December, ’23] 
HERBERT: CITRUS SPRAYING EQUIPMENT . 
495 
but all the larger growers and commercial sprayers are demanding the 
largest orchard sprayers on the market, such as the Friend AX A, the 
Bean Super-Giant, and the Hardie Mogul. The Friend is the favorite 
here, having the largest capacity, besides being able to carry a pressure 
of 350 pounds or more with a minimum amount of upkeep. Each of 
these machines has a capacity of 15 to 20 gallons per minute and throws 
ample material to take care of two or more guns. 
The sprayer when purchasing a newspraying outfit should not consider 
the initial cost alone, for with the cost of upkeep, the cheapest outfit is 
liable to more than balance the cost of the highest priced rig, without 
considering the aggravation and time lost from a poor machine. This 
applies particularly to the commercial sprayer, who must make every 
hour and dollar count for his season is short enough at best. The 
writer knows personally of a number of outfits requiring over $300.00 
for upkeep per year, wdiile more durable machines required only $10.00 
to $35.00 for the same period. 
Pressure 
No one should attempt to operate a machine which will not carry at 
least 300 pounds pressure. This amount will suffice on small to medium 
sized open trees, but the best results on large trees have been obtained 
from machines carrying 350 to 400 pounds. A 130 acre grove of large 
trees in the Redlands section was classed as a 99.6 percent kill on Citricola 
scale last season. This had been sprayed with two medium sized rigs, 
but these results were obtained only by the most diligent work under and 
outside the tree, the sprayers even using ladders to reach the tops. 
The same results could have been obtained much more easily by using a 
rig with high capacity and pressure. Moreover this is the only grove 
of large trees where the writer knows of any such kill with a small rig. 
There have been a great many kills of better than 99 percent obtained 
much more easily where large outfits were used. 
Spray Guns 
The old time rod and nozzles have been replaced practically entirely 
by spray guns. If there is any occasion where the gun is more efficient 
than the rod, it is in spraying citrus trees. With the proper amount of 
pressure, the gun will break the material up and carry it to the tops of 
the tallest treess, and still do it more economically than any rod and 
nozzle. One hears occasionally from an “old timer” that he could do 
the same work and use less material with a rod. True, it could be done 
well with a rod, but only with the expenditure of a greater amount of 
energy and fully as much material. The only reason the rod might use 
