27 
Potato Failures. 
return of six pounds of tubers for every pound of seed planted. The 
tubers were all more or less covered with the sclerotia, but were not 
so badly scabbed as the tubers of the check plant. This plat gave a return 
of 36 sacks per acre. 
Plat V—This was the poorest lot of seed, about 30% of the tubers fail¬ 
ing to produce plants which reached the surface of the ground. The plants 
did poorly and many of those that reached the surface of the ground died 
before the close of the season. Thirty-five pounds of seed gave a return of 
107 pounds of small, rough tubers,—a yield of a little over three pounds of 
tubers for every pound of seed planted, making a loss of 42%, a return of 
about 19 sacks per acre. 
Results.—1. Success or failure in potato culture in this section of the 
state depends much upon the Tvater supply. 
2. The corrosive sublimate seed treatment gave no marked results when 
the treated seed was plantd on land which had been under cultivation for a 
number of years. 
3. The formalin seed treatment gave a loss of 17% when such seed was 
planted on ground which had been under cultivation for a number of years. 
4. Carefully selecting seed, free from sclerotia stage, gave a gain of 11%. 
TABLE VI., SHOWING RESULTS OF EXPERIMENT NO. VI. 
Plat Number j 
TREATMENT. 
Number Pounds of 
Seed Potatoes 
Planted 
Total Number of 
Tubers Harvested 
Yield in Pounds 
for every Pound of 
Seed Tubers 
Planted 
Gain or Loss 
I. 
Check_ 
149 
767.30 
5.33 
II. 
Treated with Corrosive Sublimate_ __ 
101 
539.50 
5.34 
III. 
Treated with Formalin_ 
105 
466.50 
4.44 
17* 
Loss 
IV. 
Seed free from Sclerotia, but more or less covered 
with hyphae_ _ 
fO 
475.50 
5.94 
11* 
Gain 
V. 
Cull Seed_ 
35 
107.70 
3.08 
Loss 
m 
o 
a p 
g 
Sh 
rr* 0 ) 
2 Cl 
0) 
• rH 
32 
32 
27 
36 
19 
Experiment VII—Rose Seedling seed was used in this experiment which 
was raised by the Agricultural Department from tubers bought on the mar¬ 
ket in the spring of 1901. Many of the tubers were covered with the hyphae 
and sclerotia of Corticium. This seed was planted on an old berry plantation, 
located on a knoll sloping toward the south and west. The soil is of a 
sandy loam, and has been well cultivated and manured during the past five 
years. It was plowed 8 inches deep in early spring and planted on May 6. 
The rows were planted 40 inches apart, the pieces being put at intervals of 
about 9 inches and 5 inches deep. 
The plants of this experiment were sprayed three times with Bordeaux 
mixture. There was very little difference in the appearance of the plants 
in the various plats at any time during the season. The water was low in 
the ditch during the later part of the summer, so this field was irrigated but 
twice. The plants on the higher soil suffered some from sun scald. Al- 
tenaria was also found on some of the plants, but it apparently developed 
only on those which had an injured root system. The weight of a sack of 
tubers is estimated at 100 pounds. 
Plat I Check—This seed was stored in the dugout all winter. Many of 
the tubers were more or less covered with the sclerotia of Corticium. The 
tubers were cut on May 5 and planted on the following day. These plants 
did quite well, but a number of diseased plants were observed in this plat 
