24 
FUMIGATION FOR THE CITRUS WHITE FLY. 
/V. 
hand corner, while the space (fig. 3, A) in the upper left-hand corner 
is left for the fumigator to set his lantern while he is writing down on 
the diagram the dimensions of the tented tree and the amount of 
dosage. It will he found convenient to attach a pencil to this board 
with a short string. 
The diagrams of the grove are prepared as shown in figures 4 and 5, 
representing a small grove set in regular and alternate rows respec- 
tively. When set with any form of regularity the individual trees 
may be conveniently referred to by numbering the rows in one direc- 
tion and lettering 
them in the other. 
Thus the first tree of 
row No. 1 is called 
1A, the second IB, 
etc., while in the 
other direction the 
trees are referred to 
as 2A, 3A, etc. In 
measuring the cir- 
cumference of. the 
t rees or in checking 
the correctness of 
the estimates based 
on pacing, a 75 or 
100 foot tape at- 
tached to a reel is 
needed. Water- 
tight barrels are re- 
quired for contain- 
ing the stock of wa- 
ter for use during 
w. 
9 
8 
7 
6 
e. 
X 
X 
4 
42-54 
24 
43-62 
29 
3 
39-47 
20 
40-49 
21 
X 
41-51 
23 
Z 
42-50 
23 
47-60 
34 
40-47 
20 
43-48 
24 
i 
32-38 
13 
42-50 
23 
i 
FlG. 5. Diagram of grove with alternating trees; first four rows in 
process of fumigation with four tents: three sets of trees fumigated, 
the tents being moved from south to north: X, X, X, trees missing. 
(Original.) 
the night. 
When weighing 
the cyanid a tin 
scoop is sometimes useful, and leather gloves should be provided 
for the one who does the weighing. When weighing of the cyanid 
i- to be done during the day five wooden boxes, with hinged covers, 
of a size that will conveniently fit into the cart, or one box with 
six compartments, should be constructed for use in holding paper 
hags of cyanid in doses of 1, 2, 5, 10, and 20 ounces, respectively. 
Kxperience will show the number and style of lanterns and torches 
required. A hammer, hatchet, and other incidentals can be procured 
as found uecessary. 
