i ve 
TRUCK-CROP INSECT INVESTIGATIONS 
J. E. Graf, Senior Entomologist, in Charge 
Dr. B. L. Richards, pathologist of the Utah Experiment Station, 
at Logan, visited the Bureau in the first week in January and discussed 
the injury caused to potatoes by Faraitrioza cockerelli (Sulc.), an injury 
which indicated the transmission of a disease. 
B. L. Boyden, Tampa, Fla., visited the Bureau January 6, where 
he discussed plans for closing the laboratory at Tampa preparatory to his 
transfer to the Federal Horticultural Board. After this transfer has 
been made he will give his attention to eradication of the date scale in 
the southwestern part of the United States. 
A. C. Morgan and S. E. Crumb, of the field laboratory at Clarks— 
ville, Tenn., visited the Bureau January 12 to discuss the readjustment 
of projects in connection with investigations of tobacco insects. Mr. 
Crumb remained in Washington until the end of January to do some museum 
and library work. 
Dr. F. W. Poos, of the Virginia Truck Experiment Station, at 
Norfolk, visited the Bureau January 16 and 17, and discussed his work 
on the potato tuber moth, 
In the second week in January Walter Carter, in charge of the 
field laboratory at Twin Falls, Idaho, visited Logan, Utah, where he 
made arrangements with the Utah Experiment Station for the continu- 
ance of the investigations of the sugar beet leafhopper. Mr. Carter 
then visited several points in California. At Riverside on January 
16 and 17 he discussed with Messrs. Carsner and Shapovalov the problem of 
disease resistance, and with Prof. Harry S. Smith, of the California 
Experiment Station, the matter of parasite introduction. At Spreckels 
he discussed with G. E. Eensel the ecology and control work of the sugar 
beet leafhopper in California. At Berkeley he conferred with Dr. H. H, 
P, Severin, of the University of California, on the forthcoming co- 
Operative expedition to Mexico and the islands off the coast of California 
in search of parasites of the sugar beet leafhopper. Mr. Carter also 
discussed with Doctors Swezey and Severin the work connected with the 
search for a causal organism of curly top of sugar beets. 
Dr. E. D. Ball, in charge of the celery leaf—tyer investigations 
for the Florida State Plant Board, at Sanford, visited the Bureau Jan= 
uary “7, when problems connected with the studies of the celery leaf— 
tyer were reviewed. 
R. E, McDonald, Entomologist of the Texas Department of Agricul- 
ture, Austin, visited Washington January 27.to 30, Although his principal 
interests were concerned with the Federal Horticultural Board's dis-— 
cussions of the pink boll worm, he found time to visit the Division of 
Truck-Crop Insect Investigations and discuss the problem of the sweet 
potato weevil in Texas. 
