Molecular structure and acute toxicity of different insecticides to three marine fish species | ||
| Journal of Pest Control and Environmental Sciences | ||
| Volume 7, Issue 2, June 1999, Pages 19-30 PDF (2.7 M) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/jpces.1999.462100 | ||
| Author | ||
| Ali A. H. Elsebae* | ||
| Dept. of Environment Sciences, Faculty of Environ. Agric. Sciences, Suez Canal Univ. Alareesh, North Sinai | ||
| Abstract | ||
| Ten insecticides representing the more widely used compounds during the last twenty years were selected for studying their acute toxicity hazard to the three marine fish species: Dicentrarchus labrex (sea bass); Sparus auratus (sea bream); and Solea vulgaris. The 96 hr LC50 values revealed a wide variation in susceptibility of the three marine fish species. Dicentrarchus labrex (sea bass) was the most sensitive followed by Sparus auratus and Solea vulgaris in a descending order. The ten insecticides include four synthetic pyrethroids, four organophosphorous compounds and two oxime carbamates. The wide range variation in the molecular weight (e.g. 3 fold between methomyl and deltamethrin), required molecular correction by converting LC50 to molar LC50 to give equal chances for comparing molecular toxicity. Molecular correction changed the magnitude of relative acute toxicity hazard for some compounds. Permethrin was the most hazardous compound, followed by deltamethrin, and triazophos for the three fish species. This correction will be helpful for more precise structure activity relationships. The hazards of tested insecticides to the highly sensitive sea bass, indicates the importance of including fish toxicity data in the registration of pesticides. | ||
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