COTTON IN WEEVIL-CONTROL EXPERIMENTS 35 
and unstripped plants in the first three plantings shows that the 
stripped plants grew larger than those not stripped, the increases are 
hardly significant. 
TaBLE 23.—Average height of stripped and of unstripped cotton plants grown in 
successive plantings at Charleston on four different dates in 1923 
Average height on date given (centimeters) 
Planting date and ° Growth 
condition June | June | June} June) July July | July | July | Aug. } Aug. pon 
4 14 21 29 |) ei? 21 27 3 11 
21 to 
Aug. 11 
rie aah OE lee SS = he Mae Ohh. ke ako @ Slt Saeed, ce <f)o- paaReey 
April 5 planting: | 
Siripped] == ss 1846) 4) = 2054) |\°35..3:>|) 46: 0) }) 542,7 |) 62515) 6856) | 70: 7 |) 7323 | 7423 39. 0 
Unstrppedsis= sulin ee. [an 8 34.3 46. 2 51.9 62. 0 67.4 70. 2 71.8 | 73.4 36.1 
Increase in | 
growth of | | 
stripped : 
Plan GS as | Ss ee es | ee ee ee ee Jacechee| Settee! ee ks —— ae ee ee 2.9 
Apr. 16 planting: ~ | | 
Siripped ==. 21.8] 28.2 35.9 45.9 OOs0 63. 5 76. 1 82. 4 85. 2 85. 8 49.9 
Paistripnedeeeies chile. rel 33.6 | 41.9} 49.2] 53.0] 5841 61.6] 65.4] 66.5 32.9 
Increase in 
growth of 
stripped i 
joe RSS oS ee eo eee aeeeee| Seeeee somes Eee ee (eer | 17.0 
Apr. 25 planting: “| 
Stripped_______-- TAA) AOU 2554s |S See | a S8orGal 4649 a oS. Onl nos. Sila O70 len6ead 43.3 
(Winstiippedsse= 4 |-— eae eee he Zend 3322 41.1 48.8 57.4 61. 2 64. 4 66. 3 38. 6 
Increase in 
growth of 
stripped 
PREMIER pe | eee | eed (1 en et |S ego) leg apn ed Fa es cre | ee Ue ce ae 4.7 
Stripped_____--__- PO ||, TESS | PAL SS GEO S BSRS 7 ZEA) CERO NE SE aL i GE) 1) Gy 2! 44.] 
Umstrpped se o8 | san ee 22-8 | 3125 | 40:8) 50:6) 63859 | 7018} 75.8 | 781 55. 3 
increase in 
growth of | 
uustripped : | 
OTe Sees ates ee eae eo fi Sea ae (lees 11.2 
If acceleration of fruiting results from the removal of squares this 
would be shown by an increase in the number of fruiting branches 
or by an increased number of internodes on the branches. Weekly 
records ot the number of fruiting branches from June 3 to August 11 
en stripped and on unstripped plants are shown in Table 24. In the 
stripped plants of the April 5 planting, from which 43.3 per cent of 
the squares were removed on June 20, there was a total increase of 
only four-tenths of a fruiting branch per plant for the entire season. 
The gain in the number of fruiting branches of 2.5 in the stripped 
plants of the April 16 planting and 0.3 in that of April 25 with a loss 
of 1.4 in the May 5 plantas would indicate that no significant in- 
crease in thenumber of fruiting branches was obtained by the removal 
of squares. The stimulating effect of the removal of 43.3 per cent of 
the squares was not sufficient to change materially the normal rate 
of fruiting-branch production.° 
} § Martin, R. D., W. W. Ballard, and D. M. Simpson. Growth of fruiting parts in cotton plants. Jn 
- Jour. Agr. Research, v. 25, p. 195-208, illus. 1923. 
