Identification of hymenopteran parasitoids of pollen beetles (Meligethes (Col. Nitidulidae)) on canola and preliminary investigation on their biology in Mazandaran province
2010
Barari, Hassan, Iranian Research Institute of Plant Protection | Seyed Ebrahimi,Seyed Rahim | Grami, Ghanbar | Keyhaneyan, Ali Akbar
Pollen beetles (Meligethes spp) are the most important oilseed rape pests in the world. Some hymenopteran parasitoid species, mostly belong to Ichneumonidae and Braconidae, are the effective biological control agents of these pests. In Iran, due to short history of oilseed rape growing, there is no scientific information about the occurrence and efficacy of the parasitoids on the pollen beetles. Because pollen beetles have feeding activity in the most oilseed rape fields of the Mazandaran province, this study was carried out in different area of the province, aiming to collect and identify of the pest parasitoids during 2008 and 2009. In order to obtain larval parasitoids, fieldcollected pollen beetles larvae were reared in corked tubes. The incidence of the parasitoids in the fields was assessed with yellow water traps and sweep netting. In total 1687 and 2200 pollen beetle larvae were reared in 2008 and 2009 respectively, but no parasitoid emerged. In addition, no parasitoid of pollen beetles was collected in yellow water traps and sweep netting.
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