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- W2016908963 abstract "Abstract Over a 2‐year period, three research facilities examined a semi‐field testing procedure to determine its usefulness in predicting potential side‐effects of pesticides on non‐target leaf‐dwelling insects under field exposure conditions. The ladybird beetle Coccinella septempunctata was chosen as an indicator species for such insects. The objectives of the research were to examine the amenability of the testing method and to evaluate the reproducibility and reliability of the results. Second instar larvae of the beetles were placed on aphid‐infested broad bean plants and then exposed to a spray treatment with one of three insecticide formulations at different application rates. The pesticides used were ME 605 Spritzpulver (WP 40), Metasystox R (EC 250) and Pirimor Granulat (50% a.i. w/w). Larval mortalities and numbers of successful metamorphoses observed in the tests were found to be in good agreement with observations made under agricultural field conditions. The reproductive performance of beetles which developed from the exposed larvae was highly variable between replicate groups although beetles were partly maintained in groups of comparable parent density and sex ratio. Overall, it is concluded that the proposed test procedure is amenable and that the observed effects on larval survivability and the number of successful metamorphoses can be used to reliably predict harmful effects of pesticides to ladybird beetles in the field. If used as testing endpoint, the reproductive performance should only be qualitatively evaluated, since this sublethal endpoint is apparently subjected to a high natural variability." @default.
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- W2016908963 date "1997-01-12" @default.
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- W2016908963 title "A semi‐field testing procedure using the ladybird beetle, <i>Coccinella septempunctata</i> L. (Col., Coccinellidae), for assessing the effects of pesticides on non‐target leaf‐dwelling insects under field exposure conditions" @default.
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- W2016908963 doi "https://doi.org/10.1111/j.1439-0418.1997.tb01380.x" @default.
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