Special food attractant for ampullaria gigas as well as preparation method and application of special food attractant

Abstract

The invention provides a special food attractant for pomacea canaliculata and a preparation method and application thereof, and belongs to the technical field of biological control, the special food attractant for pomacea canaliculata comprises, by mass, 10 parts of chaenomeles speciosa residues, 10 parts of corn flour, 80 parts of flour and 10-50 parts of a sugar solution, the concentration of the sugar solution is 50-200 g / L, and the chaenomeles speciosa residues are prepared by fermenting chaenomeles speciosa. The chaenomeles speciosa residue, the corn flour, the flour and the cane sugar are adopted as raw materials to prepare the food attractant special for the ampullaria gigas, the food attractant can play a good role in trapping the ampullaria gigas in natural environments such as cities, lakes, rice-shrimp co-cropping rice fields, rice-fish co-cropping rice fields and flowing water areas, and the food attractant is wide in application scene and has the characteristic of specially attracting the ampullaria gigas; the method has certain application value and great practical significance in the field of pomacea canaliculata prevention and treatment.

Description

Technical Field

[0001] The present invention relates to the technical field of biological control, and particularly relates to a special food attractant for Pomacea canaliculata, a preparation method thereof, and an application thereof. Background Art

[0002] As a worldwide alien invasive species, Pomacea canaliculata has rapidly spread from its origin in the Amazon River Basin in South America to various regions around the world such as North America, Asia, and Africa in a short period of time. Relying on its strong survival ability, it vigorously squeezes the living space of local species, occupies a wide ecological niche, from rural areas to urban areas, from farmlands to wetlands, causing significant losses to local agriculture and ecological security.

[0003] At present, the control methods for Pomacea canaliculata in various countries mainly include chemical control, biological control, and physical control. Among them, capturing with food bait can maximize the avoidance of environmental pollution. Now, there are already many physical capture devices for Pomacea canaliculata combined with attractants to trap Pomacea canaliculata. Trapping Pomacea canaliculata can not only avoid polluting the water environment, but also improve the control efficiency, quickly and accurately control the density of Pomacea canaliculata in the occurrence area, and can also create economic benefits by processing the collected Pomacea canaliculata. It is an ideal prevention and control means. Through research, it is found that the food of juvenile snails mainly consists of Wolffia arrhiza, humus, and green feed, and adult snails mainly feed on plant-based foods, including duckweed, vegetables, and the leaves of fruits and melons, and also like to eat the rotten meat of animals in the water. However, among the currently used food attractants, there are common foods that are preferred by various animals such as many kinds of field snails, snails, slugs, crayfish, and eels. There are few studies on a specific and efficient food attractant for trapping Pomacea canaliculata. Summary of the Invention

[0004] In view of the technical problems existing in the background art, the present application provides a special food attractant for Pomacea canaliculata, a preparation method thereof, and an application thereof, aiming to solve the technical problem of the low specificity of the existing food attractant for trapping Pomacea canaliculata.

[0005] In a first aspect, an embodiment of the present application provides a special food attractant for Pomacea canaliculata, which, by mass fraction, includes 10 parts of Fructus Chaenomelis speciosa residue, 10 parts of corn flour, 80 parts of flour, and 10 - 50 parts of sucrose solution. The concentration of the sucrose solution is 50 - 200 g / L, and the Fructus Chaenomelis speciosa residue is prepared by fermenting fresh Fructus Chaenomelis speciosa.

[0006] In some embodiments, the preparation method of the Fructus Chaenomelis speciosa residue includes the following steps: washing and deseeding fresh Fructus Chaenomelis speciosa, then crushing it, mixing it with sugar water, potassium metabisulfite solution, and active yeast, stirring evenly and fermenting, and filtering after fermentation is completed. The obtained fruit residue is the Fructus Chaenomelis speciosa residue.

[0007] In some embodiments, the mass ratio of fresh Chaenomeles speciosa, sugar water, potassium metabisulfite solution and active yeast is 1000:(2000~3000):(0.05~0.1):(0.2~0.25); the concentration of the sugar water is 0.05% to 1%.

[0008] In some embodiments, the active yeast includes at least one of Saccharomyces cerevisiae, Saccharomyces bayanus, and Saccharomyces aceti.

