Title: Comparison of the Toxicity and the Influence of Enzyme Activity of Four Kinds of Insecticides to Daphnia magna
Abstract: The toxicity of four kinds of insecticides (7504, trichlorphon, sevin, deltamethrin) to Daphnia magna can be determined with the method of biological toxicity and the method of biochemical toxicity. Of four insecticides, deltamethrin has the most efficient toxicity to Daphnia magna, its 24 h LC 50 being 0.385 μg/L. Next is trichlorphon, 24 h LC 50 being 0.74 μg/L. Third is sevin, 24 h LC 50 being 18.6 μg/L. The last is 7504 and its 24 h LC 50 being 303.7 μg/L. According to the results of the method of biological toxicity, we culture Daphnia magna in culture solutions added with insecticides (LC 0 and LC 50 ) separately and determine important enzyme's activity and K m (AChE, Carboxylesteraes and so on). The results show: different insecticides can affect the enzymes differently, and the method of biochemical toxicity is more sensitive and more accurate than the method of biological toxicity.
Publication Year: 1997
Publication Date: 1997-01-01
Language: en
Type: article
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Cited By Count: 3
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