(1) Symptoms:
The parasites attach to the fish's fins. Infected fish often rub their bodies against the pond bottom or gather in corners of the pond, and may die from complications due to physical weakness.
(2) Preventive Measures:
Add 100 kg of distiller's grains per mu (per meter of water depth) to the pond daily for five consecutive days.
(3) Treatment Methods:
Use a trichlorfon solution at a concentration of 0.5×10⁻⁶ mg/L to eliminate the parasites.
