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. 

 2o 



FIG. 176. COTTON PLANT IN THE "BUDDING" 

 STAGE. 



Only at this stage can poison be used against the 

 boll-weevil. 



