JP7228731B1 - Method for exterminating apple snail and container for exterminating apple snail - Google Patents

Abstract

[Problem] To provide a method for exterminating S. apple snail by not only capturing the S. apple snail but also killing and exterminating the S. apple snail, and an extermination container for use in this method. [Solution] In the container for exterminating Squami apple snails of the present invention, the attracting bait 16 contains animal fat and oil, water is stored inside the partition wall surface material 11, and the attracting bait 16 is added to the water inside the partition wall surface material 11. By installing it so that it is immersed in water, the S. apple snail 1 is attracted to the inside of the partition wall surface material 11, and the dissolved oxygen in the water inside the partition wall surface material 11 is reduced by the decomposition of organic matter by microorganisms. The method is characterized by killing the attracted Scyllium apple snail 1 by lowering dissolved oxygen. [Selection diagram] Figure 1

Description

Application of Article 30, Paragraph 2 of the Patent Law 1. Nihon Agricultural Newspaper, dated July 10, 2021, page 13, published by Nihon Agricultural Newspaper Co., Ltd. 2. Chiba Nippo, dated September 25, 2021, page 2, published by Chiba Nippo Co., Ltd. 3. Announced at Chiba Prefectural Agricultural College on November 10, 2021 4. 5. Presented on November 20, 3rd year of Reiwa at the 3rd year of Reiwa at the Togane School of Agriculture, Chiba Prefectural University of Agriculture. 5. National Agricultural Newspaper, dated January 14, 2022, page 1, published by the National Chamber of Agriculture. Announced at Chiba Prefectural Tako High School on May 11, 2020 7. Announced at Chiba Prefectural Tako High School on June 3, 2020 8. Mainichi Shimbun, published by Mainichi Shimbun Co., Ltd., dated May 17, 2020, page 18 9. 10. Nihon Agricultural Newspaper, dated May 18, 2022, page 10, published by Nihon Agricultural Newspaper Co., Ltd. Chiba Nippo, dated May 21, 2022, page 2, published by Chiba Nippo Co., Ltd. 11. 12. Announced on June 29, 2022 at the Giku Plaza of Sanmu City Naruto Cultural Center at the 2022 Agricultural Management Body Development Seminar Specialized Training (Pests). Provided on November 12, 2021 13. Provided on March 21, 2021 14. Provided on April 27, 2020 15. Provided on May 25, 2020 16. On sale May 27, 2020 17. Provided on June 8, 2020 18. Provided on June 11, 2022

TECHNICAL FIELD The present invention relates to a method and a container for exterminating apple snails that inhabit especially paddy fields.

The apple snail Pomacea canaliculata (Lamarck) is commonly called a jumbo snail, and was designated as a harmful animal in 1984 based on the Plant Protection Law (Fig. 11(a)). Although this shellfish is native to South America, it was imported from Taiwan for food, and later, due to inadequate disposal of raw shellfish and egg masses following the closure of the business, it invaded irrigation canals and spread throughout Japan. Wild mussels have become a major problem as they feed on paddy rice, lotus roots, and rushes. In the case of paddy rice, it feeds on young and soft seedlings that are 2 to 3 weeks old immediately after transplantation, causing poor growth and missing plants (FIGS. 11(b) and 11(c)). In addition, it eats up rare aquatic plants that are in danger of extinction, and there is concern about a decline in biodiversity. In addition, it is said that it is better to refrain from touching the apple snail with bare hands as it may have parasites such as Cantonese blood nematode in its body. Since this mussel reproduces vigorously, it requires annual pest control. Eggs are dark pink and conspicuous, and form an egg mass consisting of about 200 to 300 eggs (Fig. 12). The annual total number of eggs laid by one female is said to be more than 3,000.
The main control measures for the apple snail are (a) to prevent the intrusion of shellfish by installing nets, etc. at the water intake and drain. (b) Capturing by setting traps in fields and waterways. (c) Killing egg masses deposited on walls of water channels and the like. (d) Sprinkling lime nitrogen, which has a molluscidal effect, on the field. (e) Applying a chemical that has an effect of preventing feeding damage to the nursery box. (f) Transplanting seedlings at the 4-leaf stage or higher that are less susceptible to feeding damage. (g) Suppression of feeding behavior by setting the water depth to 4 cm or less. (h) Spraying chemically synthesized pesticides in fields for the purpose of killing mollusks. (i) Shellfish killing by rotary tillage before the extreme cold season. (j) Killing clams by digging up mud accumulated in waterways. (k) Cleaning agricultural machinery to prevent shellfish from being brought into the country. (l) Decrease in shell density due to field rotation. (m) Predation by ducks and carp. etc. are practiced (Non-Patent Document 1). In addition, research is being conducted on pest control using electrical methods and ultrasonic waves (Non-Patent Document 2).
The combination of the above control methods has been effective in controlling mussels, but when the water becomes deep due to heavy rain, etc., the apple snail becomes active and may damage the seedlings. Shellfish killing by rotary tillage and field rotation is a countermeasure for subsequent crops, and chemical synthetic pesticides are considered to be effective as an emergency response to changes in water depth. However, in recent years, SDGs and environmental measures have come to be emphasized, and efforts to reduce the amount of agricultural chemicals used at production sites are required. Various traps have been developed as a method of installing traps in fields and waterways, such as trapping with PET bottle traps (Non-Patent Document 3) and vegetable traps (Non-Patent Document 4). It can be considered as an effective means.
Conventional capture traps are disclosed in Patent Documents 1 to 4.

