High profit and high risk! In recent years, the area of sea cucumber farming has become larger and larger, and the problem of parasitic diseases has become more and more prominent. Among them, shield ciliates are one of the "diehards". Shield ciliate can infect seedlings and seedlings of young ginseng, may occur throughout the year, generally more often in May-August, the disease infection rate is high, spread fast, treatment is difficult, often accompanied by cross-infection of bacteria, can cause a large number of deaths of juvenile ginseng, young ginseng, the general pathogen is shield ciliate, also known as rotting insects.
Shield ciliate live appearance is melon-shaped, 50-75 microns long, 20-50 microns wide, with a long tail hair at the posterior end, when the small nucleus splits first, the large nucleus divides, and then the middle of the worm body is crossed, divided into two new individuals. Shield ciliates are a facultative parasite that can live on its own from the outside world, but in some cases can invade the host camp to live parasitic life.
Due to intensive seedlings and breeding, high density, high excrement, excessive bait, resulting in excessive eutrophication of water quality, and accidental daily operations that cause sea cucumber injuries or a large number of insects in the water body, it may invade the sea cucumber and cause the outbreak of the disease. Shield ciliates initially accumulate in the surface wounds, then invade the tissue, multiply in large numbers in the ginseng, and later spread through the deep tissue, resulting in necrosis and disintegration of the ginseng tissue.
How to control shield ciliate disease of sea cucumbers?
The large-scale occurrence of ciliate disease in the sea cucumber shield is inseparable from the living environment conditions of sea cucumbers, first of all, the environmental conditions are good, coupled with the strong disease resistance and stress resistance of sea cucumbers, the probability of being infected is small.
First, the breeding environment
1. The aquaculture water should be strictly screened and filtered, and the outlet can be filtered with a 300 mesh sieve bag before use. Regularly sprinkle water bodies with plant repellents to reduce shield ciliates in water bodies.
2. Remove the dirt in the bottom of the pond and the drainage ditch in time, keep the drain clean, and regularly disinfect it with quicklime, etc.
3. When sub-ponding seedlings or replacing the attachment base, the mesh bag collecting ginseng seedlings should be avoided from contacting the bottom of the drainage ditch, and a special seedling collector should be used to prevent cross-contamination of harmful microorganisms in the drainage ditch. At the same time, careful operation is taken to avoid sea cucumber injuries.
4. Shorten the change interval and keep the surface of the attached base clean. Change the pond at the right time, the breeding density should not be too large, and create a good water quality environment.
Second, reduce ciliates in the body
1. Choose regular bait, conditionally disinfect and then feed. Kills pathogenic pathogens such as pathogenic bacteria and ciliates in the bait, preventing "disease from entering the mouth". The bait should not be excessive, and adhere to the principle of "four certainties".
2. Daily mixing mixing le Chang eucalyptus essential oil, 1 bottle of mixing ingredients 20 pounds, feeding at each meal, reduce the chance of ciliate infection. Its component eucalyptus has the effect of fungal and insect double antibody, strong penetration, does not harm sea cucumbers, does not harm water bodies, and kills shield ciliates instead of killing, with a better spilling effect, with a reference amount of 1-2ppm.
Frequent observation and frequent inspection, early detection and early treatment, isolation and disinfection of diseased ginseng and pathogenesis pool. It is difficult to cure at the beginning of the disease, and if the shield ciliate invades the depths of the sea cucumber tissue and the decaying skin is severe, it has returned to the sky. It can be used in the early stages of the disease
Adjust the water temperature, water quality, with antibacterial drugs to treat the wound, while mixing Lechang 1 bottle of mixing ingredients 10 pounds, medicinal bath 5g / basin full treatment, generally will have obvious effects.