Submitted to: Entomological Society of America Annual Meeting North Central Branch
Publication Type: Abstract Only
Publication Acceptance Date: March 2, 2003
Publication Date: March 2, 2003
Citation: FRENCH, B.W. ADULT MOVEMENT WITHIN AN AREAWIDE SITE. ENTOMOLOGICAL SOCIETY OF AMERICA ANNUAL MEETING NORTH CENTRAL BRANCH. 2003. Paper No. 178. Technical Abstract: Dispersal is a means by which gene flow occurs among populations. I report on northern corn rootworm (NCR) dispersal in relation to sex, size and reproductive status in the SD areawide management site. I used emergence cages and sticky traps to capture (NCR) within cornfields, and sticky traps to capture NCR between soybean and cornfields. Male NCR had larger head capsule sizes than females from all traps. For males and females captured between fields, more beetles were captured in the lowest, middle, then highest traps. Sperm was found in the spermatheca in most NCR females. In addition, most NCR females captured had no eggs or had un-chorionated eggs. More male NCR were captured above the corn canopy than were females, and for both female and male NCR, most were captured emigrating from the cornfields. Females with spermatophores occurred at a higher frequency earlier in the season, but a low proportion of females contained spermatophores throughout the season.