fele) FUMIGATION METHODS 
the gas method without difficulty if the rules given 
herewith are carefully followed. 
Large outfits are so expensive it is desirable in 
many cases for the state, county, or local society to 
own the tents and other equipment. In California 
especially, where it is necessary to operate at night, 
these outfits are practically controlled by county and 
local organizations. ‘The number of persons necessary 
to operate a system of fumigators depends somewhat 
on the size of the trees and the number and kind of 
tents. One or two men introduce the chemicals, 
others look after the vessels, measure the acid and 
water, while others manipulate the tents. As soon as 
the tent is in place, the fumigator enters it, introduces 
the chemicals, withdraws quickly, closes the tent, and 
proceeds to the next tree. In many cases the assistant 
raises the edge of the tent, while the fumigator enters 
and drops it as soon as he comes out. The wagon 
containing the chemicals is then drawn to the next 
tree. The generator beneath the tree just fumigated 
is removed, and the contents poured on the ground near 
the trunk of the tree. The acid and water are meas- 
ured, carried to the next tent, and introduced, as shown 
in Fig. 45. Various appliances are used for carrying 
and handling the chemicals in an orchard in the east. 
A wheelbarrow or small hand-cart has been found very 
useful, as shown in Fig. 22. In other cases a small, 
table-like tray is used to carry the apparatus, as seen 
in Fig. 38. 
The location of an orchard and its freedom from 
dampness and fog must be considered. The ground, 
trees, and the leaves should be dry when fumigated. 
