JP2009118792A - Method for controlling insect pests, and ultrasound-type insect pest-control device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To effectively diffuse a chemical liquid, containing an insecticide, into a treating space by using a comparatively safe method. <P>SOLUTION: The method for controlling insect pest includes a step of initially continuously spraying the chemical liquid containing the insecticide, and a step of intermittently spraying the chemical liquid, after the former step. The insecticide is, for example, metofluthrin. By means of such a method, the chemical liquid can be diffused efficiently into the treating space so as to become comparatively safe with respect to human beings or animals, other than insect pests. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a method for controlling a pest by spraying a chemical solution containing an insecticide and a pest control apparatus used therefor. More specifically, the present invention relates to a method for controlling pests by continuously spraying a chemical solution containing an insecticide at an initial stage and then intermittently spraying, and an ultrasonic pest control apparatus used therefor.

  As a method of controlling pests that can harm the human body and animals such as mosquitoes, flies, fleas, lice, ticks, etc., conventionally, chemical spray, mosquito coils, mat type insecticide devices, liquid heat transpiration devices, ultrasonic oscillation devices, etc. Nebulizers and the like are known.

  Among them, in a mat type insecticidal device, a liquid heating transpiration device, a chemical spraying device using ultrasonic oscillation, etc., a chemical solution containing an insecticide is usually continuously supplied to the processing space. However, there are problems such as waste of medicinal components, waste of power consumption, and effects on animals and humans other than pests.

On the other hand, methods for supplying an insecticide-containing chemical solution intermittently have been proposed mainly for the purpose of saving power consumption (Patent Documents 1 and 2).
JP-A-11-56195 JP2006-121988

  However, a method to obtain the highest insecticidal effect as much as possible while minimizing the effects on animals and humans other than pests has not been established yet, and a more effective insecticidal effect can be achieved quickly and with minimal drugs. A method that can be achieved with a large amount is strongly desired.

  Accordingly, an object of the present invention is to provide a method and a device used therefor that can achieve a more effective insecticidal effect quickly and with a minimum amount of medicine.

  As a result of intensive studies, the present inventors have found that the above object can be achieved by providing the following pest control method, and have completed the present invention.

That is, the pest control method of the present invention includes the step of intermittently spraying step, and the subsequent chemical solution to an initial continuous spraying a chemical solution containing an active ingredient of ^{insecticides,} 10 m 3 ～100M per ^3, from 0.01 mg 10 mg It is the method of making it become the processing space containing the active ingredient of.

  The initial continuous spraying process is performed for a time period of 5 seconds or more and 3 minutes or less, the spraying interval in the intermittent spraying process is 3 seconds or more and 10 seconds or less, and the spraying time for each time can be 20 milliseconds or more and 1 second or less.

  The active ingredient of the insecticide may be one selected from the group consisting of metfurthrin, profluthrin, transfluthrin and pyrethrin.

  The said chemical | medical solution may contain metfurthrin as an active ingredient of an insecticide, and may contain an isoparaffin-type hydrocarbon solvent as a solvent.

The pest control method can be performed by spraying a chemical solution using ultrasonic waves.

The ultrasonic pest control apparatus according to the present invention includes a container for storing a chemical solution containing an active ingredient of an insecticide to be sprayed; a water supply bar at least part of which is immersed in the chemical solution; Spraying means for spraying; and a control unit for controlling driving of the spraying means, wherein the control unit has a function of switching the driving state of the spraying means from continuous spraying to intermittent spraying.

In one embodiment, the ultrasonic type insect pest control apparatus, the drug solution initially continuous spray, by then intermittently spraying the drug ^solution, 10 m 3 ～100M per ^3, the active ingredient of 10mg is contained from 0.01mg Processing space can be created.

  The initial continuous spraying step is performed for 5 seconds or more and 3 minutes or less, the spray interval in the intermittent spraying step is 3 seconds or more and 10 seconds or less, and the spraying time of each time may be 20 milliseconds or more and 1 second or less.

