How to use medicine for breeding eel in summer and autumn

In the high temperature season in summer and autumn, eel grows most vigorously, but the incidence of eel is also the highest. When the eel fell ill, many farmers "rushed to the doctor" and used medicine indiscriminately. As a result, they spent a lot of money wrongly, and the disease of the eel was not cured. Even, drug abuse causes water pollution, and some eels do not die of disease, but are poisoned by drug abuse. Therefore, the scientific selection of fish medicine is the key to the effective prevention and treatment of eel diseases.

Nowadays, there are many kinds of drugs, and all kinds of new drugs emerge in endlessly. However, the drug selection principle of high efficiency, quick effect, long effect, safety, low toxicity, little side effect, no residue, convenience and low price is the general trend of drug use. How to choose fishery medicine correctly? How to use fish medicine reasonably? The author puts forward some humble suggestions for your reference:

1. We should adhere to the policy of "comprehensive prevention and active treatment" and establish the concept of "giving priority to prevention and giving priority to prevention than treatment." Treatment is only used as a last resort, there are many fish diseases, difficult to treat, but prevention is very effective, such as eel water mildew, melon disease and so on. Even if these diseases are cured, it is difficult to sell them because the fish is ugly and deformed.

two。 In the prevention and control of eel diseases, we should try our best to use fish medicine with high efficiency, low toxicity and low residue, and advocate the use of biological fish medicine, biological products and Chinese herbal medicine. These drugs are safe, less toxic, have no residues, and are unique in prevention and treatment.

3. When fish disease occurs, it should be diagnosed correctly and prescribe the right medicine to prevent abuse and blindly increase the dosage or increase the frequency of drug use and prolong the time of drug use. Malachite green, pyrethroids and methamidophos (carcinogenic, teratogenic and mutagenic) pesticides (carcinogenic, teratogenic and mutagenic) should be carefully used and prohibited. In particular, drugs and additives prohibited by the state shall not be used.

4. Do not rely solely on experience, do not believe in science, or follow the medicine blindly, and you have no independent opinions. Farmers are most concerned about material benefits and practice, but can not blindly apply the experience of others, the specific circumstances of each pond are different, follow other people's oxtail, indiscriminately administer drugs, and ignore the differences of specific water conditions and fish conditions under different conditions in the process of actual drug use.

5. It is necessary to have the correct method of drug administration and master the correct time of drug administration. Whether it is the whole pond sprinkling disinfection method, medicine bath method, oral method or smearing method, it is necessary to choose the most effective drug administration method. Sometimes the medicine is only sprayed around the pond, and sometimes it is used on one side or corner of the pond, so pay attention to your choice. In the choice of medication time should be appropriate: fish floating head can not be used in the morning, rainy and cloudy days can not be used medicine, water hypoxia at night is not convenient to operate, not easy to observe, easy to produce fish hypoxia and poisoning accidents, not suitable for drug use; it is not appropriate to use medicine immediately after feeding.

6. Determine the correct dosage according to water condition, fish condition and weather. Too small to achieve the purpose of treatment, too large to lead to fish poisoning and even death. All eels have a sensitivity to drugs. Take the eel pond with a water temperature of 22 ℃, pH value of 7 jin and a depth of 1 meter per mu as an example: trichlorfon, an appropriate amount of 6: 8 taels, a maximum of 1 jin; quicklime, an appropriate amount of 30 kg 40 jin, a maximum of 60 jin; bleaching powder of 1.6 jin, a maximum of 2.5 jin; potassium permanganate, a maximum of 7 jin; and Xingmianbao, a half-tael amount of Xingmianbao, a maximum of 1 jin. Only by mastering the lethal concentration of these drugs can we take therapeutic measures safely, reasonably and effectively.

7. Attention should be paid to the incompatibility and use of drugs. For example, trichlorfon, copper sulfate, bleaching powder and quicklime cannot be mixed; table salt cannot be mixed with quicklime and bleaching powder; turbidity and precipitation of the two drugs can not be mixed; potassium permanganate can only be used in neutral water, if used in acidic or alkaline water, it will produce manganese dioxide precipitation, damage eel Gill, promote Gill rot or even death; Chinese and western medicine should not be mixed. Drugs that are sensitive to sunlight should be used in the dark or in the evening to ensure their efficacy.

8. There should be a withdrawal period for edible fish before they are put on the market. To ensure that drug residues in listed aquatic products meet the relevant requirements.