[0009] In some embodiments, the fermentation conditions are: the fermentation temperature is 25~30°C, and the fermentation time is 7 to 10 days.

[0010] In some embodiments, the food attractant is wrapped with a gauze bag.

[0011] In a second aspect, an embodiment of the present application provides a method for preparing a special food attractant for Pomacea canaliculata, including the following steps: Mix the Chaenomeles speciosa residue, corn flour, and flour evenly according to the ratio, and then add a sucrose solution thereto and knead into a sphere; Dry the sphere and wrap a gauze bag outside the sphere to obtain a special food attractant for Pomacea canaliculata.

[0012] In some embodiments, it further includes wrapping a gauze bag outside the food attractant.

[0013] In some embodiments, the drying temperature is 100~120°C, and the drying time is 1 to 2 hours.

[0014] In a third aspect, an embodiment of the present application provides a method for trapping Pomacea canaliculata. Fix the food attractant in a Pomacea canaliculata trapping device, place the Pomacea canaliculata trapping device in water for 1 to 5 days, and immerse the food attractant in water to trap Pomacea canaliculata in the water.

[0015] Different from the prior art solutions, the beneficial effects of the present application include: 1. The present application uses Chaenomeles speciosa residue, corn flour, flour and sucrose as raw materials to prepare a special food attractant for Pomacea canaliculata, which can play a good role in trapping Pomacea canaliculata in natural environments such as urban lakes, rice-crayfish co-cultivation paddy fields, rice-fish co-cultivation paddy fields, and flowing waters. It has a wide range of application scenarios and the characteristic of specifically attracting Pomacea canaliculata, and has certain application value and great practical significance in the field of Pomacea canaliculata control.

[0016] The residue of Chaenomeles speciosa is rich in vitamins and various minerals. Combined with a specific fermentation process, it can be converted into a food attractant raw material that is attractive to Pomacea canaliculata. The residue of Chaenomeles speciosa fermented and prepared by the fermentation method in this application contains 19 amino acids such as tryptophan and tyrosine, which has a strong attracting effect on Pomacea canaliculata; the residue of Chaenomeles speciosa contains fructose and sucrose, which are the foods preferred by Pomacea canaliculata; Pomacea canaliculata mainly forages through smell and tiny food molecules in the water environment. The fermented residue of Chaenomeles speciosa not only retains a strong fruity aroma but also has a brewing wine aroma, and the unique smell produced has a strong attraction to Pomacea canaliculata; the fiber components rich in the residue of Chaenomeles speciosa can further enhance the strength of the food attractant and extend the usage time of the food attractant.

[0017] In this application, all-plant components are used and no animal protein is added, which can greatly reduce the attracting power of the food attractant to crayfish, fish, etc., thus ensuring the specific attracting characteristics of the food attractant in this application to Pomacea canaliculata.

[0018] Sucrose is also added to the food attractant in this application, which can improve the attracting power of the food attractant to Pomacea canaliculata.

[0019] 2. In this application, the food attractant is wrapped in a gauze bag. Compared with directly putting the food attractant, the number of juvenile snails attracted by putting the food attractant wrapped in a gauze bag is less, and there is no obvious difference in the number of adult snails attracted. Both direct putting and putting the food attractant wrapped in a gauze bag can be used simultaneously during putting, which can increase the trapping number of Pomacea canaliculata while extending the usage time of the food attractant. The gauze bag can keep the agglomerated food attractant immersed in the water body and maintain a fixed shape for a long time, enabling the food attractant to be slowly released in the water body, greatly extending the usage time of the food attractant, and reducing the trapping cost and labor intensity of Pomacea canaliculata.

[0020] 3. Using the residue of Chaenomeles speciosa as a special food attractant component for Pomacea canaliculata not only adds a new way for resource utilization of the residue of Chaenomeles speciosa to the existing treatment methods of the residue of Chaenomeles speciosa, realizes the recycling of resources, reduces environmental pollution, but also can greatly reduce the raw material cost of the food attractant, which is conducive to the large-scale popularization and application of the food attractant. It is a practice of efficient resource utilization and ecological sustainable development, and has great practical significance, ecological value and economic value for controlling the threat of Pomacea canaliculata to the ecological environment, maintaining the ecological balance of the ecosystem and protecting biodiversity.

