December, ’20] 
MAXSON: SUGAR BEET WEBWORM 
469 
as inspectors. These men personally inspected and tested each spray 
machine in their territory and reported its condition to the entomolo¬ 
gist. 
Local Mechanical Department. Under the direction of the 
entomologist the local mechanical department of each factory repaired 
all old sprayers and set up all new ones. 
Local Field Force. The local field force at each factory consists 
of an agricultural superintendent and several field superintendents or 
field men. The local agricultural superintendent supervised the work 
in his territory. In doing this he followed the general instructions 
given by the general agriculturist and entomologist, using his own 
judgment in adapting these to his local conditions. 
Working under the agricultural superintendent the field men located 
infested fields and routed the spray machines in that part of the local 
territory under their charge. 
Repairing Farmer Owned Sprayers. During the early spring 
each field man was required to report the number of spray machines 
owned by farmers in his territory and their condition. 
A list of the needed repairs and repair parts was secured and the 
Sugar Company assisted the owners in securing these parts. Where 
the farmer so desired, machines were repaired by Sugar Company 
mechanics. In such cases the farmer was charged the actual cost of 
labor and material. 
Testing Spray Machines. After the local mechanics had over¬ 
hauled and repaired all old machines and set up all new ones each 
machine was tested by one of the inspectors mentioned above. 
Owing to there being several makes of spray machines employed 
and several types and sizes of nozzles used it was necessary to learn 
just how much spray material was applied per acre by each machine 
in order to properly mix the insecticide. This was determined by 
hauling the spray machines along a road or field border until a meas¬ 
ured amount of water was discharged through the nozzles. The 
distance traveled multiplied by the number of rows sprayed furnished 
the basis for computing the rate of application. In mixing the insecti¬ 
cide the quantity to be used per acre was mixed with the quantity of 
water applied per acre by the machine. All machines were tested 
out at 80 pounds pressure. 
Field Operations. Several methods were employed in handling 
local operations. The most successful are outlined below: 
Method No. 1. In the territories using this method a man who had 
assisted in overhauling and setting up machines was detailed as 
assistant to each field man. 
This trouble man, as he was called, was furnished with a Ford auto 
