New York AGRICULTURAL EXPERIMENT STATION. 109 
“bugs”? was used with the bordeaux in the sprayings of June 25 
and July 5; and for flea beetles in the spraying of July 31. 
Two unsprayed strips of four rows each were left for checks. 
These rows were treated with paris green applied in dry form 
by means of a Leggett powder gun on June 22 and July 6 which 
was sufficient to control “ bugs ” thoroughly. 
On July 12 traces of late blight were found on some unsprayed 
early potatoes adjoining the experiment field, and a few days later 
it appeared on the check rows in the experiment. A thorough ex- 
amination of the experiment was made July 19. At this time there 
was no early blight, no flea beetles and no evidence of injury by 
“bugs;”’ but late blight was quite plentiful throughout the entire 
length of both unsprayed strips. On the north side of the field 
there was so much blight on the unsprayed rows that they were 
readily distinguishable from the sprayed rows. However, there was: 
some blight on the sprayed rows also. Eventually, there was a 
marked contrast between the sprayed and unsprayed rows. Most 
of this difference was due to the greater ravages of late blight on 
the unsprayed rows, but flea beetles, which appeared in the latter 
part of July, were also a factor. 
The items of expense for spraying 21 acres of potatoes Io times 
were as follows: 
Bee smeroacopper «Sulphate O:5€ iia) clei cisla vba beapsiote eed b sualaseievey $80.80 
Mer ins. Sal SOA (1). 1256... one ws,5 ches eos EU RETR BI ay A Mee 20.94 
SENET POSE SLCCT NID) ACCT eo eh Net i Nohy tie ad Ok vies ale biecodca eu atle bieie 43.50 
Moetemianor for Mati And tail @) A0F oe. ok we eee wei hess een cates 30.40 
emer iaor TOLrextra Wat) 156. ite a ek CUR a Le lew ae ele II.40 
PBL ECDC AWET Lents Cate Ceara Dire cle av plalod veh he Wylde So. <6 owen ys 15.00 
Ms Aletta ais Snr eo Ubi etna oe fats Sa'G b la'ee® ea? Qe oe $202.04 
The total expense of spraying was $9.62 per acre or 96 cents 
per acre for each application. 
One set of test rows was dug on September 14, the other on 
October 6. The results were as follows: 
East test. ‘The rows were 690 ft. long by 3 ft. wide, 21.04 rows 
being required to make an acre. The yields were as follows: 
Two sprayed rows (second one on each side), 1,768 lbs. marketable tubers. 
Middle two unsprayed rows, 710 lbs. marketable tubers. 
Yield, sprayed, 196 bu. 7 lbs. marketable tubers per acre. 
Yield, unsprayed, 124 bu. 29 lbs. marketable tubers per acre. 
Gain, 71 bu. 38 lbs. market tubers per acre. 