  By applying the pest control method of the present invention, a chemical solution containing an active ingredient of an insecticide can be effectively diffused. Furthermore, the ultrasonic pest control apparatus of the present invention makes it possible to more effectively release a small amount of an insecticide active ingredient into the treatment space, and effective pest control can be performed automatically.

  Embodiments of the present invention will be described below.

  Terms used in this specification will be explained. As used herein, the term “pest” refers to an insect that causes harmful effects on humans, livestock, pets, agricultural products, and the like, specifically, small animals that are mainly invertebrates, particularly insects. Specifically, it refers to insects such as, but not limited to, mosquitoes, flies, fleas, lice and ticks.

  In the present specification, the “active ingredient of an insecticide” refers to an active ingredient of a drug that can cause the above insects to die. Specifically, allethrin, tetramethrin, praretrin, phenothrin, resmethrin, ciphenothrin, permethrin, cypermethrin, deltamethrin, tralomethrin, cyfluthrin, flamethrin, imiprotolin, etofenprox, fenvalerate, fenpropathrin, silaflurin, terarethrin, biteretrin Pyrethroid compounds such as empentrin, pyrethrin, 2-methyl-4-oxo-3- (2-propynyl) -cyclopent-2-enyl 3- (2,2-dichlorovinyl) -2,2-dimethylcyclopropanecarboxylate, Organophosphorus compounds such as dichlorvos, fenitrothion, tetrachlorobinphos, fenthion, chlorpyrifos, diazinon, propoxer, carbaryl, methoxadia Carbamate compounds such as zon and phenolcarb, lufenuron, chlorfluazuron, hexaflumuurone, diflubenzuron, cyromazine, 1- (2,6-difluorobenzoyl) -3- [2-fluoro-4- (1,2,3,3) Chitin formation inhibitors such as 3,3-hexafluoropropoxy) phenyl] urea, juvenile hormone-like substances such as pyriproxyfen, metoprene, hydroprene, phenoxycarb, neonicotinoid compounds, and N-phenylpyrazole compounds , Natural products such as Jochugi extract are included.

  Organophosphates and carbamates bind to acetylcholinesterase (AChE), a degrading enzyme of the neurotransmitter acetylcholine, and irreversibly or reversibly inhibit its action. For this reason, acetylcholine remains abnormally accumulated and information transmission is inhibited. These drugs have a high residual effect. Pyrethroids act on Nax channels of nerve axons and inhibit information transmission in the nervous system, but have low residual effects. Chloronicotinyl agents bind to receptors for the acetylcholine neurotransmitter acetylcholine instead of acetylcholine. This inhibits information transmission by acetylcholine. Among these drugs, although not limited in the present invention, metfurthrin, which is a pyrethroid drug, can be preferably used.

Solvents for insecticides used for preparing chemicals include, for example, aliphatic hydrocarbon compounds, alicyclic hydrocarbon compounds, aromatic hydrocarbon compounds, halogenated hydrocarbon compounds, alcohols, esters, ethers, ketones, etc. Is mentioned. The solvent evaporates at room temperature. For example, a compound having a vapor pressure at 30 ° C. of 4.0 × 10 ⁻³ MPa or more is preferable. Under such conditions, the chemical solution particles are suitable for micronization and are excellent in extending the floating time of the chemical solution particles or promoting diffusion. Particularly preferred is an isoparaffinic hydrocarbon solvent. Examples of the isoparaffinic hydrocarbon solvent include, but are not limited to, IP solvent 1016, IP solvent 1620, IP solvent 2028, and IP solvent 2835 (all manufactured by Idemitsu Kosan Co., Ltd.).

  The mixing ratio of the active ingredient of the insecticide to the solvent is not particularly limited as long as an effective amount of the insecticide ingredient can be sprayed into the treatment space, but a chemical solution containing the active ingredient of the insecticide and the solvent. It is 0.02% to 5% by weight, more preferably 0.1% to 3% by weight, and most preferably 0.1% to 1% by weight, based on the total amount.

