It is especially advisable to make such a stock solution of 
lime, since quick lime will not keep long, while the milk of lime 
does. One may to advantage slack a large quantity of lime and 
mix with water at the rate of 1 lb. of lime to 1 gallon of water. 
Keep in a covered barrel or vessel, and, when needed, stir well 
and use 1 gallon of stock solution for each pound required. 
Diseases found in the potato tuber Remedy 
1 . Affecting the ski?i of the potato 
tuber. 
Common scab 
Russet Scab (Black Scurf, or Rhizoc- 
tonia) 
Powdery scab 
Potato wart 
Silver scurf 
Soak seed 1 J to 2 hours in formaldehyde. 
Plant in soil free from scab. 
Soak seed 1 J hours in corrosive sublimate. 
Plant in clean soil. 
Do not plant affected tubers. 
Ditto 
Ditto 
2 . Affecting the stem of the grow- 
ing plant and vascular system. 
Black-leg (blackens the lower part of 
stem ) 
Reject all bruised or cracked tubers and soak 
selected seed in formalin. Remove dis- 
eased plants from field. 
Do not plant tubers showing darkening at 
stem end. 
Ditto 
Ditto 
Reject tubers with weak sprouts. 
F usarium wilt ( This and the two follow- 
ing causing tuber flesh discolorations) 
Verticillium wilt 
Bacterial wilt 
Spindling sprout 
3. Causing tuber rots a?id flesh 
discolorations. 
Late-blight (also affects the leaves) dry- 
Do not plant affected tubers showing brown 
discoloration extending in from skin. 
(Spray foliage with Bordeaux mixture). 
Do not plant affected tubers. 
Avoid wounding potatoes. 
Avoid high temperatures and ventilate bins. 
Do not plant affected tubers. 
Ditto 
Ditto 
Jelly-end rot and dry-rot (Fusarium) 
Potato leak (a storage rot) ... 
Blackheart (occurs mainly in overheat- 
ed cars and storage bins ) .... 
Internal brown spot (scattered irreg- 
ularly through the flesh) 
Net-necrosis (brown streaks affecting 
mainly the vascular part of the tubers) 
Eelworms (causing glistening spots un- 
der skin) ... 
4 . Causing often small tubers , but 
otherwise difficult , if not 
impossible , to detect i?i the 
tubers. 
Inspect twice in fields : while blooming and 
shortly before harvest. Discard diseased 
plants for seed. 
E. W. Olive. 
