30results about How to "Protect food safety" patented technology

The invention discloses a Chinese medicinal composition for preventing and treating chicken diseases and a preparation method thereof. A medicament is prepared from fineleaf schizonepeta herb, divaricate saposhnikovia root, Chinese thorowax root, large-head atractylodes rhizome, honeysuckle flower, weeping forsythia, heartleaf houttuynia herb, isatis root, Chinese pulsatilla root, virgate wormwood herb, sweet wormwood herb, rhubarb, lightyellow sophora root, hairyvein agrimonia herb and bud and liquoric root in a certain weight ratio. The medicament has the effects of clearing away heat and toxic materials, strengthening body resistance, eliminating evil, nourishing yin, cooling the blood, discharging fire, eliminating dampness, killing parasites, resisting bacteria, diminishing inflammation, relieving dysentery with astringent, promoting qi circulation, relieving pain, warming the middle warmer, harmonizing stomach, warming kidney, enhancing yang, promoting digestion and opening spleen, can be used for effectively preventing and treating respiratory diseases, digestive tract diseases and protozoal diseases of chicken, and has a good effect. Raw materials for preparing the medicament belong to pure natural Chinese medicinal materials, so that the medicament has a small side effect, and chicken quality is improved. The medicament has the advantages of sufficient resources, simple preparation method and low cost.

The invention belongs to the technical field of sugar industries and discloses a sugar juice sulfur-free efficient cleaning method. After preliming, heating, foaming and flocculant adding are conducted on sugar juice, one-time floating clarification is conducted, large-particle non-sugar components in the sugar juice are removed; after secondary preliming, heating, foaming and flocculant adding are conducted on the one-time floating clarification sugar juice, secondary floating clarification is conducted; the sulfur-free cleaning process of the sugar juice is completed on the sugar juice obtained through secondary floating clarification through a sugar juice filtering and separating system. According to the sugar juice sulfur-free efficient cleaning method, the cleaning method of two levels of floating of the sugar juice is mainly adopted, and clean and complete sufur-free and carbonic-acid-free processing is achieved on the sugar juice, the equipment technology is simple, automatic continuous production is convenient, and the production efficiency is obviously improved. The obtained clean sugar juice is high in quality and is superior to clean sugar juice obtained through a traditional sulfurous method, and a very good application prospect is achieved.

The invention provides a special braided copper alloy wire for fishing nets for marine enclosure culture and a preparation method thereof. The wire comprises the following chemical components by mass percent: 58-75% of Cu, 0.4-1.8% of Sn, 0.2-0.5% of Si, 0.2-0.5% of Bi, not more than 0.004% of Pb, not more than 0.003% of Fe, not more than 0.0005% of Cd and the balance of Zn. The wire and the preparation method have the obvious advantages that the material is resistant to long-term seawater corrosion, is easy to braid and withstands force 25 hurricane blast; by adopting the process of replacing pulling with extruding, the blanks with high piece weights are obtained and the yield is increased; in addition, the production cycle is shortened, so that the wire is beneficial for popularization and application.

The invention discloses a method for treating seaculture wastewater by a marine polysaccharide dual-component flocculant, and belongs to the technical field of wastewater treatment. The method comprises the steps as follows: with chitosan and sodium alginate as raw materials, respectively preparing a chitosan component and a sodium alginate component, and respectively adding the chitosan component and the sodium alginate component into the wastewater so as to prepare the marine polysaccharide dual-component flocculant for treating the wastewater. The method particularly comprises the steps as follows: firstly, adding the chitosan component with the concentration of 1-1000 ppm into the wastewater, stirring for 5-10 min at a rotation speed of 400-500 rpm; and secondly, adding the sodium alginate component with the concentration of 1-1000 ppm into the wastewater, continuously stirring for 5-10 min at the rotation speed of 400-500 rpm, flocculating and settling to purify the wastewater. According to the method, natural active matters of marine organisms are utilized, the prepared marine polysaccharide dual-component flocculant treats the seaculture wastewater according to different proportions, the culture water quality can be improved, the discharged wastewater can be purified, the purified water quality index fully meets the safety culture level, and the clean culture and the harmless production are realized.