JP-A-2001-157544 JP 2007-97549 A Utility Model Registration No. 3103317 Utility Model Registration No. 3070748

"Manual for pest control measures for apple snails (transplanted rice)", Ministry of Agriculture, Forestry and Fisheries, Food Safety and Consumer Affairs Bureau, Plant Protection Division, March 2022 Yoshihito Yagyu, 2 others, "Trials to control apple snails by electrical methods (special feature: progress in research on apple snails and prospects for control technology)", Plant Protection, Vol. 69, No. 3, Japan Plant Protection Association, 3, 2015 Moon, p169-174 Katsuya Ichise, 2 others, ``Trap of apple snails using PET bottles'', Bulletin of Kyushu Research Society of Diseases and Pests, Vol. 44, Kyushu Research Society of Diseases and Pests, November 1998, p. Yoshinori Kunimoto, 1 person, ``Improvement of capture efficiency of apple snails using vegetable traps'', Nozaku Kenkyu, Vol.

The catching traps disclosed in Patent Documents 1 to 4 are intended to capture apple snails, and after catching the apple snails must be taken out and killed.

SUMMARY OF THE INVENTION An object of the present invention is to provide a method for exterminating apple snails that not only captures the apple snails, but also kills and exterminates them, and an extermination container used in this method.

In the method for exterminating apple snails 1 of the present invention described in claim 1, a partition wall member 11 having an opening at the top is placed in water, and a lure bait 16 is used to lure the apple snail 1 into the partition wall member 11. In the extermination method of 1, the lure bait 16 contains animal oil and fat, water is stored in the interior of the partition wall member 11, and the lure bait 16 is placed in the interior of the partition wall member 11. By installing so as to be immersed in the water, the apple snail 1 is attracted to the inside of the partition wall member 11, and the dissolved oxygen in the water inside the partition wall member 11 is reduced by organic matter decomposition by microorganisms. , the mussels 1 attracted to the inside of the partition wall material 11 are killed by the decrease in the dissolved oxygen.
According to a second aspect of the present invention, in the method for exterminating the apple snail 1 according to the first aspect, the opening formed in the upper portion of the partition wall member 11 is positioned lower than the water surface 2, and the partition wall member 11 is The partition wall member 11 is installed by embedding at least the lower part in the ground 3 of the paddy field.
The present invention according to claim 3 is a container 10 for exterminating apple snail 1 used in the method for exterminating apple snail 1 according to claim 1 or claim 2, wherein the opening formed in the upper part of the partition wall member 11 has a has a lid body 12, in the center of the lid body 12 is formed an attracting opening 13 for attracting the apple snail 1 to the inside of the partition wall member 11, and around the attracting opening 13, the partition wall A return member 14 that hangs down in the interior of the material 11 is provided, and fish such as loaches and crucian carp, tadpoles (frog larvae), etc. that are attracted to the interior of the partition wall member 11 and circulate around the upper outer periphery of the partition wall member 11. amphibians, or insects such as diving beetles and nymphs (dragonfly larvae) are formed in the outer periphery of the lid body 12.
According to the fourth aspect of the present invention, in the container 10 for exterminating apple snails 1 according to the third aspect, the attracting opening 13 is positioned lower than the outer circumference of the lid 12, and from the outer circumference of the lid 12 It is characterized in that the inclined surface leading to the attraction opening is formed of a net material.

