New YorK AGRICULTURAL EXPERIMENT STATION. 123 
prematurely. On September 12, the plants were all dead and 
the field overgrown with weeds. Mr. Griffith thinks that a fifth 
spraying would have been very beneticial. 
The test rows were dug with a plow on October 6. The yields 
were as follows: 
Second sprayed row on the north, 807 pounds marketable tubers. 
Second sprayed row on the south, 235 pounds marketable tubers. 
Average of the two sprayed rows, 271 pounds marketable tubers. 
Middle unsprayed row, 18044 pounds marketable tubers. 
Yield, sprayed, 166 bu. 46 lbs. marketable tubers per acre. 
Yield, unsprayed, 71 bu. T lbs. marketable tubers per acre. 
Gain, 35 bu. 39 lbs. marketable tubers per acre. 
‘The yield of culls was at the rate of 6 bushels and 54 pounds 
per acre on the sprayed and 8 bushels and 28 pounds on the 
unsprayed. There were a few rotten tubers among both sprayed 
and unsprayed and these were included with the culls. 
The items of expense of spraying 23 acres were as follows: 
114 pounds copper sulphate at 6c........ Br tics habs war Aik $6 84 
TOR Ga TER So Uae ae) md De ee ee co 76 
Pe OUnOpaparig Orecn at LUC. , .5 ee, CL iLE Ske ote es 5 40 
oan oureaADOr fOr MAMMAL LOC es sn. ce gk slate oes de tee 2 40 
PEON T a ADOT LOL MOIS AU LUCY. 9s huis ake t cfetleye Oe 8 1 60 
Pe EERIE SLL VICIS tao os. n ek amet Oe olds Mite oe a ce rea ee 1 00 
TR NOR te a Se ee ey a eat, eae: SEO ee $18 00 
POruecCOStiOl SPLAyile Per Acres, Valse aes cael welele $6 75 
Cost per acre for each spraying..............46. i ane 1 69 
The cost of spraying was greatly increased by the enormous 
quantity of paris green used. This item amounted to $2.02 per 
acre. ; . 
At digging time the market price of potatoes was 30 cents per 
bushel, but early in November it rose to 50 cents. At 30 cents 
per bushel 35 2-3 buskels would be worth $10.70. Subtracting 
$6.75, the cost of spraying per acre, there remains a net profit of 
$2.95 per acre. 