  In the present invention, not only a mixture of a solvent and an active ingredient of an insecticide, but also a composition obtained by mixing a solvent in water with an insecticide and a composition obtained by emulsifying or suspending an active ingredient in water together with a surfactant It can also be used as As an active ingredient, for example, an antioxidant, an ultraviolet ray inhibitor, a fragrance, a pigment, and the like can be appropriately blended in the chemical solution.

When spraying a chemical solution with a low active ingredient concentration, the amount of the chemical solution to be sprayed increases.On the other hand, when spraying a chemical solution with a high active ingredient concentration, the viscosity of the chemical solution increases. It is desirable to decide in consideration of these.

In the present ^invention, 10 m 3 ～100M per ^3, throughout the whole process, in terms of the active ingredients of insecticides obtain treated space 10mg is contained from 0.01 mg. “Initial continuous spraying” refers to continuous spraying of a chemical solution for the first fixed time at the start of diffusion when the chemical solution containing an insecticide is diffused into the treatment space. The initial continuous spraying time is not particularly limited, but it means that the chemical liquid is continuously sprayed preferably within 5 seconds to 3 minutes under the condition of the rate of 1 mg to 10 mg of chemical liquid spray per second. The initial continuous spraying time is not limited as long as it is in this range, but is preferably in the range of 10 seconds to 30 seconds, and particularly preferably 10 seconds.

In this specification, an intermittent spraying process means the method of providing the time which does not spray a chemical | medical solution between spraying of a chemical | medical solution. In the present invention, when diffuse the chemical containing insecticide to the processing space per ^{10m 3 ~100m} 3, each round of spraying time is not particularly limited, the proportion of each second 1mg of drug solution spray 10 mg, 20 It is preferably from milliseconds to 1 second. Moreover, although each spraying interval is not particularly limited, it is preferably 3 seconds or more and 10 seconds or less, and more preferably, the spraying time is 3.5 seconds or more and 8 seconds or less. The spraying interval and spraying time in the intermittent spraying process are preferably unified and sprayed at equal intervals, respectively, but is not limited to this, and irregular spraying, that is, spraying interval and time each time Can also be changed.

  In the present invention, a method of effectively diffusing a chemical solution containing an insecticide by combining initial continuous spraying and intermittent spraying can be combined a plurality of times.

  The present invention can be applied not only from the principle of liquid heating transpiration, the principle of spraying a drug by ultrasonic oscillation, etc., but also from any principle capable of spraying a drug, and in particular, the principle of spraying a drug by ultrasonic oscillation Can be used advantageously.

  The method of atomizing and spraying the chemical solution using ultrasonic waves in the present invention includes, but is not limited to, a piezo device using a piezo oscillator, an ultrasonic pump device, and the like.

  When a part of the chemical liquid particles falls around the device, the pesticide component is wasted, resulting in a decrease in efficacy, and in order to prevent contamination of the floor surface, an air blowing means can optionally be provided. .

  Although not limited, the following method and apparatus using an ultrasonic spray mechanism are illustrated as a method and apparatus for combining the initial continuous spray and the intermittent spray of the present invention.

  An example of an ultrasonic spraying apparatus for carrying out the pest control method of the present invention will be described. An apparatus shown in FIG. 1 is exemplified as an apparatus for carrying out the pest control method. This apparatus is an ultrasonic spray apparatus 1, and this ultrasonic spray apparatus 1 includes a chemical liquid container 2 that stores a chemical liquid 21, an ultrasonic spray mechanism 3 that sprays the chemical liquid 21, and an ultrasonic spray mechanism 3. An oscillation circuit 4 that applies a high-frequency voltage to the piezoelectric vibrator 31 that is configured, a control unit 5 that controls energization of the oscillation circuit 4, and a battery 6 as a power source for driving the ultrasonic spray mechanism 3 are provided.

  The ultrasonic spray device 1 includes a setting unit 7 that sets a continuous drive time, a drive time (ON time), a stop time (OFF time, spray interval), and the like of the ultrasonic spray mechanism 3. Timer means 8 for measuring the time set by the means 7 is provided.

