High polyiodide: a good medicine for disinfection of fish fingerlings
Winter and spring is the season of high incidence of fish water mildew, fish disinfection must be based on the prevention and control of water mildew. After the specific drug malachite green was banned, polyiodine is an ideal drug for the prevention and treatment of water mildew.
The full name of polyiodine is compound S polyiodine. It has a strong killing effect on bacteria, viruses and fungi, and its bactericidal ability is more than 10 times higher than that of povidone iodine. In addition, high polyiodine contains high content of traditional Chinese medicine, which has the function of rapid wound healing for fish species injured by net-pulling operation and long-distance transportation.
The usage of high polyiodine: fish seeds are soaked and sterilized, 10 grams per cubic meter of water, immersed for 10 ~ 15 minutes; the whole pond is sprinkled with 100 ~ 150 milliliters per mu deep. Fish seed disinfection should be timely, as far as possible to put fish seed on the same day for disinfection. Do not use salt to disinfect fish in winter and spring, so as not to destroy the mucus on the surface of the fish and cause the fish to die.
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Sensory judgment of the quality of pellet feed for fish
With the rise of intensive aquaculture, the use of fish pellet feed has been very common. But at present, there are many feed brands on the market. There are also great differences in quality and grade. Some farmers may feel at a loss about this and can only choose according to the advertising of the manufacturer or the evaluation of a certain feed by their peers, or even try it by constantly changing different brands of feed, and so on. to some extent, these practices have a certain degree of blindness. A preliminary use of senses summed up in practical experience is now recommended.
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Prevention and treatment of rotten foot disease of soft-shelled turtle
Rotten foot disease of soft-shelled turtle is a disease with high death rate in factory production of soft-shelled turtle in recent years. it is not only difficult to cure, but also easy to leave scars and affect the appearance of sales. it is one of the headache diseases of soft-shelled turtle in soft-shelled turtle breeding enterprises. according to years of practice and relevant research, the author introduces the causes and prevention methods of rotten foot disease of soft-shelled turtle, which can be used as a reference for breeding units. First, the symptoms of rotten foot disease of soft-shelled turtle start at the beginning, the sick soft-shelled turtle eats normally, with the development of the disease, the activity decreases, the reaction is slow, the appetite decreases or even stops eating.
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