20 
BULLETIN 1040, U. S. DEPARTMENT OE AGRICULTURE. 
1916 and proved so effective that several hundred were distributed 
beneath a tented citrus tree at Upland during the autumn of 1917. 
Some specimens successfully passed the winter and started breeding 
freely the following spring. The Insectary Branch of the California 
State Commission of Horticulture followed the writers* lead and has 
since distributed many thousands over the Upland district, with such 
successful returns that the work should be supported and continued. 
SUMMARY, 
(1) Ant control. This is most effectively accomplished by the use 
of a special arsenical poisoned sirup in small containers, one to each 
tree. Best results follow dis- 
tribution during the autumn or 
spring. 
(2) Trunk banding. Strips of 
burlap about 5 inches wide 
should be placed around each 
tree trunk, from February to 
April, to attract ovipositing fe- 
male mealybugs. 
(3) Removal and dipping of 
burlap bands in distillate. This 
should precede the trunk spray- 
ing. The bands should be dry 
when replaced after the trunk 
treatment. 
(4) Trunk treatment. Spray 
thoroughly with distillate-soap 
powder emulsion after the mealybugs have massed on the trunks 
and just before the eggs begin to hatch. This is usually during the 
latter part of Ma}-. 
(5) The propagation and distribution of Cryptolaemus montrou- 
zieri, Leucopis bella, Chrysopa spp., and Scymnus sordidus are to 
be recommended. 
Fig. 13. — Adult 
trousieri 
of Cryptolaemus 
Much enlarged. 
ADDITIONAL COPIES 
OF THIS PUBLICATION MAY BE PROCURED FROM 
THE SUPERINTENDENT OF DOCUMENTS 
GOVERNMENT PRINTING OFFICE 
WASHINGTON, D. C. 
AT 
5 CENTS PER COPY 
