New York AGRricuururaAL EXprriMent Srarion. 133 
ficial, but owing to the pressure of other work it was impossible 
to make it. Moreover, the field was overgrown with large weeds 
which covered the potato plants to such an extent that it would 
not have been possible to reach more than about one-half of the 
plants with the spray. 
The test rows were dug with a double mold-board plow on 
October 18. The yields were as follows: 
Second sprayed row on the west, 278 Ibs. marketable tubers. 
Second sprayed row on the east, 357 Ibs. marketable tubers. 
Average of the two sprayed rows, 815 lbs. marketable tubers. 
Middle unsprayed row, 158 lbs. marketable tubers. 
Yield per acre, sprayed, 134 bu. 36 lbs. marketable tubers. 
“veld per acre, unsprayed, 67 bu. 28 lbs. marketable tubers. 
Gain per acre, 67 bu. 8 lbs. marketable tubers. 
The yield of culls was 2534 bushels per acre on the sprayed 
and 29% bushels on the unsprayed. 
The loss from rot was somewhat greater on the unsprayed 
rows than on the sprayed, but it was not large in either case. 
The sprayed rows yielded almost exactly twice as much as the 
_unsprayed. However, it is somewhat doubtful if all of this 
remarkably large difference may be fairly attributed to spraying. 
Mr. Colyer thinks that the sprayed and unsprayed rows had 
practically the same chance, but in our judgment the unsprayed 
rows suffered somewhat more from bugs. They were treated 
once with dry paris green applied with a powder gun, while the 
sprayed rows received one application of paris green in bordeaux 
at the first spraying. 
The items of expense of spraying fifteen acres four times in 
this experiment were as follows: 
384 pounds copper sulphate, at 6c.................6. $23 04 
Pee DALTels MMe rAU plisoes oS 1S atdets o6ibs lg icte eovlisians 2 03 
pole pounds paris green, at 14¢...5 0.0.0. Gos ee ee 3 71 
Paenoues ia bor Lor team, (at, 25€ «02. <\21G taodieiniera< sie 2 0's 10 00 
40 hours labor for man, at 15c..... RR ee Oe 6 00 
RCTS VOT ae edi dca sielecn oe +0 1+of ena Se ptegt aw Oke pid ea) 
+ ERE, 2 SSeS i it Oe) ree a OLA age cathe nn $45 78 
Total cost of spraying per acre..... aoe ae So dt? bated $3 05 
Wose per acre for Cach Spraying «2.0.0.0 6 5 cece ec tee oa 7614 
