240 Report OF THE BOTANICAL DEPARTMENT OF THE 
THE GLENHEAD EXPERIMENT. 
Couducted by G. 'T . Powell, Gleuhead, N. Y. Fifteen acres 
of potatoes (in two even were sprayed te Hines The sprayer 
used was a one-horse, four-row ‘“ Spramotor ” sprayer carrying 
two nozzles per row. Arsenite of soda was used with the 
bordeaux in the first four sprayings. This was not necessary 
for bugs, but it was thought the poison might be of assistance 
in checking flea beetles which were very numerous. In one 
lot there was‘a strip of five check rows, in the other a strip 
of three. These were kept free from bugs by one application 
of paris green on June 23. During the drought in July there 
was a marked contrast between sprayed and unsprayed rows 
in both lots. There was no blight, but flea beetles were very 
numerous and injurious. 
The expense account contained the folie ing items: 
400: ibs: copper stilphate (@ 640. JU 9R A oa ee ee ee $26 .00 
2 DbIs; Lime (BBL OO iii ie bay er nee A ei a a 3.00 
1004s! Ral sOGa 1 Teak... cies Cie cia nee Gari sere ae ee 1.00 
30 ibs} whitesarsenie: @cLOer ts 20 We Rs PRE ae ee ee 3.00 
60 Drs.: man dabor:@): 200i. 2. aw ie pene ol eaetead ee unde ele eae aa 12.00 
60 Tires: horse labor (106. Ni \c5 ses eee eens eee ee 6.00 
Wear of SPIAYET. eee eee eters 5.00 
Lobalic. Uwe ehsacbire bn owas cuale adits PUB EE ce ee eee $56 .00 
The test rows gave the following yields: 
West Field. Variety, Green Mountain. Rows 552 ft. x 30 in. 
One sprayed row, 336 Ibs=176.7 bu. per acre. 
One check row, 259 lbs.—=186.2 bu. per acre. 
Gain, 40.5 bu. per acre. 
South Field. Variety, Gold Coin. Rows 450 ft. x 30 in. 
One sprayed row, 215 lbs.—=1: . per acre. 
One check row, 248 lbs.==156.8 bu. per acre. 
Loss, 18.1 bu. per acre. 



Probably some mistake was made in the south field. Mr. 
Powell thinks that the stakes marking the check rows became 
misplaced. However, as definite proof of this is lacking it 
seems best not to reject the experiment. Averaging the two 
tests we have a gain of 12.4 bu., worth $9.92. Deducting the 
expense of spraying, $3.73, leaves a net profit of $6.19 per acre. 
