
Z1S 
STORED-PRODUCT INSECTS 
E. A. Back, in Charge 
Perez Simmons and Dwight F. Barnes attended the Twenty-third 
Annual Meeting of the Dried Fruit Association of California, held at Del-— 
monte, February 9 to 10. Mr. Simmons read a paper entitled, "Dried fruit 
industry infestation problems." 
On January 13 Dr. Back gave an informal illustrated talk on clothes 
moths before the Rug Cleaners Institute of America, during its convention 
held in the New Yorker Hotel, New York City. 
Frank G. Hinman, a graduate of the Montana State College, was 
appointed Junior Entomologist, January 16, 1931, and has been assigned 
to investigations of the pea weevil, with headquarters at Corvallis, 
Oreg. 
A public-service patent covering the use of ethylene oxide as 
a fumigant was granted on February 3 to Dr. R. T. Cotton of this: Divie 
Sion, and to Dr. R. C. Roark of the Insecticide Division, Bureau of 
Chemistry and Soils, as representatives of the Department of Agricul— 
ture. 
Through the courtesy of Laurel Duval, Chief Grain Inspector of 
the New York Produce Exchange, the Bureau has had the Opportunity to 
cooperate in experiments in fumigating wheat with a mixture of ethylene 
oxide and carbon dioxide. In these experiments instead of using dry ice 
as a source of carbon dioxide and introducing the mixture into the grain 
as it enters the bin, in accordance with the method of procedure already 
published upon, the fumigating mixture was forced from cylinders into the 
grain column through a system of pipes and nozzles with which the bin was 
equipped. Dr. Cotton, who represented the Bureau during these experi- 
ments on February 3 to February 25, states that the results were very 
promising. 
On February 12 A. W. Morrill, jr., gave a fifteen-minute talk on 
"Termites and their control," ata meeting of the Castillieja Nature Club 
of Fresno. The talk was based on his personal experiences with the prob— 
lem as gained in and about Los Angeles before he entered the services of 
the Bureau. 
On February 20 C. K. Fisher of the bean weevil laboratory at 
‘Modesto, and Messrs. Simmons, Barnes, and Morrill, of the dried—fruit 
insect laboratory, at Fresno, attended the meetings of the California 
Entomological Society, held at the Modesto General College, Modesto, 
Calif. Mr. Fisher read a paper on "The bean weevil situation in Cal- 
ifornia." Mr. Essig was elected president of the society for the com— 
ing year. 
