Crayfish disease prevention technology
Since crayfish farming has just started, and there are fewer epidemics under extensive conditions, the time to study crayfish shrimp disease is also short. At present, many problems are still not fully understood, especially viral diseases are still not effectively treated. The treatment of shrimp disease should be based on the principle of “prevention first, prevention and treatment combinationâ€. a rotten disease The pathogen is a bacterial infection, and the symptoms are black and black, local mildew. Control method: Always know the residual bait and dirt in the shrimp pond, inject the salary, and keep the dissolved oxygen in the water body above 4ml/L to avoid the water pollution. It can be used for spraying with ***2g/m 3 dissolved water, which can achieve better therapeutic effect. Two rotten diseases It is caused by crayfish being injured, eating each other or being infected by chitinolytic bacteria. At the beginning of the infection, the tail of the diseased shrimp has blisters, edge ulceration, necrosis or incompleteness. As the disease progresses, the ulcer develops from the edge to the middle. When the infection is severe, the entire tail of the diseased shrimp festers and falls. Control method: When transporting and placing shrimp seedlings, do not pile up and damage the shrimp body. During the feeding period, the feed should be filled and evenly mixed to prevent the shrimp from competing for food or killing due to insufficient feed. When the disease occurs, use the tea simmer 15-20g/m 3 immersion liquid to splash the whole pool, or use the quick lime 5-6 kg/mu dissolved water to splash the whole pool. Three black rickets It is caused by serious water pollution, and the shrimp silk is caused by mold infection. The symptoms are that the sputum turns from red to brown or light brown until it is completely blackened, and the sputum shrinks. The sick shrimp tends to stay on the shore and eventually dies due to difficulty breathing. Control method: keep the water body clean, sufficient dissolved oxygen, and regularly adjust the water quality with quicklime. Sick shrimps are immersed 2-3 times with 3%-5% saline solution for 3-5 minutes each time, or sprayed with 10 ml/m3 of methylene blue. Web Usb Live Camera,Webcam Broadcast Video,Usb Webcam Broadcast Video,Usb Live Camera Shenzhen Zuomi Technology Co., Ltd. , https://www.zuomicamera.com