New YorkK AGRICULTURAL EXPERIMENT STATION. SI 
of about ten days, commencing July 10. The spraying outfit 
consisted of a Spramotor barrel pump mounted on a low, two- 
wheeled cart with a Spramotor nozzle-carrier attachment at the 
rear and drawn by one horse. The pump was operated by a 
gearing on one of the wheels. Four rows were sprayed at each 
passage with one nozzle per row. 
The bordeaux mixture was prepared from six pounds of 
copper sulphate and five pounds of prepared lime in fifty gallons 
of water and applied at the rate of about thirty-seven gallons per 
acre, the total quantity used during the season being thirty-nine 
barrels of fifty gallons each. The poison used for “bugs” was 
arsenite of soda prepared by boiling one pound of arsenic and 
four pounds of salsoda in one gallon of water. This was mixed 
with the bordeaux in the proportion of three quarts of the poison 
to fifty gallons of bordeaux, 
The potatoes were in two fields of about five acres each, both 
situated about fifty rods from the water supply. In each field 
four rows were left unsprayed but treated twice with arsenite 
of soda in lime water to protect them from bugs. The potatoes 
were of the variety White Giant in Field No. 1, and Rochester 
in Field No. 2. 
The items of expense of spraying the. 10.4 acres five times were 
as follows: 
mene: Stl Plate 2). 76. Mist dss, ows haw atsdo dt sw hte ole owned ule $16.38 
Mammemmn eta? 11e (1) TSG 0 on. Pa ccsals «, chs aidieca's(d idew ors oe wah acbuc’ 2.92 
Or diss arsenite oi} soda solution: @:214¢. i). sok care le ced een lee owe les 2.10 
Ponpamiatpor fOr Man and horse G).'306. 0 2. ib.c. 50. ole Ss us eects oe Ln PaO OG 
EES ARE OETAG Ko cp tik ek Tvl Shard Bere le es bd ak Mase alelah'y whe May Vee Yee 6.50 
eo EE MEN Ae IST S aga gent ae eee A DID UME LU RT it? Caney SEC AOE Weed RR $48 .co 
The total expense of spraying was $4.70 per acre or 94 cents 
per acre for each application. 
In Field No. 1, on August 1, the unsprayed rows were plainly 
inferior to the sprayed rows on either side. This was due to 
three causes: (1) They had been slightly more injured by 
“bugs;” (2) they had been slightly injured by the arsenite of 
soda applied for “ bugs;” (3) they had been considerably injured 
by a large kind of flea beetle,® while the sprayed rows were but 
very slightly injured. To us, this flea beetle is new as a potato 
pest. It has not appeared in any of our experiments in previous 
5 Systena hudsonias Forst. Identified by P. J. Parrott. 
