CONTROL OF THE CITROPHILUS MEALYBUG. 13 
readily collected under the bands preparatory to oviposition. 
(Fig- 7.) 
The success of burlap bands as used on the demonstration plot led 
the growers throughout the infested area to adopt the practice. This 
jT^j necessitated a large supply of burlap bands and the problem was 
solved by buying the burlap of 30-inch width in bolts of about 100 
yards. The bolts were cut at a printing office under a large paper 
knife into six rolls, 5 inches in width, which could readily be carried 
into the orchard and cut in appropriate lengths for individual trees. 
The ends of each band were fastened over a 4d finishing nail driven 
into the trunk of the tree. The average orchard of 900 trees was 
banded with one full bolt of burlap. The average cost in 1919 was 
as follows : 
\ 1 roll burlap (100 yards) $12.60 
f . Cutting 1.00 
Nails . 15 
Labor (1 man, 1 day) _• 3.00 
16. 75 
Cost per tree, approximately $0.02. 
During April and May insects continued to descend in great 
numbers, the burlap bands proving a center of attraction. In cases 
of light infestation the majority of the descending insects would set- 
tle beneath the band, and this was particularly true on smooth- 
barked orange trees. (Fig. 8.) Lemon trees with the more irregu- 
lar trunks and depressions where the main branches join the trunks 
offered favored places for the mealybugs to settle, although even 
these seemed less favored by them than the bands. By the latter 
part of May hatching started, following which the larvae migrated 
back to the foliage and fruit on the tree. Before this happened the 
bands were removed and dipped in an effective insecticide, usually 
pure petroleum distillate, and the trunks were then sprayed. 
Spraying. 
Spraying operations on the first 10 acres were conducted on May 
23 and 24, and on June 6 and 7 on the second 10 acres. Only the 
main limbs and trunks were sprayed and for this a petroleum dis- 
tillate-soap emulsion applied with a power sprayer at 150 pounds 
pressure proved most satisfactory. Two leads of hose with angled 
Bordeaux nozzles were used. The burlap bands were removed and 
thoroughly sprayed as the trunks were being sprayed. The formula 
used was as follows : 
Distillate 28° to 30° B gallons__ 10 
Soap powder pounds 20 
Water to make gallons— 200 
If a lighter oil, as stove distillate, is used, the amount should be increased to 
15 gallons. A good agitator is necessary in mixing the spray. After a few 
