Construction and comparison of life tables in population dynamic studies with laboratory cultures of the bollworm, Heliothis zea (Boddie)

I. Summary of The Number of Bollworm Larvae Pupating Daily in Each Cohort 28 II.Summary of The Number of Bollworm Adults Emerging Daily in Each Cohort 30 III.LifeTable in Notation Form 32 IV.Horizontal Life Table of The Distribution of Pupation Relative to Age in Days of Male Larvae .34 V. Horizontal Life Table of The Distribution of Pupation Relative to The Age in Days of Female Larvae 35 VI.Horizontal Life Table of The Distribution of Pupation Relative to The Age in Days of Male Plus Female Larvae (Tables IV and V Combined) 36 VII.Horizontal Life Table of The Distribution of Pupation Relative to The Age in Days of Ten Combined Cohorts of Larvae 37 VIII.Horizontal Life Table of Male Pupae Relative to The Distribution of Adult Emergence 38 IX.Horizontal Life Table of Female Pupae Relative to The Distribution of Adult Emergence 39 X. Horizontal Life Table of Male and Female Pupae Combined (Tables VIII and IX Combined) Relative to The Distribution of Adult Emergence 40 XI.Horizontal Life Table of Ten Combined Cohorts of Pupae Relative to The Distribution of Adult Emergence 41 XII.Horizontal Life Table of Larvae Relative to The Distribution of Death 42 XIII.Horizontal Life Table of Larvae Relative to The Distribution of Pupation Using Stadium As The Age Interval Page 44 46 48 50 51 52 53 54 55 LIST OF FIGURES Figure Page 1. Relationship of per cent predictability to closeness of means of two cohorts (A and B) of bollworm larvae 56 2. Relationship of per cent predictability to closeness of means of two cohorts (A and B) of bollworm pupae 57 vii