Laboratory tests were performed to investigate the effects on Onychiurus armatus (Tullberg) and O. apuanicus Dallai of the herbicide atrazine at serial concentrations of 2.5 to 160 ppm. In O. apuanicus the lowest doses caused a mortality of 18.7 % after 30 days and 46.7% after 60 days. The 2 species showed different sensitivity to atrazine, especially at the higher doses. The LD50 after 30 days was 17.2 ppm for O. apuanicus and 20 ppm for O. armatus. Oviposition does not occur at 20 ppm or greater, whereas at lower doses no effects were found on reproduction.
Effects of atrazine on two species of Collembola (Onychiuridae) in laboratory tests / Mola, Lucrezia; Sabatini, Maria Agnese; Fratello, Bernardo; Bertolani, Roberto. - In: PEDOBIOLOGIA. - ISSN 0031-4056. - STAMPA. - 30:(1987), pp. 145-149.
Effects of atrazine on two species of Collembola (Onychiuridae) in laboratory tests.
MOLA, Lucrezia;SABATINI, Maria Agnese;FRATELLO, Bernardo;BERTOLANI, Roberto
1987
Abstract
Laboratory tests were performed to investigate the effects on Onychiurus armatus (Tullberg) and O. apuanicus Dallai of the herbicide atrazine at serial concentrations of 2.5 to 160 ppm. In O. apuanicus the lowest doses caused a mortality of 18.7 % after 30 days and 46.7% after 60 days. The 2 species showed different sensitivity to atrazine, especially at the higher doses. The LD50 after 30 days was 17.2 ppm for O. apuanicus and 20 ppm for O. armatus. Oviposition does not occur at 20 ppm or greater, whereas at lower doses no effects were found on reproduction.
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