218 



EXPERIMENT STATION. 



[Jan. 



Effect of Eesanding on Prevalence of Fungous Disease. 



A part of the station bog was resanded in 1911, and most of 

 the remainder in the spring of 1912, with abont half an inch of 

 sand. Two Early Black plots (0 and V) of 9 sqnare rods each 

 were left nnsanded as an experiment, O being located on a 

 portion of the bog sanded in the fall and V on a part sanded in 

 the spring. Checks were laid out on three sides of each of these 

 plots, and in both cases they averaged a distinctly smaller quan- 

 tity of fruit per square rod in the 1912 crop than did the plots 

 themselves. This difference was perhaps caused by the injury 

 done to the vines in the process of sanding. The keeping quali- 

 ties of the berries from these plots and their checks were tested 

 with the results given in the following table : — 



Table VI. 



The same error crept into the measurement of these berries 

 as that noted in connection with Table III. The berries were 

 handled throughout in the same way as were those from the 

 fungus spraying plots. The results seem to indicate that rc- 

 sanding favors fungous diseases. 



As a check on the results obtained from the screening, shown 

 in Table VL, the results of examination and counts, given in 

 Table VII., are of interest. These counts were made on ISTovem- 

 ber 16. Each number given in Table VII. is the average of 

 the counts of the decayed berries in 6 samples, taken in the same 

 way as with the berries of the fungus spraying plots. 