The invention relates to the field of animal feed, specifically to a full-automatic milk feeder for newborn livestock. The full-automatic milk feeder for the newborn livestock is composed of a feed box, a stirring box and a feeding unit, wherein the feed box is located above the stirring box, and the feed box and the stirring box are connected via a movable plate; the interior of the stirring box is provided with a stirring unit; and the feeding unit comprises a feeding pipeline and a feeding mouth, and a valve is arranged between the feeding pipeline and the feeding mouth. The full-automatic milk feeder for the newborn livestock provided by the invention realizes full-automatic feeding and does not need manual-stirring of materials; meanwhile, the milk feeder has the advantages of automatic batching, fixed-time feeding and automatic cleaning, so true full automation is achieved; material resources, human resources and financial resources are saved; bacterial reproduction is inhibited; and safety of liquid milk for the newborn livestock is guaranteed.

The invention discloses a real-time polymerase chain reaction (PCR) detection primer, a kit and a detection method for detecting puffer fish ingredients. The puffer fish gene detection primer and probes with the sequences of SEQ ID NO. 1-3 are designed according to the specific gene sequence of puffer fish, and the real-time fluorescent PCR method is adopted to qualitatively detect the puffer fish ingredients of food. The developed real-time fluorescent PCR qualitative detection method for detecting the puffer fish ingredients in food has importance significance in improving the detection efficiency and sensitivity of the puffer fish ingredients in food, lowering the detection cost, detecting related fake products on the market, monitoring food safety and improving a detection technology, and has wide development prospect.

The invention discloses artificial colostrum capable of improving survival rate of young newborn meat rabbits. The artificial colostrum is prepared by the following steps of using whole milk powder as basis, adding rabbit serum immunoglobulin, whey protein powder, glucose, lysozyme, complex enzyme preparation, multiplex vitamin of electrolyte, and trace elements, and uniformly mixing, so as to obtain the dry powder type artificial colostrum. The artificial colostrum has the advantages that the artificial colostrum can be used for replacing colostrum of a female rabbit, the problem of a newborn rabbit lacking of colostrum because the female rabbit has no colostrum or lacks of colostrum after giving birth to the newborn rabbits is effectively solved, the immunity of the young rabbit is obviously enhanced, and the survival rate of the young rabbit is improved.

The invention discloses lactobacillus ingluviei for efficiently inhibiting avian pathogenic Escherichia coli and an application of the lactobacillus ingluviei. The lactobacillus ingluviei is separated from healthy chicken flocks and is named lactobacillus ingluviei SCGZ-9 with the preservation number of CCTCC NO: M2015337. The lactobacillus ingluviei SCGZ-9 has good acid resistance and cholate resistance and can effectively adhere to intestinal cells and inhibit adhesion of the avian pathogenic Escherichia coli to the cells. A supernatant secreted by the lactobacillus ingluviei SCGZ-9 can inhibit growth and propagation of the avian pathogenic Escherichia coli. Thus, the strain can be applied to preparation of preparations for preventing and / or treating the avian pathogenic Escherichia coli or preparation of preparations for improving ecological balance of intestinal flora of birds.

The invention relates to an intelligent temperature control safety feeding bottle. The intelligent temperature control safety feeding bottle comprises a bottle body, a bottle neck and a suction nozzle; a bearing plate is arranged on the upper end of the bottle neck, and the bearing plate is combined with the bottle neck through screw threads; the lower surface of the bearing plate is provided with a temperature control layer; the temperature control layer expands with heat and contracts with cold; elastic current limiting plates are arranged below the temperature control layer, and the current limiting plates are made of a heat conductive material; the current limiting plates are arranged in rotational symmetry on the inner wall of the bottle neck, diversion holes are formed in the current limiting plates, and when the current limiting plates are perpendicular to the bottle neck, the current limiting plates are stacked in parallel in the vertical direction, meanwhile the diversion holes in the current limiting plates are communicated in a right-facing mode; when the current limiting plates are bent upwards or downwards, the diversion holes are staggered instead of being communicated; under the natural condition, the current limiting plates are arched upwards, and the diversion holes are staggered. The feeding bottle is novel and unique in structure, and can effectively guarantee the appropriate temperature of the drink, prevent from scalds and excessive coldness, give a baby the most intimate care, meanwhile relieve the burden of parents.

