66results about How to "Efficient insecticide" patented technology

The invention relates to a preparation method of a leaf vegetable insecticide. The preparation method comprises the following steps: adding 10-15kg of flos daturae, 8-10kg of aconite, 6-8kg of felwort, 8-12kg of coptis chinensis, 15-20kg of croton, 10-15kg of radix stemonae, 15-20kg of lithospermum and 14-18kg of thunder god vine into 200-300kg of water; boiling by high fire and decocting by soft fire till about 150-200kg of liquid medicine is left; filtering the liquid medicine; grinding 4-5kg of toad skins to fine powder and adding the fine powder to the liquid medicine to be mixed; after cooling to room temperature, adding 0.8-1kg of acetamiprid and 0.8-1kg of fipronil to stir and mix. The preparation method of the leaf vegetable insecticide provided by the invention takes the decoction decocted by traditional Chinese medicines as a main material and acetamiprid and fipronil as auxiliary materials, so that insects are efficiently killed and prevented with the kill ratio over 95%; the vast majority of the insecticide is traditional Chinese medicines, so that the insecticide is green and environment-friendly and free from pollution to the environment and crops.

The invention relates to the field of trapping or killing harmful insects, in particular to an air-suction and impaction combining type insecticidal lamp, which comprises a lamp holder, an insect trapping light source, an impaction plate, an insect suction fan, a fan drum and an insect storage bin. The insect trapping light source and the impaction plate arranged on the periphery of the insect trapping light are arranged on the upper end of the lamp holder; the lower end of the lamp holder is connected to the upper end of the fan drum; the insect suction fan is arranged in the fan drum; and the insect storage bin is formed on the lower end of the fan drum. The air suction and impaction combining type insecticidal lamp has the advantages of high efficiency, energy conservation, and capability of catching and killing big and small insects.

The invention discloses a wood preservative. The preservative comprises the following components, by weight, borate 15-45%, quaternary ammonium salt 6-15%, chlorothalonil 5-10%, cosolvent 4-10% and the balance solvent, wherein the solvent is one or a plurality of dimethylbenzene, glycerol and water, and the cosolvent is polyethylene glycol, urea formaldehyde preshrinking liquid or ethylene. The wood preservative is colorless, odorless, safe and environment-protection, simultaneously has the functions of corrosion prevention, mold prevention, insect prevention and antitarnish, and can rest assured use indoor and outdoor.

The invention relates to an agricultural ultrasonic atomization spraying device. The agricultural ultrasonic atomization spraying device comprises a sprayer barrel body for containing pesticide liquid and a closed device, wherein one or more ultrasonic atomizers capable of atomizing pesticide liquid are arranged in the closed device, a pesticide inlet, an air inlet and a mist outlet are formed in the closed device, the pesticide medicine inlet is connected with the barrel body, an air blower for blowing air in is connected to the air inlet through an air inlet pipe, the mist outlet is connected with a spraying pipe, and a sprayer nozzle for spraying vaporific pesticide liquid is arranged on an end opening of the spraying pipe. The surface of the liquid is swollen through ultrasonic directional pressure intensity, cavatition happens around the swollen liquid surface, the liquid is atomized into small molecule aerial fog, and therefore water molecules can directly act on the surfaces of crops through the aerial fog, spraying or fertilizer application or insect killing can be performed on the crops more effectively, water, pesticide, fertilizer and the like are saved, and the food safety problem caused by uneven pesticide spraying is prevented.

The invention discloses a special controlled-release insecticide fertilizer for sugarcanes. The special controlled-release insecticide fertilizer is prepared from the following substances in parts by weight: 40-60 parts of a main fertilizer, 0.5-1.5 parts of a microelement fertilizer, 2-5 parts of an antibacterial agent, 3-6 parts of an insecticide, 2-4 parts of a controlled-release agent and 20-30 parts of a filling agent. The controlled-release insecticide fertilizer disclosed by the invention comprehensively shows a continuous high-quality fertilizer effect and favorable pest preventing and controlling effects and can be used for increasing the yield of sugarcane stalks by 20-30% as comparison with a common fertilizer, the comprehensive pest occurrence rate is reduced by 30-40%, all the components can be naturally degraded in soil, soil hardening and other phenomena cannot be generated if the special controlled-release insecticide fertilizer is used for a long term, and the special controlled-release insecticide fertilizer has a favorable application prospect.

