REPORT OF THE CHIEF OF THE BUREAU OF 
ENTOMOLOGY AND PLANT QUARANTINE, 
AGRICULTURAL RESEARCH 
ADMINISTRATION, 
1952 
United States Department of Agriculture, 
Washington. D. C. September 15. 1952. 
Dr. B. T. Shaw, 
Agricultural Research Administrator. 
Dear Dr. Shaw : Consolidation and reorientation of much of our 
administrative work on a regional basis was concluded during the 
year. This was accomplished with the least possible disturbance to 
our program activities. Some of the most serious insect infestations 
of the previous j 7 ear have been brought under control. Others have 
arisen to hamper crop production. Accomplishments of our research. 
control, and regulatory personnel are summarized in the attached re- 
port for the fiscal year ended June 30, 1952. 
Sincerely yours, 
Avery S. Hoyt. 
Chief. 
CONTENTS 
Page 
This year in brief 5 
Fruit and nut insects 8 
Citrus blackfly investigated 8 
Indian citrus blackfly parasites show remarkable build-up in 
Mexico 1 8 
Citrus blackfly surveys 8 
Sterilization of blackfly infested citrus studied in Mexico 9 
Wild citrus may be significant item in citrus blackfly infestation 
in Mexico 9 
Citrus blackfly control treatments effective 9 
Oriental fruit fly investigated 10 
Bioclimatic cabinets furnish valuable information on oriental 
fruit fly behavior 10 
Climate limits fruit fly development 11 
Traps determine intensity of fruit fly infestations 11 
Foreign parasite introduction program completed in Hawaii 11 
Effective insecticides for oriental fruit fly control developed 12 
Evaluation made of large-scale fruit fly control experiment on 
Lanai 12 
Low temperatuies studied as a means of ridding fruits and vege- 
tables of fruit fly infestation 12 
Mexican fruit fly control 13 
Parasites survive DDT sprays 13 
Miticides compared in orchards in Pacific Northwest 14 
Plum curculio control effective but complicated by objectionable 
residues 14 
Tree injury results in withdrawal of recommendation for peach borer 
control 14 
1 
