COTTON IN WEEVIL-CONTROL EXPERIMENTS 29 
TABLE 17.—Average row yields of cotion in all experiments conducted at San 
Antonio 
e | 
| Average 
Date yield 
Kind of experiment planted, | Treatment for weevils | Plant spacing pita 
192 TOW 
(pounds) 
a : = hinned == 11.1 
Separate late planting_-_-----_- May 27) None 422 seh ee tas 4 = 2 Bianca Fail (oad. Soke 10. re 
fApr. HOP Square stripped) poi- |= 24202 2 Sa eee eee 11. 82 
soned. 
Successive adjacent plantings_!{ Apr. 28 |____- OC) RESUS EL Ret oS oe ae jee GG Vet AO ee LE a 8. 81 
\|May 5] Poisoned_____-_-_-_-_- ahs PTICD ae a ps aie ly Sait A 8. 98 
Jee SAS eee 0a Rees | RS a CAF aA Sod 1 Ae 3. 25 
oops Te + Wnthinne dss: 22222852252 sis 8. 28 
Gulturaltest- No.1, feld-@324|A pr. (237|-None2. = 4 22 2s Mt plant to 12 inches tadihs ao 6. 78 
= 4 \f1 plant to 10 inches________-_- 5.8 
Cultural test No. 2, field C3__|__- GO Se i ee Oey as eee ‘\2 plants to 10 inches_________ 6.5 
Lone Star check in variety | Apr. 22 |____- GOL e his. AeA ee NGM CHES ae ha PEAT eee ee a 6. 5 
test D3. | q 
° | 
SOIL, CLIMATIC, AND WEEVIL CONDITIONS AT CHARLESTON, S. C. 
A comparison of successive plantings of cotton was made in South 
Carolina on the farm of F. P. Seabrook on James Island, about 10 
miles southeast of Charleston. The soil where the cotton was 
planted is light and sandy, well drained, and representative of the 
lighter type of soil of the Sea Islands. It is technically described by 
the Bureau of Soils as Norfolk fine sand. This type of soil normally 
produces a comparatively small plant and is admirably suited for 
cotton. 
The winters are mild, and the soil becomes warm early in the 
spring. Cotton can usually be planted the last week in March 
without danger of frost injury. The summer temperatures are 
moderate. Rainfall is abundant and fairly well distributed, although 
periods of dry weather are often experienced in the spring and early 
summer, while periods of excessive rainfall are common in late July 
and August. Records of maximum and minimum temperatures and 
of the precipitation were obtained at James Island from March 14 to 
October 15. These records are summarized in Table 18. 
TABLE 18.— Average maximum and minimum temperatures and monthly precipi- 
tation at James Island (near Charleston), S. C., from March to October, 1923 
7 ) ] i 
| | | 
Items of comparison Mar. Apr. May | June July Aug. | Sept. Oct. 
Average temperatures (° F.): 
Weprarapamn Stee hes eee EE ok 167.3 122 77.0 | 85.6 87. 2 88. 9 85.4 | 276.9 
PVITTIMUTT ere eee ee ee OS 54. 6 GE SS | a ae | ee Ne fc aS 
Precipitation (inches) __-__-___..--____- 2523 1. 82 6. 27 | 2. 54 9. 36 8. 09 35 IG’ 3. 06 
1 March 14 to 31 only. 2 October 1 to 15 only. 
During the season of 1923 cold dry weather during April was 
unfavorable to the growth of cotton in the seedling stage. With 
warmer weather and more abundant moisture in May, growth became 
more rapid, and conditions were favorable for setting a crop during 
June and the early part of July. Excessive rainfall in the latter part 
of July and in August resulted in an abnormally high degree of boll 
shedding. 
