COTTON IN WEEVIL-CONTROL EXPERIMENTS 



13 



made in the west end of the May 12 planting because of the very poor 

 stand. 



Flower counts were started on June 26 and were made daily until 

 July 7. From that time until July 31 they were made every other 

 day. The counts from each section of row in each planting are given 

 in Table 9, with the total number of flowers counted each day in each 

 planting shown graphically in Figure 5. 



The total number of flowers counted on the west end of the rows 

 is usually smaller than the number on the east end. This was due 

 to retarded plant growth in the west end of the rows caused by 

 Johnson grass in that part of the field. 



SO 





3 S ? 9 // A3 /S /? AS 2 A 23 2S 2? 29 3/ 



Fig. 5.— Total number of flowers recorded daily from all sections of each cotton planting at San 



Antonio, Tex. 



The flowering of the April 19 and April 28 plantings was delayed 

 by the removal of early squares from the plants on June 12, as pre- 

 viously stated. Owing to this delay, the first flowers appeared at 

 about the same date in the plantings made on April 19, April 28, and 

 May 5. 



The plants in the April 19 and April 28 plantings were larger than 

 those in the May 5 planting, however, and produced more flowers 

 during the first half of the flowering period. During the period from 

 June 26 to July 13, inclusive, the total numbers of flowers counted 

 on the respective plantings were 1,966 on the planting of April 19, 

 as compared with 1,635 for the planting of April 28 and 1,539 for 

 that of May 5. Only 404 flowers were counted during the same 

 period on the two 50-foot rows of the May 12 planting. 



Although the early-planted cotton produced the largest number of 

 flowers during the first half of the flowering period, the first three 

 plantings peached the peak of flower production on the same day, 

 the largest number of flowers being recorded on July 13 in each of 



