How to kill insects in large area aquaculture?

How to kill insects in large area aquaculture?

In recent years, the diseases of aquatic animals in lakes and reservoirs occur frequently, among which the incidence of parasite diseases and fish fulminant hemorrhagic disease is the highest, and fulminant hemorrhagic disease is mostly the secondary disease of parasitic diseases. therefore, the prevention and control of parasites is the key to prevent diseases in reservoirs and lakes, and the parasites are generally Anchor head mackerel, Chinese mackerel and ring worms. Ivermectin (1%) is generally used to control the disease of Anchor head, Chinese mackerel and finger ring, and the points for attention are as follows:

The main results are as follows: 1. Calculate the water solubility of the water body and the lake whose water depth is less than 2.5 meters, the dosage is "water surface x actual water depth x unit drug dosage": the reservoir with deeper water level should refer to some data: the reservoir capacity corresponding to the current water level and the current water level, the method is: [the reservoir capacity corresponding to the current water level-(current water level-2.5 m water level)] x unit drug consumption. The drug dosage calculated by the above method must also be adjusted according to the pH value and transparency of the water body.

2. Choose 8: 10 a.m. on a sunny day and apply the pesticide without floating head: it is best when there is no rain within three days.

3. The application of the drug should be as uniform as possible, and the more uniform the effect is, the more fishing boats and more manpower should be used to complete the application of the drug in a short period of time.

4. Choose to apply the pesticide when there is no wind or breeze, and when it is windy, there is little or no application within the distance of 10 to 15 meters from the shore in the leeward, especially in the shoals and bays in the leeward.

5. According to the depth and natural shape of the water area, the dosage is distributed in a reasonable way, so that the drug is applied evenly in all the water areas, avoiding that the drug is not used in place in some waters, and the therapeutic effect is reduced due to excessive use in some waters.

6. After the application, the motor boat is used to run back and forth several times along the application route in the water area, which can drive away the fish and mix the medicine well, so as to improve the effect of drug application.

Once parasites are found in large-scale aquaculture, it is appropriate to apply drugs sooner rather than later. Delayed treatment may further affect the feeding and growth of fish, and seriously may lead to fulminant hemorrhagic disease of fish. so that farmers suffer greater economic losses.