In winter, the temperature is low, the amount of fish feeding and activity is relatively small, and many breeding friends are prone to neglect the management of fish ponds. During the wintering period, the pond is less water-changing, and the metabolic waste of various aquatic organisms accumulates in the water, which will produce a large number of toxic products, resulting in the deterioration of the water quality of the fish pond and providing conditions for the breeding of parasites; at the same time, the deterioration of the living environment will also greatly reduce the resistance of fish during the wintering period, and the probability of infection with various diseases, including parasites, will increase.
In winter, the water temperature is low, and the use of insecticides has little effect, so insecticide is generally not recommended in winter. But prevention and internal deworming can be done and must be done. Fish bodies originally have more or less certain parasites before wintering, coupled with the quiet breeding and latenting during the wintering period, once the water temperature rises, these parasites are easy to multiply in large quantities, so that the fish body is infected in large quantities.
Pathogen, immunity and environment are the three basic factors that constitute the pathogenesis of the body, so the prevention and control of parasites should start from these three aspects to comprehensively prevent and control parasites in fish ponds during the wintering period.
1. Enhance immunity. During the wintering of fish, the physical consumption is larger, so it is necessary to pay attention to strengthening the nutrition of fish, enhancing the resistance of fish to pathogens such as external parasites, and effectively preventing the outbreak of parasitic diseases. Choose a better compound feed to feed; add immunomodulatory products vc, eucommia leaf extract, etc. to the feed to enhance the physique of fish; and also feed liver-protecting bile acids to prevent the occurrence of hepatobiliary disease.
2. Improve the breeding environment. In the winter, we can not relax the management of fish ponds, we must do a good job in oxygenation and bottom improvement, stabilize the water level and water temperature, in order to reduce the stress response of fish and the resulting disease damage and death losses; but also more patrol ponds, pay attention to observe the changes in pond water color and fish activities, so that abnormalities can be found in time, deal with abnormalities, and prevent losses from expanding. Improving the living environment of fish during the wintering period can reduce the rate of disease infection and prevent the outbreak of various parasitic diseases.
3. Internal insect repellent to inhibit pathogens. Insecticides have little effect at low temperatures, and the use of insecticides can have more or less toxic side effects. Can be regularly mixed with safe and non-toxic insect repellents, such as eucalyptus essential oil preparations, natural eucalyptus essential oil from Australia, plant ingredients are non-toxic and harmless, non-polluting, no drug residue, can effectively drive away a small number of parasites carried by the overwintering fish itself, prevent large outbreaks of parasites, and have significant effects on aquatic parasites such as sporidium, wheelworm, ringworm, three-generation insect, anchorhead loach.
The source of the article is the official website of Shandong Longchang Dongbao.