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FRUIT INSECT INVESTIGATIONS 
Ay L. Quaintance, Associate Chief of Bureau, in Charge 
Oliver I. Snapp, in charge of peach insect investigations at Fort Valley, 
feos reports: "From. present indications more lubricating-oil emulsion will be 
used in the Georgia peach belt this year than lime sulphur. There has been a 
material increase in the. scale infestation in many sections of the State, large- 
ly because of favorable weather conditions. A large majority of the Georgia 
peach growers again used paradichlorobenzene for borer control. From some lo- 
calities come reports that all of the growers used the material." 
H. K. Plank, in charge of the New Orleans station, writes that Thos. fF. 
Catchings, of the laboratory, spent September 28 and 29 investigating the cam- 
phor scale and the cottony cushion scale in satsuma orange groves in the vicin- 
ity of Mobile and Grand Bay, Ala. 
Dr. Howard, in company with Dr. W. V. King and B. R. Coad, visited the 
camphor scale laboratory at New Orleans on October 15. 
W.-W. Yothers, shortly after the first of July, visited the camphor scale 
laboratory at New Orleans and the citrus regions in the lower Rio Grande Valley, 
also stopping at Phoenix. He spent some time in southern California in confer- 
ence with Professor Quayle, Mr. Woglum, and others, and visited the citrus dis- 
tricts in the general region of Sacramento. He recently returned to Florida by 
way of Washington. ; : 
Dr. F.. 8. Lathrop, who has been in charge of the Bureau's investigation 
of the blueberry maggot, with headquarters at Harrington, Maine, has gone to 
Sanford, Fla., where he will give attention to insect damage to the huckleberry 
and the blueberry, and make investigations in connection with the celery leaf- 
tyer work under way at. that place. 
OR, F. Sazama, who has been assisting Dr. Lathrop in blueberry maggot 
work at Harrington, Me., has been temporarily sent to Vincennes, Ind., where he 
will assist Dr. B. A. Porter in fruit insect investigations. 
Dr. C. H. Richardson, in cooperation with Dr. Edward L. Griffin, of. the 
Insecticide and Fungicide Laboratory, Bureau of Chemistry, is conducting in- 
vestigations 6n petroleum-oil insecticides. A cold-mixed lubricating-oil emm1— 
sion has been perfected which is economical, easy to prepare, and very resis- 
tant to hard water. A field method for determining the percentage of oil in 
emilsions, both concentrated and of strength smitable for spraying, has also 
been worked out, which it is believed will be of value to all who are experi- 
menting with oil sprays. R. ©. Burdette is assisting in this work. .Coopera- 
tive projects on oil insecticides have also been arranged with the Bureau of 
Chemistry by W. W. Yothers and E. J. Newcomer. Mr. Yothers is studying: the . 
effects of the various components of petroleum oils on citrus insects and foli- 
age, and Mr. Newcomer is investigating the preparation. and insecticidal action 
of miscible oils. . 
