REPORT OF THE STATE ENTOMOLOGIST IQI2 13 
INJURIOUS INSECTS 
CODLING MOTH 
Carpocapsa pomonella Linn. 
Practical field work with the codling moth was continued the 
past season and the results of the previous three years of work 
very satisfactorily confirmed. The spraying of 1912 was confined to 
young and moderate sized Ben Davis trees on the farm of Thomas 
Albright, New Baltimore. A power sprayer was used and an effort 
made to do thorough work, yet the applications were by no means 
excessive. A check or unsprayed tree produced only 38.95 per cent 
of sound fruit, while those in the immediate vicinity and sprayed 
‘as described above, yielded from 97.53 to 99.53 per cent, or an aver- 
age of 98.69 per cent, of worm-free apples. The other plot similarly 
treated comprised larger trees and produced from 95.17 to 98.77 
per cent, or an average of 97.26 per cent, of sound fruit. Consid- 
ering that this spraying was done under adverse conditions and the 
yield of individual trees by no means excessive, the results are all 
that could be expected. These returns were checked by examina- 
tions of the yields from representative trees in the orchards of 
W. H. Hart, Poughkeepsie, and of Edward Van Alstyne, Kinder- 
hook. These trees were sprayed last spring in the ordinary practi- 
cal manner and with no expectation that any of the trees would 
later be selected for test purposes. In the orchard of Mr Hart, his 
northern spy trees produced from 97.87 to 98.77 per cent, or an 
average of 98.23 per cent, of sound fruit. Mr Van Alstyne’s trees, 
composed of Baldwins and greenings, yielded from 95.12 to 97.50 
per cent, or an average of 96.20 per cent, of worm free apples. 
None of these trees were sprayed more than once during the season 
with a poison, and the applications were made within the week or 
ten days necessary to secure the best results. It should be recalled, 
in this connection, that our earlier work has shown that sprayings 
made about three weeks after the blossoms fall are only about one- 
half as effective as the applications after the dropping of the blos- 
soms and before the calyx cup is closed. 
