CONTENTS 



Page. 



Entrance into hibernation .... 11 



Supply of weevils to enter hibernation .... II 



es entering hibernation l"> 



Time of entering hibernation L5 



Proportion of each sex among weevils in fall K'> 



Number of adult weevils entering hibernation 17 



Temporal ure conditions producing hibernation.. 20 



Shelter during hibernation 25 



Shelter in bolls 25 



Hibernation shelter other than bolls within (he Held 30 



Bibernation shelter outside of cotton fields 31 



Hibernation experiments in small cages 33 



Cage experiments of L902 :'. 34 



Cage experiments of L903 1 34 



experiments of 1904-5 3 1 



Bibernation experiments in -null cages, L905 6 35 



i -cage experiments, Keatchie, La., L905-6 38 



rable conditions for hibernal ton 41 



Effecl of acclimatization upon survival and emergence 42 



Relation of emergence to effective temperatures 43 



Relation of time of entrance into hibernation to survival and emergence. . 45 



The relationship of accumulated effective temperature to emergence 46 



Longevity of weevils after emergence in Keatchie experiments 48 



Large-cage experiments Dallas, Tex., 1905-G 49 



Nature of weevil activity following emergence from hibernal ion 50 



Climatic conditions producing emergence from hibernation a1 Dallas, Tex., 



in L906 52 



Emergence in the field at Victoria, Tex., in 190(5 52 



e experiments, L906-7, Dallas, Calvert, and Victoria, Tex 55 



Plan of experiments 55 



Climatic conditions producing hibernation and activity of weevils during 



normal hibernation period 57 



Entrance into hibernation 58 



Activity during normal period of hibernation 62 



Winter activity 64 



Activity as Bhown by development during normal hibernation period . 66 



Activity in the field during normal hibernation period 67 



• ■ from hibernation, H»(>7 67 



Relationship of emergence from hibernation to climatic conditions 68 



I of time of entering hibernation and nature of shelter npon the per 



centage of survival 74 



Sun ival of weevils by localities and cage sections 77 



Monthly summary of emergence recorde 79 



Weekly emergence records 79 



