Lygus lineolaris (Palisot), tarnished plant bug (Hemiptera: Miridae).

spp. overwinter as adults in refuges such as shelterbelts, which provide maximum winter protection (Cleveland, 1982; Craig and Loan, 1987; Gerber and Wise, 1995; Schwartz and Foottit, 1998). When they become active in spring they move to the fi rst plants in fl ower, generally weeds and volunteer crop plants, e.g. canola, where the females lay eggs. The fi rst generation develops on these plant hosts and new adults disperse to the next group of fl owering plants, which includes many agricultural crops. Depend-ing on climatic zone, from one to fi ve generations of