719results about "Fumigators" patented technology

The invention provides a fumigation control method based on pest and disease damage trend prediction, and the method comprises the steps: carrying out the spectrum analysis of audio data information through employing a fast Fourier transform algorithm, extracting the frequency domain feature vector of the chirp sound of each pest species, and enabling the frequency domain feature vector to comprise a fundamental frequency, harmonic energy distribution, chirp duration and chirp rhythm; according to the extracted chirp frequency domain feature vector, chirps of local main agricultural pests are identified and classified by adopting a support vector machine algorithm, and the types and life cycle information of the pests are judged by matching with a preset pest species chirp feature template library; and performing spatial mapping on the predicted population density distribution data by adopting a Kriging interpolation algorithm to generate a spatial distribution diagram, determining the aggregation degree and diffusion trend of pests in each region of the field, and dividing a plurality of prevention and control regions and buffer regions.

The invention relates to the technical field of intelligent prevention and control of agricultural pests, in particular to a monitoring, trapping and killing method for field fruit fly pests, and adopts the technical scheme that the top is fixed through an adjustable hook, the pests are attracted by a food attractant to be in contact with an annular pulse power grid, the shot-down pests enter a pest receiving device through a funnel, and the quantity is counted in real time by an infrared counter; the adjustable hook is provided with an anti-rotation buckle structure, the tail end of the anti-rotation buckle structure is integrated with a spiral anti-bird thorn, the hanging stability is improved, a solar panel is adopted for automatically tracking illumination, the electricity utilization cost is saved, and potential safety hazards are reduced; a food attractant constant-temperature slow-release system is constructed through a PTC constant-temperature heating piece, the optimal volatilization temperature is maintained, the trapping and killing efficiency is improved, real-time analysis and remote transmission of insect situation data are supported through an environment sensor and an edge calculation algorithm, and the problems that a traditional trap is low in efficiency, high in mistaken trapping rate, lagged in data feedback and the like are solved. The method is suitable for precise monitoring and green prevention and control of field fruit flies.

The invention relates to the technical field of grain storage, in particular to a bidirectional rotatable damp-proof intelligent wheat storage bin which comprises a storage bin body, a storage cover, a fixing rod and the like. The storage bin is detachably connected with a storage cover; the side wall of the storage bin is made of a metal net, and a discharging hole for discharging wheat is formed in the bottom of the storage bin; a plurality of fixing rods are fixedly connected to the storage bin; a first sliding groove is formed in each fixing rod, and a first electric sliding block is slidably connected into each first sliding groove. According to the device, the partition pieces rotate clockwise to enable the corresponding grooves to be communicated with the through grooves, aged wheat is transferred to the position below the partition plates, then the partition pieces rotate anticlockwise to enable the corresponding grooves not to be communicated with the through grooves, the aged wheat is completely separated, and new wheat is placed above the partition plates; the aged wheat and the new wheat are stored in the same storage bin, and the time consumed for manually transferring the aged wheat is shortened.

The invention relates to the technical field of vehicles, and discloses a vehicle control method and device, computer equipment and a storage medium. The method comprises the steps that the current distance between a target passenger waiting for getting on the vehicle and the vehicle is determined; under the condition that the current distance meets the pre-mosquito-repelling condition, a mosquito-repelling system of the vehicle is controlled to be started so as to release mosquito-repelling substances; and after the mosquito repelling system is started for a first preset duration, an air conditioning system of the vehicle is controlled to start external circulation. Before a target passenger gets on the vehicle, the mosquito-repelling substances can be released by the mosquito-repelling system, the air conditioning system is controlled to start external circulation, the mosquito-repelling substances can be discharged out of the vehicle, and an area with the mosquito-repelling substances is formed around the vehicle; when the target passenger opens the vehicle door to get on the vehicle, mosquitoes can be effectively prevented from entering the vehicle when the vehicle door is opened, and the possibility that the mosquitoes enter the vehicle is greatly reduced.

