130 



In relation to^the general direction of the wind for each month, the 

 movement seemed to be eastward across the wind, which was blowing 

 from the south and southeast. 



A study of the tempei'ature conditions prevailing at 9 points, rang- 

 ing between Cameron and Shreveport, La., shows that during the 

 period of migratory movement the mean average temperature ranged 



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Fig 5. — Map showing successive weevil movements into Louisiana (original). 



between 75 and 84° F. The general outlines of the various movements 

 are shown and explained in figure 5. 



EFFECT OF DEFOLIATION UPON W^EEVIL MOVEMENT. 



During the past autumn special attention was given to this subject. 

 Fields under observation were stripped three or four times in numer- 

 ous cases by the cotton leaf worm Alabama argillacea Hbn. In such 