  A central portion of the chemical liquid container 2 is made of, for example, a sponge, a fiber bundle or other hydrophilic material, and a water supply rod 22 for supplying the chemical liquid 21 to the vibration plate 32 is provided. The lower end side is immersed in the chemical solution 21, and the end surface on the upper end side of the water supply rod 22 is in contact with the lower surface of the vibration plate 32. In addition, it is preferable that the chemical | medical solution container 2 consists of a transparent container, and can visually confirm the residual amount of the chemical | medical solution 21 inside.

  The ultrasonic spray mechanism 3 is made of ceramics or the like, and is fixed to a lower surface of the piezoelectric vibrator 31 so as to close the ring-shaped piezoelectric vibrator 31 having a through hole in the center and the through hole of the piezoelectric vibrator 31. The vibration plate 32 is provided.

  A large number of through holes (not shown) are formed in the vibration plate 32 in the thickness direction, and the diameter of the upper surface side of the vibration plate 32 is continuously smaller than the diameter of the lower surface side. It is preferable from the point of spraying efficiency to become a sectional view taper shape.

  In addition, one end face (upper end face) and the other end face (lower end face) of the piezoelectric vibrator 31 are electrically connected to the oscillation circuit 4 and have a ring shape for applying a high frequency voltage to the piezoelectric vibrator 31. The electrode (not shown) is fixed.

  The piezoelectric vibrator 31 spreads in the radial direction and vibrates due to the high-frequency voltage applied from the oscillation circuit 4. Based on this vibration, the vibration plate 32 vibrates and is supplied to the vibration plate 32 from the upper end surface of the water supply rod 22. The chemical liquid 21 is sprayed from a large number of through holes formed in the vibration plate 32.

  The control unit 5 turns on the switch circuit 51 to continuously and intermittently drive the ultrasonic spray mechanism 3 based on a switch circuit 51 for turning on / off the energization of the oscillation circuit 4 and a signal from the timer means 8. A signal output circuit 52 that outputs an OFF command signal is provided.

  The setting unit 7 includes a first setting unit 71 that sets a continuous driving time of the ultrasonic atomizing mechanism 3, a second setting unit 72 that sets a driving time (ON time) during intermittent driving, and a stop during intermittent driving. Third setting means 73 is provided for setting time (OFF time, spray interval).

  The timer means 8 counts the continuous drive time set by the first setting means 71 and outputs a signal to the signal output circuit 52 of the control unit 5. The timer means 8 is set by the second setting means 72. Stop time (OFF) during intermittent driving set by the second timer means 82 and the third setting means 83 for measuring the driving time (ON time) during intermittent driving and outputting a signal to the signal output circuit 52 And a third timer means 83 for measuring the time and spray interval and outputting a signal to the signal output circuit 52.

  Note that a memory that stores a plurality of drive patterns configured by the continuous drive time set by the setting means 71, 72, and 73 and the drive time (ON time) and stop time (OFF time) at the time of intermittent drive is provided as a control unit. 5, the selection means for selecting the optimum drive pattern at the time of use from the plurality of drive patterns may be provided in the setting means 7 separately.

  Further, without providing each setting means 71, 72, 73 in particular, a memory for storing a plurality of preset drive patterns is provided in the control unit 5, and an optimum drive pattern at the time of use is selected from the plurality of drive patterns. Only the selection means to select may be provided in the setting means 7, and these configurations are arbitrary.

  In these configurations, when the battery 6 is used as a driving power source and the switch circuit 51 is turned on based on the ON command signal from the signal output circuit 52, a high frequency voltage is applied from the oscillation circuit 4 to the piezoelectric vibrator 31, and the piezoelectric vibration is generated. The child 31 vibrates, and the vibration plate 32 vibrates due to this vibration. On the other hand, the chemical solution 21 stored in the chemical solution container 2 is supplied to the lower surface side of the vibration plate 32 via the water supply rod 22.

  Then, the chemical solution 21 supplied to the lower surface side of the vibration plate 32 is sprayed upward from a large number of through holes formed in the vibration plate 32 due to the vibration of the vibration plate 32.