The invention relates to a backpack type normal temperature smoke pesticide sprayer. The backpack type normal temperature smoke pesticide sprayer comprises a pesticide sprayer body and a movable cable trailer. The pesticide sprayer body is detachably installed on the movable cable trailer and comprises a backpack rack. An atomization control box is installed on the backpack rack and provided with a handheld spraying assembly and a pesticide box assembly, the pesticide box assembly is arranged at the upper portion of the atomization control box, a pressure stabilizing device and an anti-deposition stirring device are arranged in the pesticide box assembly, an atomizer and a control and safety protection part are arranged in the atomization control box, the atomizer is communicated with a spray pipe, a pesticide conveying pipe is connected to the spray pipe in parallel and communicated with a pesticide box, and a handle switch assembly for controlling liquid pesticide to start flowing or stop flowing is arranged on the spray pipe. The backpack type normal temperature smoke pesticide sprayer has the advantages that electric energy serves as energy, the sprayer is not limited by special power when working in a greenhouse, spraying efficiency and pesticide spraying quality can be improved, pesticide is sprayed evenly, pesticide and water are saved, pesticide residue pollution is reduced, and the labor intensity of users is greatly relieved.

The invention discloses an antibacterial touch storage box cover plate for refrigerators, and relates to the technical field of a refrigerator storage box cover plate. The antibacterial touch storagebox cover plate for the refrigerators comprises a refrigerator storage box cover plate component and a storage box cover plate glass touchpad, wherein the refrigerator storage box cover plate component comprises a storage box glass shelf and a storage box glass shelf frame; the storage box glass shelf is matched and arranged in the storage box glass shelf frame and comprises a first glass substrate; one side face of the first glass substrate is orderly coated with an antibacterial coating and a dense protective coating from inside to outside; the storage box cover plate glass touchpad comprises a second glass substrate; and the outer surface of the second glass substrate is orderly coated with an antibacterial coating and a dense protective coating from inside to outside. As the outer surfaces of the refrigerator storage box cover plate component and the storage box cover plate glass touchpad are orderly coated with the antibacterial coatings and the dense protective coatings, the chance of bacterial infection, reproduction and cross-infection is reduced, and the antibacterial property of the storage box cover plate is improved.

The invention relates to the technical field of saline-alkaline soil improvement, in particular to an efficient water quality improver applicable to saline-alkaline soil mariculture; the improver is composed of, according to parts by weight, 50-150 parts of desulfurization gypsum, 20-60 parts of biodegradation enzyme composition, and 80-120 parts of natural and synthetic copolymer mixed improver. The improver of the invention enables clean culture and harmless mission for the industry of mariculture and is practically significant to the protecting and supervising marine environments and human food safety.

The invention discloses a method for separating and detecting diphenylamine and rhodamine B by using a gold nano channel. A PC (polycarbonate) membrane is used as a template, and gold is deposited on hole walls of the PC membrane template with nano aperture by adopting a chemical deposition method to obtain a functional hydrophobic gold nano channel; diphenylamine serving as a hydrophobic molecule easily passes through the hydrophobic gold nano channel; the rhodamine B is a cationic compound, belongs to a hydrophilic molecule and can not migrate in the hydrophobic gold nano channel; separation of the diphenylamine and the rhodamine B is realized according to the difference of the hydrophobic property of the two; the transmission quantity of each of the diphenylamine and the rhodamine B passing through the gold nano channel is detected by using an ultraviolet detector. The method can be applied to the fields of contemporary medicinal chemistry, agricultural chemistry, food chemistry and biochemistry, and is particularly used for separating carcinogenic substances such as food dyes and protecting food safety and body health.

The invention provides a multi-channel stored grain pest fumigant diffusion rate and pest killing efficiency evaluation device. The device comprises a fumigant diffusion ball, a rice filling pipe and a test insect bottle, the fumigant is filled in the diffusion ball; the rice filling pipe is filled with rice; two ends are blocked by breathable sand cores; the lengths of the rice filling pipes are different. The device is simple in structure, design is reasonable, when an evaluation test is carried out, the rice filling pipe simulates the hiding depth of pests, a plurality of independent variables are adjusted, change data of dependent variables such as pest stress response, pest activity, pest death, pest survival and the like are recorded; therefore, a test data analysis model is established, the evaluation of the diffusion rate and the insecticidal efficiency of the fumigant is realized, an accurate basis is provided for the application of the fumigant in the aspects of grain harm removal and grain storage, potential safety hazards in a granary are reduced, and the catering safety of people is protected.

