Shift in dominance of two stem weevil species in oilseed rape in northern Serbia

The abundance of rape stem weevil, Ceutorhynchus napi Gyll., and cabbage stem weevil, C. pallidactylus Marsh., in northern Serbia vary considerably depending on the production season and locality. The damage these two species cause on oilseed rape depends on various factors, among which mostly on their abundance. The monitoring of these pests was conducted in northern Serbia, in the vicinity of Novi Sad, at Rimski Šančevi (N 45°19′51.03′′ E 19°50′07.16′′, 80 m a.s.l.) using yellow water traps (Moericke dishes). Chemical control against stem weevils was performed regularly at the monitored site. Assessments were done every seven days from the beginning of the year until May during three consecutive years, from 2016 to 2018