Movement of <i>Ericaphis fimbriata</i> (Hemiptera: Aphididae) apterae on blueberry

Authors

  • W. G. van Herk Agriculture and Agri-Food Canada Pacific Agri-Food Research Centre P.O. Box 1000 Agassiz, BC VOM 1A0 phone: (604) 796-2221 ext. 234 fax: (604) 796-0359
  • D. A. Raworth Agriculture and Agri-Food Canada Pacific Agri-Food Research Centre P.O. Box 1000 Agassiz, BC VOM 1A0
  • S. L. Gillies Department of Biology University College of the Fraser Valley 33844 King Rd Abbotsford, BC V25 7M8

Keywords:

Ericaphis fimbriata, Blueberry scorch Virus, highbush blueberry, apterous aphids, coccinellids

Abstract

Blueberry scorch Virus is a new and important pathogen of blueberry in British Columbia, Canada of which the blueberry-infesting aphid Ericaphis fimbriata is a known Vector. In a study of the movement of apterous E. fimbriata, significantly more aphids fell when one ladybird beetle was added to E. fimbriata infested blueberry branches than when zero, two, or four were added. Similar numbers of aphids fell in the presence or absence of beetles at low aphid density (10-30 aphids per terminal), but more fell in the presence of beetles at high aphid density (50-70 aphids per terminal). The time taken for aphids to move a minimum distance of 60 cm off infested plants onto uninfested plants decreased with increasing aphid density which has important implications for the spread of the Virus.

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Vol. 103 (2006): Journal of the Entomological Society of British Columbia

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