Methods of drug prevention in epidemic season of fish disease

The occurrence of fish disease has a certain seasonality. Many fish diseases often occur from April to October, among which April-June and August-October are the two main epidemic seasons of the year. Targeted and timely drug prevention before the epidemic season of fish disease is an effective measure to supplement the lack of prevention, which can prevent the disease and get twice the result with half the effort.

The prevention of body surface fish disease can be prevented by the following drugs:

1. According to the water depth of 33 cm per mu of water, the trichlorfon was sprinkled in the whole pool with 90% crystal trichlorfon 50-100g or 2.5% trichlorfon powder 250g-500g plus water, which has a killing effect on the larvae of trichlorfon, third-generation worms, Chinese oysters, water centipedes and anchor heads. If 50 grams of ferrous sulfate are added per mu of water surface per 33 cm water depth, the prevention effect of grass and silver carp disease can be improved.

2. Quicklime is used at the depth of 33cm per mu of water with 3.5MUR 5.0kg of quicklime. After hydration, the whole pool is sprinkled with quicklime. It can prevent and treat myxobacteria rotten Gill disease, white head and white mouth disease, and dinoflagellate disease, and can improve water quality.

3. Bleach is used 0.25 kg per mu of water per 33 cm water depth from half a month to one month, and sprinkled in the whole pool after dissolving with water, which is effective in preventing bacterial diseases.

4. The mixture of copper sulfate and ferrous sulfate sprinkled in the whole pool with the mixture of copper sulfate and ferrous sulfate of 0.7ppm (the ratio of the two is 5:2) every month can prevent parasitic fish disease, rotifer disease, Gill cryptotrichiasis, oral filariasis, oblique tube disease and Chinese oyster disease.

The above drugs must be fully dissolved, sprinkled evenly, and the residue should be disposed of properly.