[0021] The above description is only an overview of the technical solution of this application. In order to understand the technical means of this application more clearly, it can be implemented according to the content of the specification. And in order to make the above and other purposes, features and advantages of this application more obvious and understandable, the following specific embodiments of this application are specifically given. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] To more clearly illustrate the technical solution of this application, the accompanying drawings used in this application will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.

[0023] Figure 1 Schematic diagram of the T-slot device in this application; In the figure, 1. T-slot; 2. Pomacea canaliculata; 3. Food attractant A; 4. Food attractant B. Specific embodiments

[0024] The embodiments of the technical solution of this application will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of this application, so they are only examples and cannot be used to limit the protection scope of this application.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the description of the specification, claims and above accompanying drawings of this application are intended to cover non-exclusive inclusion.

[0026] In the description of the embodiments of this application, technical terms such as "first" and "second" are only used to distinguish different objects and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity, specific order or primary-secondary relationship of the indicated technical features. In the description of the embodiments of this application, "a plurality" means more than two unless otherwise specifically defined.

[0027] Referring to "embodiments" herein means that specific features, structures or characteristics described in connection with the embodiments can be included in at least one embodiment of this application. The phrase appears in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0028] In the description of the embodiments of this application, the term "and / or" is only a description of the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists alone, A and B exist simultaneously, and B exists alone.

[0029] In the description of the embodiments of the present application, the term "a plurality" refers to two or more (including two). Similarly, "multiple groups" refers to two or more groups (including two groups), and "multiple pieces" refers to two or more pieces (including two pieces).

[0030] At present, the control methods of Pomacea canaliculata in various countries mainly include chemical control, biological control and physical control. Among them, using food bait to capture can maximize the avoidance of environmental pollution. Now, there are already many physical capture devices for Pomacea canaliculata combined with attractants to trap Pomacea canaliculata. Trapping Pomacea canaliculata can not only avoid polluting the water environment, but also improve the control efficiency, quickly and accurately control the density of Pomacea canaliculata in the occurrence area, and can also create economic benefits by processing the collected Pomacea canaliculata. It is an ideal prevention and control method. However, the current attractants mainly include common foods that are favored by various animals such as field snails, snails, slugs, crayfish, and eels. There are few studies on specific and efficient food attractants for trapping Pomacea canaliculata.

[0031] In order to solve the technical problem of the low specificity of the existing food attractants for trapping Pomacea canaliculata, the present application provides a special food attractant for Pomacea canaliculata, its preparation method and application. Among them, by using papaya residue, corn flour, flour and sucrose as raw materials, a special food attractant for Pomacea canaliculata is prepared, which can play a good role in trapping Pomacea canaliculata in natural environments such as urban lakes, paddy fields with rice and crayfish co-culture, paddy fields with rice and fish co-culture, and flowing waters. Its application scenarios are extensive and it has the characteristic of specifically attracting Pomacea canaliculata, and it has certain application value and great practical significance in the field of Pomacea canaliculata control.

[0032] In the first aspect, the embodiments of the present application provide a special food attractant for Pomacea canaliculata, which includes, by mass, 10 parts of papaya residue, 10 parts of corn flour, 80 parts of flour and 10 - 50 parts of sucrose solution. The concentration of the sucrose solution is 50 - 200 g / L, and the papaya residue is prepared by fermenting fresh papaya.

[0033] In the technical solution of the embodiments of the present application, during the brewing process of papaya wine, a large amount of papaya residue, a by-product regarded as waste, will be generated. The current common resource utilization methods are to use papaya residue to produce coarse fiber foods or as raw materials for extracting dietary fiber, polyphenols and other substances, and papaya residue can also be processed into the main raw materials for livestock and poultry breeding feed or fertilizer production. Papaya residue is rich in vitamins and various minerals, and combined with a specific fermentation process, it can be transformed into a food attractant raw material that is attractive to Pomacea canaliculata. The fiber components rich in papaya residue can also further enhance the strength of the food attractant and extend the use time of the food attractant.

[0034] Through the feeding preference experiment of adult Pomacea canaliculata, the present application discovered a new and significantly effective food attractant component for Pomacea canaliculata, papaya residue, developed it into a low-cost special food attractant for Pomacea canaliculata and conducted an effect evaluation experiment, which can more efficiently and specifically trap Pomacea canaliculata in combination with Pomacea canaliculata capture devices.

