JPS5843732A - Apparatus for accomodating and evaporating volatile drug - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for storing a volatile drug and uniformly volatilizing the drug components to stably maintain the drug's effect over a long period of time.

More specifically, the present invention relates to an attractant storage and volatilization device that is particularly suitable for volatilizing the attractant of pine and longhorn beetles and stably sustaining its attractant effect.

In recent years, severe damage to pine trees has been rampant in most areas of Japan except Hokkaido and Tohoku (excluding some prefectures). It is well known that the cause of such pine blight is the correlation between the pine nematode and the pine beetle. (abbreviation)) can be considered.

Various methods have been proposed to control this longhorn beetle, and some have been implemented, but one method that is particularly effective in terms of practicality is the combination of an insecticide and an attractant. .

This method involves treating pines or shrubs within a certain area around a longhorn beetle attractant installed in a forest area with insecticide, and then treating the area where the attractant and insecticide are combined to treat the area where the attractant is applied. They are scattered throughout the forest according to their attracting ability and attracting range in an attempt to wipe out all the longhorn beetles that are attracted to them. According to this method, all the longhorn beetles concentrated in the attractable range of the attractant can be brought into contact with the insecticide and killed, and furthermore, the insecticide can be sprayed over a small area, which is very economical and reduces environmental pollution. It can be said to be an ideal means of protecting pine trees, as there is no problem of chemical damage to humans or livestock.

However, this method has the disadvantage that there is a difference between the residual effectiveness of the insecticide and the persistence of the attractant, and the attracting ability of the attractant disappears in a relatively short period of time. In other words, due to the nature of the attractant, the attracting ability at the time of installation decreases significantly over time, and the attractant must be frequently replaced with a new one during the remaining effectiveness of the insecticide (this is a hassle). .

Therefore, if the attractive force of the attractant is sustained over a long period of time to match the residual effectiveness period of the insecticide, there will be no need to replace the attractant frequently.

Furthermore, the fact that the components of the attractant are uniformly stable and difficult to volatilize seems to be related to the lack of sustainability of the attractant effect. That is, commercially available attractants for longhorn beetles are prepared by dissolving a mixture of benzoic acid, eugenol, pine oil, α-pinene, pine resin extract, etc. in a volatile solvent such as an alcohol-based solvent, and then It is packed together with absorbent cotton in a small can, and when used, the can is opened to expose about 1 cIn of absorbent cotton and the drug ingredients are volatilized. However, due to the physicochemical properties of drug components, components with high vapor pressure or low boiling point evaporate from the absorbent cotton surface in order, so there is a tendency for drug components to not evaporate uniformly and stably, especially benzoic acid. may crystallize on the absorbent cotton surface, making it impossible to achieve uniform transpiration.

1: Therefore, the present invention aims at 11: When carrying out the method for attracting and killing longhorn beetles by using the above-mentioned insecticide and attractant in combination, the attractant is stored, the drug component is uniformly volatilized, and the attracting effect is stabilized. The purpose is to provide a device that can last for a long period of time.

That is, the attractant storage and volatilization device according to the present invention,
It consists of a drug storage container having an opening in a part of the top surface and an evaporation tube inserted into the opening, the lower end of the evaporation tube is located near the bottom surface of the drug storage container, and the upper end is located at the top of the drug storage container. The device is characterized in that a drug absorbing material is filled so as to protrude above the surface and leave an upper space within the evaporation column.

The invention will be explained in more detail below with reference to preferred embodiments shown in the drawings.

FIG. 1 is an exploded view of the parts of the device of the present invention, and 1 indicates a drug storage container, which is a cylindrical container with a diameter of 1501 nm and a height of 75 mm, with an opening 2 having a diameter of 50 mm approximately in the center of the top surface. Conditions apply. 3 indicates the evaporation cylinder, which is a cylinder with a diameter of 50cm and a length of 125cm with both ends open.The inside of the cylinder is filled with absorbent cotton 4 as a drug absorbing material up to a height of 75cm from the bottom end of the cylinder. A space 6 is left at the top. Several semicircular notches 6 with a diameter of about 10111111 are provided at the lower end periphery of the evaporator cylinder 3.

