COTTON IN WEEVIL-CONTROL EXPERIMENTS 



15 



as many shed bolls undoubtedly were covered with soil when the 

 plants were cultivated and others were shed later in the season after 

 the records were obtained. 



Table 10 gives the number of shed bolls recorded from each section 

 of row in each planting during the period from June 30 to August 2. 

 These bolls were picked up every day from June 30 to July 7 and at 

 intervals of two or three days thereafter. 



Boll shedding started about July 1 in the first three plantings 

 and reached its peak on July 17. Although more bolls were shed 

 from the April 19 planting during the period from June 30 to 

 July 17, the larger numbers of bolls from the April 28 and May 5 

 plantings were shed during the latter part of July. This no doubt 

 was due to the larger proportion of late flowers produced by these 

 plantings. 



Table 10. — Numbers of shed bolls recorded from 50-foot sections of rows of cotton 

 grown in successive plantings at San Antonio during the period from June SO 

 to August 2, 1923 





Planted Apr. 19 



Planted Apr. 28 



Planted May 5 



Planted 

 May 12 



Date 



Block 1 



Block 2 



"3 



O 



Eh 



Block 1 



Block 2 



"3 

 o 

 Eh 



Block 1 



Block 2 



"3 



O 



Eh 



C3 



M 



o 

 3 



CD 



of 



M 

 o 



3 













CD 



S3 



IB 



c3 



» 



£ 





-t-3 



CD 



as 



CD 





CD 



+3 



"3 

 o 



Eh 



June 30 





 

 2 

 



2 



4 



3 



7 



15 



23 



42 



46 



86 



51 



42 



22 



24 



21 



22 



1 



3 



7 



3 



2 



2 



2 



7 



24 



61 



76 



106 



129 



117 



73 



33 



12 



24 



33 



4 

 1 

 1 



1 



6 



6 



5 



12 



31 



41 



67 



92 



107 



81 



52 



31 



34 



23 



22 



2 

 3 

 5 

 4 

 2 

 7 

 3 

 9 



27 

 35 

 61 

 65 

 96 

 96 

 90 

 26 

 17 

 24 

 28 



7 



7 



15 



8 



12 



19 



13 



35 



97 



160 



246 



309 



418 



345 



257 



112 



87 



92 



105 











1 



1 







4 



1 



8 



13 



21 



44 



49 



71 



67 



52 



29 



36 



25 



24 





 1 

 1 

 6 

 2 

 1 

 1 



17 

 34 

 56 

 80 

 97 

 149 

 136 

 89 

 44 

 27 

 28 

 26 







1 

 1 







3 







9 



6 



16 



17 



48 



44 



55 



39 



55 



35 



45 



32 



22 



1 

 1 

 3 



2 



8 

 13 



5 

 10 

 33 

 49 

 68 

 64 

 99 

 70 

 89 

 33 

 41 

 66 

 52 



1 



3 



6 



9 



13 



18 



16 



41 



96 



143 



240 



254 



374 



312 



285 



141 



149 



151 



124 











5 



1 



1 



3 



4 



9 



22 



19 



51 



48 



75 



78 



57 



35 



54 



50 



49 











6 



6 



5 



7 



4 



8 



30 



46 



51 



46 



108 



106 



78 



40 



39 



60 



55 







1 







5 



2 



7 



9 



17 



30 



49 



57 



63 



57 



49 



36 



40 



44 



35 







3 



4 



3 



5 



8 



5 



9 



18 



33 



36 



56 



86 



83 



75 



54 



68 



74 



63 







4 



17 



10 



16 



20 



20 



35 



87 



128 



187 



207 



332 



324 



259 



165 



201 



228 



202 







o 





 

 



1 

 1 



4 

 12 

 28 

 26 

 33 

 32 

 45 

 40 

 28 

 57 

 50 

 33 































2 



10 



21 



30 



30 



59 



46 



78 



32 



39 



55 



45 





 

 

 

 



1 

 1 



6 

 22 

 49 

 56 

 63 

 91 

 91 



118 

 60 

 96 



105 

 78 



July 1 



2 



3 



4 



5 



6 





9 



11 



13 



15 



17 



19.... 



23 



25 



27 



30 



Aug. 2 





Total 



412 



715 



617 



600 



2,344 



446 



795 



428 



707 



2,376 



561 



695 



503 



683 



2,442 



390 



447 



837 



For the period from June 30 to August 2 the total numbers of 

 shed bolls recorded from the April 19, April 28, and May 5 plantings 

 were 2,344, 2,376, and 2,442, respectively, while only 837 shed bolls 

 were recorded from the two 50-foot rows of the May 12 planting. 

 The smaller number of bolls shed from the May 12 planting is due 

 to the fact that fewer flower^ were produced. 



The fact that the numbers of flowers produced and the numbers 

 of bolls shed were nearly the same on each of the first three plantings 

 indicates that there was no significant difference in the proportion of 

 flowers produced and the extent of shedding during the period of 

 observation- it is probable, however, that more boll shedding would 

 bare been recorded on the later plantings if the counts had been 

 continued in August. 



