Trichlorfon (Neguvon) for Fish: A Comprehensive Guide

Trichlorfon (Neguvon) for Fish: A Comprehensive Guide

Trichlorfon (Neguvon) for Fish


Trichlorfon is a widely used pesticide in the aquaculture industry for controlling parasites and diseases in fish. It is a chemical compound that belongs to the organophosphate group, and its use has been approved by various regulatory bodies worldwide. While trichlorfon can be an effective treatment for fish parasites and diseases, it is important to use it correctly and responsibly to avoid harm to both the fish and the environment. This article aims to provide a comprehensive guide on the use of trichlorfon for fish, including its benefits, risks, and proper application methods.

Benefits of Trichlorfon for Fish:

Trichlorfon has several benefits when used properly in aquaculture. These benefits include:

  1. Effective parasite control: Trichlorfon is an effective treatment for parasites such as flukes, lice, and anchor worms in fish.
  2. Rapid action: Trichlorfon acts quickly, providing relief to fish suffering from parasites and diseases.
  3. Affordable: Trichlorfon is relatively inexpensive compared to other treatments for fish parasites and diseases.
  4. Approved by regulatory bodies: Trichlorfon has been approved for use by various regulatory bodies worldwide, including the US Environmental Protection Agency (EPA) and the European Union.

Risks and Precautions:

While trichlorfon has benefits, it is important to use it with caution to avoid harm to fish and the environment. Risks and precautions include:

  1. Toxicity: Trichlorfon is toxic to fish at high concentrations. Careful dosage and application are necessary to avoid toxicity.
  2. Harmful to the environment: Trichlorfon can be harmful to the environment, especially aquatic ecosystems. Avoid applying trichlorfon near water bodies or in areas where runoff can contaminate water.
  3. Residue concerns: Trichlorfon residues can remain in fish tissue, which can be a concern for human consumption. It is important to follow the prescribed withdrawal period before consuming fish treated with trichlorfon.
  4. Safety precautions: Always follow safety precautions when handling trichlorfon, including wearing protective clothing and gloves.

Proper Application of Trichlorfon for Fish:

Proper application of trichlorfon is critical to avoid harm to fish and the environment. Here are some guidelines to follow when using trichlorfon for fish:

  1. Determine the correct dosage based on the weight of the fish and the severity of the infestation.
  2. Dilute the trichlorfon in water according to the instructions on the label.
  3. Administer the trichlorfon solution to the fish by immersion, bath, or direct application, depending on the type of parasite or disease being treated.
  4. Monitor the fish closely during and after treatment to ensure that they are not experiencing any adverse effects.


Q: Is trichlorfon safe for all types of fish?

A: Trichlorfon is generally safe for most types of fish when used correctly. However, some species may be more sensitive to trichlorfon than others, and it is important to consult with a veterinarian or aquaculture expert before using trichlorfon.

Q: Can trichlorfon be used to treat fish diseases other than parasites?

A: Trichlorfon is primarily used to treat parasites in fish. However, it may also be effective in treating certain bacterial and fungal infections. Always consult with a veterinarian or aquaculture expert before using trichlorfon

Irosh Akalanka

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