EXTO.MOI-OGY AND PLANT QUARANTINE 
13 
•There were six other scattered locations where beetles were caught in numbers, 
and a scattering of single catches. Dearborn reported a one-beetle first-record 
infestation. Results in five other Michigan cities were negative. 
There was a drastic reduction in the infestation at St. Louis, Mo. Whereas 
1,351 beetles were caught in 1934, and 1,232 in 1935, this year's catch was 
reduced to 88 beetles. Of this total, only 14 came from the extensive area 
treated in 1934 and 9 of these came from two adjoining blocks in the center 
of the treated area. This amounts to a 99-percent reduction in beetle popula- 
tion in treated sections. In blocks treated for the first time in 1935, the 
catches totaled 59 beetles in 4 blocks. This represents a reduction of approxi- 
mately 85 percent. Most of the 15 remaining beetles were taken in blocks 
contig\ious to previously treated areas. As fast as beetles were trapped this 
year in unpoisoned sections, lead arsenate was applied. No beetles were 
caught in traps distributed in five other Missouri communities. 
Traps were operated in four Kansas cities this year with negative results. 
Placement of traps in this State was largely occasioned by the erroneous 
report of the finding of a Japanese beetle near Manhattan early in May. 
Early -season trapping activities in 1937 began with the placement of traps 
in ]Miami. Fla., on April 21. Trapping was completed before the end of the 
fiscal year in Mobile, Ala., in five cities in Florida, in two localities in Georgia^ 
in New Orleans, La., and in two nonregulated communities in South Carolina. 
At the end of the year traps were in operation in 231 cities and towns in 16- 
States. 
Trap captures recorded during May and June 1937 included 1 beetle at 
Atlanta, Ga. ; 160 beetles at Greensboro ; 126 at Winston-Salem ; 36 at Spencer ; 
35 at East Spencer, and small captures at five other communities in North Caro- 
lina ; 8 at Marietta and 3 at Gallipolis, Ohio ; 7 at Charlottesvile, Va. ; and 2 
at Charleston, S. C. The find at Atlanta, Ga., was a first record ; the 
others were survivals of previously determined infestations. A first-record 
collection of 75() beetles at the George Washington Birthplace National Monu- 
ment at Wakefield, Va., was reported on June 19. 
SUPPRESSIVE MEASURES 
With the extent of the Chicago infestations as well defined as could be 
accomplished in one season, the Illinois officials were in a position to inaugurate 
a control program in the city. Approximately 130 acres were sprayed with 
lead arsenate at the usual dosage of 1,000 pounds per acre. Treatment of 95 
acres was accomplished between August 24 and November 16, 1936. Operations 
were resumed on May 6, 1937, and treating of the remaining 35 acres was 
accomplished by June 11. Lead arsenate and labor for its application were 
supplied from a S17.000 State fund. This Bureau furnished a supervisor, two 
sprayers and operators. Two spray outfits borrowed from the Chicago Park 
Department were utilized. Illinois State officials and Chicago municipal 
officials cooperated fully in this control work. In addition the State main- 
tains an intrastate quarantine to restrict the movement of host plants from 
infested sections. This quarantine was revised effective February 1, 1937, 
to add the additional infestations disclosed by the 1936 trapping. 
At the conclusion of the seasons' trapping in Detroit, Mich., treatment of 
118 acres was begun. The Works Progress Administration, State, and city, 
furnished all items except supervision, which was furnished by this Bureau. 
Between October 6 and November 6, 1936, lead arsenate was sprayed on 48 
acres; the remaining 70 acres were treated between April 6 and May 21, 1937. 
Soil insecticide application in Detroit extended to all infested sections in the 
southeastern part of the city, to those blocks in which more than one beetle 
was found, and to most of tlie single-beetle finds. 
In St. Louis, Mo., 61 acres were treated ; 26 of these were in the infestation 
areas of 1934 and 1935. The dosage was reduced to 500 pounds per acre on 
two adjoining blocks in the center of an area treated in 1934. In addition, 
13 acres in scattered locations in the area sprayed in 1934 were re-treated at 
normal dosage. As fast as beetles were trapped this year in unpoisoned 
sections, lead ar.senate was applied. The Federal Bureau, the State of 
Missouri, the city of St. Louis, and the Works Progress Administration coop- 
erated in this program. The Bureau furnished two high-pressure sprayers, 
one operator, and a general supervisor. The State furnished a foreman to 
assist in the work and sponsored the W. P. A. project through which the 
lead arsenate and labor were secured. Incidental supplies were furnished by 
the city. 
