3f5 he 
incidence of disease.--In connection with the grub surveys, records. 
are made by H. Fox and T. N. Dobbins of all dead and obviously diseased 
larvae found. The following table gives the summarized record for Septem- 
ber and October? 
Percentage of Dead and Obviously Diseased Individual Larvae 
ee Merchant—- Moores- Tavis- Lippincott Jenkin- Phil- Torres- Gen'l 
Periods ville’ _towmm _tock _Pasture town Rydal mont dale. Av. 
; ‘ a . 
Meoept. 1-15 0.2 0 a4 0.8 0 Oy 7am a alg 
mo-50 «= 8.7 a bes 6 ise? di: ey. fog Om Wn che eM epee bine 
ES Gs ee 0.6 5.4 o.4 a a ook SRST Bee Red 
16-31 5.0 2.4 Gip 2.6 ape! 5.5 6.4- 45; 5 cm 
lgased on total number of cases, not the collective averages: of all stations. 
Control of the adult beetle means of mechanital traps.-—-F.-W. 
Metzger, Moorestown, submits a report covering the work with traps in the 
blueberry plantations at Whitesbog, N. J., during the past summer which is 
summarized as follows: In 1953 nearly 1,300,000 beetles were captured in 
150 traps located around the blueberry field at Whitesbog, N. J. The 
heaviest infestation was located at Tranquillity field. The traps did not 
appear to attract beetles into the blueberry fields from any considerable 
distance. The infestation at Vhitesbog was not greater than at several. 
other locations in the pine barrens. The beetle caused no serious injury 
to fruit and damage to foliage was severe only in sections of Tranquillity 
y and-Union fields. The reason for the heavy infestation around Tranquillity 
field is not apparent. The work should be continued at this locality for 
several seasons in order to obtain comparative data regarding beetle 
abundance. 
Treatment of evergreen and deciduous nursery stock in the field to 
a a a 2 ee ee 
Moorestown, have completed the remular fall survey to determine grub in- 
festation in the four’ plots containing a variety of stock commonly grown in 
commercial nurseries in. this territory. These plots were laid out and 
treated in 1929, the plants contained in them having originally been planted 
as seedlings. Each spring the soil in the treated plots has been analyzed 
and enough lead arsenate added to restore the original concentration, fol- 
lowing exactly in this respect the procedure required by the Bureau of 
Plant Quarantine of nurseries maintaining a certified status. Results of 
the surveys this fall indicated that apparently the treatments as applied 
are still completely effective in eliminating larvae from the soil of the 
treated plots. The results are given in the following tuble: 
Lead arsenate Larvae per 
Plot No. per acre 100, sq.ft. 
Pounds Number 
l---- - 0 tise 
Qn 1,000 0 
S3---- - 1,500 0 
4--~-- - € 000 0 
