The toxicity of four insecticides and a herbicide under tropical conditions
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Author
Welcomme, R.L.Date
1971
Metadata
Show full item recordAbstract
The toxicities of four insecticides and a herbicide to Tilapia macrochir were tested in the laboratory. The 24 hour LC50's were estimated as follows:Endrin 20% ,0.008 ppm; Lindane 5% granules, 4.6 ppmm; Synexa 50 (HCH) 50%), 5.6 ppm; Synex 25 (HCH 25%), 14.8 ppm; TOK herbicide (Nitrofen), 100% survival for 24 hours at 100 ppm. These estimates agree with results obtained by other workers elsewhere in the world. The laboratory determination of toxicity is important in estimating the direct effects of poisonous substances on fish, but other indirect effects may result from their use. These should be investigated in the field.Journal
African Journal of Tropical Hydrobiology and FisheriesVolume
1Issue/Article Nr
2Page Range
107-114