The intelligent fumigation warehouse inspection robot comprises a propelling frame, a bottom frame and a releasing frame which are connected in sequence, a medicament outer box is installed in the middle of the upper surface of the bottom frame, and a control panel is embedded outside the medicament outer box; the intelligent fumigation in the granary is jointly realized by taking a measure of combining continuous medicament loading and fixed-point medicament distribution, and targeted and accurate medicament application is performed through intermittent release and fixed-point medicament distribution after medicament loading, so that the fumigation effect in the granary is unified; in combination with parameter measurement of a gas fumigation comprehensive value and a pesticide application point position distribution value, the distribution condition of fumigation point positions and the distribution condition of the pesticide amount in the current granary are judged according to a granary patrol fumigation coefficient, and the distribution positions of the fumigation point positions and accurate infusion of the pesticide amount are correspondingly controlled; the problems that due to season change and grain condition parameter change, the concentration of phosphine gas in a granary is not uniform, and pesticide application accuracy is limited are solved, and grain storage safety is greatly guaranteed.

The invention relates to a thermal active volatilization device and a portable volatilization system, and belongs to the technical field of volatile liquid diffusion devices. Comprising an electric heating core rod; the volatilization core rod is provided with an inner cavity, and the control circuit is connected with the power supply and used for controlling charging and discharging of the power supply; the power supply and the control circuit are arranged in the battery cabin; the output end of the control circuit is electrically connected with the electric heating core rod; in the using state, the electric heating core rod is arranged in the inner cavity of the volatilization core rod. Through the synergistic effect of continuous heat energy supply and inner cavity design, the device can achieve rapid volatilization and uniform diffusion of liquid within a short time, and the requirements of various application scenes such as insect repelling, fragrance diffusion or air purification are met.

A lightweight barrier insert door is attached to an enclosure, such as a shipping container that holds a product to be fumigated, such as during transport of the product to a new location. The barrier insert door fits within the doorway of the container to provide a sealed barrier to mitigate leakage of a fumigant from the interior of the container. The barrier also includes air intake ports to maintain the structural integrity of the container and to provide ambient air to the interior. Additional ports allow for connection for fumigant entry, monitoring, and / or an exhaust hose to be connected to or through the barrier for the fumigation process. The barrier can be height adjustable to account for shipping containers of various sizes and can be connected with fumigant exhaust and release systems for the safe release thereof.

A pesticide canister assembly includes a canister housing configured to receive a canister containing a pesticide, an actuator fixed to the canister housing, and a retrieval string coupled to the actuator. The actuator is configured for selective movement from a non-actuated position, whereat the canister is not activated to dispense the pesticide, to an actuated position, whereat the canister is activated to dispense the pesticide. The retrieval string is coupled to the actuator, wherein the retrieval string is configured to selectively move the actuator from the non-actuated position to the actuated position, and wherein the retrieval string is configured to retrieve the canister housing.

A multipurpose machine for cultivating trees, comprising an inverted U-shape structure that enables the machine to pass over existing trees to carry out pruning, disinfection or fruit picking tasks, provided at the bottom with wheels, driven by at least one motor that autonomously facilitates the movement thereof, and respective upper frames that telescopically couple to each other, being driven by respective cylinders to move the portion of the structure on the right with respect to the one on the left in order to vary the width of the machine. Likewise, the machine has the ability to raise or lower the upper structure of the same to adapt it to the height of the trees to be cultivated.

The LED lamp comprises a lamp pole, an LED lamp tube is installed on the upper portion of the lamp pole, an outer rhombus lampshade is connected to the upper portion of the lamp pole, a cleaning mechanism used for cleaning the outer surface of the outer rhombus lampshade is arranged on the upper portion of the outer wall of the lamp pole, a cavity is formed in the upper portion in the lamp pole, and an air inlet communicated with the cavity is formed in the top of the outer rhombus lampshade. Exhaust holes communicated with the cavity are formed in the upper portion of the lamp pole in the circumferential direction at intervals and located below the outer rhombus lampshade, and a heat guiding-out mechanism used for guiding out heat in the outer rhombus lampshade is arranged in the cavity. The scraping plate A and the scraping plate B rotate to scrape away dust, mosquito secretions and other impurities accumulated on the outer surface of the outer rhombic lampshade, so that the outer surface of the outer rhombic lampshade is automatically cleaned, internal and external exchange of gas can be achieved through cooperation of a fan, an exhaust pipe, a gas conveying pipe and a conical blocking block, the gas in the outer rhombic lampshade circulates, and therefore the effect of cleaning the outer rhombic lampshade is achieved. Therefore, heat in the outer rhombic lampshade can be automatically led out.