The invention relates to an intelligent temperature control safety feeding bottle. The intelligent temperature control safety feeding bottle comprises a bottle body, a bottle neck and a suction nozzle; a bearing plate is arranged on the upper end of the bottle neck, and the bearing plate is combined with the bottle neck through screw threads; the lower surface of the bearing plate is provided with a temperature control layer; the temperature control layer expands with heat and contracts with cold; elastic current limiting plates are arranged below the temperature control layer, and the current limiting plates are made of a heat conductive material; the current limiting plates are arranged in rotational symmetry on the inner wall of the bottle neck, diversion holes are formed in the current limiting plates, and when the current limiting plates are perpendicular to the bottle neck, the current limiting plates are stacked in parallel in the vertical direction, meanwhile the diversion holes in the current limiting plates are communicated in a right-facing mode; when the current limiting plates are bent upwards or downwards, the diversion holes are staggered instead of being communicated; under the natural condition, the current limiting plates are arched upwards, and the diversion holes are staggered. The feeding bottle is novel and unique in structure, and can effectively guarantee the appropriate temperature of the drink, prevent from scalds and excessive coldness, give a baby the most intimate care, meanwhile relieve the burden of parents.

This patent relates to a backpack type normal temperature smoke sprayer, including sprayer and mobile cable trailer, the sprayer is detachably installed on the mobile cable trailer, sprayer includes a backpack frame, a backpack frame An atomization control box is installed on the atomization control box, and a hand-held spray assembly and a medicine box assembly are arranged on the atomization control box. The medicine box assembly is placed on the upper part of the atomization control box. The control box is equipped with an atomizer, control and safety protection components. The atomizer is connected with the spray pipe, and the spray pipe is also connected with a drug delivery tube in parallel. The drug delivery tube is connected with the medicine box. Broken handle switch assembly. The advantages are: this patent uses electric power as energy, and there is no special power restriction when working in the facility greenhouse, which can improve spraying efficiency and spraying quality, uniform spraying, save pesticides and water, reduce pesticide residue pollution, and greatly reduce the use of pesticides. labor intensity.

The invention belongs to the technical field of sugar industries and discloses a sugar juice sulfur-free efficient cleaning method. After preliming, heating, foaming and flocculant adding are conducted on sugar juice, one-time floating clarification is conducted, large-particle non-sugar components in the sugar juice are removed; after secondary preliming, heating, foaming and flocculant adding are conducted on the one-time floating clarification sugar juice, secondary floating clarification is conducted; the sulfur-free cleaning process of the sugar juice is completed on the sugar juice obtained through secondary floating clarification through a sugar juice filtering and separating system. According to the sugar juice sulfur-free efficient cleaning method, the cleaning method of two levels of floating of the sugar juice is mainly adopted, and clean and complete sufur-free and carbonic-acid-free processing is achieved on the sugar juice, the equipment technology is simple, automatic continuous production is convenient, and the production efficiency is obviously improved. The obtained clean sugar juice is high in quality and is superior to clean sugar juice obtained through a traditional sulfurous method, and a very good application prospect is achieved.

The invention discloses a safe beneficial-insect sheltering system and application thereof. The safe beneficial-insect sheltering system is characterized by comprising a safe chamber, an eclosion chamber, a heat preservation layer, an outer layer and a safety cover. The safe chamber is a movable and safe beneficial-insect state sheltering chamber, and the influence of extreme high temperature, extreme low temperature, chemical pesticides and other environments on populations is avoided. Eggs, pupa and other unmovable insect states of beneficial insects can be manually put in the eclosion chamber and are protected against the influence of severe environments, and the egg hatching rate and eclosion rate of the beneficial insects are improved; the outer layer is arranged around the heat preservation layer and is used for protecting the whole safe beneficial-insect sheltering system. The safety cover plays a sealing effect, ensures the microclimate of the system and facilitates safe living of natural enemy insects in poor environments. A variety of beneficial insects can live in the safe beneficial-insect sheltering system. The natural pest control effect of the beneficial insects is greatly improved, the using amount of the chemical pesticides can be decreased, and the ecological environment and food safety are protected.

