Abstract:
Me!a!euca cajuputi has been long used traditionally to treat ailments and its medicinal
properties are the important ingredient in producing Cajaput oil. It has been tested to
have anti-inflammatory and anti fungi properties and are vary potential in treating
aquatic organism. Aquaculturists have been switching to use herbal piscicides instead
of the synthetic piscicide which could pose hazard towards the cultured animal and
also human. Thus, in order to determine the toxicity of Me!a!euca cajuputi, acute
toxicity of Mela!euca cajuputi were done towards Lates calcarifer. The 96h LC50
obtained was 102.06mg/L. Fishes has been exposed to lower dosage of LC50 (20mg/1,
40mg/L and 60mg/L) for 96 hour. Minor oedema, hypertrophy and haemorrhage at
concentration 60mg/L were observed on the gill. The application of 40mg/L of
Me!a!euca cajuputi is recommended to be used as a treatment to cultured fish.
