August, ’24] headlee: gipsy moth fight in new jersey 439 
cause he believes that your desire for information concerning the war¬ 
fare against the gipsy moth in New Jersey is probably very similar to 
his own he will confine his statement of data to results and to expendi¬ 
tures. 
Table No. 1 
Year 
Size of 
No. of 
No. of 
No. of 
No. of 
No. of 
No. of gipsy moth 
main area 
in 
sq. miles 
colonies 
egg masses 
areas 
outside 
main area 
colonies 
egg masses 
infests found on 
imports 
untreated egg 
masses or larvae 
1920-’21 
500 
855 
3,003,039 
15 
6 
40 
1921-’22 
500 
216 
909 
15 
0 
0 
12 
1922-’23 
250 
98 
1,182 
0 
0 
0 
14 
1923-’24*25% scout’d 26 
353 
0 
0 
0 
2 
^Report to December 12, 1923. 
Table No. 1 shows that in the course of the three completed years of 
warfare all outlying infestations of gipsy moth have been extermina¬ 
ted, that the original five hundred square mile area of scattered infes¬ 
tation has been cut to about two hundred and fifty square miles, that 
each year has seen a large reduction of the number of colonies within 
the main area and that the extermination of the insect within this area 
looks to be practicable. 
This table also shows that a menace to the extermination of the 
gipsy moth in New Jersey exists in the form of infestations being 
brought into New Jersey on imported products. It happens that these 
products are exclusively, in the instances where the infestations have 
been found, composed of nursery stock. 
Year 
Total 
Table No. 2 
Funds 
Federal 
State 
Private 
1920-’21 
259,495.04 
122,495.04 
112,000.00 
25,000.00 
1921-’22 
226,572.61 
101,672.61 
125,000.00 
1922-’23 
292,267.66 
167,267.66 
125,000.00 
1923-’24 
? 
? 
125,000.00 
Table No. 2 serves to show the expenditures and the distribution of 
source among federal, state and private agencies. The sums recorded in 
this table are large, but the nature of the work of extermination is 
such apparently as to forbid the use of smaller sums. 
The gipsy moth problem cannot safely be considered from the stand¬ 
point of one state alone. If it is granted that the gipsy moth may be 
exterminated in New Jersey there is absolute certainty of reinfestation 
unless other infestations from which gipsy moth may be carried into 
that state are considered and the problems involved in preventing this 
transportation of infestation met and solved. 
