Precautions for egret fish culture beware of egret plague?

On September 7, 20 17, the annual Millennium solar term is coming. As a solar term at the turn of summer and autumn, the weather changes obviously in the Millennium season, which is the time for people to pay attention to prevent common diseases caused by seasonal changes, and for aquaculture practitioners, it is also the time to pay close attention to fish health. Then today's calendar will sort it out for you, and the precautions for egret breeding.

1. Shrimp's physique is decreased and its resistance is poor. In the Millennium season when various vitamins and nutrients are supplemented, the weather is complex and changeable, and the temperature difference between day and night is large. During the second solar term, the reproduction speed of pathogenic microorganisms accelerated, and the diseases of shrimp culture increased obviously. You can choose a disinfectant that kills pathogens and microorganisms with less irritation and continue to disinfect the pool water.

White dew is also prone to "algal bloom", which will cause shrimp poisoning. Antidotes can be used to neutralize algal toxins in order to achieve pH balance. In the later stage of culture, due to the influence of weather temperature difference, phytotoxicity and growth rate, the shrimp's physique will obviously decline and its resistance will be poor. It is necessary to supplement vitamins, aquatic multivitamins, immune polysaccharides and other nutrients according to the condition.

Second, the management of fish ponds for aquaculture farmers must not be relaxed before and after the Millennium. The Millennium is the season of alternating summer and autumn. The weather gets cold, the water temperature drops, and the temperature difference between day and night is large. The rapid change of living environment is likely to cause fish to get sick.

The "Bailu epidemic" occurred before and after the Bailu solar term, and there are many factors that affect the pathogenicity of the fish, such as bacteria, parasites and environmental changes. If you are not careful, it will easily lead to a large number of fish deaths. I would like to remind everyone to do a good job in the prevention of "white deer plague", change water frequently, check water quality and temperature regularly, find problems and solve them as soon as possible, ensure fresh feed, and conduct flexible breeding according to the breeding environment.

In order to adapt to the change of environment, the metabolism of fish is weakened, and the demand for external nutrients is relatively reduced. Proper control of fish's food intake is beneficial to enhance fish's resistance to diseases. Otherwise, it will not only waste feed, but also increase the cost. And it is not good for the growth of fish, and even has serious consequences. Feeding shall be carried out in strict accordance with the principle of "four determinations". And master it flexibly according to the weather, water quality and fish activities.

Do a good job in the food hygiene of fish. At this time, the environment is conducive to the reproduction of disease organisms, a large number of reproduction. When bacteria are swallowed by fish with food, it will cause fish diseases. Therefore, the feed should be fresh, not moldy and palatable, which can meet the nutritional needs of fish before feeding. The feeding tools should be disinfected, and the feeding grounds should be kept clean and disinfected regularly. The leftovers were fished out.

Pay attention to the change of water quality. After the hot and rainy weather in summer, the quality of pond water is generally fat, some of which have begun to age, and many harmful bacteria have accumulated in the water. Therefore, it is necessary to regularly apply quicklime or chlorine-containing bactericide to adjust the water quality, control the water level as much as possible, keep the water quality fat, lively, tender and cool, and properly fertilize the thin fish ponds.

Keep patrolling the pond in the morning and evening. Due to the shorter illumination and the lower water temperature, the photosynthesis of phytoplankton is weakened, and the dissolved oxygen in water is also relatively reduced. At this time, the probability of fish floating head increases. So pay attention to patrol the pond at night and in the early morning and observe the floating head of the fish. If there is a problem, rescue it in time. If oxygen-increasing equipment is installed, it should be started when moving, and the start-up time should be appropriately extended or chemical oxygen-increasing agent should be injected for first aid. If dead fish are found, they should be fished out in time and treated harmlessly. Prevention of fish diseases should be done well in advance to reduce the occurrence of fish diseases and achieve twice the result with half the effort.

Prevention of fish diseases There are mainly three kinds of diseases before and after Bailu. One is bacterial fish diseases, such as gill rot of grass carp, erythroderma, enteritis, bacterial bleeding of fish, etc., which can be externally applied with chlorine-containing drugs or bromochlorohydantoin, combined with oral drugs such as Sanhuang Powder and Kejunwei. The second is parasitic diseases, such as anchovy, herring, Chinese herring and melon disease. , available avermectin, trichlorfon, etc.

The third is flooding syndrome, which mainly includes fish pond hypoxia, ammonia nitrogen poisoning and other syndromes. You can start the aerator and fill it with oxygen for first aid. Biological agents such as Bacillus subtilis, photosynthetic bacteria, yeast and lactic acid bacteria can also be used reasonably to improve the ecological environment of water, decompose underwater organic matter, purify water, inhibit pathogenic bacteria and reduce diseases. The "White Dew Plague" is fierce, and there are many kinds of diseases, which often cause great losses to cultured fish.

Do a good job in management logs, including at least three records of production, sales and drug use, so as to make statistical analysis, adjust breeding measures in time, and accumulate experience and test for making production plans and improving breeding methods in the future.

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