The invention discloses a plant pesticide. The plant pesticide is prepared from, by weight, 50 to 100 parts of phytolacca acinosa roxb. fruit, 20 to 30 parts of radix phytolaccae, 20 to 30 parts of rhamnus utilis, 15 to 20 parts of nerium indicum mill., 15 to 20 parts of rhododendron simsii planch., 5 to 10 parts of papaver rhoeas, and 5 to 10 parts of castor oil. The plant pesticide is prepared via combination of phytolacca acinosa roxb. fruit, radix phytolaccae, rhamnus utilis, nerium indicum mill., rhododendron simsii planch., papaver rhoeas, and castor oil, so that the plant pesticide is capable of reducing drug resistance of injurious insects, and killing injurious insects in a short time, and insecticidal range is wide; the plant pesticide is prepared from pure plant materials, so that absorption conversion of the plant pesticide by plants is easily realized, no chemical residue is left on crop products, influence on the environment is low, and the plant pesticide is capable of satisfying green environment protection requirements; and the raw materials are easily available and cheap, so that cost of the plant pesticide is reduced.

The invention relates to the use of alpha-terthiophene, in particular the use for the control of pine wilt disease, experimental investigation has shown that, when the when the concentration of the alpha-terthiophene is higher than 10-4g / L, the pine wilts can be poisoned within short period of time. The alpha-terthiophene can be applied to pine trees directly or with the compositions containing the alpha-terthiophene.

The invention discloses a preparation method of chloranthus angustifolius extractive and adopts the chloranthus angustifolius as raw material and is obtained by solvent extraction, supercritical extraction, microwave extraction, ultrasonic extraction, crushing extraction, steam distillation or extraction. The invention also discloses the application of the extractive in preparation of a pesticide and a bactericide. The invention can change the chloranthus angustifolius into useful substance to prepare a botanical extract with excellent insecticide and bactericidal activity, with significant effects on diseases and pest control. The preparation method of the invention is simple and easy and has lower cost and good prospects for application and generalization.

The invention discloses a corn seed coating agent, which relates to the seed coating agent, and is characterized in that the raw materials comprise 3.5-7.5% of film forming agent, 0.2-0.5% of plant-growth regulator, 1-2% of dispersant, 2-4% of wetting agent, 0.1-0.3% of thickening agent, 5-20% of antifreezing agent, 0.2-5% of warning color, 2.5-5% of pesticide and 13-23% of bactericide. Water is added in the film forming agent according to weight proportion of 1:29-13, and then raw materials are added and uniformly mixed and grinded. The bactericide thiram / tebuconazole are added with weight proportion of 10-20 / 3, and the pesticide is cypermethrin.

The invention is applicable to the field of insecticidal equipment, and particularly relates to a variable-frequency solar insecticidal lamp which comprises a lamp holder mounted on a lamp post. The lamp holder emits ultraviolet light through a lamp tube installed in the lamp holder to induce insects, and an intelligent controller connected to the lamp tube is used for adjusting and changing the lamp tube to emit the ultraviolet light with different wavelengths to induce different insects, wherein a high-voltage net arranged in a surrounding manner is arranged at the position, located on the periphery of the lamp tube, of the lamp holder, and the high-voltage net is used for catching and killing the insects induced by low-temperature plasmas generated by discharging of the ultraviolet light emitted by the lamp tube; in addition, the lamp tube and the high-voltage net are powered by a clean energy system; and the intelligent controller adjusts and changes the lamp tube to emit the ultraviolet light with the different wavelengths to induce the different insects, so that efficient insect killing is realized on the basis of energy conservation and environmental protection, treatment ofdifferent types of insects is realized, the variable-frequency solar insecticidal lamp can be well suitable for outdoor places, parks and squares, farmlands and regions without power sources and inconvenient to use, and the variable-frequency solar insecticidal lamp is wide in application range.

The invention discloses a green insecticide for forests. The green insecticide is prepared from the following raw materials in parts by mass: 4-6 parts of alocasia, 10-20 parts of dried chilies, 5-15 parts of coptischinensis, 15-25 parts of cowbanes, 8-10 parts of red halloysite, 15-25 parts of onions, 30-40 parts of gelsmium elegans, 4-6 parts of coriander seeds, 3-5 parts of moutan barks, 3-5 parts of gomphrena globosa and 6-10 parts of mints. The green insecticide is used for preventing and killing insects of the forests, replaces chemical pesticides and is green and environmentally friendly.

