WISCONSIN HORTICULTURE 
April, 1917 
118 
Spray Pumps. 
Dr. E. D. Ball, State Entomologist 
Spray pumps may be roughly 
divided into four groups, accord- 
ing to size and capacity. 
Bucket Pumps. 
The first group consists of 
bucket pumps, knapsack sprayers, 
compressed air sprayers and sim- 
ilar small outfits ranging in cost 
from about four dollars to twenty 
dollars. 
The small brass bucket type of 
pump, with a long lever, will give 
a fairly good pressure, and by 
putting on a much longer hose 
than that ordinarily furnished 
can be used for a large number of 
small jobs in town lots and small 
truck patches with good success 
and at a minimum cost of four to 
eight dollars. 
The knapsack outfits, com- 
pressed air sprayers and that 
class are worth their cost where 
there is a large amount of truck 
which requires nothing more 
than mere sprinkling with poi- 
son or a fungicide and where it 
would be difficult to handle a 
wheeled outfit. They cost as 
much, however, as a well 
equipped barrel outfit and are in- 
capable of furnishing any ade- 
quate pressure for seriuuo spray- 
ing work, so they should be useu 
only where all that is required of 
them is low pressure work. 
Barrel Pumps. 
The second class consists of 
barrel outfits which range in 
price for the pump alone from 
about six to fifteen dollars. 
Their value increases much more 
rapidly than the price, as they in- 
crease in weight and size of air 
chamber. The lighter ones, with 
small sized air chambers and 
simple cylinders do fairly good 
work when new, but as the inside 
of the cylinder wears it is impos- 
sible to tighten them up and they 
then begin to leak and lose pres- 
sure. The heavier types, with 
long, heavy handles, large air 
chambers and cylinders with 
stuffing boxes around the piston, 
are very efficient machines and 
within the limits of their ca- 
pacity will do just as good work 
as the big power outfits. One of 
these heavy barrel sprayers 
A. very good Barrel pump. 
equipped with 30 feet of V 2 inch 
hose, a bamboo spray pole, a cut- 
off, an angle and a heavy nozzle, 
will handle 2 to 4 acres of orchard 
in first class shape, the total cost 
of the outfit amounting to about 
twenty dollars. By doubling 
the length of the hose, this may 
be used for spraying a small num- 
ber of tall trees. 
Double Acting Outfits. 
Double acting pumps range in 
price from 30 to 60 dollars. The 
heavier they are, the larger the 
air chamber, and the heavier and 
longer the handle, the more pres- 
sure they will deliver. By using 
a long suction hose, three or four 
barrels may be carried at one time 
and used alternately. 
Contrary to general supposi- 
tion, these pumps are capable of 
carrying only one lead of hose 
and maintaining a high pressure, 
where efficient nozzles are used. 
Such an outfit will care for 6 or 8 
acres of orchard and either this 
outfit or the larger barrel pumps 
may be equipped with a special 
device for spraying a number of 
rows of truck crops at one time. 
The Gasoline Power Outfit. 
This outfit involves an expendi- 
ture of 250 to 350 dollars when 
equipped with tank, truck and 
equipment, complete. For large 
orchards, cities or communities 
where there is considerable spray- 
ing, one of these outfits is a good 
investment. Oftentimes the same 
values can be obtained by using a 
gasoline engine in service for 
other work at other times but 
connecting to the double acting 
pump during the spraying season 
and thus materially reducing the 
cost of the equipment. The gaso- 
line outfits are capable of handl- 
ing only two leads of hose, where 
efficient nozzles are used, and 
should not be equipped with more. 
Anyone contemplating the pur- 
chase of one of these large outfits 
A double acting pump. Made by the 
Deming Pump Co. 
should write for special informa- 
tion and details of equipment. 
What to Buy. 
In general, buy the smallest 
type of equipment that will do 
