Identification of parasitoids of Athalia rosae and evaluation of parasitism percent in Kurdistan province
Subject Areas :
Keywords: Canola, Kurdistan, parasitoid, parasitism, Athalia rosae, turnip sawfly,
Abstract :
Outbreak of the turnip sawfly Athalia rosae, caused severe damages to many Canola fields in Marivan region in 2002. Concerning the importance of this pest, a survey was conducted during 2007- 2008 on the associated parasitoids. Eggs and different stages of larvae of turnip sawfly were collected and were reared in laboratory conditions until emergence of the parasitoids. The rate of parasitism was also counted based on the number of emerged parasitoids. No parasitoid was associated with eggs of A. rosae, however one species of perilampid wasps (Perilampus aeneus Rossi) with less than 1% parasitism rate and two species of tachinid fly (Exorista mimula Meigenand Meigenia mutabilis Fallen) emerged from collected larvae. Parasitism rate of tachinid flies was ranged between 12 to 28 % that was often on old larval stages. E. mimula was the most emerged flies from larvae with 84.4% whereas M. mutabilis was 15.2% only.
