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Non-omnia moriantur—toxicity of mancozeb on dead wood microarthropod fauna

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The effect of Dithane M-45 (dithiocarbamate fungicide; active substance: mancozeb) was studied on microarthropod fauna inhabiting dead wood. Although the exposure was almost never 100% lethal for the majority of observed taxa, almost all (Mesostigmata, Oribatida, some Uropodina, Actinedida, Collembola and Diplopoda) showed very high correlation between concentration of the fungicide and mortality (r > 0.86). Only Stigmaeidae showed low correlation (r = 0.293). For the majority of taxa LC50 values were close to the concentrations used during agrochemical activities in woods. Only Trachytes aegrota showed full susceptibility to the fungicide within the range of recommended field concentrations used in forestry (characterised by the low LC95 value). Tolerance of mesostigmatid and oribatid mites was found to differ between juveniles and adults, but not consistently. Related Uropodina species varied in susceptibility to the fungicide.

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The study was partially supported by Komitet Badan Naukowych project Nos. KBN 2 P04G 122 28. The authors are very grateful to prof. Helen Ghiradella, Dept Biological Sciences, SUNY at Albany (USA), for her valuable remarks, helpful suggestions, critical reading and linguistic correction of the manuscript. We also thank the two anonymous reviewers, for their valuable comments and suggestions.

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Correspondence to Zbigniew Adamski.

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Adamski, Z., Bloszyk, J., Bruin, J. et al. Non-omnia moriantur—toxicity of mancozeb on dead wood microarthropod fauna. Exp Appl Acarol 42, 47–53 (2007).

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