
Ae ee AG 
During the early part of May a plan was formulated by J. C. Evenden of 
the Coeur d'Alene, Idaho, field station and the District Forester of District 
1 of the Forest Service, to institute control measures on a portion of the 
Missoula National Forest in an attempt to prevent the present Dendroctonus 
Monticolae Hopk. infestation in the lodgepole pine from crossing over the 
Continental divide into the valuable timber stands on the Deerlodge and Bitter- 
root National Forests. H. S$. Rust, Entomological Ranger, and H. Baurer, crew 
foreman, spent May 14 to 21 in cruising and marking infested trees. Control 
work started May 21, with a crew of five men and cook. ‘Two hundred and forty 
lodgepole pine were cut and peeled, and 770 peeled standing, making a total of 
en trees treated, scattered over 24 sections. The work cost approximately 

Maintenance control on the Hunter Gulch area, Helena National Forest, 
was completed during the month of May by the District Ranger and fire guard. 
Wifty-six infested trees were treated at a total cost of $51.71, making the 
average cost per. tree $0.92. 
The experimental control project in the white-pine stand on Independence 
Creek, Coeur d'Alene National Forest, was completed June 2. Forty-eight 
thousand board feet were treated at a cost of $5.00 per thousand. 
J. C. Evenden recently returned from an extensive examination of the 
Boise-Payette Lumber Co. holdings in central Idaho. ‘The control project by 
logging on the Arling area was examined and found very successful. An examina- 
tion was also made of a heavy infestation in the lodgepole pine in Long Valley, 
Payette National Forest, by a species of sawfly larvae. Adults will be reared 
and a determination secured later. There is a marked decrease in the pine 
butterfly epidemic throughout this region. 
While on a recent examination in the Coeur d'Alene National Forest, 
H. J. Rust found the spruce budworm becoming well established. One-third to 
one-half grown larvae were found on white pine, larch, hemlock, white fir, 
Douglas fir, and ingelmann spruce reproduction. Larvae were also found on 
large white fir, hemlock, and larch. 
The spruce budworm epidemic in central Idaho is still on the increase, 
and is gradually spreading throughout the timbered areas of the State. 
TRUCK CROP INSECT INVESTIGATIONS 
J. E. Graf, Entomologist in Charge 
J. E. Dudley, Jr., of Madison, Wis., has furnished the following inter- 
esting note on the collection of predacious insects from an alfalfa field: 
. "Yesterday we ran the aphidozer through an acre of alfalfa just before 
it was cut and secured a very interesting collection of many species of in- 
sects. ... We recovered 9,867 Syrphid larvae of two principal species, 785 
Coccinellid larvae, and 482 coccinellid adults, making a grand total of 11,134 
predators which were actually counted. There were hundreds of very small 
