Abstract
Abstract Since the description of Ceutorhynchus subpubescens LeConte (Coleoptera: Curculionidae) >125 yr ago, very little information has been published on its biology, taxonomy, or distribution. We conducted studies in southern Alberta, Canada, to investigate aspects of its life history and host plant feeding preferences. Preimaginal life stages of C. subpubescens were described for the first time, and data were compiled on its North American distribution. Ceutorhynchus subpubescens was univoltine. Adults emerged from overwintering sites in shelterbelts in late April to early May, and first occurred on host plants in May. Eggs were laid into apical stem regions of flixweed, Descurainia sophia (L.) Webb (Brassicaceae), and hatched to larvae that mined the stems, feeding primarily on pith tissue. Three instars developed within D. sophia. When mature, the final instar bored an exit hole in the primary stem, just below the juncture of a lateral shoot. Developmental time from eggs to final instars required on...
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
