BUREAU OF ENTOMOLOGY AND PLANT QUARANTINE 3 
Bureau have consumed most of the time of the library staff. The inclusion in 
the Bureau of the chemical work on insecticides has expanded to some extern 
the work and scope of the library. Approximately 8,800 references relating to 
various phases of work on economic entomology have been added this year to 
the current index, which now numbers some 37,000 references, for 1930 36. Spe- 
cial lists of publications dealing with 20 different subjects have been prepared 
for the use of employees of the Bureau. These include references to such sub- 
jects as the responses of insects to radio waves, the liquid-bait sprays used for 
Lepidoptera, and the effect of hibernation and diapause on insects. About 50 
additions have been made to the collection of photographs of entomologists, 
which now totals approximately 2,700. The work of cataloging numerous books 
obtained in connection with the purchase of the Barnes collection of Lepidop- 
tera has received special attention, and arrangements have been made for the 
exchange, through the Department library, of duplicate copies of publications 
secured as a part of this purchase. This will make more readily available for 
the use of entomologists copies of the check lists of Lepidoptera of North Amer- 
ica and other contributions published by the late William Barnes and his asso- 
ciates, which had received only inadequate distribution at the time of Dr. 
Barnes' death. 
INSECT PEST SURVEY AND INFORMATION 
During the year the survey added to the permanent files on the distribution 
and abundance of insects 9,800 notes on American insect pests and 4,000 notes 
on foreign pests, bringing the total now available for consultation to 240,050. 
The monthly Insect Pest Survey Bulletin was augmented by supplements on The 
Colonization of Foreign Parasites of the European Corn Borer, Report on Status 
of the European Corn Borer in 1935, Hessian Fly Infestation at Harvest Time 
in 1935, and The Results of European Corn Borer Surveys in 1935. 
One hundred and two articles on entomological and quarantine subjects were 
released to the press, and 69 radio talks were put on the air. The preparation 
of film strips covered 15 additional subjects. Three motion pictures have been 
in the process of making, but none had been completed by June 30. An ex- 
hibit on the activities of the Bureau, to be shown at the Texas Centennial Expo- 
sition at Dallas, Tex., was planned and supervised, as well as a small exhibit 
for the annual meeting of the American Medical Association at Kansas City, Mo. 
Cooperative extension work in entomology was supervised under the direction 
of the Bureau and the Office of Cooperative Extension Work. Thirty-eight spe- 
cialists were employed to carry on this work. In addition to these. 17 additional 
entomologists were used in carrying out chinch bug and grasshopper control 
campaigns. 
Twelve numbers of the Bureau's monthly News Letter, comprising a total of 
297 pages, were issued. 
Approximately 130,000 publications were distributed, exclusive of those sent 
out on regular mailing lists and miscellaneous mimeographed material. 
FRUIT INSECT INVESTIGATIONS 
APPLE INSECTS 
The funds allotted for work on apple insects are still being devoted chiefly to 
investigations of the codling moth. The task of finding an effective and unob- 
jectionable substitute for lead arsenate or other fully effective means of control 
not requiring the use of poisonous insecticides is proving very difficult. 
In the spring of 1930 a station was established at Poughkeepsio, N. Y. in 
cooperation with the New York Agricultural Experiment Station, to study 
codling moth control under the conditions of light infestation that exist in 
eastern New York and the New England States, and where the residue problem 
at harvest time is complicated by the necessity for dealing with the apple 
maggot, which has formerly been controlled by midsummer applications of 
arsenicals. The work of two of the apple-insect stations. Vincennes, Intl. and 
Yakima, Wash., is carried on jointly by the Divisions of Fruit Insect Investi- 
gations and Insecticide Investigat Ions. 
In the Middle West and East, owing largely to climatic conditions, the level 
of codling moth population during the crop season of 1!>:!r, was lower than it has 
been for a number of years. The most encouraging development of the season 
of 1935 was the high degree of codling moth control obtained bv the ase of 
phenothiazine, sometimes referred to as thiodiphenvlamine. under conditions 