The invention discloses a multiple pet feeding leakage-proof protection pet feeding appliance, and relates to the technical field of pet feeding. The multiple pet feeding leakage-proof protection petfeeding appliance comprises a base plate, an anti-skid mechanism is fixedly connected to the bottom of the base plate, a breathable cylinder box is fixedly connected to the middle position of the topof the base plate, a spiral flow guide groove is formed in the position, located on the outer side of the breathable cylinder box, of the top of the base plate, a separation carrier plate is fixedly connected to the top of the breathable cylinder box, an air pressure device is fixedly connected to the middle position of the top of the separation carrier plate, a driving mechanism is rotatably connected to the middle position of the bottom of the separation carrier plate, an auxiliary gear is in engaged transmission with the side, away from the separation carrier plate, of the outer surface ofthe driving mechanism, and a feeding mechanism is movably connected to the position, located on the outer side of the air pressure device, of the top of the separation carrying plate. The multiple petfeeding leakage-proof protection pet feeding appliance is stabilized by exerting force of a pet, the pet is fed in multiple directions, convenience and rapidness are achieved, limiting and positioning are achieved during eating, movement of the appliance is avoided, protection is achieved through the spiral guide groove, fodder is prevented from falling off, and the surrounding environment is kept clean.

The invention discloses a safe beneficial-insect sheltering system and application thereof. The safe beneficial-insect sheltering system is characterized by comprising a safe chamber, an eclosion chamber, a heat preservation layer, an outer layer and a safety cover. The safe chamber is a movable and safe beneficial-insect state sheltering chamber, and the influence of extreme high temperature, extreme low temperature, chemical pesticides and other environments on populations is avoided. Eggs, pupa and other unmovable insect states of beneficial insects can be manually put in the eclosion chamber and are protected against the influence of severe environments, and the egg hatching rate and eclosion rate of the beneficial insects are improved; the outer layer is arranged around the heat preservation layer and is used for protecting the whole safe beneficial-insect sheltering system. The safety cover plays a sealing effect, ensures the microclimate of the system and facilitates safe living of natural enemy insects in poor environments. A variety of beneficial insects can live in the safe beneficial-insect sheltering system. The natural pest control effect of the beneficial insects is greatly improved, the using amount of the chemical pesticides can be decreased, and the ecological environment and food safety are protected.

The invention discloses a tebuconazole pesticide-degrading bacterium, a soil bioremediation bacterium based on the bacterium and application thereof, belonging to the field of biotechnology. Its taxonomic name is Serratia marcescens H2 (Serratia marcescens H2). This strain is a Gram stain negative bacterium, and it is preserved in the China Center for Type Culture Collection (CCTCC), and the preservation number is CCTCC NO: M 2016478 , date of deposit September 13, 2016. The Tebuconazole Pesticide Residue Degrading Bacteria is a strain with strong degrading ability to Tebuconazole isolated from the soil where Tebuconazole has been used for many years through enrichment culture. The strain grows with Tebuconazole as the only carbon source. In the liquid medium, the activity of the bacteria is increased through the induction of tebuconazole, and the degradation ability of the tebuconazole is improved. The preparation method of the bacterial agent is simple, the cost is low, and the application is convenient. It can be scattered on the soil, and the degradation effect in the soil can reach 88%. important meaning.

The invention relates to metribuzin pesticide residue-degrading bacteria; the degrading bacteria are named as bacillus cereus N1 (Bacillus cereus N1) by classification, and are Gram-positive bacteria; a preservation number of the degrading bacteria in China Center for Type Culture Collection (CCTCC) is CCTCC NO: M2011163. Soil bioremediation microorganism prepared by the degrading bacteria and application are also disclosed. The metribuzin pesticide residue-degrading bacteria are bacterial strains which are obtained from sludge in a water spout of a insecticide factory for producing metribuzin and have strong degradation capacity to the metribuzin; the bacterial strains are grown by utilizing the metribuzin as exclusive nitrogen source; and thallus activity is increased by metribuzin induction in a liquid culture medium so as to improve the degradation capacity to the metribuzin. The microorganism provided by the invention is characterized by simple preparation method, relatively low cost and convenient implementation and can be dispersed on soil; degradation effect in the soil can reach to 68.19%; therefore, the microorganism has good application prospect.

The invention discloses a real-time florescent PCR (polymerase chain reaction) detection primer of fish composition in food, a kit and a detection method. The method comprises the following steps of: designing a primer for detection of fish genes and a probe SEQ ID (sequence identification) NO.1-3 aiming at the specific gene sequence of fish; and detecting fish composition in food quantitatively by adopting a real-time florescent PCR method. The real-time florescent PCR method quantitative detection method of fish composition in researched food has great significance for improving the detection efficiency and flexibility of fish composition in food, lowering the detection cost, detecting relevant false products in the market, monitoring food safety, and improving detection technique, and has wide development prospect.

