Distribution and persistence of aminocarb in stream water, sediment and fish after application of three matacil®formulations

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Abstract
Three aminocarb formulations, water‐based Matacil® 180F, oil‐based Matacil® 180F and oil‐based Matacil® 180D, were applied separately to the surface of a stream at 2.40 g a.i./min for 5 minutes. The highest aminocarb concentration in the top 1 cm of water was found 5 min after application of oil‐based 180F (5000 ppb). The next highest concentration was 1862 ppb found in the top 1 cm layer of water 3 min after application of oil‐based 180D, followed by 1306 ppb found 5 min after application of water‐based 180F. Residue accumulations were first observed in sediment at 3 min and in fish tissues 0.5 h after application. The levels of accumulation were in the order of water‐based 180F > oil‐based 180F > oil‐based 180‐D. After the application of water‐based 180F, the highest concentrations were 20.2 ppb in sediment after 5 min and 127 ppb in fish tissues after 3 h. Residues disappeared rapidly from all three matrices and could not be detected after a period of 3–25 h.