IH'RKAr OF KNTOMOLOUY AND PLANT QUARANTINE 
39 
agencies, the Forest Service and Soil Conservation Service of the De- 
partment of Agriculture, and the National Park Service and the Office 
of Indian Affairs of the Department of the Interior. The accomplish- 
ments summarized in this report include the results of the combined 
efforts of the Bureau and cooperating agencies. 
During the calendar year 1938, 98.740,837 currant and gooseberry 
plants (Ribes) were dest roved on white pine foresl areas in the United 
States totaling ii.*J34. ( s49 acres. The treated acreage includes 1,547,426 
acres on which only initial work was done and <'>s7.4l':> thai were re- 
worked. The reworked acreage consisted of areas on which the Ribes 
were originally so numerous that it was necessary to go over them 
one or more times subsequently. This work is done at periodic inter- 
vals to maintain control conditions by destroying Ribes thai have de- 
veloped from seeds or sprouts and attained sufficient size to endanger 
the pines. Usually only portions of initially worked areas require 
two or more workings. 
A large proportion of the Ribes eradication work has been carried 
on with relief labor. During the year this work provided 639,7.VJ man- 
days of employment. The labor used by all cooperating agencies 
included 15,392 different individuals, of whom 6,892 were relief labor- 
ers, 6.657 C. C. C. enrollees. and 1.843 temporary employees of the De- 
partment and of cooperating State and local agencies. Where the 
work is in remote forest areas it is necessary to subsist the men in 
camps. Men from 298 camps were assigned to this work. Of these 
camps, 50 were relief-labor camps and 29 were occupied by temporary 
employees of the Department and cooperating agencies. Practically 
all these camps were on forest areas in the western white pine and 
sugar pine regions. In addition. C. C. C. enrollees in varying numbers 
were assigned to blister-rust control work from 219 camps, a large 
proportion of which were located in the Eastern States. The details 
of the Ribes eradication work are given in table 7. 
Table 7. — Ribes eradication work during the calendar year 1938 
Region 
Initial 
eradica- 
tion 
Reeradi- 
cation 
Total 
initial 
eradication 
and 
reeradi- 
cation ' 
Effective 
labor 
Ribes 
destroyed 
Acres 
330, 705 
663, 442 
405. 518 
78,201 
69, 379 
181 
.-teres 
410.864 
71.566 
70,295 
92, 562 
m. 174 
1,962 
Acres 
741, 569 
735, 008 
475, 813 
170. 763 
109. 553 
2,143 
Man -days 
203, 943 
40,828 
79, 563 
195, 364 
119, 258 
796 
Xh mber 
13,821,861 
Southern Appalachian States . .. 
North Central states 
Western white pine States (Idaho, Montana, 
Washington). ... . . 
18, 700, 421 
38, 21 
Sugar pine States (California and Oregon) 
Rocky Mountain States (Colorado and Wyo- 
23, 093, 653 
108, 690 
Total . 
1, 547. 426 
687, 423 
2, 234. 849 
639. 752 
98, 740, 837 
1 Includes work of cooperating Federal, State, and local agencies. 
Of the acreage reported above, about two-thirds, or L,530,703 acres, 
was worked by eradication crews paid from allotments of emergency- 
relief funds to the Bureau and to the Foresl Service. The C. C. C. 
enrollees covered 487,542 acre-, and the remaining 216,604 acres were 
worked by temporary employees of the Department and other co- 
operating agencies. Numerous States and townships provided appro- 