According to the present invention, by placing the lure containing animal fats and oils so as to be submerged in the water inside the partition wall material, the water stored inside the partition wall material can be decomposed by aerobic microorganisms. Along with this, a large amount of oxygen is consumed and the concentration of dissolved oxygen decreases, so the apple snail becomes oxygen-deficient and dies.

FIG. 1 shows a container for exterminating apple snails according to one embodiment of the present invention; Graph showing changes in dissolved oxygen concentration in the extermination container A diagram showing the attraction effect when bamboo pellets are used as lure Photograph showing the attracting effect of the attracting bait used in this embodiment Graphs and photographs showing the attracting effect of the attracting bait used in this example and the results of rice damage verification FIG. 3 shows a container for exterminating apple snails according to another embodiment of the present invention; A photograph showing a method of installing a container for exterminating apple snails according to the present embodiment. Graph showing trapping results in a disinfestation container according to the embodiment shown in FIGS. 6 and 7 FIG. 10 is a diagram showing a container for exterminating apple snails according to still another embodiment of the present invention; FIG. 10 is a diagram showing a container for exterminating apple snails according to still another embodiment of the present invention; Photographs of Sukumiringokai and photographs showing the extent of damage photo of eggs

According to the first embodiment of the method for exterminating apple snails according to the present invention, the attracting bait contains animal oil and fat, water is retained inside the partition wall material, and the attracting bait is stored in the water inside the partition wall material. By installing it so that it is submerged, the apple snails are attracted to the inside of the partition wall material, and the dissolved oxygen in the water inside the partition wall material is reduced by the decomposition of organic matter by microorganisms, and the apple snail attracted to the inside of the partition wall material. It kills shellfish by decreasing dissolved oxygen.
According to the present embodiment, by placing the lure containing animal fats and oils so as to be submerged in the water inside the partition wall material, the water retained inside the partition wall material becomes organic matter generated by aerobic microorganisms. A large amount of oxygen is consumed with the decomposition of , and the concentration of dissolved oxygen decreases. Thus, the method for exterminating the apple snail according to the present embodiment can not only capture the apple snail but also exterminate it by slaughtering it.

According to a second embodiment of the present invention, in the method for exterminating apple snails according to the first embodiment, the opening formed in the upper part of the partition wall material is positioned lower than the water surface, and at least the lower part of the partition wall material is placed in a paddy field. The partition wall material is installed by embedding it in the ground.
According to this embodiment, the opening is located below the water surface and at least the lower part of the partition wall member is buried in the ground, thereby easily attracting the apple snail into the partition wall member.

A third embodiment of the present invention is a container for exterminating apple snails used in the method for exterminating apple snails according to the first or second embodiment, and the opening formed in the upper part of the partition wall member has a lid. At the center of the lid, an attraction opening is formed to attract the apple snail to the inside of the partition wall member, and around the attraction opening, a return member hanging down inside the partition wall member is provided to attract the apple snail to the inside of the partition wall member. , Fish such as loaches and crucian carp, amphibians such as tadpoles (frog larvae), and insects such as diving beetles and larvae (dragonfly larvae) that circulate around the upper periphery of the partition wall material can escape through the lid. It is formed on the outer circumference.
According to the present embodiment, by forming an attracting opening in the center of the lid and providing a return material around the attracting opening, it is possible to prevent escape of the apple snails attracted to the inside of the partition wall material. Further, according to the present embodiment, fish such as loach and crucian carp, amphibians such as tadpoles (frog larvae), or insects such as diving beetles and dragonfly larvae (dragonfly larvae) attracted to the inside of the partition wall material are By utilizing the habit of circling the upper periphery of the partition wall member, it is possible to escape to the outside of the partition wall member through an escape port formed on the outer periphery of the lid.

According to a fourth embodiment of the present invention, in the container for exterminating apple snails according to the third embodiment, the attracting opening is positioned lower than the outer circumference of the lid, and the inclined surface from the outer circumference of the lid to the attracting opening is a net. It is made of material.
According to this embodiment, since the apple snails tend to fall while moving on the net material, they are easily guided to the attraction opening by the inclined surface, and the escape of the apple snails can be prevented.

A container for exterminating apple snails according to an embodiment of the present invention will now be described.
Fig. 1 is a diagram showing a container for exterminating apple snails according to this embodiment, Fig. 1(a) is a conceptual configuration diagram of the extermination container in an installed state, Fig. 1(b) is a photograph of the extermination container from the top, FIG. 1(c) is an enlarged photograph of a main part showing an escape port of the extermination container shown in FIG. 1(b).

