Ref ID : 6067
Doris Ebert; Differences in uptake of bound residues of bentazon, a herbicide, by two different earthworm species, Eisenia foetida (Sav.) and Lumbricus rubellus (Hoffm.). Soil Biol.Biochem. 24(12):1715-1718, 1992
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To investigate the possible influence of earthworms on bentazon residues in soils it is necessary to determine whether these residues are taken up at all by worm tissues. Therefore the amount and distribution of radioactivity in different tissues of the earthworm species Eisenia foetida and Lumbricus rubellus were measured, after culturing them in two soil types containing extractable and bound residues of the [14C]-labelled herbicide bentazon. The results show that only in one soil type L. rubellus take up much more radioactivity in its intestine than E. foetida. In the other soil substrate this clear difference between the two earthworm species is lacking. Since metabolite composition of the soil methanol exracts is different in the two soil types it can be concluded that L. rubellus uses one or several radioactive bentazon residue components in another way than E. foetida.