LIFE-TABLES FOR THE KOA SEEDWORM (LEPIDOPTERA, TORTRICIDAE) BASED ON DEGREE-DAY DEMOGRAPHY

The usefulness of demography performed on a degree-day scale is examin ed using laboratory studies on the koa seedworm, Cryptophelbia illepid a (Butler). By using degree-day accumulations in fecundity tables, we show that direct comparisons between time-sensitive parameters is poss ible and helps to determine sensitivity of the organism to temperature variations. Degree-day demography resulted in life table parameters t hat were similar between temperatures compared with variation when dem ographic parameters were based on calendar days.