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TROPICAL AND SUBTROPICAL INSECT INVESTIGATIONS 
C. L. Marlatt, In Charge. 















Ur. Marlatt recently visited Newport, R. I., to look over the experimental work 
Ming conducted by Mr. Dettmar W. Jones on the control of the European earwig 
ficula Salada 
TRUCK CROP AND STORED PRODUCT INSECT INVESTIGATIONS 
F. H. Chittenden, In Charge. 
mer. A. Bonequet, bacteriologist, was appointed July 16, 1916, as collabor- 
He has been engaged for some time in investigations of the curly-top infect- 
Berger beets in Southern California, one of his projects being wild vegetation 
Source of such infection. This is produced by the beet leafhopper (Eutettix 
a Baker). 
of. H. F. Wilson, formerly entomoligist at the Oregon Agricultural College 
ent Station, Corvallis, Oregon, now entomoligist at the College of Agriculture 
ine University of Wisconsin, Madison, has also been appointed collaborator. 
Charles E. Smith, field assistant at Baton Rouge, La., where he was engaged for 
ral months during the past two summers in assisting Mr. Thomas H. Jones in work 
ets injurious to truck crops, resigned June 30. 
y B. Bilis, who was temporarily engaged in assisting Mr. F. B. Milliken on 
set and stored-product insect problems has left the Department, his appoint- 
piring July 16. 
Joseph Manter, temporarily employed at Hayward, Calif., when a station was 
ned there in charge of Mr. Roy E. Campbell, resigned July 16, his appointment 
ing at that time. 
Phis branch of investigations has recently secured another greenhouse similar to 
erected on the Department grounds last year It will adjoin the first one. 
11 practically double the greenhouse acne assigned to the branch and will 
for additional extensive experiments on the control of insects affecting truck 
rown under coeeey Lt Ls proposed to institute an additional series of experi- 
ith regard to fumigation against such common pests as the greenhouse white ea 
aphides, greenhouse caterpillars, and others. 

