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Fig. 1. Map showing distribution of cotton boll weevil in the United States.. 11 



2. Plan of experimental field, Travis County 16 



3. Plan of experimental field, Wharton County 18 



4. Plan of experiment showing damage resulting from favorable hilK-rnat- 



ing quarters 21 



5. Cotton boll weevil, adult 25 



6. Cotton boll weevil, larva and pupa 25 



7. Cotton square showing egg puncture 25 



8. Cotton square showing larva in position 26 



6 



189 