The invention solves the problem that phosphine gas is not uniformly distributed in a granary, and relates to the technical field of grain deinsectization, in particular to a phosphine generator for grain deinsectization, which comprises a granary and a phosphine generation mechanism, a gas distribution pipeline rotationally connected with the output end of the phosphine generation mechanism is arranged in the granary, and the phosphine generation mechanism is arranged in the granary. A plurality of gas guide assemblies are installed on the gas distribution pipeline, a driving structure in transmission connection with the gas distribution pipeline is arranged on one side of the phosphine generation mechanism, and the driving structure drives the gas distribution pipeline to rotate at a low speed to control the gas guide assemblies to dynamically cover the area in the granary; a steel mesh is arranged on the spray head branch pipe in a sleeving mode, a pushing structure is installed on the steel mesh, and when the gas distribution pipeline rotates at a low speed to feed hydrogen phosphide gas, part of grain in the granary naturally passes through the pushing structure from top to bottom so as to increase contact with the hydrogen phosphide gas. According to the invention, the permeation uniformity and efficiency of the hydrogen phosphide gas in the granary can be effectively improved.

The invention discloses an LED lighting device driven by linear dimming. The LED lighting device comprises a lamp holder and a lamp. The lamp is installed in the inner wall of the lamp holder, a support is arranged on the upper surface of the lamp holder, a protective insect repelling device is arranged on one side of the lamp holder and comprises a frame, the frame is fixedly connected with the lamp holder, a servo motor is fixedly connected to the inner wall of the frame, fan blades are fixedly connected to the driving end of the servo motor, and a spray pipe is fixedly connected to one side of the lamp holder. Mothballs and other insect repelling drugs are placed in the material groove and heated through hot air sprayed out of the spraying pipe, smell diffusion is accelerated, mosquitoes can be powerfully repelled, the environment around the lamp is kept clean, the situation that the lighting attractiveness and the lamp performance are affected due to mosquito corpse accumulation is reduced, meanwhile, the lamp is cooled and dissipated, and meanwhile the lamp is protected against damage to the environment. And the generated air flow can be used for heating the insect repellent, so that the utilization efficiency of energy is improved, the normal heat dissipation of the lamp is ensured, the service life of the lamp is prolonged, and the insect repellent effect is enhanced.

The utility model discloses a mosquito repelling fan which comprises a supporting base and a fan device. The supporting seat is provided with an electric control device, an installation space is formed in the supporting seat and penetrates through the two opposite sides of the supporting seat, an installation position is arranged at the upper end of the installation space, a heating position is arranged above the position, corresponding to the installation space, in the supporting seat, a heating piece is arranged in the heating position, and a receding hole is formed in the supporting seat and communicated with the heating position and the installation space. The mounting position is used for mounting bottled electric mosquito-repellent incense liquid, and the avoiding hole is used for avoiding a liquid guide core of the electric mosquito-repellent incense liquid; the fan device is arranged at the upper end of the supporting base and connected with the electric control device. According to the technical scheme, the mosquito repelling fan improves the mosquito repelling effect.

An improved process for applying herbicides, insecticides and the like, as an aerosol or vapor using a thermal fogging apparatus. Particular methods can be performed through use of a programmable logic controller (PLC) that receives data and controls the main components of a thermal fogger system.

The utility model provides a granary circulation fumigation structure which comprises a granary, an isolation plate is arranged in the granary, the aperture of the isolation plate is smaller than the size of grains, a sliding column is arranged at the lower end in the granary, two sliding blocks are arranged on the outer arc face of the sliding column in a sliding mode, and cavity plates are rotationally arranged at the rear ends of the two sliding blocks through rotating shafts. Air outlet pipes are arranged in air outlet holes evenly distributed in the upper ends of the two cavity plates, the two cavity plates are connected through a communicating pipe, a liquid medicine box is arranged on the left side of the granary, a liquid inlet pipe is arranged in a through hole formed in the lower end of the liquid medicine box, a moving mechanism is arranged at the lower end in the granary, and an anti-sedimentation mechanism is arranged in the liquid medicine box. According to the granary circulation fumigation structure, the anti-precipitation mechanism can stir and prevent liquid medicine from precipitating, so that the components of the liquid medicine are uniformly dispersed, the generation and release of fumigation gas are stable and consistent when the medicine is applied, and uniform fumigation concentration is favorably formed in a whole grain pile.

