Washington, D. TC. v April, 1925 
BEHAVIOR OF COTTON PLANTED AT DIFFERENT DATES IN WEEVIL- 
CONTROL EXPERIMENTS IN TEXAS AND SOUTH CAROLINA 
By W. W. Batuarp, Senior Scientific Aid, and D. M. Simpson, Assistant Agron- 
omist, Office of Crop Acclimatization and Adaptation Investigations, Bureau of 
Plant Industry 
CONTENTS 
Page Page 
EM ETOGUCHIONS = eee Mies Nickens ay ewe 1 | A separate late planting at San Antonio_-_-_-_-__- 
Soil, climatic, and weevil conditions at San An- Yields from cotton experiments at San Antonio. 28 
HOWION MROXS EA di NEG Re ee Ea ee ee 2 | Soil, climatic, and weevil conditions at Charles- 
Comparison of successive adjacent plantings at LO) PAS) ROR SEEN ts SOU se i SI cl 29 
SATA GOTO Seer uta tc rmupe mcd e i RW ects ext 3 | Comparison of successive adjacent plantings at 
Yields from successive plantings at San An- @harlestom 2a a ee 
LAD ROU Gs Sa A RE aT A ne Sage ONE 19 | Yields from successive plantings at Charleston_ 38 
Percentage of 5-lock bolls on early and late Adverse conditions at Gainesville, Fla________ 41 
Planhinesiap SanvAcItONIONss 22 e5 ee ease eed oe ODN GS ULTTUTIT AT AY og ee eR ee a Bin ee La Laas ee 41 
INTRODUCTION 
More information is needed on the growth and fruiting habits of 
early and late planted cotton in relation to cultural control of the 
boll weevil. In the season of 1923 comparisons were made of the 
behavior of early and late plantings in Texas and South Carolina, 
and differences were shown in the rates of growth and the fruiting 
-habits of the plants. | 
A more rapid formation of nodes during the seedling stage of the 
plants was found to occur in the later plantings, resulting in a shorter 
interval between the date of planting and the appearance of the first 
floral bud. The fruiting capacity of late-planted cotton was found 
to equal and in some cases to exceed that of the early-planted cotton. 
The large number of floral buds produced in later plantings was due 
to the fact that more nodes were produced on the lower fruiting 
branches. Also, slightly larger numbers of flowers were recorded on 
the late-planted cotton, although the early plantings produced a 
larger number of flowers during the first part of the flowering period. 
The experiments were made in three places—San Antonio, Tex., 
Charleston, S. C., and Gainesville, Fla. The object of having 
similar tests in three widely separated parts of the Cotton Belt was 
to secure comparative data of plant development under different 
soil and climatic conditions. The experiments consisted of side-by- 
side comparisons of cotton planted on four different dates. An 
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