[0035] In some embodiments, the preparation method of the Chaenomeles speciosa (Sweet) Nakai residue comprises the following steps: cleaning and seeding fresh Chaenomeles speciosa (Sweet) Nakai, then breaking it up, mixing it with sugar water, potassium metabisulfite solution and active yeast, stirring evenly and then fermenting, and filtering after fermentation is completed, and the obtained fruit residue is the Chaenomeles speciosa (Sweet) Nakai residue.

[0036] In some embodiments, the mass ratio of fresh Chaenomeles speciosa (Sweet) Nakai, sugar water, potassium metabisulfite solution and active yeast is 1000:(2000 - 3000):(0.05 - 0.1):(0.2 - 0.25); the concentration of the sugar water is 0.05% - 1%.

[0037] In some embodiments, the active yeast includes at least one of Saccharomyces cerevisiae, Saccharomyces pastorianus and Saccharomyces apiculatus.

[0038] In some embodiments, the fermentation conditions are: the fermentation temperature is 25 - 30 °C, and the fermentation time is 7 - 10 d.

[0039] In the technical solution of the embodiment of the present application, the Chaenomeles speciosa (Sweet) Nakai residue is rich in vitamins and various minerals, and can be converted into a food attractant raw material attractive to Pomacea canaliculata by combining with a specific fermentation process. The Chaenomeles speciosa (Sweet) Nakai residue prepared by fermentation using the fermentation method in the present application contains 19 kinds of amino acids such as tryptophan and tyrosine, and has a strong attracting effect on Pomacea canaliculata; the Chaenomeles speciosa (Sweet) Nakai residue contains fructose and sucrose, which are foods preferred by Pomacea canaliculata; Pomacea canaliculata mainly forages through smell and tiny food molecules in the water environment. The fermented Chaenomeles speciosa (Sweet) Nakai residue not only retains a strong fruity aroma but also has a brewing wine aroma, and the unique smell produced has a strong attraction to Pomacea canaliculata; the fiber components rich in the Chaenomeles speciosa (Sweet) Nakai residue can further enhance the strength of the food attractant and extend the use time of the food attractant.

[0040] In some embodiments, the food attractant is wrapped with a gauze bag on the outside.

[0041] In the technical solution of the embodiment of the present application, compared with directly putting the food attractant, the number of young snails attracted by putting the food attractant wrapped with a gauze bag is less, and there is no obvious difference in the number of adult snails attracted. Direct putting and putting the food attractant wrapped with a gauze bag can be adopted simultaneously during putting, so as to increase the trapping number of Pomacea canaliculata while extending the use duration of the food attractant.

[0042] Second, the embodiment of the present application provides a preparation method of a special food attractant for Pomacea canaliculata, comprising the following steps: Stir the Chaenomeles speciosa (Sweet) Nakai residue, corn flour and flour evenly according to the ratio, then add a sucrose solution thereto and knead into a sphere; Dry the sphere, wrap a gauze bag outside the sphere to obtain the special food attractant for Pomacea canaliculata.

[0043] In some embodiments, it further includes wrapping a gauze bag outside the food attractant.

[0044] In some embodiments, the drying temperature is 100~120 °C and the drying time is 1~2 h.

[0045] In a third aspect, an embodiment of the present application provides a method for trapping Pomacea canaliculata. Fix the food attractant in a Pomacea canaliculata trapping device, place the Pomacea canaliculata trapping device in water for 1~5 days to immerse the food attractant in water, and then the Pomacea canaliculata in the water can be trapped.

[0046] In the technical solution of the embodiment of the present application, the Pomacea canaliculata trapping device adopted in the present application can be a common eel or lobster trapping device on the market, or the Pomacea canaliculata trapping device disclosed in Patent No. 202322142919.1 and Patent No. 202322127260.2.

[0047] Some specific embodiments are listed below. It should be noted that the embodiments described below are exemplary and are only used to explain the present application and should not be construed as a limitation to the present application. For those without specific techniques or conditions noted in the embodiments, the techniques or conditions described in the literature in this field or according to the product specifications are followed. For reagents or instruments without the manufacturer noted, they are all conventional products that can be obtained through commercial purchase.

