Capturing device and method for blocking alternation of ampullaria gigas generations
Technical Field
The invention relates to a capturing device and a capturing method for blocking alternation of ampullaria gigas generations.
Background
Pomacea canaliculata of the order gastropoda in the phylum mollusca of the genus Pomacea was introduced in the continental of China in 1981. The snails are wide in feeding property, large in food consumption, strong in adaptability and fast in growth and reproduction, are abused and disaster-causing in most Asian countries, seriously harm aquatic crops such as rice and dry crops near water areas, cause serious yield reduction and even no harvest of the crops, become extremely serious agricultural pests, and are listed as one of foreign invasive species in China at present. In addition, ampullaria gigas is also a host for zoonosis, angiostrongylus cantonensis. When the ampullaria gigas which is not heated fully is eaten, parasites such as angiostrongylus cantonensis and the like can be infected in a human body, meningitis and other diseases can be caused, and serious patients can die.
The ampullaria gigas can cause disasters and is characterized by extremely strong reproductive capacity. The breeding season of the ampullaria gigas is 3-11 months per year, wherein 5-8 months are the breeding season. Each snail lays eggs one by one, and the egg laying amount is 200-1000. Can lay eggs 20-40 times in one year, and the egg laying amount is 3-5 ten thousand grains. 1 female snail co-propagates more than 32.5 million young snails in two generations in 1 year, and the fertility is extremely strong. The reproductive characteristics of Pomacea canaliculata are used to lay eggs at night on the surface of dry objects or plants above the water surface, such as stems, trench walls, ridges and the like.
Currently, the prevention and treatment of ampullaria gigas are mainly as follows: 1. applying molluscicide to kill mollusks. The method has the following defects: the chemical agent has high toxicity, is easy to remain crops and water, and pollutes the environment. 2. A biological control method for duck breeding, fish breeding and the like. The method has the following defects: the mode needs to have certain culture conditions and facilities, and the ducks can cause damage to crop seedlings such as partial treading, pecking and the like. 3. Manually picking snails or removing egg masses. The method has the following defects: the labor cost is high, and the efficiency is low. Chinese patent No. CN200810121170.X discloses a Pomacea canaliculata egg mass trapping device which can trap Pomacea canaliculata to lay eggs in a centralized manner, and trap and treat the egg masses in a centralized manner to kill the Pomacea canaliculata, but cannot trap and kill the Pomacea canaliculata. One oviposition snail can oviposit 20-40 times per year. Moreover, if the egg mass in the device is not removed in time, newly hatched young snails fall into the field and regenerate a generation.
Disclosure of Invention
The invention aims to provide a capturing device and a capturing method for blocking the generation alternation of ampullaria gigas, which not only have simple structure, but also trap oviposition ampullaria gigas by using a physical method and prevent the oviposition ampullaria gigas and young snails from escaping, and have simple and convenient use method.
The technical scheme of the invention is as follows: the utility model provides a block alternate capture device of ampullaria gigas generation, includes the flat picture peg, the surface spraying of flat picture peg has the material layer of plant smell, is provided with the tube-shape of making by transparent material on the flat face of flat picture peg upper portion both sides respectively and catches the cage, the upper end that the cage was caught to the tube-shape is provided with transparent netted roof, and the lower extreme that the cage was caught to the tube-shape transversely installs the latticed check door that can only upwards open and under the effect of gravity self-closing, the net specification of netted roof and latticed check door is 20 meshes ~ 30 meshes.
Furthermore, the inner cavity of the cylindrical catching cage is provided with grid-shaped one-way doors which are transversely arranged from top to bottom at intervals and divide the cylindrical catching cage into a plurality of chambers.
Further, latticed check door includes transparent grid plate, the lateral wall that flat picture peg one side was kept away from to the cage is caught with the tube-shape to the grid plate is articulated mutually, the tube-shape is caught and is located the hinged end downside of grid plate on the cage and is provided with the baffle that prevents the downward upset of grid plate.
Furthermore, air holes are distributed on the side wall of the cylindrical catching cage at intervals, and the diameter of each air hole is 2-3 mm.
