34 A.\M AL Ki:roK rs of dkpau t.mkn'J' of A(iui<T"LTUKK. vxn 
Tabli: 11. — Ribes eradication opcrationsi for the calendar year 103G 
Region 
Area covered 
Effective 
labor " 
Ribes de- 
stroyed 
InitiAl 
Rework of 
areas cover- 
ed 1 or 
more times 
previously 
Total initial 
and rework 
Southern Appalachian States 
Lake States 
Western white pine (Idaho, Montana. 
Washington, including Mount Rainier).. 
Sugar pine (California and Oregon; 
Rocky Mountain States (Colorado and 
Wyoming) 
Acres 
1.048.305 
1, 169, 073 
628. 214 
297, 781 
179, 163 
17, 643 
Acres 
730,073 
244, 196 
.56,416 
16,043 
11, 159 
Acres 
1, 784, 378 
1,413,269 
684.630 
313, 824 
190,322 
17. 643 
Man -day* 
627, 674 
44,717 
190.929 
214.868 
90,686 
6. 847 
Xumber 
S5. 804. 474 
7, 741,501 
5.5,415, 237 
27, 675, 865 
837,489 
Total 
3, 340, 179 
1,063,887 
4.404.066 
1, 075, 621 
203,217,239 
• Reported as efTective 8-hour man-days; the time actually worked ranged from 6 to 8 hours per day. 
OVER 10,000,000 ACRES OF PINE NOW UNDER PROTECTION FROM BLISTER RUST 
The control work is aimed at protecting forest areas containing a sufficient 
stocking of white pine to produce a good crop of tim!)er at maturity and 
making those areas safe for the conlinucd production of white pine. Ac- 
cordingly, in selecting forest tracts to be included in the control areas, i)ref- 
crence is given to the better sites and more valuable stands of young growth. 
It will be noted from table 12 that initial protection through Ribes eradica- 
tion has now been given to 18,572,799 acres of control areas. This has resulted 
in the protection of some 10.000,000 acres of pine forest. Of the control area, 
3,200,721 acres have been reworked. This protectiou has been accomplished 
during the past 19 years through the destruction of 750,002.550 Ribes. 
Tarle 12. — Status of wltitc pine blister ru.st control on Dec. 31. 1030 
• 
Region 
Total pine 
area of suf- 
ficient val- 
ue to justi- 
fy protec- 
tion 1 
Control 
area, in- 
cluding 
border 
zones ' 
Work accomplished 1918-36 
Initially 
protected 
control 
area 
Rework 
areas sub- 
sequent 
to initial 
protection 
Effective 
labor' 
Riba 
destroyed 
Northeastern States 
Southern Appalachian States 
Acres 
7. VS7, 127 
1,275, Obi 
1,254.394 
2,710. 129 
2, 200,316 
394,548 
Acres 
12,572, 879 
3,831.204 
4, 260. 757 
2,710, 129 
2, 200. 316 
394. 548 

Acres 
11, •221. 205 
3, 347, 745 
1,796.831 
1,625,712 
555,280 
28,026 
Acres 
2, 678. 986 
290.739 
107. 673 
79.097 
44. -226 
Man-days 
1.905.813 
105.807 
585, 545 
1, 249. 539 
243. 749 
9.056 
Xumbfr 
217,255.718 
12.624.012 
152.381.410 
301,SS6. 409 
71.443. 579 
1.071.422 
Western white-pine area 
Sugar-pine area 
Rocky Mountain States 
Total 
15, 501, 595 
25, 969, 833 
18,572,799 13,200,721 
i 
4.099,509 
756, 662.550 
' Figures on pine and control areas are repeated from the 1930 report and are lower than will be shown 
after pre-eradication surveys now in progress are completed. 
• Reported as effective 8-hour man-days; the time actually worked ranged from 6 to 8 hours per day. 
In lalilc 12 lh(^ ;icr(>age of pine urea and of vontrol i\rv:\ is r(»p»>Mt(Ml from 
(he ligurcs given in the last annual report. Surh pim^ inapi)ing as b:is been 
carried on dtiring the past yi^ir indicates thnt these total .McreMge figures are 
somewhat too low. The remaining control area which should l)e covered is, 
acr«»rdingly, considerably gre.Mter than the dilTi'rence between the acreages 
of tin* control areas ancl the initially protected ;neas, as shown in the table, 
would indicate. It is anticip.Mted tluit during the tis<«:il year I'.K^S tlie pine 
and <-ontrol-area mapping i)ro.ject will have made sutlicient ])rogress so that 
tin- first two <<ilunins of tbis t.-ibl-' can be bionuht up to d;it»> in the next 
annual report. 
