172 
JOURNAL OF ECONOMIC ENTOMOLOGY 
[Vol. 13: 
The writer wishes to invite attention to the fact that in his judgment 
enough study has been given to various insects, especially apple 
aphis to indicate that insect habits on the coastal plain are somewhat 
different from the habits of the same species in other parts of the United 
States. The past year’s preliminary study of the codling moth in 
this area seems to bear out this general conclusion. This is not at all 
surprising because of climatic differences, especially as regards humid¬ 
ity and temperature. If this is so, it follows that any country-wide 
study of an injurious species should include the Atlantic Coastal Plain 
as one of the regional areas, the conditions of which must be determined. 
Examination of the results of work on codling moth has served to 
deepen a conviction that has been growing upon the writer for some 
years:—that in the past and at present the study of insects economically 
important over several regional areas has been carried out with alto¬ 
gether too little cooperation between state and between state and 
government agencies. This has resulted in sets of data which are very 
largely not comparable. If the other method had been taken it is 
reasonable to anticipate that the essential points in the codling moth 
control problem would now have been in hand. 
Conclusions 
In conclusion it should be said that: 
First, as shown by a single year’s investigation there are only two 
broods of codling moth in New Jersey; 
Second, the blossom fall spray does not appear in this study to have 
the preeminent importance which it has been shown to have in previous 
studies elsewhere in the country; 
Third, the sprays which come at the time the larvae of the first and 
second broods are entering the apples are not only of much greater 
importance than has hitherto been attributed to them, but are abso¬ 
lutely necessary to satisfactory control when the codling moth is pres¬ 
ent in as great abundance as is now the case in New Jersey and 
probably Delaware; 
Fourth, that portion of the Atlantic Coastal Plain comprised in the 
southern half of New Jersey and probably Delaware varies sufficiently 
so to modify the habits of economic species of insects coming within its 
range as to render the studies made of them elsewhere in the country 
only partially applicable to coastal plain conditions; 
Fifth, studies of country-wide economic species should be carried out 
on a regional basis under a plan which comprehends extensive and 
thorough-going cooperation between state and between state and 
government agencies. 