[0048] I. Preparation method The production method of the Chaenomeles speciosa (Sweet) Nakai residue in the following examples and comparative examples is as follows: After rinsing and sterilizing fresh Chaenomeles speciosa (Sweet) Nakai with clean water, remove the seeds and break it into pieces. Add sugar water, a small amount of potassium metabisulfite solution with a concentration of 0.02%, and active yeast according to twice the mass of the papaya. Stir evenly and then ferment. The fermentation temperature is 25~30 °C. After 7 days of fermentation, separate the fruit residue to obtain the Chaenomeles speciosa (Sweet) Nakai residue.

[0049] Example 1 Mix the Chaenomeles speciosa (Sweet) Nakai residue, flour, and corn flour evenly according to a mass ratio of 1:8:1, and then add 500 ml of sucrose water with a sucrose concentration of 200 g / L per kilogram of the mixed powder as a binder. Knead it into a dough, then roll it into spheres with a diameter of 3 cm and a weight of 5 g, and evenly coat a thin layer of flour on the surface of the spheres. Bake at 120 °C for 2 hours and then cool to room temperature to obtain a special food attractant for Pomacea canaliculata.

[0050] Example 2 Mix the Chaenomeles speciosa (Sweet) Nakai residue, flour, and corn flour evenly according to a mass ratio of 1:8:1, and then add 500 ml of sucrose water with a sucrose concentration of 200 g / L per kilogram of the mixed powder as a binder. Knead it into a dough, then roll it into spheres with a diameter of 3 cm and a weight of 5 g, and evenly coat a thin layer of flour on the surface of the spheres. Bake at 120 °C for 2 hours and then cool to room temperature to obtain a special food attractant for Pomacea canaliculata.

[0051] Comparative Example 1 Mix the papaya residue, flour, and cornmeal evenly at a mass ratio of 1:8:1, and then add 500 ml of water per kilogram of the mixed powder as a binder. Knead into a dough, roll it into spheres with a diameter of 3 cm and a weight of 5 g, and evenly coat a thin layer of flour on the surface of the spheres. Bake at 120 °C for 2 hours and then cool to room temperature. Wrap a layer of gauze outside the spheres to obtain a special food attractant for Pomacea canaliculata.

[0052] Comparative Example 2 Mix the flour and cornmeal evenly at a mass ratio of 9:1, and then add 500 ml of sucrose solution with a sucrose concentration of 200 g / L per kilogram of the mixed powder as a binder. Knead into a dough, roll it into spheres with a diameter of 3 cm and a weight of 5 g, and evenly coat a thin layer of flour on the surface of the spheres. Bake at 120 °C for 2 hours and then cool to room temperature. Wrap a layer of gauze outside the spheres to obtain a special food attractant for Pomacea canaliculata.

[0053] Comparative Example 3 Use Hydrilla verticillata as a food attractant. Hydrilla verticillata is one of the aquatic plants that Pomacea canaliculata likes to eat.

[0054] II. Test Method 1. Test method for the feeding preference of Pomacea canaliculata: Use the T-shaped groove 1 device as shown in Figure 1 . The horizontal part of the T-shaped groove 1 is 42 cm long and 6 cm wide. The vertical part of the T-shaped groove 1 is connected to the middle of the horizontal part. The vertical part of the T-shaped groove 1 is 18 cm long and 6 cm wide. Conduct feeding preference tests on 2 pairs of adult Pomacea canaliculata for different foods, including the following steps: Place the T-shaped groove 1 on an indoor experimental bench with uniform illumination, and keep the room temperature at 25 - 30 °C. Add tap water that has been standing for 6 hours to the T-shaped groove 1 to a depth of 6 cm. Place 2 Pomacea canaliculata at one end of the vertical part away from the horizontal part so that the 2 Pomacea canaliculata are completely submerged, and keep the water temperature at 25 - 28 °C. Make the food attractant A 3 into spheres with a diameter of 3 cm and a weight of 5 g, and randomly fix the food attractant A 3 in the same group vertically at one port of the horizontal part of the T-shaped groove, and vertically fix another food attractant B 4 in the same group at the other port. The food attractant B is the food attractant prepared in each example or comparative example, or a natural food that Pomacea canaliculata likes, such as Hydrilla verticillata.

