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FOREST INSECTS 
iF. C. Craighead, in Charge 
Doctor Craighead spent the first week in September inspecting the 
field work at Asheville, N. C. R. A. St. George has been in charge of 
the field laboratory there since J. A. Beal left it. Considerable pro- 
gress has been made with technique for injecting poisons into trees in- 
fested with Dendroctonus. Under certain conditions it is now possible 
to kill the development broods of this beetle, but the method is not 
sufficiently practicable for control operations on a large scale. 
On August 27 R. W. Caird, plant physiologist, who has been em— 
ployed at the field laboratory at Asheville this summer, fell out of 
the top of a pine tree which he was examining, and sustained a frac— 
tured pelvis. He will be laid up for two or three months. 
J. C. Evenden reports that an unusually large number of calls 
have been made for examination of forest areas infested by Dendrocto— 
nus wonticolae. This insect has increased rapidly during the past year, 
especially in forests of the white-—pine type, and recommendations have 
been made to the Forest Service that several large control projects be 
undertaken. 
Messrs. Miller, Keen, and Person, of the field laboratory at Palo 
Alto, spent a week in September with several officers of the Forest Ser-— 
vice in an experimental marking area on the Modoc National Forest, Calif. 
A considerable body of timber on this forest was.sold last year because 
of the infestation by insects. Part of the area will be marked so as. 
to leave after cutting only those-trees which are considered notgeuaes 
ceptible to the attack of the western pine beetle. This will consti—- 
tute the first real attempt on a large scale to put into effect the re— 
sults of experimental studies of the past three years. 
L. G. Baumhofer closed up the season's activities at Halsey, Nebr., 
in September. He reports most gratifying results from the introduction 
of an eastern parasite (Campoplex sp.), in the control of the infesta— 
tion by the pine tip moth in Forest Service plantations. The percent— 
age of parasitism of the tip moth has been increased from around 15 to 
20 per cent to over 80 per cent, and already the effect is indicated 
by more normal growth of the pines. 
Doctor T. E. Snyder returned to Washington on September 18, after 
attending the meetings of the Termite Investigations Committee, under 
the auspices of the University of California, at Berkeley, Calif., Sep- 
tember 1 to 4. The termite problem in California is becoming serious, 
and the State is fortunate in having such a committee to cooperate with 
the Pacific Coast Building Officials' Conference, the County Agricultu— 
ral Commissioners, and the State Department of Agriculture, in their ef- 
forts not only to protect buildings from damage by termites but also to 
