Prevention of crayfish diseases is more important than cure. how to prevent and cure crayfish body surface diseases

Breeding crayfish, no disease early prevention, disease early treatment, prevention is more important than treatment. Usually shrimp ponds, fishing gear, food farms to use more drugs for disinfection, encounter diseases, timely treatment. When using the drug, the method, time and dose of the drug should be well mastered to avoid drug damage and achieve the purpose of prevention and treatment.

crawfish

Crayfish body surface diseases can be treated by washing method and whole pool sprinkling method. Before washing and sprinkling, dissolve two or more drugs respectively, and then pour them into the container for use. The container had better choose the barrel, the cabin of the small wooden boat or the ceramic water tank. To soak the crayfish, it is necessary to grasp the time and density. The soaking time can be determined according to the water temperature and the health status of shrimp species. If the water temperature is high and the shrimp species are weak, the soaking time will be shortened accordingly; if the water temperature is low and the shrimp species are strong, the soaking time will increase, generally 10 minutes and 30 minutes. The soaking density is 15,000 to 20,000 shrimps with a body length of 2cm per cubic meter of water, or 2000,2500 parent shrimp. Shrimp species should not be kept too dense to prevent crayfish from dying from lack of oxygen. In addition, the activity of shrimp species should be observed at all times when soaking. If you find a floating head or struggle, you should quickly pick up the shrimp species and put them in clean water to prevent death.

When using medicine to sprinkle in the whole pool, the dosage should be calculated correctly, and after dissolving evenly, it should be sprinkled in the whole pool to prevent drug damage or fail to achieve the prevention and control effect. For example, the whole pool sprinkled with bleach, the concentration of more than 2 times can lead to crayfish death. Some drugs are easy to fail because they are improperly kept or stored for a long time, so it is best to buy and use them now when in use, otherwise it is not only a waste of money, but also has no therapeutic effect.

The time of drug sprinkling should be chosen on a sunny day, 10: 00 a. M. or 4: 00 p. M. to avoid applying medicine in direct sunlight at noon, otherwise it will reduce the efficacy of the drug. If it is really necessary to apply the drug on a cloudy day, it can be done at noon. After application, crayfish activity should be observed at the edge of the pool, and if there is anything abnormal, new water should be injected in time to avoid accidents.

Do not feed the crayfish while sprinkling medicine. the medicine should be spilled 2 or 3 hours after feeding. When sprinkling the whole pool, start from the upwind and sprinkle it to the downwind in turn, because the liquid sprinkled at the beginning is thicker, and the effect of the wind can be used to promote the liquid to spread throughout the pool as soon as possible.

Note that quicklime should not be mixed with human feces and urine or nitrogen fertilizer at the same time, otherwise available nitrogen will be greatly lost.