When assembling the device of the present invention, first, the drug storage container 1
After putting a predetermined amount of attractant into the container through the opening 2 of the container, the evaporation tube 3 is inserted into the container through the opening 2 and pushed until the lower end of the evaporation tube reaches near the bottom of the container. As in the illustrated embodiment,
If the notch 6 is provided at the lower end of the evaporator 3, the lower end of the evaporator 3 may be in contact with the bottom of the container 1, but if the notch 6 is not provided, the lower end of the evaporator 3 may be in contact with the bottom surface of the container 1. container 1
If a slight gap is not left between the cotton and the bottom, there is a risk that the drug will not be absorbed effectively into the absorbent cotton.

Note that since the device of the present invention is normally installed and used outdoors, it is desirable to attach a rain shield to the top of the evaporation tube.

In the illustrated embodiment, a rain umbrella 7 is placed on top of the evaporator tube 3. In the figure, the 68 provided near the upper end of the evaporator tube 3 is for attaching and fixing the legs 9 of the rain umbrella 7 to the evaporator tube by means such as screws.

The apparatus of the present invention thus assembled has an appearance as shown in FIG.
The lower end of the evaporator tube is located near the bottom of the drug container, the upper end of the evaporator tube projects above the top surface of the container, and absorbent cotton 4 is filled in the evaporator tube so as to leave an upper space 5.

As a result, the attractant in the container 1 is transferred to the absorbent cotton 4 due to capillary action.
It is sucked upward through the absorbent cotton and vaporized from the surface of the absorbent cotton. The vaporized drug component temporarily accumulates in the upper space 6 within the evaporator cylinder, and then diffuses into the atmosphere from the open upper end of the evaporator cylinder. For this reason, the surface of the cotton pad can always be kept moist.
Uniform and constant evaporation of drug components can be achieved, resulting in a sustained attraction effect.

In addition, the vaporized attracting component temporarily accumulates in the upper space 5 inside the evaporator cylinder, and the attracting substance composed of multiple components becomes a uniform vaporized mixture i here, and then is vaporized from the open upper end of the evaporator cylinder. Since it transpires and is entrained in the atmosphere, the attracting component can be spread over long distances.

As can be seen from the above, in the apparatus of the present invention, the upper space 5 within the evaporator cylinder plays an important role as a part where vaporized components accumulate. The dimensions of this upper space inside the evaporator are not necessarily constant depending on the length and diameter of the evaporator, as well as the type of attractant, and generally speaking, the larger the diameter of the evaporator, the larger the The shallower the space, the greater the amount of vaporized components evaporated.

Diameter 60mm, length 125111 as in the illustrated embodiment
In the case of a No. 111 evaporator cylinder, it is desirable to fill it with absorbent cotton so as to leave an upper space of 60 to 70 fins deep.

In the above embodiment, absorbent cotton was used as the drug absorbing material, but any other material that can absorb and volatilize the drug from the storage container can be used. For example, 1 paper, glass wool, 1 Examples include urethane foam. :: The material of the drug storage container, evaporation tube, rain umbrella, etc. that constitute the device of the present invention can be made of plastic such as hard vinyl chloride or polypropylene, or metal, but acid-resistant materials are preferable. .

The dimensions of the device described above are for the preferred embodiment shown, but are not limited thereto, and appropriate dimensions can be selected depending on the type and capacity of the attractant.

When actually installing the device of the present invention, 1.
Although it is fixed at a height of 6 m or more, it may be suspended by a suitable suspension means such as a string, or it may be placed on a stand at a predetermined height.

The above explanation describes an example in which the device of the present invention is used to store and volatilize an attractant when controlling longhorn beetles using a combination of an attractant and an insecticide. It is also possible to use the device of the present invention in conjunction with an insect trapping device, such as a net with an adhesive substance, and furthermore, it is also possible to use the device of the present invention not only as an attractant but also as a device for storing and volatilizing other volatile chemicals. be.

The present invention will be further explained below with reference to experimental examples and usage examples showing the effects of the apparatus of the present invention.

Experimental example Commercially available longhorn beetle attractant “Hotron” (Pesticide registration number 1)
No. 3261 (manufactured by Hodogaya Chemical Industry Co., Ltd.) over time in the amount of evaporation and the composition of "Photoron" over time were measured.