A container 10 for exterminating apple snails 1 according to this embodiment has a partition wall member 11 having an upper opening and a lid body 12 for covering the opening formed in the upper portion of the partition wall member 11 .
The partition wall member 11 shown in this embodiment has a cylindrical shape with the upper portion enlarged with respect to the lower portion. The lower part of the partition wall member 11 has a bottom surface as shown in the drawing, but the bottom surface may be omitted. The partition wall member 11 can store water inside, and blocks air communication with the outside. A plastic dust box (diameter 220 mm×height 244 mm, capacity 6.9 L) can be used for the partition wall member 11 .
The lid 12 is preferably made of a mesh material. A stainless steel colander (approximately 21 cm in diameter) can be used for the lid 12 .

At the center of the lid 12 , an attraction opening 13 is formed to attract the apple snail 1 into the partition wall member 11 . The attraction opening 13 is preferably located at a position lower than the outer periphery of the lid 12 . A return member 14 hanging down inside the partition wall member 11 is provided around the guide opening 13 .
When a stainless steel colander is used as the lid 12, the attracting opening 13 and the return member 14 can be formed by cutting the bottom of the colander crosswise and attaching a barb.
At least one escape port 15 is formed on the outer circumference of the lid 12 . Fish such as loaches and crucian carps, amphibians such as tadpoles (frog larvae), or insects such as diving beetles and dragonfly larvae (larvae of dragonflies) are attracted to the inside of the partition wall member 11 and circulate around the upper periphery of the partition wall member 11. can escape from the escape port 15.
By positioning the attraction opening 13 at a position lower than the outer circumference of the lid 12, the area from the outer circumference of the lid 12 to the attraction opening 13 becomes an inclined surface. Since the apple snails 1 tend to fall while moving on the net material, they are easily guided to the attracting opening 13 by the inclined surface, and the escape of the apple snails 1 attracted to the inside of the partition wall member 11 can be prevented.

An attractant bait 16 containing animal oil is placed inside the partition wall material 11 . Water is stored inside the partition wall member 11, and the lure 16 is installed so as to be submerged in the water inside the partition wall member 11.例文帳に追加The bait 16 is placed in a biodegradable nonwoven fabric, the top of the nonwoven fabric or a string for hanging the nonwoven fabric is sandwiched between the upper end of the partition wall member 11 and the lid 12, and fixed with a fixture. A double clip, for example, can be used as the fixture.
The lure bait 16 preferably further contains meat such as chicken or turkey, and may contain fish oil or vegetable oil. Pet food, particularly dog food, can be used as a substitute for the attractant bait 16 containing such ingredients, and a good effect can be obtained with dog food containing 22% or more protein and 9% or more lipid.

As shown in FIG. 1(a), the opening formed in the upper part of the partition wall material 11 is positioned lower than the water surface 2, and at least the lower part of the partition wall material 11 is embedded in the ground 3 of the paddy field. 11 is installed.
In this way, the opening formed in the upper part of the partition wall member 11 is located at a position lower than the water surface 2, and at least the lower part of the partition wall member 11 is buried in the ground 3, thereby easily attracting the apple snail 1 into the partition wall member 11. .

The extermination container 10 according to this embodiment has an attracting opening 13 formed in the center of the lid 12, and a return material 14 is provided around the attracting opening 13, so that the apple snails 1 attracted to the inside of the partition wall material 11 can escape. can be prevented. In addition, fish such as loaches and crucian carps, amphibians such as tadpoles (frog larvae), and insects such as diving beetles and dragonfly larvae (dragonfly larvae) attracted to the inside of the partition wall member 11 are It is possible to escape to the outside of the partition wall member 11 through an escape port 15 formed in the outer periphery of the lid 12 by utilizing the habit of going around the outer periphery. The escape port 15 is smaller than the attracting opening 13 and has a length of about 5 cm and a width of about 1 cm along the edge of the partition wall member 11 .
Peppermint oil agar 17 is preferably installed in extermination container 10 together with lure 16 . If the lure bait 16 contains animal fats and oils, pests such as civets and raccoon dogs tend to gather, possibly damaging the extermination container 10 . By installing the peppermint oil agar 17, an effect of repelling vermin can be expected.