[0055] Randomly select 1 adult Pomacea canaliculata with a shell height between 30 - 60 mm from the prepared Pomacea canaliculata and place it at the bottom of the T-shaped groove. The T-shaped groove is as shown in Figure 1As shown, record the selection results of Pomacea canaliculata within 30 minutes, with the criterion being that the snail comes into contact with the attractant. Pomacea canaliculata that do not make a choice within 30 minutes are not included in the statistical results. After each recording of the observation results, replace all the aerated water, Pomacea canaliculata, and attractant, and clean the T-shaped groove with tap water to avoid interference between successive experiments. The valid data for each group of Pomacea canaliculata reaches 60 times, with 30 individuals each for male and female Pomacea canaliculata. Statistically analyze the frequencies of Pomacea canaliculata in each group choosing the food attractants on both sides using the binomial distribution test to obtain the p-value. The significance level is set at p = 0.05, that is, when p ≤ 0.05, there is a significant difference between the comparison objects; and calculate the attraction rate based on the selection frequencies.

[0056] 2. Field evaluation test of the food attractant for Pomacea canaliculata, including the following steps: In October 2024, an experiment was carried out in a flowing water channel beside a rice-crayfish co-culture farm of Jiarun Agricultural Development Co., Ltd. in Jianli City, Jingzhou, Hubei Province (29.90258900°N, 112.90104000°E). The Pomacea canaliculata trap cage selected was a device for capturing adult Pomacea canaliculata made at zero cost from mineral water bottles (Patent No.: 202322127260.2).

[0057] Before use, fix 50 grams of the special food attractant for Pomacea canaliculata in the center of the trap cage with a rope, and ensure that the attractant is immersed in water after the device is put in place to better exert the attracting effect of the attractant.

[0058] 3. Specificity evaluation test of the food attractant for Pomacea canaliculata, including the following steps: In August 2024, an experiment was carried out in a paddy field with rice-crayfish co-culture at a certain location in Dalinzhai, Longshan Sub-district Office, Luoshan County, Xinyang City, Henan Province (32.13099400°N, 114.49415700°E), and Pomacea canaliculata were trapped using a Pomacea canaliculata trap cage; in September 2024, an experiment was carried out in a paddy field with rice-fish co-culture at a certain location in Yangchang Community, Wantanhe Town, Longli County, Qiannan Bouyei and Miao Autonomous Prefecture, Guizhou Province (26.29074576°N, 107.04727560°E), and Pomacea canaliculata were trapped using a Pomacea canaliculata trap cage.

[0059] Before use, fix 50 grams of the special food attractant for Pomacea canaliculata in the center of the trap cage with a rope, and ensure that the attractant is immersed in water after the device is put in place to better exert the attracting effect of the attractant.

[0060] III. Analysis of test results of each example and comparative example Carry out the Pomacea canaliculata feeding preference test on the food attractants prepared in Comparative Examples 1 - 3 and the food attractant prepared in Example 1 respectively, and the test results are shown in Table 1 below.

[0061] Table 1 Frequencies and p-values of Pomacea canaliculata in each group choosing the sugared food attractants on both sides

[0062] As can be seen from Table 1, the apple snail has the highest possibility of choosing the food attractant prepared in Example 1. In Comparative Example 1, sucrose was not added, and the possibility of selection decreased significantly, indicating that sucrose can improve the attractiveness of the food attractant to the apple snail; in Comparative Example 2, papaya residue was not added, and the possibility of selection decreased compared with Example 1; in Comparative Example 3, hydrilla was used as the food attractant, and hydrilla is one of the aquatic plants that apple snails like to eat, indicating that in the presence of hydrilla, the papaya residue plus sugar food attractant still has an attracting effect on apple snails, and in this application, the papaya residue plus sugar food attractant has the strongest attracting effect on apple snails.

[0063] (2)Respectively place the food attractants in Examples 1-2 in the apple snail trapping cage, place the apple snail capture device in the water body for 5 days, immerse the food attractant in the water, trap the apple snails in the water body, and check the number of apple snails captured in the trapping cage every 24 hours. The test results are shown in Table 2 below.

