Monday, December 10, 2007
D0117

Chestnut weevil (Curculio sayi) flight ability and adult emergence

Ian W. Keesey, University of Missouri, 1-31 Agriculture BLDG, Columbia, MO and Bruce Barrett, BarrettB@missouri.edu, University of Missouri - Columbia, 1-31 Agriculture Building, Columbia, MO.

There were two major goals of this study: 1) examine the flight abilities of recently emerged adult chestnut weevil on a tether-based flight mill; and 2) determine the adult emergence patterns using modified pecan weevil traps. Female chestnut weevils were able to sustain a mean longer flight than males, although both sexes were shown to be capable of producing flight durations longer than one hour. Trends in emergence data indicate a biannual emergence pattern (peaking in May and August), with the largest emergence occurring around mid- to late September, which correlates with maximal nut production.


Species 1: Coleoptera Curculionidae Curculio sayi (lesser chestnut weevil)