DAMAGE TO SUGAE CANE BY THE SUGAR-CANE BORER. 



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

 borer injury to sugar cane — Continued. 



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



THE SAMPLE. 



Experiment 2. — The remarkable figures obtained in Experiment 1 

 showed the advisabihty of conducting a further experiment upon a 

 larger scale in order to obtain more conclusive results. For this 

 experiment 30 canes were selected at random from D. 74 cane. Of 

 these 10 were borer-free, 10 were medium infested (1 to 3 joints per 

 cane sho^ving borer injury), and 10 were heavily infested (5 or more 

 infested joints per cane). It should be remarked that the mfestation 

 in the heavily infested canes was not so heavy as was the infestation 

 of samples 2 and 4 of the first experiment, in wliich every joint was 

 infested. Each sample of 10 canes was separately weighed, run 

 through the hand mill, and analyzed exactly as had been done with 

 the samples of the first experiment. The anah^ses were again made 

 by Mr. W. G. Taggart. The results obtained fully upheld those of 

 the first experiment. 



Sample 2 (medium infested) sliowed losses due to the borer of 0.3 

 per cent juice, 1 per cent total solids, 1.2 per cent sucrose, 2.2 per 

 cent purity, and an increase of solids not sugar of 0.1 per cent. 

 Sample 3 (heavily infested) showed losses of 2.3 per cent juice, 3.4 

 per cent total solids, 4.6 per cent sucrose, 12.7 per cent purity, and 

 an increase of 0.7 per cent solids not sugar. 



Reduced to a basis of 1 ton of cane to the sample, the results were 

 as follows: Sample 2 (medium infested) showed losses per ton of 

 cane of 6 pounds juice, 13.19 pounds total solids, 15.46 pounds 

 sucrose, 8.78 per cent actual loss of sucrose, and an increase in 

 solids not sugar of L15 pounds. Sample 3 (heavily infested) showed 

 losses per ton of cane of 46 pounds juice, 47.85 pounds total solids, 