  When the switch circuit 51 is turned off based on the OFF command signal from the signal output circuit 52, the application of the high frequency voltage from the oscillation circuit 4 is stopped, the vibration of the piezoelectric vibrator 31 is stopped, and the spraying of the chemical liquid 21 is performed. Stops.

  Examples of the battery 6 used in the present invention include primary batteries such as alkaline batteries, manganese batteries, button batteries, and air batteries, and secondary batteries such as nickel-cadmium batteries and lithium ion batteries.

  In the above embodiment, the piezoelectric vibrator 31 is exemplified as a ring shape. However, the piezoelectric vibrator is not limited to the ring shape, and may be a rectangular shape in plan view, for example. The shape is arbitrary. In the above-described embodiment, the vibration plate 32 is exemplified as one that closes the through hole of the piezoelectric vibrator 31. However, for example, the above-described rectangular vibrator is used as the piezoelectric vibrator. The vibration plate may be a cantilever support type in which one end portion is fixed to the rectangular piezoelectric vibrator, and the shape and the attachment form to the piezoelectric vibrator are arbitrary.

  The present invention has been described with reference to the preferred embodiments for easy understanding. In the following, the present invention will be described based on examples, but the above description and the following examples are provided for illustrative purposes only, and the scope of the present invention is limited to the implementations specifically described herein. It is not limited to the form or the example.

(Example 1)
In order to examine the efficacy of the chemical sprayed in the treatment space, 0.35% by weight of metfurthrin and 99.65% by weight of IP solvent 2028 were mixed to prepare a chemical. The effect of the combination of initial continuous spraying and intermittent spraying on this chemical solution was examined using the ultrasonic spray device shown in FIG.

  As the power source (battery 6), DC 3V was used. In the oscillation circuit 4, the voltage was increased to 43V, and the frequency was controlled to 113 KHz to vibrate the piezoelectric vibrator 3 1.

(Test method)
The temperature in the test chamber (about 18 m ³ ) was set between 24 ° C. and 27 ° C., and the humidity was adjusted from 32 to 43%. After releasing about 100 adult stingrays in this chamber, a chemical solution was sprayed, and the number of knocked-down insects over time was investigated at regular intervals from the start of spraying. The time and amount until the animals were 100% knocked down were also compared.

表１に示す結果によると、このような条件において、初期連続噴霧を行わない場合では、ノックダウンまでに３５分かかり、初期連続噴霧が１秒の場合では、ノックダウンまでに３０分と短時間でありながら、全体の噴霧量も初期連続噴霧を行わない場合に比べて良好であった。さらに、５秒、１０秒の初期連続噴霧を施した場合においては、それぞれ、５９．３ｍｇおよび６０．１ｍｇの量に達した２５分の時点で１００％のノックダウンが観察され、より短時間で、かつ少ない噴霧量で高い効果が得られることがわかった。また、初期連続噴霧時間が３分間になると、全噴霧量が３５９．９ｍｇという高い値となり、効力の面では１分間の連続噴霧と変わりはなかった。 The initial continuous spraying time is set to zero, 1 second, 5 seconds, 10 seconds, 30 seconds, 1 minute, and 3 minutes, respectively. The spraying time for intermittent spraying is 44 milliseconds, and the spraying interval is 3.75 seconds, 1 The results when the spray amount per round was about 0.1 mg were as shown in Table 1 below.

According to the results shown in Table 1, under such conditions, when initial continuous spray is not performed, it takes 35 minutes to knock down, and when initial continuous spray is 1 second, it takes 30 minutes to knock down. However, the total spray amount was also better than when the initial continuous spray was not performed. In addition, when the initial continuous spray of 5 seconds and 10 seconds was applied, 100% knockdown was observed at the time of 25 minutes when the amounts of 59.3 mg and 60.1 mg were reached, respectively. It was also found that a high effect can be obtained with a small spray amount. In addition, when the initial continuous spraying time was 3 minutes, the total spray amount was as high as 359.9 mg, which was not different from the continuous spraying for 1 minute in terms of efficacy.

