150 



STUDIES IN INDIAN SUGABCANE 



Character 



Sunnabile (Jnjui 



Anthesi.s. Open authors and 

 good pollen present only in 

 the Saretha group. 



Seed production and seedlings 

 obtained only in the Saretha 



Number of dead leaves on the 

 cane. There are fewer of 

 the^e in the Saretha series. 



Length of the part of the cane 

 bearing these dead leaves. 

 It is slightly greater in the 

 Saretha series. 



Length of living shoot. This 

 is greater in the Saretha 

 series. 



To tal length of plant is greater 

 in the Saretha group. 



I. General— roMcW. 



In all the varieties flowering 

 some of the arrows show 

 80 — 90% of open anthers. 



Any number of seedlings can 

 readily be obtained from 

 many of the varieties, espe- 

 cially the more primitive 

 ones. 



Average numbers — 



1916, 2.3 



1917, 15 



Average measurements — 



1916, 7' 7" 



1917, 4' 8' 



1916, 6' 5" 



1917, 6' 7" 



1916, 13' 4" 



1917, 14' 0" 



In all tluwers the anthers are 

 comj)letely closed. 



No seedlings have been ob- 

 tained, excepting a batch 

 from Naanal in 1913, but 

 there is some doubt as to 

 these. 



Average numbers — 



1916, 32 



1917, 16 



Average measurements — 



1916, 7' 5" 



1917, 4' 2" 



1916,5' 11' 

 1917,5' 11" 



1916, 10' 1" 



1917, ir3" 



Length of stripped cane. This 

 is greater in the Saretha 



Number of joints in the cane. 

 This is greater in the Sunna- 

 bile series. 



Average length of joint in 

 mature part of cane. This 

 is longer in Saretha series. 



Average thickness of cane is 

 greater in the Sunnabile 

 series. 



Cane module is much greater 

 in the Saretha series. 



Length of joints in different 

 ])arts of the cane. This can 

 be best seen in the curves on 

 Chart XL 



IL The Cane. 



Average measurements- 



1916, 97 2" 



1917, 75 9" 



Average numbers — 

 1916, 33 

 1917,26 



Average measurements 



1916, 3-9" 



1917, 3-8" 



1916, 0-66" 



1917, 0-67" 



Average numbers — ■ 



1916, 115 



1917, 146 



Average measurements- 



1916, 921" 



1917, 640" 



Average numbertj — 



1916, 40 



1917, 27 



Average measurements- 

 1916, 2-9" 

 1^1917, 30" 



1916, 0-73" 

 1917,0-77" 



Average numbers? — 



1916, 87 



1917, 119 



The Saretha joints are longer, but there are more of them in 

 Sunnabile. The latter curves are therefore longer. The 

 joints increase in length up the stem more rapidly in 

 Saretha and roach an earlier maximum, and, after this is 

 reached, they decrease more rapidly- The Sunnabile curve 

 crosses that of Saretha towards the end because of the larger 

 number of mature joints. There are, generally, greater fluc- 

 tuations in the Saretha scries, the length of joint being more 

 uniform in the Sunnabile series. 



