How To Control Animal Pests in undrained Fish Ponds

How To Control Animal Pests in undrained Fish Ponds

  1. If the fish pond cannot be completely drained, for example if it is undrainable or if there is no water available to refill it for the next production cycle, pests such as wild fish, frog eggs and tadpoles and snails should be controlled after harvesting the fish by treating the water left in the pond.
  2. In nursery ponds, voracious insects and even some zooplankters should also be destroyed before restocking.

READ ALSO: Key chemicals to prevent and cure fish diseases

Controlling pests by treating the water

  1. After harvesting your fish, proceed as follows to control the pests.

(a) Lower the water level as far as possible, keeping in mind that you will thereafter need water to refill the pond.

(b) Estimate the volume (in m3) of water present in the pond by multiplying its surface area (in m2 ) by its average depth (in m) Water,

(c) Treat the water with QUICKLIME ensuring that it completely mixes with the pond water. It should kill all fish, frog eggs and tadpoles, snails and most insects.

(d) After ten to 12 hours collect the dead fish with nets.

(e) Wait ten to 15 days for the organic poison to break down and disappear.

(f ) Stock a few fish, preferably keeping them in a submerged net or a small cage to be able to watch them carefully.

(g) If these test fish survive well and do not show any abnormal reactions, your pond is ready for stocking.

Note: Similar procedure is also used in addition to netting as a means of harvesting fish from undrainable ponds

 

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