothiocyanate be 25 ppm.
The invention discloses a method for evaluating the drug effect of a tung oil-containing allyl isothiocyanate suspension material, which comprises the following steps:
(1) laboratory test method
Adopts a liquid medicine immersion culture method recommended by the World Health Organization (WHO) or an insect immersion method in SOP biological detection by southern pesticide creation center of China.
(2) Field test
According to the standard of GB/T31711-2015 'sanitary insecticide field efficacy determination and mosquito and larva killing agent evaluation'.
(3) Mosquito eradication raw material standard
Adopts the standard of national food additive allyl isothiocyanate of national food safety standard of GB 29980-2013.
(4) Standard of auxiliary materials
The auxiliary materials comprise tung oil and an oil absorption cotton felt (carrier), the tung oil is preferably pure boiled tung oil without additive components, and the product technical standard provided by production enterprises is adopted; the oil absorption cotton felt (carrier) is made of polypropylene fiber and adopts the product technical standard provided by production enterprises.
Compared with the prior mosquito eradication technology and raw materials or method, the invention has the advantages that:
(1) the applicant of the invention firstly adopts a liquid medicine separation method to load allyl isothiocyanate on the surface of polypropylene oil absorbent cotton fiber to prepare the allyl isothiocyanate mosquito-killing young material which is insoluble in water, can suspend and be recycled for a long time and has no influence on aquatic organisms, thereby solving the adverse influence and problem on aquatic organisms caused by improper use methods of active substances for killing the mosquito young.
(2) The invention adopts the tung oil, not only can fix the allyl isothiocyanate on the surface of the oil absorption fiber cotton felt which can be suspended and recycled, but also the tung oil has certain synergistic mosquito killing effect.
(3) The tung oil and allyl isothiocyanate compound has a reliable killing effect on mosquito larvae at a concentration of 25-50 ppm.
(4) The allyl isothiocyanate has better degradability and safety than chemical agents such as the thiodicarbamate and the like.
(5) The invention has important significance for solving the adverse effect of improper use methods of the mosquito larva active substances on water environment, reducing the number of mosquito larva populations and solving the problem of drug resistance of chemical mosquito killing agents.
Detailed Description
The features of the invention are further illustrated by the following examples.
EXAMPLE preparation of 150% Propylenyl isothiocyanate suspendable/recyclable mosquito repellent Material
First, 50 kg of 98% allyl isothiocyanate (produced by Nippon flavoring food Co., Ltd. in Pingxiang county) was weighed and prepared.
And secondly, weighing 50 kg of polypropylene oil absorption fiber cotton felt with the thickness of 5mm for later use. (the oil-absorbing fiber cotton felt is produced by Zhejiang Jianzhonghai engineering equipment Co., Ltd.)
And thirdly, uniformly spraying the weighed allyl isothiocyanate onto the polypropylene oil absorption fiber cotton felt by using a common electric paint spraying gun, immediately adsorbing the weighed allyl isothiocyanate by the oil absorption cotton, directly carrying out vacuum packaging by using a plastic bag without special drying and obtaining the product disclosed by the invention, wherein the appearance of the polypropylene oil absorption fiber cotton felt is not obviously changed.
The product has a lifetime of about 1.5 months.
Example 2 preparation of a suspendable Material containing Tung oil and 25% allyl isothiocyanate
Firstly, weighing 25 kg of pure boiled tung oil, weighing 2525 kg of 98% allyl isothiocyanate, and stirring and mixing by using a common stirrer for later use.
And secondly, weighing 50 kg of polypropylene oil absorption fiber cotton felt with the thickness of 5mm for later use. (the oil-absorbing fiber cotton felt is produced by flag electric power equipment Co., Ltd. of the city of Bazhou, Hebei)
And thirdly, uniformly spraying the tung oil/allyl isothiocyanate mixture prepared in the first step onto a polypropylene oil absorption fiber cotton felt by using a common electric paint spraying gun, immediately adsorbing the mixture by the oil absorption cotton, and directly carrying out vacuum packaging by using a plastic bag without special drying to obtain the product disclosed by the invention.
The product contains tung oil, and has embedding, stabilizing, slow-releasing and prolonged service life effects on allyl isothiocyanate. The service life is about 2-3 months.
Example 3 preparation of 2 times of allyl isothiocyanate mosquito repellent Material for oil absorbent Cotton
Firstly, weighing 50 kg of allyl isothiocyanate with the content of 98 percent and 50 kg of pure boiled tung oil with the content of 98 percent, and stirring and mixing for later use.