Devices and methods are presented that allow for deployment of an insecticide- or repellent-laden ground fog, especially for residential or agricultural use. Devices presented herein are particularly advantageous to temporarily and locally eradicate or control Aedes aegypti, Culex spec., and Anopheles spec. in a residential, healthcare, or agricultural setting. Beneficially, contemplated systems and methods allow for directional as well as non-directional application of an insecticide or insect repellent in a conceptually and technically simple manner.

The invention provides an in-vehicle mosquito repelling control method, system and device and a vehicle. The method comprises the steps that a cabin controller obtains a user operation instruction and drives an ultrasonic probe and a camera to detect whether mosquitoes exist in the vehicle or not; and if mosquitoes exist in the vehicle, the cabin controller enters a mosquito repelling mode, and in-vehicle mosquito repelling operation is executed. The information is actively pushed to the user in advance according to the specific scene, the mosquito repelling mode is suggested to be executed or enter, the mosquito repelling action is performed in advance, the user does not need to actively operate after getting on the vehicle, the waiting and tolerance time in the mosquito repelling process is shortened, convenience and intelligence are improved, and the vehicle using comfort is improved.

The invention relates to a device for dispensing volatile substances, having a housing (2), a container (5) for the substance to be dispensed, a wick received in the container (5) and protruding from the container (5) with a wick end (6) forming a substance dispensing area, and further having an electrical heating device (8) which has an electrical heating circuit, the heating device (8) being displaceable relative to the wick end (6) in order to set a substance delivery rate. According to the invention the electrical heating circuit of the heating device (8) comprises a thermoswitch (16) being openable by heat exposure at a predetermined switching temperature and being arranged at a distance from the wick end (6), the thermoswitch (16) being switchable as a function of the distance between the heating device (8) and the thermoswitch (16).

The utility model discloses a sulfuryl fluoride local fumigation device which comprises a sulfuryl fluoride gas bottle, a flow controller, a gas flow uniformizing part, an electric control cabinet and a local fumigation pesticide applying pipe. The flow controller is communicated with a bottle opening of the sulfuryl fluoride gas bottle through a hose; the gas flow uniformizing part is communicated with the flow controller through a hose; the electric control cabinet is detachably connected to the frame of the gas flow uniformizing part and electrically connected with the flow electric control cabinet and the gas flow uniformizing part. The plurality of local fumigation pesticide application pipes are communicated with the gas flow uniformizing part through hoses; the device has the advantages that the concentration of the introduced sulfuryl fluoride gas is diluted by adopting a mode of mixing the air with the sulfuryl fluoride gas, so that the lethal dose of stored grain pests is accurately reached, the medicament waste is avoided, and compared with the original mode of directly introducing the sulfuryl fluoride gas, the use amount of the sulfuryl fluoride gas is effectively reduced, the fumigation cost is saved, and the environment is protected. And the use amount of the sulfuryl fluoride gas is small, so that the residue of the sulfuryl fluoride gas is avoided, and the quality of grains is ensured.

The utility model discloses a pest control device and system for a production workshop line pipe, and belongs to the technical field of pest control. The nitrogen filling device comprises a plugging assembly and a nitrogen filling assembly, the plugging assembly comprises an expandable expansion and contraction piece, and the expansion and contraction piece is movably inserted into a connector of a wire pipe; the expansion and contraction piece has a contraction state and an expansion state, in the contraction state, the expansion and contraction piece is in clearance fit connection with the inner wall of the connector, and in the expansion state, the expansion and contraction piece is in interference fit connection with the inner wall of the connector; the nitrogen charging assembly comprises a nitrogen charging piece capable of being connected and disconnected, the nitrogen charging piece is arranged in the expansion and contraction piece in a penetrating mode and connected with the expansion and contraction piece in a sealed mode, and the nitrogen charging piece can supplement nitrogen into the line pipe so as to repel and kill pests. According to the utility model, the aim of killing insects in the pipeline can be fulfilled without transforming the existing line pipe.

The utility model relates to the technical field of mosquito-repellent incense, in particular to a mosquito-repellent incense packaging barrel. The mosquito-repellent incense packaging barrel specifically comprises a barrel body and a barrel bottom, the barrel body is fixedly connected around the barrel bottom, and a hemming structure is arranged at an opening of the barrel body; the cylinder body has taper; the cylinder body is made of a paper-plastic material. The paper-plastic material is used for manufacturing the cylinder body with the curled edge structure and the taper, so that the stability of the cylinder body structure is enhanced. The cylinder body is provided with a certain taper, and a hemming structure is arranged at the opening of the cylinder body, so that the supporting performance of the cylinder body is enhanced; the cylinder body is made of paper-plastic materials, so that the cost of the cylinder body is reduced while the cylinder body is waterproof and moistureproof. The utility model has the advantages of stable cylinder body structure, good protection performance and low cost.