Test attractant = "Photoron" Specific gravity 0.8975 Composition Benzoic acid 23% Eugenol 9% Organic solvent etc. 68% Storage and volatilization equipment: Commercially available "Photoron" can (attractant 125.
Filled with 7f (0.14t) and absorbent cotton. Height 7Q
llJ x inner diameter 5Q *+ *) present invention device (attractant 718F
(0.8 t) and the illustrated example filled with absorbent cotton) Test conditions: An opened commercially available "Photoron" can and the device of the present invention were placed in a 300 incubator with a wind speed of 0.5 m/sec. Evaporation amount change over time. Measurement: 94% has evaporated, and the contents can be used effectively to kill. There was almost no change in the composition of benzoic acid and eugenol.
It can therefore be seen that a vaporized mixture of constant composition is obtained.

Example of use A longhorn beetle attraction and insecticidal test was conducted using the attractant storage and volatilization device of the present invention using a combination of longhorn beetle, insect attractant, and insecticide.

(1) Test location and test period June 12, 1986 to August 1, 1986 in a flatland forest in Chiba Prefecture.
2nd day (2) Chemicals and equipment used Attractant = "Photoron" Insecticide = "Sumithion" 50% emulsion Attractant Equipment: Commercially available "Photoron" cans and the device of the present invention (both are the same as those used in the experimental examples) ) (3) Test site setting A 16- to 20-year-old pine forest with a mortality rate of 15 to 20 years old in the previous year.
%, area where longhorn beetles appear to be uniformly distributed.

(4) Insecticide spraying and attractant installation In the test site, attractants were scattered in a matrix pattern at 100 m horizontal and 25 m vertical intervals, targeting pine and shrubs within a 5 m radius from each attractant device. ``Sumithion''
A 50% emulsion 100 times diluted solution was sprayed at a rate of 90t/10a using a power sprayer, and A, B, and C were sprayed in the following arrangement.
Each test area was set to three locations.

Ward A Ward 8 Ward 0 Ward 8 Ward 0 Ward A Ward 0 Ward A Ward 8 Ward A: Commercially available "Hotron" can + insecticide spraying Ward B: Spraying of the invention's equipment engineer insecticide Ward 0: Insecticide spraying only, attraction The agent device was fixed to a pole at a height of 1.5 m above the ground, and was maintained in the originally installed state without being replaced during the test period.

(5) Investigation method and test results A receiving cloth (width 1.5
The cloth was stretched using surrounding trees at a height of 50 crn from the ground, and the number of dead longhorn beetles on the cloth was investigated every week after setting up the test area. The results are shown in Table 3.

Table 3 4゜As can be seen from Table 3, the effect of the combination of attractants is recognized in Areas A and B compared to Area 0, but when commercially available "Photoron" cans are used (Area), 3 From the first week onward, the attraction effect decreases dramatically,
After 6 weeks, almost no attraction effect is observed. On the other hand, when "photoron" is used with the device of the present invention (B
ward), it can be seen that a stable attraction effect persisted over the test period.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view of a preferred embodiment of the apparatus of the present invention, and FIG. 2 is an assembled view of FIG. 1. DESCRIPTION OF SYMBOLS 1... Drug storage container, 2... Opening, 3... Evaporation tube, 4... Absorbent cotton, 6... Upper space inside the evaporation tube, 6...
・Notch. Patent applicant: Hodogaya Chemical Industry Co., Ltd. Representative: Yuki Omata Masato Mebushi
Shigemi Estimate Agent
Tomonosuke Araki Figure 1 Figure 2

Claims (1)

[Claims] 1. Consisting of a drug storage container having an opening in a part of the top surface and an evaporation tube inserted into the opening, the lower end of the evaporation tube is located near the bottom surface of the drug storage container. A volatile drug storage and volatilization device characterized in that an upper end projects above the top surface of the drug storage container, and a drug absorbing material is filled so as to leave an upper space in the evaporation cylinder. 2. The device according to claim 1, wherein a plurality of notches are provided at the periphery of the lower end of the evaporator cylinder.