768 Bepcn-t on Prevention and Cure of Potato Piseasei 
relativ’e influences of once and twice dressing the crop. Disease oc- 
curred to a certain extent in the “ Abundance ” and “ Imperator,” 
but only very slightly in the “ Bruce ” and “ Main Crop.” The 
potatoes were weighed October 5th and 6th. 
“ Abundance .” — Increase of crop, to a well-paying extent, 
resulted from both early and late applications, but the decrease of 
disease was less marked ; the later dressing, however, was the more 
efliectual in staying disease. 
“ Bruce .” — The influence of the dressings was here, in each case, 
to lessen the crop, nor was any result in lessening disease apparent. 
“ Main Crop .” — Here again, where disease was so slight, no 
preventive influence was shown from the dressings, and the crop 
was, in all cases but one, reduced slightly as well, the exception 
being with the plot twice dressed early, but where, howe^'er, the 
increase did not pay for the application. 
“ Imperator .” — Decrease of crop, again, was the result of the 
dressings, and there was even more disease on the early-treated 
plots than on the untreated plots. On the other hand, the late 
dressing seems to have lessened disease slightly and to have given 
a return that just paid fpr the application. 
These results in Cheshire are somewhat anomalous, they show- 
ing in one case (“Imperator”) increase of disease from early dress- 
ing of the crop, and increase of yield in the case of three varieties 
out of the four tried. The conclusion, therefore, is not satisfactory 
to the use of the dressing, be it early or late application, more 
especially the former. It was noted, however, that the soil varied 
considerably in texture on difterent parts of the field, and this not 
improbably had as much to do with the anomalous results as any- 
thing else. 
5. Devon. Mr. Yosper's Farm . — It had been intended to experi- 
ment on “ Early Puritan,” but the crop had gone too far before the 
dressing could be put on, and so it was omitted. Unfortunately 
Table V. — Devon. 
Dressings per acre 
Sound tubers 
per acre 
Diseased tubers, 
per acre 
Percent- 
age of I 
disease | 
Increase of | Cost of 
crop, sound [dressing 
tubers, per acre per acre 
“MAGNUM BONUM” 
' t. 
cut. 
qr. lb. 
t. cwt. 
qr. 
Ib. per cent.' 
t. eu t. qr. 
lb.| 
5. 
(1. 
A 
125 gals. July 22 
, 8 
13 
1 24 
0 7 
2 
Oj I'll 1 
2 3 1 
24 
9 
2 
C 
6 
10 
0 0 
0 19 
0 
0| 12-75 
— 
1 
— 
“BRUCE’ 
A 
125 gals. July 22 
1 9 
11 
3 4 
1 0 3 
1 
4 1-C5 1 
1 12 3 
1 
9 
2 
C 
— 
8 
2 
0 0 
1 0 If) 
0 
0 8-98 I 
— 
— 
Plot A, early application ; C, untreated. 
also, through Mr. Giles not being informed of the occurrence of 
disease, the B plots (late application) were not dressed. Conse- 
quently the trial was confined to the efficacy of the early applica- 
