BROOKWORM DISEASE OF LIONFISH
Pathogen: the worm is grouper valve insect belongs to tube mouth, oblique tube family, side view can see back uplift, ventral surface is flat, worm ventral view is oval or oval, size 45-80 × 29-53um, ventral front has a round orifice, can be telescopic, the front and back of the insect body has cilia, there is a valve body like hair behind the large nucleus, this worm is propagated by split method.
Epidemic situation: the disease is prevalent in hot days and mainly harms 20-50mm fish fry. The water temperature is above 25 ℃. It is more common in high-density aquaculture and cage, with rapid incidence, high infection rate and high mortality rate.
Symptoms: it is mainly parasitic in the gills of fish fry, when a large number of parasites are gray-white, there are a lot of dirt on the Gill, irregular white spots are formed on the rest surface, the pectoral fins extend vertically from the body, and the diseased fish often float on the surface and swim slowly. It can be judged by microscope.
Control methods: 1. Soak the fish in fresh water + 20ppm furazolidone for 2-5 minutes. 2. Bathe the fish with seawater + 200ppm formalin for 20 minutes under the condition of increasing oxygen. 3. Soak in seawater + 2ppm copper sulfate for 10-20 minutes (small fish use carefully).
- Prev
The killer of koi: copper and zinc
The author believes that you are not surprised: copper and zinc in the water will kill koi. Of course, this is not news to the author. What the author means is that before you hear the story that copper-connected heaters release large amounts of copper into the water, thus killing all koi, did you think that copper and zinc will kill your koi? Maybe many of us haven't heard such a story yet. Before I tell you this, the author reviews some of his own history. Of course, I have been raising it for quite a long time.
- Next
Dragon-bodied Phoenix tail shrimp
[dish name] Dragon body Phoenix tail shrimp [raw material] 30 fresh sea shrimps, 75 grams of cooked ham meat, 15 grams of salted shiitake mushrooms, 50 grams of winter bamboo shoots, about 10 grams of scallion. [production process] 1, Lentinus edodes, winter bamboo shoots, green onion slices, ham strips; 2, sea shrimp to keep the tail shell; 3, flatten the ham with a knife, place the ham strips horizontally on the meat noodles near the shrimp tail, and then roll up the shrimp tail, that is, dragon body and Phoenix tail shrimp, put in the pan over oil, showing the shape of dragon body and Phoenix tail; 4
Related
- On the eggshell is a badge full of pride. British Poultry Egg Market and Consumer observation
- British study: 72% of Britons are willing to buy native eggs raised by insects
- Guidelines for friendly egg production revised the increase of space in chicken sheds can not be forced to change feathers and lay eggs.
- Risk of delay in customs clearance Australia suspends lobster exports to China
- Pig semen-the Vector of virus Transmission (4)
- Pig semen-the Vector of virus Transmission (3)
- Five common causes of difficult control of classical swine fever in clinic and their countermeasures
- Foot-and-mouth disease is the most effective way to prevent it!
- PED is the number one killer of piglets and has to be guarded against in autumn and winter.
- What is "yellow fat pig"? Have you ever heard the pig collector talk about "yellow fat pig"?