The invention discloses a botanical high-efficiency insecticide for plants and flowers, and a preparation method thereof. The pesticide is prepared from, by weight, 16-25 parts of wilfordine, 8-14 parts of root of Phytolacca acinosa Roxb, 6-11 parts of Rhamnus utilis, 7-11 parts of Baeckea frutescens L., 3-5 parts of Fructus Viticis, 4-7 parts of Crofton Weed, 2-6 parts of Eclipta prostrata, 15-21parts of matrine, 7-12 parts of tung oil tree seed oil and 6-12 parts of Radix Clematidis. The wilfordine, root of Phytolacca acinosa Roxb, Rhamnus utilis, Baeckea frutescens L., Fructus Viticis, Crofton Weed, Eclipta prostrata, matrine, tung oil tree seed oil and Radix Clematidis are effectively proportioned to prepare the insecticide, so the collection cost of the raw materials is low, and theinsecticide is simple and convenient to prepare, has very good insecticidal effects on rice, vegetables, fruit trees and tea trees, has no pollution to the environment, and meets green production requirements; and the insecticide also has the advantages of satisfactory protection of seedlings, effective killing of pests, small toxicity, and no influences on nursery stocks or human bodies.

The invention relates to a multifunctional insecticidal and antibacterial nutrient solution and a use method thereof, relates to an acetic acid-containing biocide, and especially relates to an acetic acid-containing biocide for preventing cloudy or rainy day output reduction. The purpose of the invention is providing the safe and nuisance-free multifunctional insecticidal and antibacterial nutrient solution. The multifunctional insecticidal and antibacterial nutrient solution comprises mature vinegar and brown sugar. A preparation method of the nutrient solution comprises the following steps: diluting the mature vinegar; dissolving brown sugar; and mixing above obtained solutions. The multifunctional insecticidal and antibacterial nutrient solution can inhibit breeding of various bacteria and rapidly provide nutrition absorption to simultaneously realize nutrition supply and sterilization, and the antibacterial ability and the insecticidal ability respectively reach above 85%; and the nutrient solution can be used on cloudy or rainy days in order to effectively avoid output reduction induced by cloudy or rainy days and improve the product output. The multifunctional insecticidal and antibacterial nutrient solution can be used in the fields of insecticides, sterilization and crop foliar nutrition provision in the agricultural plantation.

The invention discloses a novel wheat field composite bactericide and a use thereof. The composite bactericide comprises, by weight, 20-40 parts of sweet wormwood extract, 2-6 parts of a speader, 5-12 parts of naphthylacetic acid, 8-12 parts of brassinolide, 7-14 parts of high efficiency permethrin, 10-20 parts of a surfactant, 8-16 parts of a chlorone penetration enhancer, 5-10 parts of glycine, 10-20 parts of dichloromethane, 5-8 parts of Erodium stephanianum Willd., 10-20 parts of achnatherum inebrians, 5-10 parts of eucalyptus oleic acid, 1-4 parts of veratridine, 5-10 parts of humic acid and 10-20 parts of a polar organic solvent. The invention discloses the use of the bactericide in prevention and control of wheat diseases and promotion of wheat growth. The composite bactericide is prepared through simple processes, is environmentally friendly and does not pollute the environment. The novel wheat field composite bactericide is nontoxic, has high insecticidal effects, has a wide insecticidal spectrum and promotes wheat growth.

The production process of high-purity pyrethrin includes adding into the coarse pyrethrin extractive antioxidant BHT in the amount of 2-3 % weight of coarse pyrethrin extractive; dissolving in ethanol or methanol solvent in 5-7 times weight of coarse pyrethrin extractive at 25-30 deg.c for 1-1.5 hr before filtering to eliminate insoluble matter; freezing the solution at temperature below -20 deg.c; decolorizing the frozen liquid and concentrating to obtain ethanol or methanol concentrate while recovering ethanol or methanol; dissolving in petroleum ether solvent in 7-8 times weight of ethanol or methanol concentrate at 30-40 deg.c for 1-1.5 hr before filtering to eliminate insoluble matter; and concentrating to obtain high-purity pyrethrin while recovering petroleum ether solvent. The said process raises the content of pyrethrin in the product, reduces pollution and raises the safety of using the product.

