POISONING COTTON-BOLL WEEVILS. 5 



picking in the poisoned and check plats, respectively, in this test. 

 In this case the cotton was so luxuriant that the dividing line could 

 not be shown in a single picture, but the two views given in these 

 illustrations were selected by a disinterested planter as being typical of 

 the two plats. Probably the most interesting feature of this test was 

 the fact that there were 22 days of rain during the month when the 

 applications were made. This seemed to indicate that successful 

 results could be secured from poisoning in spite of excessively rainy 

 weather and tended to allay the fear that dry weather would be 

 essential to successful results. 



Fig. 2. — Another view showing dividing line between poisoned and unpoisoned cotton on Algodon Cut 

 No. 1, October 30, 1916, Tallulah, La. View looking in opposite direction from that shown in figure 1. 



In another case a portion of a cut of new ground practically sur- 

 rounded by heavy timber was poisoned. This was very heavily 

 infested with weevils, but the poisoned plat yielded about 1,700 

 pounds of seed cotton per acre as compared with about 900 for the 

 check. The treatments in this case were practically confined to late 

 July. 



In all about 15 experiments were conducted during 1916, and the 

 total results showed definitely that it was possible to poison the 

 weevils profitably under certain conditions. Again, the increased 

 value of late-season applications was obvious, for, as a general rule, 

 the early-season applications gave only slight gains with a very 

 doubtful profit whereas the late-season applications all showed pro- 

 nounced profits. 