Further, the cylindrical catching cage is square-column-shaped, the transverse section of the cylindrical catching cage is 8-10 cm long, or the cylindrical catching cage is circular-column-shaped, the transverse section of the cylindrical catching cage is 8-10 cm long, and the height of the cylindrical catching cage is 30-50 cm.
Furthermore, the lower part of the flat inserting plate is provided with a telescopic section which can be telescopically adjusted, and the lower end of the telescopic section is a tip end.
Furthermore, the flat inserting plate is made of hard and bionic materials, and the smell of the material layer can be sweet corn flavor, cane shoot flavor or lotus root flavor.
Furthermore, the bionic color of the flat inserting plate is light green, grass green or yellow green.
A method for blocking the alternation of ampullaria gigas generations comprises a capturing device for blocking the alternation of the ampullaria gigas generations, and comprises the following steps:
1) after crops are harvested 10-12 months per year, trimming ridges, filling gaps and leakage, and leveling soil blocks or straws higher than the ridges;
2) leading water and irrigating until the water surface is level with the ridges around and no soil or straws are exposed out of the water surface;
3) inserting the flat plug boards of the capturing devices into the field, and putting 500-1500 capturing devices per mu according to the density of screw openings;
4) when the ampullaria gigas needs to leave the water surface for spawning, the ampullaria gigas enter the cylindrical catching cage and get trapped in the cylindrical catching cage, and when 3 months in the next year and before crops are sowed, the once catching device is harvested in a centralized manner, and the catching device containing the spawning ampullaria gigas is taken away.
Furthermore, the height of the flat inserting plate is adjusted according to the water level, so that the distance between the bottom of the cylindrical catching cage and the water level is not more than 5 cm.
Compared with the prior art, the invention has the following advantages:
1) the capturing device for blocking the alternation of the Pomacea canaliculata generation is simple in structure, traps the oviposition Pomacea canaliculata by using a physical method, prevents the oviposition Pomacea canaliculata and young Oillea canaliculata from escaping, and is simple and convenient to use;
2) according to the reproductive characteristics that the ampullaria gigas leaves the water surface and lays eggs on the surface of a dry object or plant above the water surface, the ampullaria gigas is induced to lay eggs and simultaneously kills the laying snails by combining farmland production, and the method has the characteristics of safety, environmental protection, high efficiency, good effect and the like;
3) the female snails, the snail eggs and the young snails are collectively killed and killed, so that the efficiency is greatly improved;
4) in 12-3 months per year, before the numerous breeding of the snails, centralized killing is carried out, so as to achieve the purpose of reducing the initial population base number;
5) compared with the situation that other devices need to collect snail eggs in time, if the newly hatched young snails are not removed in time, the newly hatched young snails fall into the field and regenerate one generation, the method only needs to put in once and harvest once in a concentrated manner, and the generation alternation of the snails can be prevented.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is an enlarged view of area A of FIG. 1 in accordance with the present invention;
FIG. 3 is a view of the invention from the direction B of FIG. 1;
in the figure: 10-flat inserting plate 11-material layer 20-cylindrical catching cage 21-net-shaped top plate 22-air holes 30-net-shaped one-way door 31-net plate 32-longitudinal pin shaft 33-baffle plate.
Detailed Description
In order to make the aforementioned features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below, but the present invention is not limited thereto.
Refer to fig. 1 to 3
A capturing device for blocking the alternation of ampullaria gigas generations comprises a flat inserting plate 10, wherein a material layer 11 with plant odor is sprayed on the surface of the flat inserting plate, so that the ampullaria gigas which lay eggs can be better attracted to climb onto the flat inserting plate. The cylindrical catching cages 20 made of transparent materials are respectively arranged on the flat surfaces on the two sides of the upper part of the flat inserting plate, and the pair of transparent cylindrical catching cages are convenient for light transmission and improve the utilization rate. The upper end of the cylindrical catching cage is provided with a transparent meshed top plate 21, the lower end of the cylindrical catching cage is transversely provided with a meshed one-way door 30 which can only be opened upwards and can be automatically closed under the action of gravity, so that after the egg-laying ampullaria gigas enter the cylindrical catching cage, the meshed one-way door automatically turns downwards to complete closing, the egg-laying ampullaria gigas are trapped in the cylindrical catching cage to prevent the ampullaria gigas from escaping downwards, the meshed specifications of the meshed top plate and the meshed one-way door are 20-30 meshes, so that the hatched young ampullaria gigas are also closed in the cylindrical catching cage, and the generation alternation of the ampullaria gigas is blocked.
