New York AGRICULTURAL EXPERIMENT STATION, 151 
badly and died early in spite of spraying. On the drier portion of 
the field the variety [ronclad did considerably better. There was a 
tank growth of vines which did net blight until! late in the season 
The test rows were dug by hand October 11. 
Test No. 1. Ironclad.—The unsprayed rows were 773 feet long. 
Up to the time of digging there had been no frost and the sprayed 
plants although much blighted still retained about one-fifth their 
foliage. The unsprayed rows were now dead but there had been no 
marked difference in appearance between the sprayed and unsprayed 
rows until within a few days. The yields were as follows: 
Second sprayed row on the west, 45714 lbs. marketable tubers. 
Middle unsprayed row, 303 lbs. marketable tubers. 
Yield, sprayed, 143 bu. 21 lbs. marketable tubers per acre. 
Yield, unsprayed, 04 bu. 56 lbs. marketable tubers per acre. 
Gain, 48 bu. 35 lbs. marketable tubers per acre. 
On both rows there was a large amount of rot, somewhat more 
on the unsprayed row than on the sprayed one. The yield of small 
and rotten tubers was 60 bu. 57 lbs. per acre for the sprayed and 
71 bu. 36 lbs. per acre for the unsprayed. 
Test No. 2. World's Fair.—The unsprayed rows were 633 feet 
long. Both the sprayed and the unsprayed plants had been dead 
for some time. The yields were as follows: 
Second sprayed row on the west, 109% lbs. marketable tubers. 
Middle unsprayed row, 47 lbs. marketable tubers. 
Yield, sprayed, 41 bu. 53 lbs. marketable tubers per acre. 
Yield, unsprayed, 18 bu. marketable tubers per acre. 
Gain, 23 bu. 53 lbs. marketable tubers per acre. 
Here, also, there was much rot, the sprayed row showing a little 
more than the unsprayed. The yield of small and rotten tubers 
was 26 bu. 11 lbs. per acre for the sprayed and 24 bu. 17 lbs. per 
acre for the unsprayed. 
Combining the results obtained in the two tests there is an 
average gain of 36 bu. 14 lbs. per acre. In one test spraying in- 
creased the yield 51.2 per ct. and in the other 132.6 per ct. making 
an average of QI.9 per ct. 
At the time of digging the test rows there was no market for 
potatoes in Peru, but a few days later the market opened at 55 cents 
per bushel. At this price 36 bu. 14 lbs. of potatoes would be worth 
