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1 LIBRARY 
' (f STATE PLANT BOARD 
REPORT OF THE CHIEF OF THE BUREAU OF ENTO- 
MOLOGY AND PLANT QUARANTINE, 1935 
V 
United States Department of Agriculture, 
Bureau of Entomology and Plant Quarantine, 
Washington, D. C, September 16, 1935. 
Hon. Henry A. Wallace, 
Secretary of Agriculture. 
Dear Mr. Secretary: I submit herewith a report of the work of 
the Bureau of Entomology and Plant Quarantine for the fiscal year 
ended June 30, 1935. 
Sincerely yours, 
I o Lee A. Strong, Chief. 
INTRODUCTION 
In accord with the reorganization directed by the Secretary and approved by 
Congress, the investigational work on insects previously carried on in the 
Bureau of Entomology and the activities concerned with control and eradica- 
tion of plant pests and the enforcement of plant quarantines previously car- 
ried on in the Bureau of Plant Quarantine, together with the functions con- 
cerned with the control and eradication of plant diseases directed by the 
Bureau of Plant Industry, were consolidated at the beginning of the fiscal 
year into the newly created Bureau of Entomology and Plant Quarantine. 
Effective September 1, the chemical work on insecticides and fungicides pre- 
viously carried on in the Bureau of Chemistry and Soils was transferred, by 
order of the Secretary, to the Bureau of Entomology and Plant Quarantine. 
These investigations on the chemistry of insecticides continued under the 
direction of R. C. Roark as leader of the Division of Insecticide Investigations. 
The unfortunate and untimely death of Karl F. Kellerman, who had charge 
of the Division of Plant Disease Control of the Bureau of Entomology, was 
followed by the reassignment of certain activities previously carried on in that 
unit. Stanley B. Fracker, who had been in charge of the Division of Domestic 
Plant Quarantines of the Bureau of Plant Quarantine, was designated as 
leader of the Division of Plant Disease Control and the scope of the Division 
restricted to work concerned with the control and prevention of spread of 
white pine blister rust and black stem rust of small grains. B. M. Gaddis was 
placed in charge of the Division of Domestic Plant Quarantines and the scope 
of the Division enlarged to include activities on the control and prevention 
of spread of the phony peach disease and citrus canker. The field direction 
of the work on the eradication of the Dutch elm disease was assigned to 
L. H. Worthley, who continued as field leader in charge of work on control 
and prevention of spread of the Japanese beetle and certification of products 
to meet the requirements of Federal and State quarantines on this pest, the 
gypsy, brown-tail, and satin moths, and the European corn borer. Investiga- 
tions on the physiology and toxicology of insects, handled as a unit in the 
Bureau of Entomology, were consolidated with those concerned with the com- 
mercial application of control measures in the Bureau of Plant Quarantine, 
under the direction of L. A. Hawkins. The service and investigational work 
on insects attacking shade trees was assigned to the Division of Forest Insect 
Investigations. 
During the fiscal year the regular and special activities concerned with the 
control and prevention of spread of the gypsy moth, the eradication of bar- 
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