90 



Table XXIV. — Study of the infestation of cotton fields at Calvert. Tex.^- Cont'd. 







Block. 





Average 

 infesta- 

















Tinie of record. 











tion for 



Climatic conditions. 





53 



51 



oo 



56 



entire 31 

 blocks. 















Per cent. 





August 15-17 



61 



69 



67 



62 



58.88 



Rainfall in July. 1903, 8.61 inches (or nearly 

 four times normal rainfall ) : Aug. 1 to 15, 

 nearly normal rainfall (0.79 inch, Aug. 2). 



Average temperature, July, 85° F.; Aug. 



1 to 15. 85 J° F. 



September 2— t 



89 



91 



90 



97 



91.11 



Rainfall from Aug. 15 to Sept. 2, 0.9 inch 

 (nearly normal). Average temperature, 

 same period. SU° F. 



September 11-17.. . 



91 



96 



97 



95 



93.20 



Rainfall from Sept. 2 to 14, 0.8 inch (about 

 one-half normal ) . Average temperature, 

 83i° F. 



October 1-3,. 



78 



92 



SS 



89 



91. 56 



Rainfall from Sept, 11 to Oct. 1. 0.11 inch 

 (about one-tenth normal) . Average tem- 



























perature, 76§° F. 



October 22-21 



95 



99 



98 



95 



93. 67 



Rainfall from Oct. 1 to 22, 3.63 inches (more 

 than two times normal). Average tem- 

 perature, 71° F. 



Still another series of observations made by Doctor Morrill, at Austin, 

 Tex. , shows that similar conditions prevailed in localities nearly 100 

 miles apart. For each of these percentages 300 squares were exam- 

 ined, thus making 14,400 observations in the series. 



Table XXV. — Study of the infestation of cotton fields at Austin, Tex. 



Time of record. 



Block. 



1 | 2 



3 



4 



5 



6 



'1 



8 



9 



10 



11 



12 



1903. 



August 1-7 



September 7-9 



October 5-7 



29.0 

 95.3 

 90.3 



31.0 

 95.0 

 88.0 



11.0 

 95.3 

 90.3 



15.0 

 96.7 

 90.0 



10.0 

 92.7 



91.7 



9.0 

 87.3 

 85.3 



19.0 

 95.0 

 92.0 



33.0 

 96.7 

 92.0 



13.0 

 96.7 

 96.0 



43.0 

 96.7 

 96.0 



36.0 

 95.3 

 92.7 



31.0 

 93.7 

 96.0 



Time of record. 



13 



Blc 

 14 



ck. 

 15 16 



Average 

 infesta- 

 tion, en- 

 tire 16 

 blocks. 



Climatic conditions. 



1903. 

 August 1-7 



33.0 

 93.7 

 92.0 



36.0 

 98.0 

 89.3 



19.0 55.0 



Per cent. 

 30.37 



95.25 



91. 87 



Julv rainfall, 12.65 inches (above nor- 



September 7-9 



98.3 

 92.7 



97.7 

 92.7 



mal 1035 inches). Mean average 

 temperature. July. 82.6° F. 



August rainfall. 0.79 inch (below 

 normal 1.61 inch). Mean average 

 temperature. 82.6° F. 



September rainfall, trace (below nor- 

 mal 3.72 inches). Mean average 

 temperature, 76° F. 





As the first records at Austin were made about ten days earlier 

 than were those at Calvert, they serve to show a much greater total 

 increase in the average infestation during August, though the average 

 daily increase in the percentage of infestation agrees very closely in 

 the two localities, being 1.8 per cent at Calvert and 1.9 per cent at 

 Austin. 



A decrease in square production accompanies the maturity of the 

 bulk of the crop, owing to the fact that the assimilative power of the 



