COTTON INSECTS 



401 



(Fig. 176) . While it kills most of the weevils then present, 

 other weevils continue to come from their winter quarters 

 for several weeks 

 after the forma- 

 tion of squares 

 begins. The use 

 of any kind of 

 poison after 

 squares appear 

 is ineffective. 



Where the boll- 

 weevil is present, 

 the space be- 

 tween cotton 

 rows should be 

 increased so that 

 the sunshine may- 

 more rapidly dry 

 and destroy the 

 fallen squares 

 with the larvae 

 contained in 

 them. A culti- 

 vator which col- 

 lects the squares in the "middle" where there is most 

 sunlight, is shown in Fig. 177. 



For at least a few weeks after the appearance of the 

 weevils, and while there are but few in the fields, it is ad- 

 vantageous, where practicable, to pick the infested squares 

 from the ground and from the plant. These should be 

 burned, or else treated as shown in paragraph 371. 

 2d 



Fig. 176.- 



- Cotton Plant in the 

 Stage. 



' BXTDDING ' 



Only at this stage can poison be used against the 

 boll-weevil. 



