PHYSIOLOGICAL AND CHEMICAL ECOLOGY Laboratory Toxicity of Three Mosquito Oviposition Repellents to Six Nontarget Aquatic Invertebrates
نویسندگان
چکیده
Toxicity of three mosquito oviposition repellents, N,N-diethyl-3-methylbenzamide (AI3-22542 or deet), AI3-35765, and AI3-37220 to 6 aquatic nontarget invertebrates, was evaluated in the laboratory. The 24-h LC50 values for Cypricercus sp. (Ostracoda), Moina sp. (Cladocera), Eucyclops agilis Koch (Copepoda), Strelkovimermis spiculatus Poinar & Camino (Nematoda), Þrstand fourth-instar Toxorhynchites amboinensis Doleschall larvae (Diptera), and fourth-instar Chironomus decorus Johannsen larvae (Diptera) ranged from 0.012 to 0.127% or 120 to 1,270 ppm. Cypricercus sp., Moina sp., E. agilis, Þrst-instar Tx. amboinensis and fourth-instar C. decorus were generally more sensitive to the test repellents than male and female S. spiculatus and fourth-instar Tx. amboinensis. Male S. spiculatus was more sensitive to the repellents than its female and this was probablybecauseof the smallerbodysizeof themale.All invertebratesweregenerallymore sensitive to AI3-37220 than to deet and AI3-35765. The experimental repellents were considered safe to the aquatic nontarget organisms when employed as oviposition repellents for Aedes albopicus (Skuse) mosquitoes.
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