FIG. 2 is a graph showing changes in dissolved oxygen concentration in the extermination container.
FIG. 2 shows the dissolved oxygen concentration (DO) in an attracting bait installation area where 50 g of attracting bait 16 is installed in the extermination container 10 with a capacity of 6.9 L. A non-installation plot in which no lure 16 is installed is shown as a control plot. The attractant bait 16 is dog food containing 28% protein, 9% fat, 7.6% crude fiber, 5.7% ash, and 10.5% moisture, and containing chicken, corn, barley, animal fat, and fish oil. board.
By placing the attractant bait 16 that becomes organic matter in water, a large amount of oxygen is consumed by decomposition of the organic matter by microorganisms. For this reason, it is thought that the dissolved oxygen concentration rapidly decreased in the bait installation area. Generally, a dissolved oxygen concentration of 3 mg/L or more is required for fish and shellfish to survive. When the apple snail 1 enters the extermination container 10, it cannot get out of the extermination container 10, and all the individuals die due to the rapid decrease in the amount of oxygen. Aerobic microorganisms are actively active in the extermination container 10, but when the concentration becomes 2 mg/L or less, anaerobic decomposition occurs and foul-smelling substances are generated.

First, as a preliminary test 1, various feeds such as sugar cane sugar, rice husk powder, shrimp powder, corn powder, bamboo pellets, etc. were given as attracting bait 16 superior to soft rice, and an attracting effect test was conducted. Among these feeds, it was found that they prefer to eat "bamboo pellets". Bamboo belongs to the Poaceae family and is easily available, so it was judged to be highly suitable as the attractant bait 16 .
Next, as a preliminary test 2, rice was cultivated using a plastic boat, divided into a group where bamboo pellets were scattered and a group where bamboo pellets were not sprayed, and the state of damage to the rice was investigated. Four apple snails 1 were released in each plot, and the test was repeated three times.

Fig. 3 is a diagram showing the attraction effect when bamboo pellets are used as lure. ) is a graph showing the results of attraction by scattering bamboo pellets.
As shown in FIG. 3(b), the rice plants were also damaged in the bamboo pellet distribution plot, and no control effect was obtained.
By the way, apple snail 1 eats each other's shells in the aquarium, and only the eaten part turns white.

FIG. 4 is a photograph showing the attracting effect of the attracting bait used in this example.
The dog food used for the lure 16 is the same as that used in FIG.
As a preliminary test 2, 10 apple snails 1 were placed in the center of the tank, and the attracting effect of bamboo pellets (left photo) and dog food (right photo) was verified.
FIG. 4(a) is a photograph at the start of the attraction test, and FIG. 4(b) is a photograph after 8 hours.
As shown in FIG. 4(b), all individuals are attracted to dog food.

FIG. 5 is a graph and photographs showing the attracting effect of the attracting bait used in this example and the result of rice damage verification.
The dog food used for the bait 16 is the same as that used in FIGS.
In the area where dog food was installed, apple snail 1 liked to eat dog food, and no rice damage was observed. On the other hand, in the non-installed area, severe damage was recognized as shown in the photograph.

A container for exterminating apple snails according to another embodiment of the present invention will now be described.
Fig. 6 is a diagram showing a container for exterminating apple snails according to this embodiment, Fig. 6(a) is a conceptual diagram of the installed state of the extermination container, and Fig. 6(b) is a photograph of the bottom surface of the extermination container. be.
FIG. 7 is a photograph showing a method of installing a container for eradicating apple snails according to the present embodiment.

A container 10 for exterminating apple snails 1 according to this embodiment has a partition wall member 11 having an upper opening and a lid body 12 for covering the opening formed in the upper portion of the partition wall member 11 .
The partition wall member 11 shown in this embodiment has a cylindrical shape with the upper portion enlarged with respect to the lower portion, but as shown in FIG. In the installed state, the partition wall member 11 can store water inside, and air circulation with the outside is blocked. A plastic dust box (diameter 220 mm×height 244 mm, capacity 6.9 L) can be used for the partition wall member 11 .
Since the lid 12 and the bait 16 are the same as those in FIG. 1, their description is omitted. Incidentally, in this embodiment, the lid 12 is preferably fixed to the partition wall member 11 .
The extermination container 10 according to this embodiment further comprises an outer wall panel 18 .
The outer wall member 18 has a cylindrical shape with the upper portion enlarged with respect to the lower portion, but has an opening without a bottom member. The outer wall member 18 is preferably the same structural member as the partition wall member 11, and like the partition wall member 11, a plastic dust box (diameter 220 mm x height 244 mm, capacity 6.9 L) can be used. .