  Next, continuous spraying was performed in the same test manner using the same apparatus until the total amount was 60.1 mg. As a result, it reached 60.1 mg in 1 minute, but the knockdown rate was 0% and far from 100%.

その結果、噴霧間隔の時間が３秒以上１０秒以内であれば１００％ノックダウンまでの時間が、６０分間以内と良好であるが、それ以外の範囲では、時間がかかりすぎるか、噴霧量が多くなりすぎるかのどちらかであった。これらのことから、噴霧間隔の時間は３秒以上１０秒以内とすることが最も好ましいと判明した。 (Example 2)
Next, the same initial continuous spraying time was provided, and the relationship between the spraying interval time and efficacy in the case of different intermittent conditions was evaluated. Using the same chemical solution using the ultrasonic spray device described above and using metfurthrin, spraying the treatment space intermittently at different spray intervals under the conditions shown in Table 2 below, pests in the treatment space The control effect was evaluated.

As a result, if the spray interval time is 3 seconds or more and within 10 seconds, the time to 100% knockdown is good within 60 minutes, but in other ranges it takes too much time or the spray amount is Either it was too much. From these facts, it was found that the spraying interval time is most preferably 3 seconds or more and 10 seconds or less.

  When spraying metofluthrin using the ultrasonic spray device shown in FIG. 1, it is considered that chemical liquid particles falling in the closest range of the device are also volatilized, the active ingredient is not wasted, Contamination from falling particles is also reduced. In the apparatus shown in FIG. 1, the initial continuous spray time, the spray time during intermittent spraying, and the spray interval can be adjusted within a range in which the necessary spray amount can be secured, so that the power consumption can be further reduced. Is possible.

It is a schematic diagram which shows embodiment of the ultrasonic spray apparatus used for this invention.

Explanation of symbols

1: Device main body 2: Chemical liquid container 3: Ultrasonic oscillation mechanism 4: Oscillation circuit 5: Control unit 6: Battery 7: Setting means 8: Timer means 21: Chemical liquid 22: Water supply rod 31: Piezoelectric vibrator 32: Vibrated plate

Claims (8)

Includes the step of intermittently spraying step, and the subsequent chemical solution to an initial continuous spraying a chemical solution containing an active ingredient of ^{insecticides,} and the processing space 10 m 3 ～100M per ^3, the active ingredient of 10mg from 0.01mg contained Pest control method to do.   The initial continuous spraying process is performed for a time period of 5 seconds or more and 3 minutes or less, a spray interval in the intermittent spraying process is 3 seconds or more and 10 seconds or less, and each spraying time is 20 milliseconds or more and 1 second or less. Item 1. A method for controlling pests according to Item 1.   The pest control method according to claim 1 or 2, wherein the active ingredient of the insecticide is one selected from the group consisting of metfurthrin, profluthrin, transfluthrin, and pyrethrin.   The pest control method according to any one of claims 1 to 3, wherein the chemical solution contains metfurthrin as an active ingredient of an insecticide and an isoparaffin hydrocarbon solvent as a solvent.   The method for controlling pests according to any one of claims 1 to 4, which is performed by spraying the chemical solution using ultrasonic waves.   A container for storing a chemical solution containing an active ingredient of an insecticide to be sprayed; a water supply bar at least partially immersed in the chemical solution; a spraying means for spraying the chemical solution using ultrasonic waves; and driving of the spraying means An ultrasonic pest control apparatus having a function of switching the driving state of the spraying means from continuous spraying to intermittent spraying. The chemical initially continuous spray, followed by intermittently spraying the drug ^solution, it is possible to create a processing space of 10 m 3 ～100M per ^3, the effective ingredient 10mg from 0.01mg contained, according to claim 6 Ultrasonic pest control device.   The initial continuous spraying process is performed for a time period of 5 seconds or more and 3 minutes or less, a spray interval in the intermittent spraying process is 3 seconds or more and 10 seconds or less, and each spraying time is 20 milliseconds or more and 1 second or less. Item 7. The ultrasonic pest control apparatus according to Item 7.

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