DAMAGE TO SUGAE CANE BY THE SUGAR-CANE BOEER. 



11 



an average of 1.76 pounds per cane, and the 341 borer-free canes 

 weighed 626 pounds, an average of 1.84 pounds per cane. This gives 

 an average loss in weight of 0.08 pound per cane. In 1 ton of cane 

 like each of these samples there would be 1,087 borer-free canes and 

 1,136 borer-infested canes; or, in other words, it would requnc 49 more 

 infested canes to make a ton than of borer-free canes. On a crop 

 basis of 25 tons of uninfested cane per acre, this would show a loss of 

 about 1 ton of cane per acre due to the borer. 



Each lot of cane was then run tlirough the mill separately and a 

 sample of the juice taken. The 626 pounds of borer-free cane gave 

 431 pounds of juice, or 68.85 per cent extraction, while the 694 pounds 

 of infested cane gave 455 pounds, or 65.56 per cent extraction. The 

 loss of juice due to the borer was thus 3.29 per cent. 



The two samples of juice were analyzed by Mr. W. G. Taggart, and 

 showed a loss due to the borer of 1.5 per cent total solids, 2.1 per 

 cent sucrose, and 5.6 per cent purity, with mcreases of 0.1 per cent 

 glucose and 0.5 per cent soHds not sugar. Figured on a basis of 1 ton 

 of cane per sample, the losses are 66 pounds of juice, 30.69 pounds 

 total solids, 36.57 pounds, or 19.33 per cent, sucrose, and increases of 

 0.72 pounds glucose and 5.17 pounds solids not sugar. The results 

 of this analysis are shown in Table VII: 



Table VII. — Analysis of sugar cane (D. 74) to determine effect on sugar content of the 



borer injury to cane. 



Note. — The above samples of eane constituted a wagon load which was taken to the sugar mill and there 

 separated into infested and noninfested lots. There was no selection of canes in the field and the least borer 

 injury served to throw a cane into the infested samples. December 13-14, 1910. 



RESULTS OF ABOVE ANALYSIS FIGURED ON A BASIS OF 1 TON OF CANE TO 



THE SAMPLE. 