The utility model provides a grain storage pipeline system of a grain blocking door of a squat silo. The grain storage pipeline system comprises a gas main pipeline, a circulation fan, a circulation pipeline and a nitrogen pipeline, and a PLC (Programmable Logic Controller) control unit is electrically connected with a temperature sensor, a humidity sensor, a nitrogen concentration sensor, a phosphine gas detector, the circulation fan, a first electric valve and a second electric valve respectively. When the temperature sensor and the humidity sensor detect that the temperature and the humidity of the grain blocking door are too high, high-temperature and high-humidity gas is exhausted out of the squat silo through the circulating fan; when the nitrogen concentration sensor detects that the nitrogen concentration of the grain blocking door is too low, the nitrogen concentration in the squat silo is discharged out of the squat silo through the gas main pipeline, and then the nitrogen is supplemented into the squat silo again through the nitrogen pipeline; in the fumigation period of the warehouse, when the phosphine gas detector detects that the concentration of the phosphine gas at the grain blocking door is too low, the low-concentration phosphine gas is pumped out through the circulation fan and led to the grain pile through the circulation pipeline, and the high-concentration phosphine gas in the grain pile flows back to the grain blocking door.

The invention relates to the technical field of archive repository air conditioning, in particular to a ventilation system for an archive storage room, the archive storage room comprises an archive room, a control room, a reading room and a ventilation room, the archive room is internally provided with a plurality of archive cabinets for storing paper archive files; the ventilation system comprises an indoor ventilation structure for circulating ventilation of the interior of the archive room. According to the file cabinet, through circulating ventilation, air filtration and sterilization treatment of the indoor ventilation structure and effective removal of moisture through the condensation dehumidification box, the risk that files are damaged due to moisture, mildew, insect pests and the like is remarkably reduced. Especially for paper archives, air circulation and dehumidification treatment effectively prevent moisture from eroding the archives, and the archives are kept dry and intact. Through multiple filter screen filtration and ultraviolet sterilization, air in the file room becomes fresher and cleaner, and dust, peculiar smell and bacteria in the air are reduced.

The utility model discloses a portable mosquito prevention and control volatilization device which comprises a box body with an opening; the adsorption structure is arranged in the box body and is used for adsorbing a repellent agent; and the protective cover structure is detachably assembled at the opening so as to shield the adsorption structure and leak or shield volatile gas generated by the repellent agent. After the box body contains the adsorption structure adsorbing the repellent agent, volatilization of the repellent agent can be achieved, meanwhile, the adsorption structure can be shielded through the protection cover structure and is prevented from being separated from the box body, the repellent agent does not need to be smeared on the skin, and therefore the effect of preventing the repellent agent from being smeared on the skin is achieved. The contact between the repellent agent and the skin of the user is effectively avoided, so that the problems of sticky discomfort, potential safety hazards and waste caused by high volatilization speed due to direct contact between the repellent agent and the skin are avoided.

The utility model relates to the technical field of fruit fumigation treatment, and discloses a fruit pest quarantine treatment fumigation device, which comprises a box body of a fumigation box and a sealing box door, the front side of the box body is provided with the sealing box door, the fruit pest quarantine treatment fumigation device further comprises a placing frame, the placing frame comprises a plurality of trays which are sequentially stacked from top to bottom, each tray is of a square groove body structure, and the bottom wall of each tray is a grid plate; the placing frame is detachably mounted on the inner side of the box body; a water tank and an electric heating tube; a water tank fixedly installed at the bottom in the box body is arranged below the placing frame, and an electric heating pipe is installed in the water tank. Compared with the prior art, the placing rack has the advantages that the placing rack comprises the trays which are stacked up and down, a certain number of fruits can be placed in each tray, more fruits can be placed in the placing rack at a time, more fruits can be fumigated in the fumigating box at a time, and the fumigating efficiency of the fruits is greatly improved; according to the fruit fumigating box, fruits can be more conveniently put into the fumigating box or taken out of the fumigating box.

