FLOWEKS AND BOLLS OF PIMA AND ACALA COTTON 
21 
Table 13. — Mean age at time of shedding of the squares that appeared in 10-day 
intervals throughout the season of 1925 on the last node of all fruiting branches 
of two or more nodes and upon fruiting branches of one node only at the top of 
the main stalks of 20 plants each of Pima and Acala cotton 
Pima 
Acala 
10-day interval 
Last node only 
Branches of one 
node only 
Last node only 
Branches of one 
node only 
o 
a& 
Age at time 
of shedding 
(days) 
a& 
3 co 
Age at time 
of shedding 
(days) 
o 
eo 
S a 
S CO 
Age at time 
of shedding 
(days) 
o 
u <o 
P 
CO 
Age at time 
of shedding 
(days) 
June 8 to 17 
27 
14 
44 
80 
50 
62 
99 
10. 222±0. 804 
16.643±1.450 
19. 523± . 507 
18.525± .537 
17.320± .590 
17.597± .459 
17.899± .328 
June 18 to 27 
28 
71 
56 
68 
66 
36 
19.643±1.237 
28.394± .906 
27.036± .859 
24.250± .788 
24.439± .535 
18. 583± . 537 
June 28 to July 7 . 
July 8 to 17--. 
3 
5 
7 
10 
29. 00Q±1. 770 
July 18 to 27 
3 
24. 000±2. 861 
31.600±1.216 
July 28 to August 6__ 
25. 143±1.274 
August 7 to 16... 
13 
22.154± .786 
24.100± .877 
Table 14. — Mean age at time of shedding of the squares that appeared in 10-day 
intervals throughout the season of 1925 on the last node of all fruiting branches of 
two or more nodes and upon fruiting branches of one node only at the top of the 
vegetative limbs of 20 plants each of Pima and Acala cotton 
Pima 
Acala 
10-day interval 
Last node only 
Branches of one 
node only 
Last node only 
Branches of one 
node only 
o 
CO 
(h CD 
!3 CO 
Age at time 
of shedding 
(days) 
o 
u p 
3 co 
Age at time 
of shedding 
(days) 
o 
CO 
u p 
a& 
3 CO 
Age at time 
of shedding 
(days) 
o 
CO 
i« p 
cd s- 
a S. 
3^ 
Age at time 
of shedding 
(days) 
June 18 to 27 
22 
22 
33 
17 
16 
8 
19. 636±1. 167 
29.227±1.122 
30. 212±1. 189 
31.000±1.627 
24. 427±1. 433 
21. OOOdzl. 862 
6 
14 
14 
10 
4 
5 
15. 833±0. 403 
June 28 to July 7 
3 
20 
17 
9 
11 
17. 667±4. 293 
20. 600± . 739 
17.294± .854 
13. 333±1. 002 
17.273± .868 
26. 929±1. 556 
July8tol7 . --. 
40. 429±2. 716 
July 18 to 27- 
24. 500±3. 025 
July 28 to August 6 
August 7 to 16.- 
4 
5 
25. 750±2. 436 
22.400± .845 
30. 750±2. 561 
31.200± .510 
BOLL SHEDDING FROM SPECIFIC NODES OF FRUITING BRANCHES 
In connection with the shedding of squares from specific nodes of 
the fruiting branches of the two varieties, it was thought to be of 
interest to determine whether the percentage of boil shedding was 
different on the inner and outer nodes of these branches. Table 15 
gives the percentage of bolls shed from specific nodes of the fruiting 
branches on the main stalks and vegetative limbs of the 20 plants of 
Pima and of Acala for 1924 and 1925. 
When only a few flowers were produced on certain nodes, no per- 
centages for boll shedding from these nodes are given in this table. 
A progressive increase may be noted in the severity of boll shedding 
from the basal or inner nodes to those farther out on the fruiting 
branches, both on the main stalks and on the vegetative limbs of the 
two varieties and in both seasons. A higher degree of boll shedding 
occurred from branches of the vegetative limbs than from corre- 
