136 REpPoRT OF THE BOTANICAL DEPARTMENT OF THE 
Up to August 1 there was not even a trace of late blight in the 
experiment field. At that time there was no difference between the 
sprayed and unsprayed rows except that the latter seemed to have 
been slightly more injured by bugs. We did not see the experi- 
ment after August 1 and have no definite information as to the 
cause of the increased yield on the sprayed rows. 
The potatoes having been planted early, matured early. The test 
rows were dug September 7. They were sorted and weighed by 
Mr. S. H. Cridler of Arkport, no representative of the Station 
being present. The yields were as follows: 
Second sprayed row on the west, 882 lbs. marketable tubers. 
Middle unsprayed row, 674 lbs. marketable tubers. 
Yield, sprayed, 147 bu. marketable tubers per acre. 
Yield, unsprayed, 112 bu. 20 lbs. marketable tubers per acre. 
Gain, 34 bu. 40 Ibs. marketable tubers per acre. 
Spraying increased the yield of marketable tubers 30.8 per ct. 
No record was kept of the yield of culls. There was no rot. 
On October 12 the market price of potatoes in Arkport was 50 
cents per bushel. At this price, 3424 bushels of potatoes would 
be worth $17.33. Subtracting $3.95, the cost of spraying, we have 
left a net profit of $13.39 per acre. 
Owing to early planting, the potatoes must have been nearly 
mature before blight became epidemic. This probably explains the 
small gain in this experiment. 
THE ATLANTA EXPERIMENT. 
Conducted by T. S. Darling, Atlanta, Steuben county. As this 
experiment covered two fields of four acres each, of different 
varieties and planted at different times it was thought best to leave 
an unsprayed strip in each field. The spraying in both fields was 
done with a “ Watson” one-horse, four-row power sprayer. In the 
earlier sprayings, only one nozzle was used while in the later 
sprayings two nozzles per row were used. We believe this a good 
practice. Water for making the bordeaux was hauled to the field 
in barrels on a wagon a distance of about one-half mile. A separate 
account was kept with each field. 
Field No. 1.—This field contained four acres of the variety Car- 
man No. 1. It was sprayed four times —July 7, 20, August 1 
and 14. One nozzle per row was used in the first three sprayings 
