; 
168 Report OF THE BOTANICAL DEPARTMENT OF THE 
Mr. Hitchings is of the opinion that many farmers do not 
spray as thoroughly as they should to get good results. He 
advocates the use of about 80 pounds pressure in order to get a 
fine mist-like spray. 
EXPERIMENT NO. 32. 
Conducted by P. 8S. Doolittle, Cassville, Oneida County. He 
sprayed 714 acres of potatoes, mostly of the variety Carman No. 
3, four times with a one-horse, four-row, Aspinwall sprayer 
having one Vermorel nozzle per row. Four rows were left un- 
sprayed for a check. The total cost of spraying, including an 
allowance of $2 for wear on sprayer, was $19.50. There were so 
few bugs that no poison was used on either the sprayed or un- 
sprayed rows. 
The sprayed rows still retained about half their foliage when 
frost came, but the unsprayed rows died about four weeks before 
frost. 
On one of the unsprayed rows 72 hills three feet apart yielded 
2 bushels, or at the rate of 134 bushels 26 pounds per acre, while 
the same number of hills on the adjacent sprayed row yielded 3 
bushels, cr at the rate of 201 bushels 40 pounds per acre, making 
a gain of 67 bushels 14 pounds per acre in favor of spraying. 
There was much more rot on the unsprayed row than on the 
sprayed, the loss on the latter being only about one bushel per 
acre. On another variety, Stump the World, in the same field 
and sprayed in the same manner the loss from rot was about 50 
bushels per acre. The vines of this variety grew so very large 
that Mr. Doolittle found it impossible in the last two sprayings 
to cover all of the foliage with only one nozzle per row. More- 
over, the large growth of vines made conditions exceptionally 
favorable to blight and rot. 
Mr. Doolittle believes that spraying increased his crop by 50 
per ct. His average yield was 200 bushels per acre, while 
neighboring unsprayed fields averaged 100 to 125 bushels per acre. 
Market price of potatoes at digging time, 50 to 60 cents. 
EXPERIMENT No. 33. 
This experiment was made by J. D. Clegg, Jefferson, Schoharie 
county. About one-half acre of potatoes, variety Green Mountain, 
was sprayed three times with a small hand sprayer, the total 
