
gaia 
Paradichlorobenzene-cottonsecd oil emulsions effective and safe in 
control of borers in peach nursery stock.--Mention has previously been 
made of satisfactory. results obtained by Oliver I. Snapp, in charge of 
the Fort Valley, Ga., laboratory, in the use of emulsions of cottonseed 
oil in which paradichlorobenzene has been dissolved, for the control of 
the peach borer (Aegeria exitiosa Say) in orchard trees of all ages. 
This work has now been. extended to the control of peach borers in nursery 
stock, a matter of special interest, now that this insect has been ac- 
cused of playing an important part in the transmission of the phoney dis- 
ease of peach. Spraying the base of the trees with emulsions of crude 
cottonseed oii carrying 1/16 to 1/8 ounce of paradichlorobenzene for each 
tree has given perfect control of the borers and no injury to the trees. 
This treatment is comparatively inexpensive also, as the materials cost 
only about O.e cent per tree. Mineral oil used in the same way has given 
satisfactory control of borers but has caused a little injury; the cotton- 
seed oil is therefore recommended as preferable... Emulsions of gasoline 
or kerosene in which the chemical hed been dissolved caused serious in- 
jury to the nursery stock. 
New Orleans laboratory moved to Wooster, Ohio.--The New Orleans field 
laboratory, which has been investigating the. control of the camphor scale 
and certain other insects, has been closed and a part of the work trans- 
ferred to Wooster, Ohio. In recent years the New Orleans laboratory has 
been devoting a great deal of its attention to a much-needed fundamental 
investigation of oil sprays. In order to broaden the field so as to in- 
clude many of the problems relating to deciduous fruit trees, it was de- 
cided to transfcr the work to’a’ more northern point. At Wooster quarters 
are being furnished by the Ohio Agricultural Ixperiment Station. The 
Space made available consists of a chemical laboratory, a biological lab- 
oratory, an office, and an inside insectary for breeding test insects 
during the winter season. The work is cooperative with the Bureau of 
Chemistry and Soils, and the program includes studies of mineral oils, 
pine oils, tar distillates, and the incorporation of added substances to 
increese tic toxicity of oil sprays. A. W. Cressman continues in charge 
of this work for the Bureau of Entomology, and L. H. Dawsey for the Bu- 
roau of Chanistry and Soils. 
JAPANESE AND ASIATIC BEETLES 
Lateral migration of grubs of the Japanese beetle under field con- 
Gitionus.--According to I. Ii. Hawley, Moorestown, N. J., "Tests previously 
reported showed that under greenhouse conditions third-instar grubs of 
Popillia japonica Newm. would travel at least 7 feet in 37 days, both in 
fallow soil and in soil covered with a good stand of grass. During the 
past season experiments have been under way in which natural field con- 
ditions were provided by using large cages on the laboratory grounds. 
Two plots, cach 24 feet square, were used, covered with 8-mesh screen. 
In one a good stand of grass was grown, while the other was left fallow. 
Late in September 500 healthy fielid-collected grubs were placed in a 
5-foot circular area in the center of each plot. At the end of 31 days 
the soil in one fourth of each plot was examined to determine the posi- 
