Biology of the black vine weevil <i>Otiorhynchus sulcatus</i> on hop in Idaho (Coleoptera: Curculionidae)

Authors

  • Craig R. Baird Panna Research and Extension Center University of Idaho Agricultural Experiment Station 29603 U of I Lane Parma, ID 83660
  • Keith W. Dorschner Panna Research and Extension Center University of Idaho Agricultural Experiment Station 29603 U of I Lane Parma, ID 83660
  • Carolyn J. Nyberg Panna Research and Extension Center University of Idaho Agricultural Experiment Station 29603 U of I Lane Parma, ID 83660

Abstract

The black vine weevil, Otiorhynchus sulcatus (Fabricius), is an important pest of hop, Humulus lupulus L., in Idaho. Although some adults survived winter conditions, O. sulcatus overwintered primarily as developing larvae associated with hop root systems 5-50 cm deep in the soil. Primary damage occurred as nearly mature larvae girdled small roots and rhizomes during spring feeding. Pupation began in mid-April with soil temperatures of 15-17°C and concluded in mid- to late May. Adult emergence began in early May and was complete by late May to early June during 1986-1988. The preoviposition period averaged 26 days in the field. The mean number of eggs laid per adult female was 290(22- 1230). Eggs hatched in 12-22 days at 21°C.

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Issue

Vol. 89 (1992): Journal of the Entomological Society of British Columbia

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Articles

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