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| Toxicity and Risk of Different Formulations of Dinotefuran to Three Crustaceans |
| Received:May 25, 2015 |
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| KeyWord:dinotefuran;technical material;formulation;crustacean;acute toxicity;risk assessment |
| Author Name | Affiliation | E-mail | | ZHANG Wen-ping | Institute of Pesticide and Environmental Toxicology, Zhejiang University, Hangzhou 310029, China | | | WANG Quan-sheng | Institute of Pesticide and Environmental Toxicology, Zhejiang University, Hangzhou 310029, China | | | XU Ji-yang | Institute of Pesticide and Environmental Toxicology, Zhejiang University, Hangzhou 310029, China | | | ZHU Guo-nian | Institute of Pesticide and Environmental Toxicology, Zhejiang University, Hangzhou 310029, China | | | LI Shao-nan | Institute of Pesticide and Environmental Toxicology, Zhejiang University, Hangzhou 310029, China | snli@zju.edu.cn |
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| Abstract: |
| Dinotefuran, a furanicotinyl insecticide in the third generation of neonicotinoids, is soluble in water, thus may causing toxicity to aquatic life. A static method was employed to assess the acute toxicity of technical material(TM) of dinotefuran and its two formulations, i. e. 20% soluble powder(SP) and 1% granules(G), to Daphnia magna, Simocephalus vetulus and Eucyclops serrulatus. Based on measured concentrations, the 48 h-LC50 of TM, SP and G of dinotefuran was 1.08, 22.96 mg·L-1 and 0.36 mg·L-1 for Daphnia magna, 1.21, 10.65, 0.40 mg·L-1 for Simocephalus vetulus, and 0.08, 0.04 and 0.04 mg·L-1 for Eucyclops serrulatus, respectively. Compared with TM of dinotefuran, the acute toxicity of 1% G to Daphnia magna and Simocephalus vetulus was greater, while 20% SP was less. Both formulations had similar acute toxicity to Eucyclops serrulatus, which was slightly higher than that of TM. Furthermore, GENEEC model was used to assess the acute risk of both formulations. The risk quotients(RQ) of 1% G and 20% SP, calculated by dividing the estimated environmental concentrations(EECs) by LC50 were 0.070, 0.063, and 0.63 and 0.000 54, 0.001 2 and 0.31 for Daphnia magna, Simocephalus vetulus, and Eucyclops serrulatus, respectively, indicating that from species point of view both of the two formulations had high risk to the Eucyclops serrulatus but they had no risk to the other two species, and from the point of formulation the acute risk of 1% G was higher than that of 20% SP. |
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