The invention provides a botanical pesticide. The botanical pesticide is prepared from, by weight, 6-10 parts of agrimonia pilosa, 8-15 pars of pulsatilla chinensis, 4-8 parts of burdock, 2-3 parts of astragalus, 4-7 parts of portulaca oleracea, 10-15 parts of luffa leaves, 3-6 parts of tomato leaves and 20-30 parts of water. The materials are crushed, extracted and concentrated to obtain the finished product. According to the botanical pesticide, pests can be efficiently killed, the ingredients of the pesticide are all plants, and therefore the pesticide is green and environmentally friendly and does not pollute the environment and crops.

The invention discloses an externally applied liquid medicine for skin tinea and a preparation method thereof, which belongs to the technical field of medicine and drugs of the Yao nationality. The liquid medicine comprises the following active ingredients by weight: 20 to 22 parts of root of Rhamnus crenata which is used as a main drug and 15 to 17 parts of lightyellow sophora root which is used as an adjuvant drug. The preparation method comprises the following steps: putting the root of Rhamnus crenata and the lightyellow sophora root into a container and soaking the root of Rhamnus crenata and the lightyellow sophora root with 95% alcohol, wherein a ratio of the gross weight of the active ingredients to the weight of the alcohol is 1: 5; and sealing the container for 7 day and filtering out residues so as to obtain the externally applied liquid medicine for skin tinea. The externally applied liquid medicine for skin tinea has good fungus-killing, itching-relieving and skin wound-astringing effects and presents a total clinic treatment effective rate of 89% according to results of clinical application of the liquid medicine for 7 years.

The invention discloses a method for preparing chrysanthemum planting fertilizer by utilizing a rape seed cake and relates to the technical field of fertilizer production. The method for preparing the chrysanthemum planting fertilizer by utilizing the rape seed cake comprises the following steps: firstly sealing and fermenting the rape seed cake, grain stillage, dry feces of poultry and livestock, bitter gourd vines, rape stalks, brassica oleracea leaves and citric acid, so as to obtain a fermented material I, then mixing with bedding, shikimmi leaves, nettle, shepherd's purse and bean dregs, sealing and fermenting, so as to obtain a fermented material II, then preparing corncob, taro leaves, prepared rehmannia root, horseradish, kudzu vine powder, castor bean powder and seed powder of Chinese prickly ash into powder, and finally fully and uniformly mixing the fermented material II, the powder, sodium polyacrylate, zeolite powder and palm oil, so that the chrysanthemum planting fertilizer is obtained. The prepared chrysanthemum planting fertilizer contains abundant nutritional ingredients, is enough to supply of normal growth of chrysanthemum, lasting in fertility and high in utilization rate, has excellent insecticidal, bacterial, water-retaining and soil-loosening effects and can effectively kill toxic and harmful substances in soil to adjust the physical and chemical properties of the soil, so that the disease resistance of the chrysanthemum is improved, and the soil is protected.

The invention relates to a composite fungicide. The composite fungicide is characterized by being prepared from the following materials in parts by weight: 20 to 30 parts of sweet wormwood herb extract, 3 to 9 parts of naphthylacetic acid, 0.01 to 0.02 part of isopropyl palmitate, 0.001 to 0.01 part of polyglycerol-3 ricinoleat, 3 to 6 parts of cinnamyl aldehyde, 2 to 7 parts of bacillus subtilis, 3 to 7 parts of physcion, 1 to 3 parts of ethephon, 10 to 15 parts of surfactant, 10 to 15 parts of dichloromethane, 10 to 15 parts of achnatherum inebrians, 3 to 6 parts of humic acid, 8 to 15 parts of pimacol and 2 to 8 parts of herba geranii. The invention has the following advantages: a preparation process disclosed by the invention is simple, the process of preparation is environment-friendly and pollution-free, and the prepared fungicide is non-toxic, has a high fungicidal effect and a broad fungicidal spectrum, and can also promote the growth of crops.

