34 ANNUAL REPORTS OF DEPAHTMBN3 Off ACKKULill . 
peak of ill'- summer season, following which the Dumber was reduced to 
about :;<► for the second quarter. With organization of be sanitation work 
early in 1935 the permanent force was Increased to around 
INFORMATIONAL ACTIVITIES 
Publication in March of a 4-page circular, The Dutch Kim Disease Eradi- 
cation Project: Federal, State, and Local Cooperation, assisted materially in 
responding t<> the hundreds of communicatioi d from Individua a 
city and town officials, garden clubs, and civic organizations expressing a lively 
interest in combating the disease DOW threatening the American elm. Circu- 
lars or bulletins were issued on the subject by the New Jersey and Connecti- 
cut Agricultural Experiment Stations and the New York Stale Colleg 
Agriculture. There has been a constant demand for educational mounts show- 
ing the characteristic symptoms of the disease and specimens of its principal 
known insect vector. This has been met by distribution of mounts coat, 
well-labeled specimens of sterilized (dm weed showing characteristic streaking, 
together with specimens of Scolytus muUi&tricrtus Marsh, and examples of this 
beetle's engravings 
WHITE PINE BLISTER RUST CONTROL 
As a result of an allotment of funds by the Public Works Administration in 
August 1933 and the assignment of a large amount of Labor from the Civilian 
Conservation Corps, mere extensive areas of white pine were given pro;, 
against blister rust during the past year than in any similar period -i;.' • 
work was begun about IS years ago. 
Control measures consist of destroying currant and gooseberry plants 
{Ribes) growing in or mar the pine stands, and Local protection by this means 
is effective. Regardless of the intensity of the disease in the vicinity, blister 
rust cannot attack pine if then' are no currant or gooseberry plant- within 
the infecting distance of 900 to 1,500 feet of the pine, except that the culti- 
vated European black current is so susceptible that it is necessary to destroy 
it throughout the white pine regions, particularly when within a mile of white 
pine stands. 
The pine areas to be protected in the United States total about I 
acres, and the border zones increase the areas from which currant and ■_ 
lK>rry plants must be removed t<> about 24,800,000 acres, in the Northeastern 
States about three-fourths of the control areas have been given initial | 
tion; in the Western States about one-third: in the southern Appalachian 
states about one-fifth : and in the North Central states less than one-half. In 
1934 in the country as a whole. 200,169,993 currant and gooseberry bushes were 
destroyed on 3,358,209 acres of white pine Land with 932,916 man-days of labor. 
The civilian Conservation Corps supplied 525,366 man-days of Labor for this 
work and destroyed 83,779,865 currant and - pry bushes on 946, 717 acres of 
land. The remainder of the work was performed with P, W. A.. State, and 
local funds. Over 20,000 men Were employed on control work, about half t^f 
whom were Civilian Conservation Corps enrollees assigned to this project from 
267 camps. The work was carried on in cooperation with ;;i siatc< and with 
Federal agencies responsible for tie administration of public lands. 
results are given in tabic i [. 
t ble 1 1. Ribcs-eradication operations /""/• the calendar 
• ■11 
: pi no 
value to 
Control 
(including 
red in 
I dfr- 
in : 
1. II4I.IHM) 
77! 
471. ins 
\ 
Mont ■ an Mounl R ntei 
113, AM, 311 
4,308 
• 
