COTTON IN WEEVIL-CONTROL EXPERIMENTS 



11 



soils, when the moisture supply is plentiful. In the present experi- 

 ment the late-planted cotton made considerably more vegetative 

 growth than that planted early, in spite of drought conditions. 

 The larger growth of the late-planted cotton resulted from the devel- 

 opment of longer internodes on the main stalk and on the fruiting 

 branches. Although the plants grew taller. they had fewer nodes, 

 as shown in Figure 3. 





















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Fig. 4. — Growth in height of cotton plants at San Antonio, Tex. 

 PRODUCTION OF FLORAL BUDS 



The fruiting capacity of a cotton plant is determined principally 

 by the number of fruiting branches formed on the main stalk and 

 the number of internodes formed on the fruiting branches. The 

 plants in the successive plantings at San Antonio were small and 

 formed few squares on secondary fruiting branches, and these are 

 not included in comparisons of the fruiting capacity of plants. 



The average number of squares formed on 10 plants in each of the 

 four plantings is given in Table 7. The numbers of squares were 

 recorded at 2-week intervals throughout the fruiting stage of the 

 plants, the final record on August 11 representing the total number 

 of squares formed on the plants. 



Table 7. — Average number of squares recorded at 2-week intervals on cotton plants 

 grown in successive plantings at San Antonio on four different dates 





Date planted, 1923 



Number of squares recorded on — 





June 1 



June 15 



June 28 



July 13 



July 28 



Aug. 11 



Apr. 19 



2.2 

 

 

 



10. 6 



6.5 

 5.7 

 1.7 



21.7 

 18.0 

 17.0 

 12.8 



26.6 

 26.4 

 23.1 

 24.2 



31.9 

 33.3 

 25.8 

 26.4 



35.3 



Apr. 2S 



38.7 





28.5 



May 12.. 





30.9 







