Acute toxicity of benzalkonium chloride, copper chelate malachite green and treflan on Penaeus monodon (Fabricius) larvae
1989
Duangporn Vacharagasemsin
Acute toxicity of benzalkonium chloride, copper chelate, malachite green and treflan on Penaeus monodon (Fabricius) larvae were conducted by using the static bioassay. The 24-hour median lethal concentration (24-h LC50) of benzalkonium chloride on protozoa 2, mysis 2, post larva 5 and post larva 18 were 0.31, 0.41, 0.65 and 3.02 ppm respectively. The 24-h LC50 of copper chelate on protozoa 2, mysis 2, post larva 5 and post larva 18 were 0.20, 0.31, 1.48 and 7.24 ppm respectively. The 24-h LC50 of malachite green on protozoa 2, mysis 2, post larva 5 and post larva 18 were 0.14, 0.19, 0.32 and 1.15 ppm respectively. The 24-h LC50 of treflan on protozoa 2, mysis 2, post larva 5 and post larva 18 were 1.39, 2.74, 3.17 and 4.67 ppm respectivley. Safe concentrations of these chemicals and the effect on water quality during acute toxicity studies are also discussed
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