In this embodiment, 2~4 latticed one-way doors that transversely set up and cut apart the cage into a plurality of cavities are installed at the interval from top to bottom to the inner chamber of cage is caught to the tube-shape to improve the device utilization ratio, can catch more ampullaria gigas of laying eggs. The chamber can be also internally provided with ampullaria gigas baits so as to better lure the ampullaria gigas to lay eggs.
In this embodiment, latticed check door includes transparent grid plate 31, the lateral wall that the cage was kept away from flat picture peg one side is caught to the latticed board and tube-shape is articulated mutually through longitudinal pin axle 32 or hinge, the tube-shape is caught and is located the hinged end downside of grid plate on the cage and is provided with the baffle 33 that prevents the grid plate and overturn downwards. Thereby preventing the fence panel from being turned downward and forming a one-way door.
In this embodiment, the side wall of the cylindrical catching cage is provided with the air holes 22 at intervals so as to ensure the ventilation in the cylindrical catching cage, and the cylindrical catching cage is transparent, breathable and not oppressive. The diameter of the air holes is 2-3 mm, so that young snails are prevented from escaping from the air holes.
In the embodiment, as the height of the adult snail shell is about 5-7 cm, in order to better trap the egg-laying ampullaria gigas and ensure that the ampullaria gigas enter the cylindrical catching cage, the cylindrical catching cage is in a square column shape, the transverse section of the cylindrical catching cage is a square with the side length of 8-10 cm, or the cylindrical catching cage is in a round column shape, and the transverse section of the cylindrical catching cage is a round with the diameter of 8-10 cm; the height of the cylindrical catching cage is 30-50 cm, so that more egg-laying ampullaria gigas can be accommodated in the cylindrical catching cage.
In this embodiment, the lower part of the flat inserting plate is provided with a telescopic section which can be telescopically adjusted, and the lower end of the telescopic section is a pointed end so as to be better inserted into a field. The telescopic section can be a flat telescopic rod and is provided with a locking bolt, so that the length of the deformation inserting plate can be better adjusted.
In this embodiment, the flat insertion plate is made of a hard material with a bionic color, such as a bamboo chip or a thin wood board, and the surface of the bamboo chip or the wood board is brushed with the bionic color, the bionic color of the flat insertion plate is light green, grass green or yellow green, and then a material layer with plant odor is sprayed on the flat insertion plate, wherein the odor of the material layer can be sweet corn odor, cane shoot odor or lotus root odor, and the like, so that the ampullaria gigas can climb upwards through the flat insertion plate.
A method for blocking the alternation of ampullaria gigas generations comprises a capturing device for blocking the alternation of the ampullaria gigas generations, and comprises the following steps:
1) after crops are harvested 10-12 months per year, trimming ridges, filling gaps and leakage, and leveling soil blocks or straws higher than the ridges;
2) leading water and irrigating until the water surface is level with the ridges around and no soil or straws are exposed out of the water surface;
3) inserting the flat inserting plate of the capturing device into the field, adjusting the height of the flat inserting plate according to the water level to enable the distance between the bottom of the cylindrical capturing cage and the water surface to be not more than 5cm, and putting 500-1500 capturing devices per mu according to the density of screw openings;
4) the ampullaria gigas needs to leave the water surface to enter the cylindrical catching cage and be trapped in the catching cage, and lay eggs in the catching cage, and because the meshes are small, the hatched young ampullaria gigas cannot escape; and (4) when the next year is 3 months, harvesting the primary capturing devices in a centralized manner before crops are sowed, and taking the capturing devices containing the spawning ampullaria gigas away and processing the captured devices.
It will be apparent to those skilled in the art that the above-described embodiments of the present invention are merely exemplary and various modifications can be made without inventive faculty, and it is intended to cover all the modifications, alterations, substitutions, and alterations without departing from the spirit and scope of the present invention.