April. ’20] 
HEADLEE: CODLING MOTH 
167 
This is not because these growers have not had the benefit of informa¬ 
tion gathered about this insect in the country at large, but because 
spraying methods as outlined by these studies have in most cases 
proven insufficient to handle the codling moth when it occurs in 
maximum numbers in that part of the Atlantic Coastal Plain above 
referred to. 
The writer has not been able to find any thorough-going studies of 
this insect in this region of the country and there is reason to suspect 
that its habits differ materially from those exhibited in parts of the 
United States where careful studies have been made. Furthermore the 
rainfall in this portion of the Atlantic Coastal Plain is large, especially 
abundant during the first half of the apple growing season and conse¬ 
quently spraying materials stick less well to the foliage and fruit of 
apple. 
It is true that a good many individual orchardists in New Jersey 
have been able to prevent the codling moth from doing their crops 
serious harm, but in all cases with which the writer is familiar where 
these results have been obtained, the coating of spray materials has 
been maintained year after year from the dropping of the petals 
through the first half of the growing season. 
With these facts in mind an investigation of the codling moth with 
special reference to the entrance of the fruit by the larvae was under¬ 
taken at the beginning of last summer. Two orchards were selected, 
one at Maple Shade in Burlington County about 5 miles northeast of 
the city of Camden and the other at Glassboro in Gloucester County 
about 20 miles southeast of Camden. Each orchard was located in a 
large orcharding section. It was anticipated that the difference in 
location was sufficient to produce a slight difference in the life cycle of 
the insect, but the study showed distinctly that the seasonal cycle in 
each place was practically identical. The work at these two places 
was checked with observations made at New Brunswick. There ap¬ 
pears to exist between the life cycle of the codling moth at New Bruns¬ 
wick on the one hand and Maple Shade and Glassboro on the other 
hand, a difference of about one week. At Maple Shade and Glassboro 
the adult moths began emerging about May 3, reached their maximum 
about June 1 and ceased about June 12. The second brood began 
emerging about July 8, reached maximum about July 29 and ceased 
September 1. The first brood larvae began entering the apples about 
June 1, reached maximum about June 25 and ceased about July 8. The 
second brood larvae began entrance about July 25, reached maximum 
about August 11 and ceased about September 15. The apple bloom 
in general covered a period of nearly two weeks, the blossoms falling off 
the trees about May 3. From the falling of the petals until the begin- 