And secondly, weighing 50 kg of polypropylene oil absorption fiber cotton felt with the thickness of 5mm for later use.
And thirdly, uniformly spraying the weighed tung oil/allyl isothiocyanate mixture onto a polypropylene oil absorption fiber cotton felt by using a common electric paint spraying gun, adsorbing the mixture by oil absorption cotton without special drying, and directly packaging the mixture in a plastic bag in vacuum, thus obtaining the mosquito-killing young suspension material product.
The drug loading of the product is 2 times of that of oil absorption cotton (carrier), and the use validity period can reach 3-4 months.
Example 4 measurement of drug efficacy of suspensible and recyclable mosquito larvae control Material
The evaluation and results of the effect of killing young mosquitoes will be described by taking example 1 as an example.
1. Determination of the efficacy of indoor drugs
1.1 methods
The method adopts a medicine liquid immersion method recommended by the World Health Organization (WHO) or an insect immersion method in SOP biological detection of the southern pesticide creation center of China.
1.2 mosquito larvae to be tested
Is provided by the China center for disease prevention and control and infectious disease prevention and control, and comprises Aedes albopictus and Culex. The tested mosquito larvae are cultured at the temperature of 26 +/-1 ℃, the relative humidity of 70% +/-10%, and the photoperiod of L/D: culturing for 12 h/12 h, and selecting mosquito larvae of 2-3 years old with strong activity and consistent size.
1.3 test procedures
(1) Mosquito-killing young fibers capable of being suspended and prepared in example 1 are taken, the thickness of the fibers is 5mm, the area of the fibers is 2 x 2cm, and the number of the fibers is 1 for standby.
(2) A500 mL wide-mouth glass bottle was taken and placed in 300mL overnight of tap water for use.
(3) 30 larvae of 3 rd Aedes albopictus or Culex with strong vigor, robustness and consistent size are put into 500mL of wide-mouth glass bottle water, and the larvae of the Aedes albopictus normally swim on the water surface.
(4) Placing 2 x 2 cm-sized suspensible mosquito larvae into a wide-mouth flask with mosquito larvae, and suspending on the water surface.
1.4 test results
After 12 hours of action, the death rate of the mosquito larvae reaches 60-70 percent.
After 24 hours of action, the death rate of the mosquito larvae reaches 90-100 percent.
In the control group, 30 strong and consistent-size 3-year-old aedes albopictus or culex larvae are put into 500mL overnight water without mosquito larva suspension carriers and acted for 12h and 24h, and the death rate of the aedes albopictus and culex is 0.
2. Determination of pesticide effect of field mosquito eradication agent
2.1 test methods
The standard of national GB/T31711-2015 'sanitary insecticide field efficacy determination and mosquito and larva killing agent evaluation' is adopted.
2.2 test mosquito
The test mosquitoes in the field mosquito culture pond are provided by Shanxi Badun environmental protection technical research institute, and the area of each mosquito culture pond is about 1 m2The water depth is about 40cm, and enough wild 2-3 instar aedes and culex larvae are in the pool for testing.
2.3 dosage
4 pieces of mosquito eradication young suspension cotton felts with the size of 20 x 20cm are put on each square meter of water surface.
2.4 test results
After 12 hours of action, the death rate of mosquito larvae in the test pond is about 50-60%; after the test solution is acted for 24 hours, the death rate of mosquito larvae in the test tank is about 70-80 percent, the test solution is acted for 36 hours, and the death rate of the mosquito larvae in the test tank reaches 95-100 percent
3. Effect test of suspensible and recyclable mosquito eradication juvenile material on juvenile fish
3.1 juvenile Fish for testing
The test uses young fish and young shrimp purchased from a special farm, wherein the young fish is crucian fry, 200 tails and the body length is 0.5-1 cm.
The test conditions are in an outdoor culture pond and are protected by Shanxi Ba shield environment protection technologyThe research institute provides that each culture pond has an area of about 1 m2The water depth is about 40cm, 200 crucian fries with the body length of 0.5-1cm are put in the pool, and the experiment is carried out after 1 week of feeding.
3.2 dosage
4 pieces of mosquito eradication young suspension cotton felts with the size of 20 x 20cm are put on each square meter of water surface.
200-tail crucian fries with the body length of 0.5-1cm are put in the experimental culture pond, the water temperature is 25-27 ℃, and 4 mosquito eradication young suspension cotton felts with the size of 20 x 20cm are placed on the water surface.
