18 
BULLETIN 1040, U. S. DEPARTMENT OF AGRICULTURE. 
acreage was banded with burlap in the spring of 1919. Of the area 
infested with the mealybug in that section all but 10 acres were 
sprayed according to the methods outlined, with excellent results 
throughout. The 10-acre orchard was left as a check for control by 
natural enemies. 
The ant control was handled partly by the growers themselves, 
partly by the citrus associations of which the orchardists were mem- 
bers, and partly by 
contract operators. 
The sirup was for the 
most part prepared 
by the citrus associ- 
ations, or purchased 
from druggists at a 
cost of $1.50 to $2 a 
gallon. The spice 
tin Avas the pre- 
ferred container. 
The average cost to 
the grower for ant 
control, including 
refilling where nec- 
essary, was ± to 6 
cents per tree. The 
cost of burlap band- 
Fig. 10. — Adult of Leucopis bella. Greatly enlarged. j no - averaged 2 cents 
to to 
per tree. The cost of trunk spraying A^aried. On dense, unpruned 
lemon trees, headed Ioav, spraying proved somewhat difficult and 
sIoav. The amount of material used on such trees Avas also greatest. 
High-headed orange trees with smooth trunks Avere most easily 
and effectiA^ely sprayed. 
These spray operations Avere conducted by the groAvers and com- 
mercial outfits and an a Average of 10 acres a day Avas coA T ered at a cost 
approximating the figures giA r en for the two demonstration plots, the 
cost being more or less proportional to Avhether the trees Avere Avell 
pruned and open or unpruned and difficult to spray. Work carried 
out by the OAvners themseh r es was for the most part thoroughly done. 
A feAv orchards Avere trunk-treated by hand. 
The general results of the control campaign of 1919 at Upland 
Avere A T ery gratifying. Orchards which had shoAvn seA^ere infesta- 
tions in the spring of 1919 were commercially clean in the spring 
of 1920. The reduction in grade or total loss of fruit from mealy- 
bugs had been" reduced to a negligible factor. Packing-house man- 
agers and groAvers Avere conA'inced that the citrophilus mealybug 
-was no longer a menace to their orchards and that the control of 
