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The temporal distribution of cyclamen mite, Phytonemus pallidus (Acari: Tarsonemidae), in strawberry and comparison of sampling methods

Published online by Cambridge University Press:  12 July 2022

Justin M. Renkema*
Affiliation:
London Research and Development Centre – Vineland Campus, Agriculture and Agri-Food Canada, 4902 Victoria Avenue North, Vineland Station, Ontario, L0R 2E0, Canada
Erica Pate
Affiliation:
Ontario Crops Research Centre – Simcoe, Ontario Ministry of Agriculture, Food and Rural Affairs, 1283 Blueline Road, Simcoe, Ontario, N3Y 4N5, Canada
Chrystel Olivier
Affiliation:
Saskatoon Research and Development Centre, Agriculture and Agri-Food Canada, 107 Science Place, Saskatoon, Saskatchewan, S7N 0X2, Canada
*
*Corresponding author. Email: justin.renkema@agr.gc.ca

Abstract

Cyclamen mite, Phytonemus pallidus (Banks) (Acari: Tarsonemidae), is a pest of strawberry, Fragaria × ananassa Duchesne (Rosaceae), that injures new growth, resulting in damage to leaves and fruit. The primary source of cyclamen mite in strawberry is infested planting material, and damaged plants tend to occur in small, isolated patches in perennial production systems. In the present study, we determined through repeated sampling of strawberry plants in Ontario and Saskatchewan, Canada whether relative cyclamen mite population levels were stable in commercial fields and whether overwintering and field renovation (mowing) affected populations. In Ontario, cyclamen mite counts were significantly correlated for 66% (10 of 15) of the paired comparisons from six sampling dates in more than one year, indicating a relatively stable distribution of cyclamen mite patches in strawberry fields. Winter caused high mortality (100 times fewer mites in spring than fall) and mowing caused some mortality (10 times fewer mites post- than pre-mow). We found that more cyclamen mite motiles were extracted from plant material stored in ethanol and triple-washed than were extracted using Berlese funnels, although counts from leaves were correlated between methods. No cyclamen mites were found in Saskatchewan. Knowing that cyclamen mite patches are local and spread is negligible will facilitate targeted applications of controls.

Information

Type
Research Paper
Copyright
© The Author(s), 2022 and Her Majesty, the Queen, in right of Canada, as represented by the Minister of Agriculture and Agri-Food Canada. Published by Cambridge University Press on behalf of the Entomological Society of Canada

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