In a control group culture pond, crucian fries with 200 tails and body length of 0.5-1cm are similarly cultured at the water temperature of 25-27 ℃, and instead of suspending cotton felts for killing mosquitoes on the water surface, 8mL of allyl isothiocyanate is dripped into the water, and the dosage of the suspending cotton felts for killing the mosquitoes is equal.
3.3 test result Observation
After 12 hours of action, no death of crucian fries in the test group (using mosquito eradication suspension cotton felt) culture pond is observed.
After 7 days of observation, no death phenomenon of crucian fries in the test group (using mosquito eradication suspension cotton felt) culture pond occurs.
After 12 hours of action, 16 crucian fries in the culture pond of the control group are observed to die and float on the water surface.
After the action for 36 hours, propylene isothiocyanate is dropwise added into the culture pond of the control group, and the death number of the crucian fries is 165.
4. Test (detection) of the amount of allyl isothiocyanate remaining in Water
4.1 according to
Appendix A of food safety national standard food additive allyl isothiocyanate according to Chinese national standard GB 29980-
4.2 methods
Determination of content of allyl isothiocyanate in appendix A of national standard GB 29980-2013 food safety national standard food additive allyl isothiocyanate
A.1 instruments and devices
A.1.1 chromatograph: according to the regulation of chapter 5 of GB/T11538-2006.
A.1.2 column: a capillary column.
A.1.3 Detector: a hydrogen flame ionization detector.
A.2 measurement method
Area normalization method: the content was determined according to 10.4 of GB/T11538-2006.
4.3 preparation and sourcing of samples
4.3.1 sample sources
Test samples were obtained from inventive example 1.
4.3.2 test procedure
(1) Mosquito-killing young fibers capable of being suspended and prepared in example 1 are taken, the thickness of the fibers is 5mm, the area of the fibers is 2 x 2cm, and the number of the fibers is 1 for standby.
(2) A500 mL wide-mouth glass bottle was taken and placed in 300mL overnight of tap water for use.
(3) 30 larvae of 3 rd Aedes albopictus or Culex with strong vigor, robustness and consistent size are put into 500mL of wide-mouth glass bottle water, and the larvae of the Aedes albopictus can swim freely on the water surface.
(4) Placing 2 x 2 cm-sized suspensible mosquito larvae into a wide-mouth flask with mosquito larvae, and suspending on the water surface. And after 24h, taking a water sample from the wide-mouth flask, and measuring the content of allyl isothiocyanate in the water according to a 10.4 area normalization method in GB/T11538-2006. As a result: it was not detected.
The technical principle, the preparation method and the application of the water suspension allyl isothiocyanate mosquito eradication agent are described in detail in the specification of the invention, and a person skilled in the art can easily 'invent' similar mosquito eradication products (variants) according to the teaching of the invention, for example, other known mosquito eradication agents or insecticidal active substances are loaded on a suspendable carrier, including the application variants that the parathion is loaded on the suspendable carrier to be harmless to aquatic organisms, and all belong to the protection scope of the invention.

Claims (7)

1. A recyclable mosquito eradication young material capable of being suspended on water for a long time is characterized by comprising allyl isothiocyanate (active matter), vegetable oil (curing agent) and suspendable oil absorption fiber (carrier): further, the allyl isothiocyanate adopts food-grade mustard oil to meet the national food additive standard; the vegetable oil can be one or combination of sunflower seed oil, peanut oil, soybean oil, rapeseed oil and Chinese parasol oil, preferably tung oil, and more preferably pure boiled tung oil without additives; the suspensible oil absorption carrier is an oil absorption cotton felt or ball prepared from polypropylene.
2. The recyclable mosquito eradication young material capable of being suspended on the water surface for a long time according to claim 1, which comprises the following raw materials by weight percent:
0.5 to 5.0 percent of mosquito-killing young agent;
99.5 to 95.0 percent of curing agent.
3. The recyclable mosquito eradication material as claimed in claim 1, wherein the oil absorption carrier capable of suspending on the water surface for a long time is a cotton felt, rope, strip or ball made of polypropylene fiber, which has good adsorption performance to allyl isothiocyanate and tung oil, and the tung oil has embedding, curing, slow release and lasting effect to the allyl isothiocyanate.
