CONTROL OF BOLL WEEVIL IN MISSISSIPPI DELTA. 



29 



weevil was found, and on May 30, two weevils were found to 1,000 

 plants. On June 6 the plant examinations were separated by plats 

 and 50 plants were examined in each end and the center of each plat, 

 making a total of 150 plants to the plat. At this time only two weevils 

 were found, one in plat 1 and one in plat 3„ From these figures it is 

 seen that the emergence of weevils into these plats was exceedingly 

 light and late. However, by about June 12 a rather heavy general 

 emergence of weevils was taking place over the parish, and it was 

 considered advisable to begin picking these plats, in spite of the fact 

 that only a small number of weevils had been found in this cut. 

 Consequently, the first picking of all of the plats was made on June 

 13. At this time plat 2 yielded 10 weevils to the acre, plat 3 yielded 

 13, and plat 4 yielded 6. This is quite different from the first pick- 

 ing made three days later on Hecla plantation, when 129 weevils per 

 acre were collected, and shows the light initial infestation of this series 

 of plats. 



In order to determine the exact stage of the cotton plants at the 

 time of this first picking the squares were counted on 20 plants at 

 10 different points in the series of plats. These 200 plants averaged 

 7.5 squares per plant. A similar study of the plant heights showed 

 them to average 13.1 inches at this time. 



The labor involved in these pickings is shown in Table 24, figured 

 on the same basis as in the Hecla test. 



Table 24. — Labor required for picking weevils, Eureka -plantation, Tallulah, La., 1916, 



experiment No. 1. 



Plat No. 



Picking. 



Date. 



Labor 

 per acre. 



Cost of 

 labor per 

 acre, at 

 7| cents 

 per hour. 





fFirst 



June 13 

 June 20 

 June 27 

 July 5 

 July 11 

 July 22 



Hours. 

 6.4 

 5.5 

 6.0 

 9.0 

 15.0 

 10.0 



$0.48 







.41 





Third 



.45 





Fourth 



.68 



2 



{Fifth 



1.13 





Sixth 



.75 





Total 







51.9 

 8.6 



3.90 









.65 





fFirst 



June 13 

 June 17 

 June 20 

 June 23 

 June 27 

 June 30 







6.4 

 4.5 

 5.5 

 6.5 

 6.0 

 8.0 



.48 







.34 





Third 



.41 





Fourth 



.49 



3 



■, Fifth 



.45 





Sixth 



.60 





Total 







36.9 

 6.1 



2.77 





Average 





.46 





fFirst 



June 13 

 June 20 

 June 27 

 July 5 







6.4 

 5.5 

 6.0 

 9.0 



.48 







.41 





Third 



.45 



A.. 





.68 





Total 







26.9 

 6.7 



2.02 





Average 





.51 











