Report on Pnvention ani Cure of^‘ Potato Disease” 769 
tions. There was a moderate amount of disease in the crops made 
use of. With “Magnum,” disease was reduced from 12-75 per 
cent, to 4 per cent., and, concurrently, a large gain of crop was 
obtained. AVith “ Bruce,” disease was lessened from 9 per cent, to 
1‘65 per cent., and a considerable increase of crop was yielded also. 
These results were distinctly favourable to the use of the early 
application. 
6. South Wales. Mr. Thomas Broivn’s Farm. — As already 
stated, the trial plots were in two cases free from any disease, 
and had therefore no bearing on the question of the efficacy of the 
bouillie hordelaise in preventing or in checking disease. A decrease 
of crop was the result in one instance. The crops were singularly 
small, less than 2^ tons per acre of the “White Elephant” being 
raised, and only 4 tons per acre of “ Beauty of Hebron.” It would 
Table VI. — Pembroke. 
Dressings per acre 
1 Sound tubers 
1 per acre 
1 
Diseased tubers 
per acre 
Percent- 
age of 
ilisense 
Increase of 
sound tubers 
per acre 
Cost of 
dressing 
per acre 
“ BEAUTY OF. HEBRON” 
1 t. cwt. qr. lb. 
t. cwt. qr. lb. 
per cent.j 
cwt. qr. lb. 
J. J. 
A 100 g<als. June 18 
14 12 0 
— 
1 
/ decrease ) 
C 
! 4 6 1 0 

1 
1 4 3 0 / 
00 
“WHITE ELEPHANT 
- 
A lOO gals. July 4 
12 9 0 0 
1 — 
— 
1 J decrease 1 
0 
1 2 9 3 14 
1 — 
— 
ItO 3 11 1 
CO 
“IRISH FLOUNDER’ 
A 100 gals. June 18 
16 8 1 ]() 
0 17 2 161 12 1 
12 3 2 
00 
C 
j 6 15 2 14 
1 4 3 26 17-67 i 
1 
— 
— 
Plot A, ciuly application ; C, untreated. 
hardly be satisfactory to consider these results conclusive. A some- 
what larger crop was shown with the “ Irish Flounder,” and though 
there was some doubt as to the actual appearance of disease, it was 
found, on raising the crop, that from 12 to 17^ per cent, were bad, 
and that where the dressing had been used (plot A) a larger crop of 
sound tubers was obtained and a less proportion of bad ones. 
Conclusions. — Putting together the results obtained from the 
different stations, excluding Cheshire, there is a unanimous verdict 
upon four points : — 
1. Thai the dressing with bouillie hordelaise, though it does not en- 
tirely prevent disease, has a marked effect in lessening the extent 
to which disease spreads. 
2. That associated with the lessening of disease is an almost 
certain increase of crop, which more than pays for the cost of appli- 
cation of the dressing. 
3. That the best treatment is an early application of the bouillie 
bordelaise before disease has made its appearance, and that this 
