Frogs and their lice are more predators. Some algae, protozoa, aquatic insects, mammals, birds, reptiles, fish, and even frogs are their natural enemies, and sometimes the damage is quite serious.
One, algae
1. Qingni moss is a general term for filamentous green algae commonly found in earthen or cement ponds. It includes some species of the three genera of Spirogyra, Dictyostelium and Dioscorea in the sclereid family. In the spring, as the temperature of the water rises, it germinates in the shallow waters of the pond. The early color is dark green and sticks to the bottom of the pool like hair. During aging, the color turns yellow-green, and the filaments break off from the bottom of the pool and become cotton-like, forming a mass. A tangled mess, floating water.
Hazard: The main hazards are crickets, especially small beaks often plunged into the blue mud moss and become entangled with the filaments causing death. If it reproduces in large quantities, it will consume nutrients in the pond, make the pool water thinner, inhibit the reproduction of plankton, and thus affect the growth of alfalfa.
Prevention and control methods: Before breeding, each pond area uses quicklime 50-100g. After the water is poured, the whole pool spills the clear pond, which can kill the blue mud moss, or spread it on the green mud moss with grass and wood ash. The green mud moss cannot be obtained. Sunshine cannot die of photosynthesis. For ponds that have been stocked with oysters, a copper sulfate solution with a concentration of 0.2-1.0 mg/l can be used to splash the whole pool.
2 Microcystis is algae of Cyanophyta. The cells are spherical and have pseudo vacuoles. Many cells come together to form irregular groups. In the high temperature, nitrogen content or organic matter rich in water can reproduce in large quantities. There are many organic substances in the Frog Pond and its Dianchi Lake, and Microcystis often reproduces in large quantities to form a copper-green "water spray" called "lake lake."
Hazard: There is a layer of glial membrane outside the algae cells, which cannot be digested after feeding. If the breeding is excessive, the population decomposes and produces toxic substances at the stage of decline, which causes the lack of oxygen in Dianchi Lake and causes the death of crickets.
Control methods: Prevention and cure methods for the same with green mud.
3. Aquarium is a species of green algae. The algae bodies are interconnected by many cylindrical cells to form a reticular population. Each mesh is made up of 5 to 6 cells, and the assembled algae form a net, so it is called water net algae.
Hazard: The water net algae is like an open "roof net" in a shallow pond. It is gnawed and died when it is crawled into it. The degree of damage is more serious than that of blue mud.
Control methods: Prevention and cure methods for the same with green mud.
Second, crickets (grasshopper)
Anthropophagism. The general body is flat, cylindrical or elliptical, and the body is soft. There are suckers before and after.
Hazard: The blister can be sucked into the skin of the frogs to suck blood and cause great harm.
Control methods: Drain the pool water, and clear the pool with quicklime.
Third, insects
1 The dragon's otters and dragon's otters are insects of the Coleoptera that are oval in shape. The otters are also called water clips. It is the collective name for larvae such as dragons, dragons, and dragons.
Hazard: Adult dragon bugs and larvae are harmful to earthworms. The breeding stage of quail is the breeding season of otters, so the damage is serious.
Control methods: Before the stocking, each pond area is made of quick lime 50-100g. After the water is disinfected, the whole pool is splashed with the clear pond to disinfect the water fleas. When the pond is filled with water, it must be filtered with a dense net to prevent the dragonfly and leeches from entering. With the water into the breeding pond. A small amount of kerosene can also be used to kill leeches.
2. The matchmaker is a genus of the genus Polygonaceae or Carpinus mellifera, also known as the cockroach.
Hazard: Hong Niang Hua is widely distributed in China, mainly harming small and medium-sized cramps.
Control methods: Prevention and treatment methods for the same dragon fleas and leeches.
3. Song algae, also known as Yang swimming or worms, belongs to the family of Yang swimming.
Hazard: In the water during the day, eating quails, flying out of the water at night to endanger the frog, the piercing muzzle piercing the frog and frog sucking body fluids, the harm is more serious.
Control methods: Prevention and treatment methods for the same dragon fleas and leeches.
Fourth, fish, cockroaches, cockroaches, eels, etc
Hazard: Mainly carnivorous and omnivorous fish ingest frog eggs and cockroaches.
Control methods: Complete clean pool work, use a dense mesh filter at the water inlet and outlet to prevent miscellaneous fish and aquatic insects from entering.
V. Mammals
1. Rats are the main natural enemies of frogs. Predatory mites and young frogs are particularly harmful to young frogs.
2. The mole is also known as the weasel. Sexual cruelty is harmful to adult frogs and young frogs. The harm is quite serious.
3. Mink is a semi-aqueous animal. The water rushes out and perches in the caves on the shore of the pond. It is a very serious hazard to both frogs and frogs.
The prevention and control of mammals mainly depends on killing or finding a cave at any time for killing; for a large number of rodents, rodenticides can be used to kill a large area, but it is necessary to pay attention to the safety of other animals when rats are introduced.
6. Amphibians
Mainly some frogs, they will eat frogs breeding quails, the harm is more serious. Amphibians can be captured and controlled.
Seven, reptiles
1. Snakes live for some time in the water, preying on frogs and fleas, the harm is more serious. Some snakes eat predatory forest frogs on land.
For the control of snakes, killing can be used.
2. Commonly known as soft-shelled turtle. Often inhabits rivers, lakes and ponds. Active in the water, crawling quickly after the water, often eating young frogs and quail. Prevention methods can take the capture method.
Eight birds
Suitable for water life and eating frogs and their crickets. There are the following types:
Herons, pond herons, kingfishers, gulls, crows, wild ducks, etc. can prey on frog eggs, cockroaches and frogs. The domestic duck must also pay attention to care. For the control of birds, drive or catch can be used.
1. Both sterile and non-sterile masks are made in a 100,000-class dust-free workshop. Other indicators such as filtration efficiency or airflow resistance are all the same requirements. The difference lies in the final sterilization process of the finished product. The presence or absence of.
2. The sterile type is mainly because the things that need to be entered in medical places such as ICUs and operating rooms that need to strictly control the microbial environment are sterile, and will not cause other bacterial infections in patients.
3. Non-sterile masks can meet the microbial limit indicators after being made in the above-mentioned 100,000-level dust-free workshop. Product introduction of disposable medical surgical masks. In other words, non-sterile masks are strictly in accordance with the medical device management method The management is safe enough to meet the daily protection needs of the public.
Medical Face Mask,non woven medical mask,medical face mask 3 layers,disposables medical face mask
Suzhou Xuanweicheng Biotechnology Co., Ltd , https://www.xwc-medical.com