IO8 KNAPP METHOD OF GROWING COTTON 



under favorable conditions, a living offspring 

 of two hundred and fifty thousand. 



The weevil feeds by sucking out the juices 

 from the inner portion of the plant, which makes 

 it impossible to use poisons effectively in its 

 control, as is done with insects which feed upon 

 the foliage of the plant. This renders the 

 weevil very difficult of control. 



The only way of combating the ravages of 

 this insect is by using all means possible to 

 hold the weevils in check and by practising 

 better cultural methods in producing the crop. 

 There are at present no known methods of 

 completely destroying the weevil, so it will 

 most likely be a factor in all future cotton pro- 

 duction in the United States. 



The Bureau of Entomology, U. S. Depart- 

 ment of Agriculture, has established the follow- 

 ing facts regarding the life history of the 

 weevil which are important in outlining methods 

 for its control: 



1. The cotton boll weevil feeds upon nothing 



but cotton. 



2. It goes into winter quarters mainly in 



or near the field of its depredations. 