The utility model discloses a mosquito-repelling electric fan which comprises a supporting seat, a fan device and a mosquito-repellent incense liquid heating device. The supporting seat is provided with an electric control device; the fan device comprises fan blades and a motor, the motor is arranged on the supporting base and connected with the electric control device, and the fan blades are installed on a rotating shaft of the motor. The mosquito-repellent incense liquid heating device comprises a shell and a heating piece, the shell is installed on the supporting base, a heating position is arranged in the shell, the shell is provided with a vent hole communicated with the heating position, the heating piece is arranged at the heating position and is in electric control connection with the electric control device, an installation position is arranged below the shell, the installation position is provided with a receding hole, and the receding hole extends to the heating position. The mounting position is used for mounting bottled electric mosquito-repellent incense liquid, and the avoiding hole is used for avoiding a liquid guide core of the electric mosquito-repellent incense liquid. According to the technical scheme, the mosquito-repelling electric fan can improve the mosquito-repelling effect.

A phosphine distribution system (1) comprises a phosphine gas supply sub-system (10) comprising a phosphine source (12) and a phosphine supply line (16); an air supply sub-system (20) comprising an air intake (22), a blower (24) for drawing air into the system (1) through the air intake (22) and an air supply line (26); and a mixer (30) connected to each of the phosphine supply line (16) and air supply line (26). The mixer (30) is operable to form a phosphine / air mixture having a selected phosphine concentration; a distribution line (40) extending from the mixer (30) for delivering the phosphine / air mixture for fumigation dosing when a selectively openable valve (25) is open; a diluent gas supply sub-system (50); and a control system (100) for controlling fumigation dosing including controlling dosing of phosphine into the phosphine supply line (16) to the mixer (30). The control system (100) demands supply of diluent gas from the diluent gas supply sub-system (50) to a selected portion of the phosphine distribution system (1) when a predetermined event occurs.

A sublimation device for protecting honey bees against arthropod pests is described. The device includes a pot with a heated inside space a lid at least one heating means and with a vapor outlet tube. The pot has a thickened bottom. Two intersecting blind holes are formed in the thickened bottom such that the axes thereof lie at an angle with respect to each other, where one of the holes opens either directly from the bottom of the pot or through the side wall of the pot to the heated inside space, and the other of the holes opens to the space outside the pot. A bottom outlet tube is disposed in the blind hole opening to the space outside the pot, with a vapor release tube being disposed in the blind hole opening directly from the bottom of the pot to the heated inside space.

The utility model provides plasma insecticidal sterilization disinfection air purification equipment in space, which belongs to the technical field of air purification equipment, and comprises a purification box body, and a purification cylinder is fixedly connected to the inside of the purification box body through a fixing support; and the rapid purification assembly comprises a plurality of air inlet pipes fixedly connected to the axial side wall of the purification barrel, the interiors of the multiple air inlet pipes are rotationally connected with rotating rods through rotating supports, air inlet fan blades are arranged on the rotating rods, and an acceleration linkage part is arranged in the purification barrel. According to the utility model, a plurality of groups of air inlet pipes can be utilized to quickly absorb a large amount of air, so that the air absorption rate of the air purification equipment can be accelerated, the air purification efficiency can be improved, plasma ozone can be utilized to fully kill pests in the air, the pest killing and sterilizing effects of the air purification equipment can be effectively improved, and the service life of the air purification equipment is prolonged. Meanwhile, the plasma ozone can be reduced to release oxygen during insect killing, and crop growth is promoted.

The invention relates to the field of agricultural biotechnology and plant protection, and particularly provides application of 2-heptanone to preparation of a preparation for preventing and treating plant diseases. The bactericidal composition has a strong bacteriostatic effect on litchi colletotrichum gloeosporioides, strawberry colletotrichum gloeosporioides, mango leaf blight, pawpaw colletotrichum gloeosporioides, wheat gibberellic disease, mango colletotrichum gloeosporioides, tomato fusarium wilt, banana fusarium wilt, banana colletotrichum gloeosporioides and corn root rot. The fumigant developed on the basis of 2-heptanone and used for preventing and treating phytopathogen is expected to be used for preventing and treating compound diseases caused by various pathogenic bacteria, or comprehensively preventing and controlling different crop diseases in a crop rotation system, and has important development value.