The invention discloses a fumigation composition and an application thereof to the prevention and control of pests of volvaria volvacea. The fumigation composition for preventing and controlling the pests of the volvaria volvacea comprises the components in parts by volume: 1-2 parts of myrcene and 1 part of alpha-pinene; and the fumigation composition has prominent fumigation activity for the pests of the volvaria volvacea in an enclosed environment and is capable of preventing and relieving damage of the pests to mycelia of the volvaria volvacea. The fumigation composition disclosed by the invention belongs to a botanical insecticide and is easy to decompose, incapable of polluting the environment and safe to people and livestock; and the fumigation composition loses activity after deinsectization and cannot be accumulated in bodies of the pests or foods, so that the ecological environment and food safety are protected; and the fumigation composition is simple and feasible in preparation method, wide in raw material source, low in cost and suitable for large-scale production so as to be widely used for preventing and controlling the pests of the volvaria volvacea.

The invention discloses a real-time polymerase chain reaction (PCR) detection primer, a kit and a detection method for detecting puffer fish ingredients. The puffer fish gene detection primer and probes with the sequences of SEQ ID NO. 1-3 are designed according to the specific gene sequence of puffer fish, and the real-time fluorescent PCR method is adopted to qualitatively detect the puffer fish ingredients of food. The developed real-time fluorescent PCR qualitative detection method for detecting the puffer fish ingredients in food has importance significance in improving the detection efficiency and sensitivity of the puffer fish ingredients in food, lowering the detection cost, detecting related fake products on the market, monitoring food safety and improving a detection technology, and has wide development prospect.

The invention provides a special braided copper alloy wire for fishing nets for marine enclosure culture and a preparation method thereof. The wire comprises the following chemical components by mass percent: 58-75% of Cu, 0.4-1.8% of Sn, 0.2-0.5% of Si, 0.2-0.5% of Bi, not more than 0.004% of Pb, not more than 0.003% of Fe, not more than 0.0005% of Cd and the balance of Zn. The wire and the preparation method have the obvious advantages that the material is resistant to long-term seawater corrosion, is easy to braid and withstands force 25 hurricane blast; by adopting the process of replacing pulling with extruding, the blanks with high piece weights are obtained and the yield is increased; in addition, the production cycle is shortened, so that the wire is beneficial for popularization and application.

The invention discloses microwave synergistic sterilization assembly line equipment, and relates to the technical field of food processing. The device comprises a base plate, two portal frames are arranged on the base plate, a first rotating roller, a second rotating roller, a third rotating roller and a fourth rotating roller are rotationally arranged on the upper side of the base plate, three high-power pulse microwave sterilization instruments are arranged between the two portal frames, a supporting plate is rotationally matched between two cross beams, mounting plates are fixed to the lower side of the supporting plate, and a rotating rod is rotationally matched between the two mounting plates. A protruding block is arranged in the middle of the rotating rod. A second motor drives a rotating rod and a protruding block to rotate, a fixing plate is conveniently driven to transfer meat products to the upper side of a conveying belt located on the rear side, meanwhile, the meat products can be turned over, the meat products are conveniently supported by the protruding block to return to the state under the action of a spring, and through the action of a high-power pulse microwave sterilization instrument, the meat products can be conveniently sterilized. And the meat products placed on the upper side of the conveying belt can be conveniently sterilized and disinfected.

The invention relates to a leek maggot killing agent. The leek maggot killing agent comprise the following effective components in percentage by weight: 6-8 parts of sulphur, 1-2 parts of a high-efficiency dispersing agent, and 1-2 parts of a synergist. The leek maggot killing agent is prepared by taking the sulphur as a base component, adding the high-efficiency dispersing agent and the synergist and mixing, and crushing into 1800-2600-mesh superfine powder by using an airflow crushing device. The leek maggot killing agent is simple in production process and stable in product quality; after the superfine powder is mixed with water, the dispersibility is excellent and the suspensibility is high and a uniform and stable suspension is formed in water rapidly; the suspension permeates into the ground surface to contact a leek maggot body and corrode the leek maggot body so as to solidify proteins and block pores of the leek maggot body, a leek maggot is further killed; the leek maggot killing agent is lasting in effect, low in cost, safe, non-toxic, pollution-free and residue-free, not only reduces the burden of a leek farmer, but also has an important significance for environment protection and food safety.