Host‐associated differentiation in reproductive behaviour of cecidomyiid midges on cranberry and blueberry

摘要: In British Columbia, Canada, Dasineura oxycoccana Johnson (Diptera: Cecidomyiidae) was initially found on highbush blueberry, Vaccinium corymbosum L. (Ericaceae) and has recently become a pest of cranberry, macrocarpon Aiton, crop that is often in close proximity with blueberry. Previous work shown no temporal isolation potential for gene flow between these two D. populations. However, important behavioural differences were observed suggesting the host races or cryptic species. Host species differ their degree assortative mating reproductive from partial to complete. We assessed whether populations adult crops would discriminate against mates different natal hosts. Mating experiments conducted within greenhouse 2010 using small glass vials without plants present. Our results show cranberry blueberry hosts displayed complete absence plants. Behavioural data collected crosses suggest sex pheromones close-range ‘courtship pheromones’. conclude Columbia are reproductively isolated probably represent