Parasitic diseases often occur during the feeding process of crucian carp splash stage, of which the two parasites of wheelworm and ringworm are the most common, which often bring certain losses to farmers, how to do a good job in scientific management and timely diagnosis and treatment is the most critical. Next, I will introduce the prevention and diagnosis and treatment of wheelworms and ringworms, hoping to bring you some help.
Early prevention: treatment of fish ponds
Crucian carp water spray should be treated in the fish pond before going down the pond, and the treatment of the general fish pond takes at least a week or so to be briefly divided into two stages
Stage 1: Clearing and disinfection of fish ponds
The fish pond must be clean and thorough, and after the exposure treatment, the fish pond should be disinfected with 50-100 kg of quicklime per mu after it is all cleaned up
The second stage is the treatment of fish pond water bodies
As the saying goes, "raise fish first to raise water", "good water raises good fish", water quality is very important for fish farming, so if you want to raise crucian carp well, you must learn to distinguish between good and bad water quality. An important indicator to judge the quality of water in the process of breeding is the color of the water and its changes. According to the color of the water, the type and quantity of plankton in the water can be judged, so that corresponding medication and fertilization measures can be taken to improve water quality. Only by controlling the water quality in the breeding process can we improve the growth rate of crucian carp, reduce diseases, and achieve the purpose of high yield, high quality and high efficiency. When the fish pond after the storage of water body treatment takes about a week, the first thing to do is insecticidal treatment, kill the parasites in the water body and the intermediate host of spore worms such as red worms, you can use insecticides such as enemy insects, and then wait for two days with detoxification agents for water detoxification, the third day for disinfection treatment can use quicklime or povidone iodine, bleach powder, chlorine dioxide, etc., the fourth day every other day, the fifth day can be fertilized water, Fertilizer water using fermented farm manure or bio-organic fertilizer can also use fertilizer water ointment and other biological fertilizer water preparations for fertilizer water, and then a few days later when the color of the water body is bean green or yellow-green and the water sample detection found that the water body rotifers and other biological bait reaches 3 to 5 per milliliter, you can guide the release of fish, before releasing fish, you can take a small amount of fry to test the water and measure the water body ammonia nitrogen, salt and dissolved oxygen can be found to be no problem after the fry can be released.
Diagnosis of wheelworms:
Wheelworm in the early stage is generally parasitic on the surface of the fish body such as the tail fin, when found that the fry appear in the water to spin, the body is black, the phenomenon of swimming alone is likely to be infected with parasites, at this time can be fished for several fish fry with the above symptoms for microscopic examination found that as shown in the figure shaped like a tire and rotating the movement of the animal can be diagnosed with wheelworm disease
2. Diagnosis of ringworms
The sick fish deepens in body color, thin body, slow swimming, decreased appetite, significant edema of the gills, increased mucus, gill filaments open and gray and dark, swimming alone, gradually thin and dead, flattened, the front of the head has 4 black eye spots, the mouth is near the eye point, the expanded part under the mouth is called pharynx, and the postpharyngeal canal is extended into the posterior end of the body to form a ring. The rear end of the worm body has a fixing disc, consisting of 1 pair of large anchor hooks and 7 pairs of small edge hooks, which are fixed to the gills of the fish. Ringworms are hermaphrodites. There is an ovary in the posterior part of the worm body, and the sperm nest is behind the ovary. Microscopic examination of the diseased fish can find the insect body as shown in the figure:
3. Treatment of wheelworms and ringworms
Enemy insects 0.7 per acre of the whole pond sprinkling, can have a good effect, after sprinkling enemy insects to open an aerator, stir the water body, the next day use the antidote for water detoxification treatment. At the same time, it can also be sprinkled once a month for preventive treatment and can also have a certain preventive effect on sporangia
Finally, I hope this article can bring some help to the small partners who like aquatic products!