Published online by Cambridge University Press: 31 May 2012
The wheat stem sawfly (Cephus cinctus Nort.) has recently become established as a serious pest of wheat in the Nobleford—Lethbridge area of southern Alberta, the first appreciable damage to wheat occurring in 1934. Each succeeding year the insect has increased and spread rapidly throughout the area, and in many cases crop losses have run as high as 75 to 80 per cent.
1 Memoirs and Proceedings of the Manchester Literary and Philosophical Society, Vol. 50, Pt. III, 1906, p. 5.