
i, OR 
: RE & By hes 
a MONTHLY LETTER OF THE BUREAU OF ENTOMOLOGY 4 9 \J34 ® 
UNITED STATES DEPARTMENT OF AGRICULTURE | U % *** oP: Same 
| . | 
Number 241 (Not for a Ttostton) June 30, 1334 
FRUIT. INSECTS 
Ethylene dichloride effective against peach borer, but ineffective 
against lesser borere~-Oliver I Snapp and J. Be. Thomson of the U. S. Peach 
Insect Laboratory at Fort Valley, Gas, report poor control of the lesser 
peach borer (Aegeria pictipes Ge & Re) from ethylene dichloride or ethylene 
dichloride emulsione This is believed to be due to poor penetration of the 
ethylene dichloride gas into the lesser peach borer burrows on peach limbse 
There was no tree injury from the treatments. Messrs. Snapp and Thomson 
report that the material is effective for the elimination of the major, or 
greater, peach borer (Aegeria exitiosa Say) from dig nursery stock, and also 
gives good results in controlling the major peach borer in orchard trees, 
Methods of conducting experiments in control of codling moth and ape 
berry mothe--The field experinentation conducted this season by the Fruit Ine 
sect Division in connection with the. spray residue problems, under both PWA | 
and regular funds, will yield sxtensive data to be analyzed and evaluated by 
the divisional staff of the Washington office. With the great increase of 
administrative matters pressing for attention, further help has teen found 
necessary, in order that the season's results as a whole may have the careful 
study they deservee Arrangements have therefore been made for the transfer 
of Ke We Babcock from the corn borer laboratory at Toledo, Ohio, to the ws: 
Washington office of the Fruit Insect Divisione Mre Babcock has in recent ~ 
years been very successful in developing methods for measuring corn borer 
infestation and in the analysis of experimental data, and is well qualified 
to undertake this new assignment. In order to familiarize himself with the 
problem of controlling the codling moth (Carpocapsa pomonella Le) and the 
grape berry moth (Polychrosis viteana Clem.), and experiments in connection 
with the same, Mr. Babcock is Visiting the different field stations in order 
to study the set-up for this season am to analyze data obtained in previous 
SCasOnSs It is. believed that his studies will also be of great value in 
the planning of future work, 
Leafhopper attack predisposes grape vines to winter injurye-=Ge he 
Runner, of the grape insect laboratory at Sandusky, Ohio, reports that the 
effect of injury to grape foliage caused by leafhoppers (Brythroneura comes. comes 
Say) during the season of 1933 is shom in more severe winter injury to 
grape buds by low temperatures in February 19346 The extremely low tempera~ 
tures of the past winter caused considerably injury to grape buds through+ 
out northern Ohio, especially with the Catawba variety, which is extensively 
grown in the Sandusky-Lake Erie Island areae A marked contrast has been 