The invention discloses a stable insecticidal device. The stable insecticidal device comprises a device body, wherein a transmission cavity with a rightward opening is fixedly formed in the device body, a connecting cavity which is formed in the device body communicates with the interior of the left end wall of the transmission cavity, and a replacement box is disposed in the connecting cavity; areplacement cavity with a rightward opening is fixedly formed in the replacement box, suction space which is formed in the device body communicates with the interior of the left end wall of the connecting cavity, and a curved solid is arranged in the left end wall of the suction space; an insecticidal box is fixedly arranged at the left end wall of the curved solid, an insecticidal chamber is formed in the insecticidal box, and a high-voltage power grid plate energized by a power-generating motor is fixedly arranged on the left end surface of the insecticidal box. The device has a simple overall structure, convenient and quick application and operation and convenient and quick movement, and a high-efficiency insecticidal process can be achieved, so that the insecticidal efficiency is increased greatly, a good insecticidal effect is achieved, and the device is suitable for popularization and use.

The invention discloses a safe insecticidal device which comprises a machine body, wherein a transmission cavity with a rightward opening is fixedly arranged in the machine body; a connection cavity located inside the machine body is formed inside the left end wall of the transmission cavity in a communicated manner; a replacement box is arranged in the connection cavity; a replacement cavity witha rightward opening is fixedly arranged in the replacement box; a suction space located inside the machine body is arranged in the left end wall of the connection cavity in a communicated manner; a bent solid is arranged inside the left end wall of the suction space; an insecticidal box is fixedly arranged on the left end wall of the bent solid, and an insecticidal cavity is formed inside the insecticidal box; a high-voltage grid plate for electrifying a power generation motor is fixedly arranged on the left end surface of the insecticidal box. The safe insecticidal device disclosed by the invention is simple in overall structure and convenient and quick to use and operate, and can realize an efficient insecticidal process and move conveniently and quickly, so that the insecticidal efficiency is greatly improved; furthermore, the safe insecticidal device is good in insecticidal effect and suitable for being popularized and used.

The invention discloses an air quality monitoring system. The system includes a fixed base, a supporting stand column is fixed on the fixed base, a monitor main body for monitoring the air quality ismounted at the top end of the supporting stand column, a longitudinal waste discharge channel is formed in the supporting stand column, the air quality monitoring system is different from the prior art, a pest killing mechanism based on a trap lamp technology Is adopted, the trap lamp adopts a visible light source, while high-efficiency insect trapping is ensured, a lighting or warning effect canalso be achieved at night, the problem of night collision of the supporting column is avoided, the supporting column is internally equipped with the longitudinally-communicated longitudinal waste discharge channel, so that winged insect corpses can be conveniently treated, meanwhile, the longitudinal waste discharge channel can be automatically cleaned at regular intervals, accumulation and blockage are avoided, and a rainwater collecting structure is also arranged to assist cleaning, therefore effective insect killing is guaranteed, and efficient monitoring of the monitor main body in a continuous use process is guaranteed.

The invention provides a nicotine compound containing double benzene and a preparation method and use thereof. The nicotine compound containing double benzene has the structural formula shown in the specification. The invention discloses a formula of the nicotine compound containing double benzene, the preparation method and use for insecticide. The compound can be used for killing larva and adult in lepidoptera, homoptera, coleoptera and orthoptera.

The invention relates to the field of concrete, and particularly discloses underwater concrete and a preparation method thereof. The underwater concrete is prepared from the following raw materials in parts by weight: cement, sand, gravels, water, a flocculating agent, a water reducing agent and modified composite fibers, the modified composite fiber is prepared by the following method: weighing basalt fiber and polyurethane fiber, and mixing to obtain composite fiber; weighing a chitosan film solution, and spraying the chitosan film solution on the surface of the composite insecticidal powder to prepare coated micro powder; placing the coating micro powder on the surface of the composite fiber, stirring and and mixing, and drying to obtain a modified composite fiber; the preparation method of the underwater concrete comprises the following steps: weighing the cement, the sand, the gravel and the water, mixing and stirring to obtain a mixture; weighing a flocculating agent, a water reducing agent, the modified composite fiber and the mixture, mixing and stirring, and curing to obtain the underwater concrete. The product has the advantage that the strength of the underwater concrete is prevented from being influenced by penetrating transverse cracks on the surface and in the concrete.

The invention discloses a solar insect killing lamp with good heat radiating performance and high insect killing efficiency. The solar insect killing lamp comprises an insect killing lamp body, wherein the insect killing lamp body comprises a rain cover, an insect collecting tray and an insect inducing lamp tube arranged between the rain cover and the insect collecting tray; a reflective cover is arranged in the rain cover; an airtight space is formed between the rain cover and the reflective cover; the airtight space is separated into a plurality of independent cavities by partition boards, and the cavities are filled with working fluid; a plurality of nanometer carbon tubes for connecting the rain cover and the reflective cover are arranged in the cavities; the periphery of the insect inducing lamp tube is sequentially provided with a light transmitting conductive film and an insect killing net; and the light transmitting conductive film is electrically connected with the insect killing net. The solar insect killing lamp of the structure effectively improves insect killing effect and efficiency and is good in heat radiating performance.

