I IO 
Psyche 
[June-September 
A ppendix A 
[Data furnished by Plant Pest Control Division, Agricultural 
Research Service, August 25, 1961.] 
SUMMARY OF ACREAGE SPRAYED FOR GYPSY MOTH 
CONTROL, SUPRESSION AND ERADICATION 
(All DDT Except As Noted) 
Application 
Application 
By Ground 
By Aircraft 
Equipment 
Totals 
(Acres) 
(Acres) 
(Acres) 
1945 
5,103 
1,092 
6,195 
1946 
62,201 
19,427 
81,628 
1947 
106,677 
56,932 
163,609 
1948 
212,260 
53,650 
265,910 
1949 
390,576 
34,239 
424,815 
1950 
582,895 
17,205 
600,100 
1951 
177,713 
2,499 
180,212 
1952 
202,109 
15,032 
217,141 
1953 
179,451 
6,970 
186,421 
1954 
i,37Ei99 
29,817 
1,401,016 
1955 
1,083,169 
25,129 
1,108,298 
1956 
926,073 
I5,39i 
941,464 
1957 
3,395,248 
27,695 
3,422,943 
1958 
516,150 
18,426 
534,576 
1959 
115,078" 
35,343 
150,421 
i960 
65,538 2 
33,369 
98,907 
1961 
141,270 s 
i9,583 4 
160,853 
Totals 
9,532,710 
411,799 
9,944,509 
By Aircraft 
By Ground Equipment 
1959 1 
DDT 29,518 acres 
Sevin 85,560 ” 
All DDT 
115,078 acres 
I960 2 
DDT 54,103 acres 
Sevin 11,435 ” 
All DDT 
65,538 acres 
1961 s 
DDT 104,770 acres 
4 DDT 
19,342 acres 
Sevin 30,000 ” 
Sevin 
241 ” 
Methoxychlor 6,500 ” 
19,583 acres 
141,270 acres 