4. A preparation method of recyclable mosquito eradication young material capable of being suspended on water surface for a long time is characterized by comprising the following steps:
(1) weighing the raw materials according to the formula proportioning requirements provided by claim 2, putting the raw materials into a common stirring container for stirring at the rotating speed of 50-200r/min to obtain the tung oil component-containing allyl isothiocyanate mosquito-killing young coating:
(2) spraying the allyl isothiocyanate containing tung oil or the pure allyl isothiocyanate in the step 1 on the surface of a water suspension material (an oil absorption cotton felt) by using an electric paint gun; typically, the drug loading is 1 times that of the suspended material, i.e.: 1 part by weight of allyl isothiocyanate or allyl isothiocyanate containing tung oil is taken; taking another 1 weight part of suspension material; the allyl isothiocyanate or the allyl isothiocyanate containing tung oil is evenly sprayed on the surface of the suspension material and naturally dried to obtain the mosquito eradication suspension material.
5. The application of the recyclable mosquito eradication juvenile suspension material capable of being suspended on the water surface for a long time is characterized in that the mosquito eradication juvenile suspension material has no harm to other organisms in the water, including juvenile fishes/shrimps.
6. The use of a mosquito larvae material which can be suspended on water for a long period of time and recovered according to claim 5, wherein the target comprises Aedes (Aedes), Culex (Culex), Aedes aegypti (Aedes aegypti), Anopheles (Anopheles), Anopheles (Anopheles nnulipes), Anopheles (Armigers), Eisenia (Ayurakia), Anopheles (Bironella), Pogostemia (Borichida), Mosquilla (Chagasia), Coquilegia (Coquilettia), Culex fataricus (Culex quinquefasciata), Culex (Culexueruristris), Nemadia (Culiseta), Ficalalia (Ficalalia), Mosquilla (Haygogugus), Culex (Hemiyama), Hovenia (Kigelia), Orchis (Orchidia), Orchidia (Orchidia) and Orchidia (Orchidia) as, The mosquito larvae of the genera Cladosporium (Topomycea), Macrophyllus (Toxorhynchines), Prepelothrix (Trichoprosopon), Dilletia (Tripteroides), and Euonymus (Udaya).
7. Use of a recyclable mosquito larvae-killing material according to claim 5 or 6, wherein said mosquito larvae-killing material is recyclable.
CN202210168987.2A 2022-02-24 2022-02-24 Recyclable mosquito eradication young material capable of being suspended on water surface for long time and preparation method and application thereof Pending CN114467929A (en)

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CN108684699A (en) * 2018-07-06 2018-10-23 王渊 A kind of food-grade mosquito eradication children's preparation and its preparation method and application
CN112568235A (en) * 2020-12-11 2021-03-30 中国疾病预防控制中心寄生虫病预防控制所(国家热带病研究中心) Film spreading oil solution sanitary pesticide for killing mosquito as dengue fever vector infectious disease transmission vector and preparation method thereof
CN113040137A (en) * 2019-12-26 2021-06-29 武汉科诺生物科技股份有限公司 Application of biomass puffed particles as mosquito killing drug carrier
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN87104588A (en) * 1987-06-30 1988-03-16 上海市金山县东风涂料厂 Slow-releasing agent for killing larvel mosquito
CN1126543A (en) * 1994-08-04 1996-07-17 三共株式会社 Granular carriers and granular agrochemical formulations
CN1125508A (en) * 1994-08-05 1996-07-03 三共株式会社 Granular agrochemical formulations
CN1439033A (en) * 2000-04-28 2003-08-27 三共株式会社 Biodegradable foam having high oil-absorbing ability and floating on water surface, process for producing the same, and composition containing the same
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JP2012180297A (en) * 2011-02-28 2012-09-20 Kohendo:Kk Wriggler exterminating composition
CN104855428A (en) * 2015-04-21 2015-08-26 福建农林大学 Mosquito-killing bacillus thuringiensis floating agent and preparation method thereof
CN104920354A (en) * 2015-05-25 2015-09-23 南京农业大学 Pesticide water surface oil spreading film agent and preparation method thereof
CN108684699A (en) * 2018-07-06 2018-10-23 王渊 A kind of food-grade mosquito eradication children's preparation and its preparation method and application
CN113040137A (en) * 2019-12-26 2021-06-29 武汉科诺生物科技股份有限公司 Application of biomass puffed particles as mosquito killing drug carrier
CN112568235A (en) * 2020-12-11 2021-03-30 中国疾病预防控制中心寄生虫病预防控制所(国家热带病研究中心) Film spreading oil solution sanitary pesticide for killing mosquito as dengue fever vector infectious disease transmission vector and preparation method thereof
CN114403137A (en) * 2021-12-15 2022-04-29 赤天化科技集团有限公司 Capsule type water surface oil spreading film agent and application thereof

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