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PubMed2003

Toxicity of leaf extract of yellow oleander Thevetia nerifolia on Tilapia.

The usefulness of leaf extract as an ideal source of 'piscicide' in shrimp farming is described Leaf toxins are safe, eco-friendly and biodegradable. The fish Tilapia, Oreochromis mossambicus was exposed to the extract and the percentage of mortality at the end of 24,48, 72 and 96 hrs was recorded. The respective toxic range of aqueous, alcohol and acetone extracts of 24 hr LC50 and 96 hr LC50 values were found to be respectively 1118.79-330.30, 699.24-129.02 and 749.95-347.23 mg dry extract/litre for Oreochromis mossambicus. The LC50 values observed in different time periods in the fish exposed to aqueous extract were relatively high compared to the values obtained in acetone and alcohol extracts. Use of leaf extract, as piscicide in aquaculture farms is considered advantageous when viewed against the backdrop of using persistent chemicals.

Animals↗