[0064] Table 2 Test results of trapping apple snails with the food attractants prepared in Examples 1-2

[0065] As can be seen from Table 2, within the five-day test period, the number of adult apple snails trapped by the food attractant is relatively stable, and the number of juvenile apple snails trapped shows a decreasing trend day by day. The food attractant can be continuously used for 5 days or more when wrapped in a gauze bag.

[0066] Compared with directly putting the food attractant, the number of juvenile apple snails trapped by putting the food attractant wrapped in a gauze bag is less, and there is no obvious difference in the number of adult apple snails trapped. Direct putting and putting the food attractant wrapped in a gauze bag can be used simultaneously during putting, increasing the number of trapped apple snails while extending the service life of the food attractant.

[0067] (3)Place the food attractant in Example 2 in the apple snail trapping cage, place the apple snail capture device in the rice-crayfish co-culture paddy field and the rice-fish co-culture paddy field for 5 days respectively, immerse the food attractant in the water, trap the apple snails in the water body, and check the number of apple snails captured in the trapping cage once after 5 days of trapping. The test results are shown in Table 3 below.

[0068] Table 3 Test results of the capture situation of apple snails in the working paddy field

[0069] As can be seen from Table 3, when using the food attractant in the examples of this application to trap apple snails in the rice-crayfish co-culture paddy field and the rice-fish co-culture paddy field, there are only adult and juvenile apple snails in the trapping cage within five days, and no other organisms such as shrimps or fish are captured, indicating that the food attractant in this application has attractiveness and specificity to apple snails.

[0070] It should be noted that this application is not limited to the above-described embodiments. The above embodiments are merely examples, and embodiments having the same composition in essence as the technical idea and achieving the same effects within the scope of the technical solution of this application are all included in the technical scope of this application. In addition, within the scope of not departing from the gist of this application, various modifications that can be conceived by those skilled in the art to the embodiments, as well as other ways constructed by combining some of the constituent elements in the embodiments, are also included in the scope of this application.

Claims

1. A special food attractant for golden apple snails, characterized in that: The method comprises 10 parts of papaya residue, 10 parts of corn flour, 80 parts of flour and 10-50 parts of sucrose solution by weight. The concentration of the sucrose solution is 50-200 g / L. The papaya residue is obtained by fermenting papaya.

2. The special food attractant for Pomacea canaliculata according to claim 1, characterized in that: The preparation method of Xuan papaya residue comprises the following steps: washing and removing the seeds of Xuan papaya and then breaking it, mixing it with sugar water, potassium metabisulfite solution and active yeast, stirring it evenly and then fermenting it, filtering it after the fermentation is completed, and the obtained pomace is Xuan papaya residue.

3. The special food attractant for Pomacea canaliculata according to claim 2, characterized in that: The mass ratio of the papaya, sugar water, potassium metabisulfite solution and active yeast is 1000:(2000-3000):(0.05-0.1):(0.2-0.25); the concentration of the sugar water is 0.05%-1%.

4. The special food attractant for Pomacea canaliculata according to claim 2, characterized in that: The active yeast comprises at least one of wine yeast, pasteurian yeast and advanced yeast.

5. The special food attractant for Pomacea canaliculata according to claim 2, characterized in that: The fermentation conditions are as follows: the fermentation temperature is 25-30°C and the fermentation time is 7-10 days.

6. The special food attractant for Pomacea canaliculata according to claim 1, characterized in that: The food attractant is wrapped with a gauze bag.

7. A method for preparing a special food attractant for Pomacea canaliculata as claimed in any one of claims 1 to 6, characterized in that: The steps include: Mix papaya residue, corn flour and flour in a uniform ratio, then add sucrose solution and knead into a ball; The sphere is dried to prepare a special food attractant for golden apple snails.

8. The method for preparing the special food attractant for Pomacea canaliculata according to claim 7, characterized in that: The invention also comprises a gauze bag wrapped outside the food attractant.

9. The method for preparing the special food attractant for Pomacea canaliculata according to claim 7, characterized in that: The drying temperature is 100-120° C., and the drying time is 1-2 hours.

10. A method for trapping golden apple snails, characterized in that: The method comprises the following steps: fixing the food attractant described in any one of claims 1 to 6 in a device for catching apple snails, placing the device for catching apple snails in a water body for 1 to 5 days, so that the food attractant is immersed in the water, and the apple snails in the water body can be lured.

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