Abstract
The toxicity of deltamethrin, a synthetic pyrethroid insecticide, was determined under standardized conditions (ISO, 1982) in neonates and juveniles of Daphnia magna. Neonates (6 to 24 h old) were more sensitive than juveniles (48 to 72 h old). The 24- and 48-h EC50s (immobilization) in neonates were 0.113 and 0.031 µg l−1, respectively. The toxicity of deltamethrin was highly toxic. The 96-h EC50 was in the ppt (µg l−1) range. Toxicity tests with Daphnia may be used to detect toxic residues in water and sediment in areas treated with deltamethrin and other highly toxic pyrethroid pesticides.
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Xiu, R., Xu, Y. & Gao, S. Toxicity of the new pyrethroid insecticide, deltamethrin, to Daphnia magna . Hydrobiologia 188, 411–413 (1989). https://doi.org/10.1007/BF00027808
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DOI: https://doi.org/10.1007/BF00027808