Preparation of bait for fish

The treatment and prevention of fish disease is generally used to sprinkle medicine in the pond and mix the medicine in the feed for feeding, which is what we usually call oral method. The key to the effect of oral treatment and prevention of fish disease lies in the preparation of bait. The preparation methods and matters needing attention of several baits commonly used in production practice are introduced as follows:

I. preparation methods of several baits

1. Preparation of pellet feed bait: calculate the required feed and medicine, spread the feed evenly on the plastic film (thickness should be uniform, not too thick), thoroughly dissolve the drug, pour it into the sprayer and dilute it with water. Spray the medicine evenly on the feed with a sprayer at intervals of 5 to 10 minutes. Turn the feed over and spray it again for 2 to 3 consecutive times until the drug is sprayed evenly on the feed. Finally, it is dried and bagged for use.

two。 Preparation of floating bait: the feed for this bait is usually rice bran or wheat bran, and the adhesive is elm powder, sweet potato powder or flour. Calculate the required medicine and feed, mix them evenly with the adhesive, and add the right amount of hot water to mix. Make blocks, strips or particles with moderate hardness and softness as needed. Dry, bagged, ready for use.

3. Preparation of sinking bait: the feed for preparing this bait is usually vegetable cake or bean cake, and the adhesive and preparation method is the same as that of floating bait.

4. Preparation of green feed bait: cut green feed into 3-5cm segments, mix the necessary medicine with an appropriate amount of adhesive (elm powder, sweet potato powder or flour) into a paste, mix well with the cut green feed, dry and feed.

II. Points for attention

1. To accurately estimate the feeding amount of the bait, it is generally used now, and it is necessary to prevent the bait from mildew.

two。 The feed for preparing the bait must choose what the fish like best and can be ground into powder (except pellet feed). The buoyancy and sedimentation of the bait are similar to the feeding habits of the fish. For example, grass carp use floating rice bran or bran, carp and crucian carp use sinking vegetable cake or bean cake.

3. The viscosity of the adhesive should be moderate, the viscosity is not enough, the bait is lost after meeting the water, which affects the efficacy; but it should not be too sticky, so as not to affect the absorption of fish. The commonly used adhesives are elm powder, sweet potato powder, potato powder, flour and so on, and elm powder is the best. Generally, 300 grams of elm powder are added per kilogram of rice bran and 200 grams of elm powder are added per kilogram of vegetable cake.

4. If it is not a granular material, it is best to process the bait into particles that match the size of the fish. When feeding bait, generally stop eating for one day, the amount of feeding should be 20% less than usual, 30% less than usual for 6 days as a course of treatment.