INDEX. 181 



Page. 



Boll weevil, percentage developed from infested squares 68 



plant control 132-136 



by structural characteristics 135-136 



possible annual progeny 76-77 



prospects. 27-29 



pupa, activity 67 



description 34 



duration of stage 67-68 



pupal cells 67 



pupation 67 



relation to top crop of cotton 81-83 



repression 147-163 



at gins 152-153, 161-162 



basis 155-160 



by arsenate of lead 150-151 



burial of squares 147-149 



chain cultivator 151 



destruction of cotton stalks 160 



weevils during winter. : 160 



early crop of cotton 160-161 



encouraging insect enemies 161 



fumigation of cotton seed 162-163 



hand-picking of weevils and squares 161 



increasing effects of climatic conditions 161 



insecticides 149-151 



legal restrictions 164-168 



machinery 151-153 



quarantine 160 



stalk destruction 157-158 



futile methods 153-155 



futility of attempting to restrict cotton production 156-157 



castor bean plant 155 



cottonseed oil 153 



mineral paint 153 



Paris green 154 



pepper plants 155 



spraying 153 



sulphur 153 



tobacco 155 



trapping at lights 154 



requirements of satisfactory method 155 



summary of means 160-162 



seasonal abundance 74-85 



sexes, seasonal proportion 51-52 



sex of hibernated boll weevils 51-52 



individuals ready to enter hibernation , 51 



spring and summer boll weevils 51 



sexual attraction 52 



sporadic occurrences, unexplained 94 



spread. (See Boll weevil, dissemination.) 



spring search for cotton 85-86 



spread within field 86 



status examinations 80-81 



summary of life history 32-33 



repressive measures 160-162 



summer flights 86-87 



temperature relationships 125-131 



variations fatal 129-131 



zones 125-128 



Bollworm. (See Heliothis obsoleta.) 

 Bracon mellitor . (See Microbracon mellitor .) 



Bruchophagus herrerse, enemy of boll weevil 141 



Buildings as hibernation shelter for boll weevil 102 



Bunting, painted. (See PasserVna ciris.) 



Burial of squares, effect on boll weevil 147-149 