As shown in FIG. 6( a ), the openings formed in the upper portions of the partition wall material 11 and the outer wall surface material 18 are positioned below the water surface 2 , and at least the lower portions of the partition wall material 11 and the outer wall surface material 18 are positioned above the paddy field. The partition wall material 11 and the outer wall surface material 18 are installed by embedding them in the ground 3 .
In this embodiment, the extermination container 10 is installed in a paddy field by inserting the outer wall surface material 18 to the position of the hard layer and removing all the mud in the outer wall surface material 18 (Fig. 7(a)). After that, the partition wall member 11 with the lid 12 attached is inserted into the outer wall member 18 (FIG. 7(b)). The installation is completed by positioning the opening formed in the upper part of the partition wall material 11 at a position lower than the water surface 2 (FIG. 7(c)).

By burying the extermination container 10 in the field and setting it under the water surface 2, the apple snails 1 attracted by the attracting bait 16 fall from the attracting opening 13 of the lid body 12 into the partition wall member 11 and are dropped into the partition wall member 11. cannot go outside. Once the extermination container 10 is installed in a paddy field, it can be left until the inside of the partition wall material 11 is filled. By changing the size and capacity of the extermination container 10 according to the conditions of the paddy field in which it is installed and the habitat conditions of the apple snail 1, the number of extermination animals can be increased.
After the partition wall material 11 with the lid 12 attached thereto is taken out from the outer wall surface material 18, the apple snail 1 that has entered the inside of the partition wall material 11 and died is left inside the outer wall surface material 18.例文帳に追加After removing the dead apple snails 1 remaining inside the outer wall member 18, the partition wall member 11 with the lid 12 attached is inserted again into the outer wall member 18, so that the extermination work can be continued. When it is no longer necessary to continue, it is also possible to reclaim with soil and remove the outer wall surface material 18 without removing the dead apple snail 1. - 特許庁
Also in the extermination container 10 according to the present embodiment, since the escape port 15 is formed on the outer periphery of the lid 12, other organisms other than the apple snail 1, such as fish such as loach and crucian carp, and tadpoles (frog larvae). Even if insects such as amphibians, diving beetles, and dragonfly larvae enter the interior of the partition wall member 11, they can escape through the escape port 15. - 特許庁

FIG. 8 is a graph showing the capture results for the deterrent container according to the embodiment shown in FIGS. 6 and 7;
An attractant bait (approximately 50 g) 16 is wrapped in a biodegradable non-woven fabric and added to the extermination container 10 once every 10 days. By installing the extermination container 10 for about one month, the apple snail 1 can be exterminated efficiently.
Using 15 traps per 10 ares, a total of 1748 apple snails 1 could be captured. Almost no damage was confirmed for cultivated Koshihikari. Furthermore, most of the individuals of the apple snail 1 inside the extermination container 10 died due to lack of oxygen. As described above, it was confirmed that the extermination container 10 according to the embodiment can not only capture but also kill shellfish.

A container for exterminating apple snails according to still another embodiment of the present invention will now be described.
Fig. 9 is a diagram showing a container for exterminating apple snails according to this embodiment, Fig. 9(a) is a photograph showing the processing process of the exterminating container, Fig. 9(b) is a photograph of the exterminating container, and Fig. 9(c). is a photograph showing the installation state of the extermination container.

A container 10 for exterminating apple snails 1 according to this embodiment has a partition wall member 11 having an upper opening and a lid body 12 for covering the opening formed in the upper portion of the partition wall member 11 .
The partition wall member 11 shown in this embodiment has a box shape with an upper surface enlarged with respect to a lower surface, and has a bottom surface. The partition wall member 11 can store water inside, and blocks air communication with the outside. A plastic Tupperware can be used for the partition wall member 11 and the lid body 12 .

At the center of the lid 12 , an attraction opening 13 is formed to attract the apple snail 1 into the partition wall member 11 . The attraction opening 13 is positioned lower than the outer periphery of the lid 12 . A return member 14 hanging down inside the partition wall member 11 is provided around the guide opening 13 .
When a plastic tapper is used as the partition wall material 11 and the lid 12, as shown in FIG. Material 14 may be formed.
At least one escape port 15 is formed on the outer circumference of the lid 12 . Fish such as loaches and crucian carps, amphibians such as tadpoles (frog larvae), or insects such as diving beetles and dragonfly larvae (larvae of dragonflies) are attracted to the inside of the partition wall member 11 and circulate around the upper periphery of the partition wall member 11. can escape from the escape port 15.
By positioning the attraction opening 13 at a position lower than the outer periphery of the lid 12 , an inclined surface is formed around the attraction opening 13 . The apple snail 1 can be easily guided to the attracting opening 13 by the inclined surface, and escape of the apple snail 1 attracted into the partition wall member 11 by the return member 14 can be prevented.

