=e 
T. T. Terrell, of the Coeur d'Alene, Idaho, field laboratory, 
spent the month of July in making an extensive examination of the Yel- 
lowstone National Park to determine the extent of the mountain pine bee— 
tle infestation now present within the scenic lodgepole pine forests of 
that region. July 9 to 10 were spent in an aerial reconnaissance of 
the forested areas within the park. During this reconnaissance the 
sroups of red-—topped trees were mapped for subsequent examinations from 
the ground. Mr. Terrell was accompanied on the last flight of this recon-— 
naissance by Fred Johnston, who is in charge of forestry work within the 
Yellowstone National Park. Glick insect traps were carried on the plane 
for the purpose of determining what insects were flying at different 
elevations from the ground. The remainder of July was spent by Mr. Ter-—- 
rell in examining the groups of red-topped trees observed from the air. 
Through the month of June the Coeur d'Alene, Idaho, field labora-— 
tory continued studies of the burning-standing method of mountain pine 
beetle control in lodgepole pine. L. G. Baumhofer has been in charge of 
this study, assisted by F. B. Foley and L. J. Farmer, temporary field 
assistants. 
A. L. Gibson and his assistants have been conducting a series of 
brood counts in dodgepole pine trees attacked by the mountain pine bee— 
tle in 1930 to secure more information relative to the potential in- 
crease which can be expected from mountain pine beetle infestations in 
lodgepole pine. A number of lodgepole pine trees around the battlefield 
within the Big Hole Basin were sprayed with crude creosote in an attempt 
to prevent further destruction by the mountain pine beetle of these 
trees necessary to the beauty of this historic site. 
During the month of June all the trees about resorts and summer 
homes in the Cody Canyon of the Shoshone National Forest which were 
threatened with destruction by the spruce budworm were sprayed with a 
standard lead arsenate and fish oil solution, while a series of sample 
plots were established along the roadside and treated with different 
sprays. B.H. Wilford and J. M. Miller are in direct charge of this op— 
eration, assisted by a crew of six men. 
Studies of the biologies of the Douglas fir beetle and mountain 
pine beetle are being conducted at Sullivan Lake, Kaniksu National Forest. 
The most important activity of the Portland, Oreg., laboratory 
during the past month has been the airplane dusting for the hemlock 
looper outbreak in Pacific County, Wash. Some 7,200 trees are affected 
and it is planned to cover them with calcium arsenate dust at the rate 
of about 20 pounds per acre. Fifty-four tons of dust have been purchased, 
and a plane contracted for, calling for a minimum of 40 hours flying. 
This promises to be the largest undertaking of its kind in the control 
of forest insects on a commercial basis. The work is being carried on 
and all funds supplied by private interests. 
