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Toxicity of six novel fungicides and sulphur to Galendromus occidentalis (Acari: Phytoseiidae)

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Abstract

A laboratory evaluation of fenbuconazole, myclobutanil propiconazole, boscalid, fenhexamid and pyraclostrobin revealed these fungicides to be harmless to adult Galendromus occidentalis. None of these fungicides affected adversely fecundity and egg viability. Elemental sulphur also had no effect on adults and fecundity. However, 72.4% of the young larvae perished after hatching. The six novel fungicides are safer alternatives to sulphur in perennial crops in British Columbia.

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Acknowledgements

We thank the following trainees from Sherbrooke University: Eric Allard, Philippe Trudel, Guillaume Bastille-Rousseau, Josée Hamel, Bruno Proulx, as well as, Anouk Hebert and Dany Roy-Binette from the Federal Public Sector Youth Internship Program of Canada, for laboratory assistance. Hugh Philip from British Columbia Ministry of Agriculture, Food and Fisheries is thanked for the original collection of G. occidentalis in the Okanagan valley. The manufacturers of the fungicides are graciously thanked for the free samples of their products. Funding was provided in part by the Improved Farming Systems and Practices Initiative of the Pest Management Centre, Agriculture and Agri-Food Canada.

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Authors and Affiliations

  1. Horticulture Research and Development Centre, Agriculture and Agri-Food Canada, 430 Gouin Blvd., St. Jean-sur-Richelieu, QC, Canada, J3B 3E6

    Noubar J. Bostanian & Gaétan Racette

  2. Pacific Agri-Food Research Centre, Agriculture and Agri-Food Canada, 4200 Highway, 97 South, Summerland, BC, Canada, V0H 1Z0

    Howard M. A. Thistlewood

  3. Atlantic Food and Horticulture Research Centre, Agriculture and Agri-Food Canada, 32 Main Street, Kentville, NS, Canada, B4N 1J5

    John M. Hardman

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  1. Noubar J. Bostanian
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  2. Howard M. A. Thistlewood
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  3. John M. Hardman
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  4. Gaétan Racette
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Correspondence to Gaétan Racette.

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Bostanian, N.J., Thistlewood, H.M.A., Hardman, J.M. et al. Toxicity of six novel fungicides and sulphur to Galendromus occidentalis (Acari: Phytoseiidae). Exp Appl Acarol 47, 63–69 (2009). https://doi.org/10.1007/s10493-008-9191-5

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