Although illustration is omitted, lure bait 16 containing animal oil is placed inside partition wall member 11 also in this embodiment. Water is stored inside the partition wall member 11, and the lure 16 is installed so as to be submerged in the water inside the partition wall member 11.例文帳に追加The lure 16 is placed in a biodegradable nonwoven fabric and put into the partition wall member 11 .
The attracting bait 16 is the same as that of the above embodiment, so the description is omitted.

As shown in FIG. 9(c), the opening formed in the upper part of the partition wall material 11 is positioned lower than the water surface 2, and at least the lower part of the partition wall material 11 is buried in the ground 3 of the paddy field. 11 is installed.
In this way, the opening formed in the upper part of the partition wall member 11 is located at a position lower than the water surface 2, and at least the lower part of the partition wall member 11 is buried in the ground 3, thereby easily attracting the apple snail 1 into the partition wall member 11. .

The extermination container 10 according to this embodiment has an attracting opening 13 formed in the center of the lid 12, and a return material 14 is provided around the attracting opening 13, so that the apple snails 1 attracted to the inside of the partition wall material 11 can escape. can be prevented. In addition, fish such as loaches and crucian carps, amphibians such as tadpoles (frog larvae), and insects such as diving beetles and dragonfly larvae (dragonfly larvae) attracted to the inside of the partition wall member 11 are It is possible to escape to the outside of the partition wall member 11 through an escape port 15 formed in the outer periphery of the lid 12 by utilizing the habit of going around the outer periphery. The escape port 15 is smaller than the attracting opening 13 and has a length of about 5 cm and a width of about 1 cm along the edge of the partition wall member 11 .
Peppermint oil agar 17 is preferably installed in extermination container 10 together with lure 16 . If the lure bait 16 contains animal fats and oils, pests such as civets and raccoon dogs tend to gather, possibly damaging the extermination container 10 . By installing the peppermint oil agar 17, an effect of repelling vermin can be expected.

A container for exterminating apple snails according to still another embodiment of the present invention will now be described.
10A and 10B are views showing a container for exterminating apple snails according to the present embodiment, FIG. (c) is an enlarged photograph of a main part showing an escape port of the extermination container.

A container 10 for exterminating apple snails 1 according to this embodiment has a partition wall member 11 having an upper opening and a lid body 12 for covering the opening formed in the upper portion of the partition wall member 11 .
The partition wall member 11 shown in this embodiment has a conical shape in which the upper portion is enlarged with respect to the lower portion. The partition wall member 11 can store water inside, and blocks air communication with the outside.
The lid 12 is preferably made of a mesh material. A stainless steel colander (approximately 21 cm in diameter) can be used for the lid 12 .

At the center of the lid 12 , an attraction opening 13 is formed to attract the apple snail 1 into the partition wall member 11 . The attraction opening 13 is preferably located at a position lower than the outer periphery of the lid 12 . A return member 14 hanging down inside the partition wall member 11 is provided around the guide opening 13 .
When a stainless steel colander is used as the lid 12, the attracting opening 13 and the return member 14 can be formed by cutting the bottom of the colander crosswise and attaching a barb.
At least one escape port 15 is formed on the outer circumference of the lid 12 . Fish such as loaches and crucian carps, amphibians such as tadpoles (frog larvae), or insects such as diving beetles and dragonfly larvae (larvae of dragonflies) are attracted to the inside of the partition wall member 11 and circulate around the upper periphery of the partition wall member 11. can escape from the escape port 15.
By positioning the attraction opening 13 at a position lower than the outer circumference of the lid 12, the area from the outer circumference of the lid 12 to the attraction opening 13 becomes an inclined surface. Since the apple snails 1 tend to fall while moving on the net material, they are easily guided to the attracting opening 13 by the inclined surface, and the escape of the apple snails 1 attracted to the inside of the partition wall member 11 can be prevented.

Although illustration is omitted, lure bait 16 containing animal oil is placed inside partition wall member 11 also in this embodiment. Water is stored inside the partition wall member 11, and the lure 16 is installed so as to be submerged in the water inside the partition wall member 11.例文帳に追加The lure 16 is placed in a biodegradable nonwoven fabric and put into the partition wall member 11 .
The attracting bait 16 is the same as that of the above embodiment, so the explanation is omitted.
The opening formed in the upper part of the partition wall material 11 is set at a position lower than the water surface 2, and the partition wall material 11 is installed by embedding at least the lower part of the partition wall material 11 in the ground 3 of the paddy field.
In this way, the opening formed in the upper part of the partition wall member 11 is located at a position lower than the water surface 2, and at least the lower part of the partition wall member 11 is buried in the ground 3, thereby easily attracting the apple snail 1 into the partition wall member 11. .