A microbial insecticide and a preparing method thereof are disclosed. Raw materials of the microbial insecticide comprise, by weight, 4-6 parts of a bacillus thuringiensis liquid, 2-4 parts of organosilicone, 8-12 parts of tripterygium wilfordii, 8-10 parts of strychnos ignatii, 3-5 parts of a beauveria bassiana liquid, 3-5 parts of garlic bolts, 8-10 parts of garlic, 2-4 parts of beauveria tenella, 6-8 parts of a tobacco leaf chelating liquid, 2-4 parts of compound sodium nitrophenolate, 15-25 parts of a liquid of photosynthetic bacteria and 200 parts of water. The microbial insecticide is used for pest control and killing for crops, replaces chemical pesticides and is green.

The invention belongs to the technical field of pesticide preparation research and development, and particularly relates to a traditional Chinese medicine pesticide and a preparation method thereof. The traditional Chinese medicine pesticide is characterized by being prepared from, by weight, 15-30 parts of snake slough, 15-30 parts of earthworm, 25-50 parts of belladonna, 10-20 parts of resina populi, 10-25 parts of fructus xanthii, 10-20 parts of polygonum aviculare, 9-15 parts of storax, 25-50 parts of Chinese torreya, 15-30 parts of camphor, 5-15 parts of aloe, 5-15 parts of stork's bones, 5-15 parts of Chinese honey locust seeds and 10-20 parts of musk. The natural traditional Chinese medicine raw materials serve as the main components, are reasonable in compatibility, and synergistically interact; the liquid pesticide is short in residence time in crops and can be automatically converted into fertilizer in soil; the traditional Chinese medicine pesticide is environmentally friendly, healthy and easy and convenient to use, and has the advantages of being low in toxicity, safe and low in cost; the traditional Chinese medicine pesticide has good insect-killing, insect-repelling and plant-promoting effects on crops, can prevent and treat diseases and is wide in application range.

The invention relates to a special insecticide for rice and a preparation method thereof. The raw materials comprise the following components in parts by weight: 2-5 parts of nicotine, 4-8 parts of pyrethrin, 2-4 parts of TBHQ, 5-12 parts of azadirachta indica, 20-30 parts of emamectin benzoate, 5-9 parts of cocoanut fatty acid diethanolamide, 2-5 parts of hot pepper, 3-10 parts of garlic, 2-5 parts of thiodiacrylate and 8-10 parts of deionized water. The insecticide provided by the invention is easily available in material, low in cost, free of influence on the environment, insecticidally super-efficient, nearly non-toxic, low in residue, pollution-free and green and environment-friendly, maintains normal production of rice, does not harm the quality of soil, keeps acid-base equilibrium, is strong in anti-oxidizing capacity, the service life is prolonged, and the insecticide is high in stability, good permeability and good in uniform effect.

Annoying insects are controlled by attaching an insect control device to the body of the animal to be treated. The insect control device is a molded article, preferably in the form of an ear tag, which has been formed from a powder mixture of coumaphos and diazinon, polyvinyl chloride, and a plasticizer. The coumaphos and diazinon are generally used in an amount that would prolong the insecticidal activity without detracting from the suitability of the device.

The invention discloses an antimicrobial deodorant medical cotton swab containing neem oil. The antimicrobial deodorant medical cotton swab comprises a cotton swab and composite fiber cotton wrapping the end of the cotton swab. The cotton swab uses renewable and degradable composite polylactic acid fiber cotton to replace the traditional absorbent ball so that a production cost is reduced. Through use of seaweed charcoal, polyvinylpyrrolidone and neem oil, the composite polylactic acid fiber has good hydrophilicity and health effects of resisting bacteria, killing injurious insects and promoting wound healing and has good biocompatibility. In addition, the fiber surface is modified with polydopamine-calcium alginate gel so that an adsorption capacity is high and wound cleaning effects are good. A production process of the cotton swab is simple and efficient, materials used in all processes can be recycled, and adverse influence on the environment is avoided.