Toxicity of the systemic insecticide, imidacloprid, to forest stream insects and microbial communities.

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Kreutzweiser DP, Good KP, Chartrand DT, Scarr TA, Thompson DG

Toxicity of the systemic insecticide, imidacloprid, to forest stream insects and microbial communities.

Bull Environ Contam Toxicol. 2008 Mar;80(3):211-4. doi: 10.1007/s00128-007-9347-8. Epub 2008 Jan 9.

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18188485 [ View in PubMed
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Abstract

Imidacloprid was added to laboratory aquatic microcosms at concentrations of 12, 24, 48 and 96 microg/L to determine effects on leaf-shredding aquatic insect survival and feeding rates, and on aquatic microbial decomposition of leaf material. Survival of the stonefly, Pteronarcys dorsata, was significantly reduced at 48 and 96 microg/L. There was no significant mortality of the cranefly, Tipula sp., but most surviving tipulids were very sluggish and non-responsive to prodding at 48 and 96 microg/L. Leaf decomposition by these leaf-shredding insects was significantly reduced at all test concentrations. There were no significant adverse effects on microbial decomposition of leaf material.

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