The extermination container 10 according to this embodiment has an attracting opening 13 formed in the center of the lid 12, and a return material 14 is provided around the attracting opening 13, so that the apple snails 1 attracted to the inside of the partition wall material 11 can escape. can be prevented. In addition, fish such as loaches and crucian carps, amphibians such as tadpoles (frog larvae), and insects such as diving beetles and dragonfly larvae (dragonfly larvae) attracted to the inside of the partition wall member 11 are It is possible to escape to the outside of the partition wall member 11 through an escape port 15 formed in the outer periphery of the lid 12 by utilizing the habit of going around the outer periphery. The escape port 15 is smaller than the attracting opening 13 and has a length of about 5 cm and a width of about 1 cm along the edge of the partition wall member 11 .
Peppermint oil agar 17 is preferably installed in extermination container 10 together with lure 16 . If the lure bait 16 contains animal fats and oils, pests such as civets and raccoon dogs tend to gather, possibly damaging the extermination container 10 . By installing the peppermint oil agar 17, an effect of repelling vermin can be expected.

Thus, in the method for exterminating the apple snail 1 of the present invention, the lure bait 16 contains animal fats and oils, water is retained inside the partition wall member 11, and the lure bait 16 is placed inside the partition wall member 11. By installing so as to be immersed in water, the apple snail 1 is attracted to the inside of the partition wall material 11, and the dissolved oxygen in the water inside the partition wall material 11 is reduced by the decomposition of organic matter by microorganisms, and the inside of the partition wall material 11 It kills the apple snail 1 attracted to the water by reducing the dissolved oxygen.
According to the present invention, by placing the lure 16 containing animal oil and fat so as to be submerged in the water inside the partition wall material 11, the water retained inside the partition wall material 11 is generated by aerobic microorganisms. Since a large amount of oxygen is consumed with the decomposition of organic matter and the concentration of dissolved oxygen decreases, the apple snail 1 becomes oxygen-deficient and dies. Thus, the method for exterminating the apple snail 1 according to the present invention not only captures the apple snail 1, but also kills and exterminates the apple snail.

INDUSTRIAL APPLICABILITY The method and container for exterminating apple snails according to the present invention can be used not only in paddy fields but also in waterways and reservoirs.

1 Squid apple snail 2 Water surface 3 Underground 10 Extermination container 11 Partition wall material 12 Lid body 13 Attraction opening 14 Return material 15 Escape port 16 Attraction bait 17 Peppermint oil agar 18 Outer wall material

Claims (4)

A method for exterminating apple snails by installing a partition wall material with an upper opening in water and attracting apple snails to the inside of the partition wall material using an attracting bait,
The lure contains animal fats and oils,
water is retained in the interior of the partition wall material;
By placing the attracting bait so as to be submerged in the water inside the partition wall member, the apple snails are attracted to the inside of the partition wall member, and the organic matter is decomposed by microorganisms to the inside of the partition wall member. and reducing the dissolved oxygen of the water, and killing the apple snail attracted to the inside of the partition wall material by reducing the dissolved oxygen. The opening formed in the upper part of the partition wall material is positioned lower than the water surface,
2. The method for exterminating the apple snail according to claim 1, wherein the partition wall member is installed by burying at least the lower portion of the partition wall member in the ground of the paddy field. A container for exterminating apple snail used in the method for exterminating apple snail according to claim 1 or claim 2,
The opening formed in the upper part of the partition wall member has a lid,
forming an attracting opening for attracting the apple snail into the interior of the partition wall member at the center of the lid;
A return member hanging in the interior of the partition wall member is provided around the guide opening,
Attracted to the inside of the partition wall material and circling around the upper periphery of the partition wall material, such as fish such as loach and crucian carp, amphibians such as tadpoles (frog larvae), or insects such as diving beetles and larvae (dragonfly larvae). A container for exterminating apple snails, characterized in that an escape port through which worms can escape is formed on the outer periphery of the lid. The attraction opening is positioned lower than the outer periphery of the lid,
4. The container for exterminating apple snails according to claim 3, wherein the inclined surface extending from the outer periphery of the lid body to the attraction opening is formed of a net material.

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