Aspen Borer and How to Control It Page: 3
11 p. : ill. ; 23 cm.View a full description of this pamphlet.
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THE ASPEN BORER' AND HOW TO CONTROL IT.
By uEOu Iuo11:r':a,
Entomological Ranuer, 'orcst Insect In rl(stiytions.
CONTENTS.
Trees attacked Iy the aspen borer__ 3 Associated insects and disease___ ...
('haracter a nd extent of injuries____ 4 Condition of t rees at tacked _- 10
I)istribution --------------------- Situation and conditions favorab!e
Seasonal history and habits_-------- 7 for attack --------------------- 11
Description_----------------------_ 8 Control measures----------------- 11
Natural enemies _------------------
TREES ATTACKED BY THE ASPEN BORER.
E XTENSIVE (lealenings in aspen trees, due plrinlarily to the
work of larva of woo(ll)oring beetles, occur throughout the
Pikes Peak region of Colorado. The most common and widely dis-
tributed insect causing this injury is the aspen borer;' but at higher
elevations and attacking only the base of the tree another roulndheaded
borer 2 plays an important part, causing a large percentage of
windfalls.
Aspen shade trees are equally susceptible to injury by the aspen
l)orer and are frequently killed or so riddled that they l)reak off in
the wind.
Among the native or introduced species of poplars3 growing in
this region none is immune from the ravages of the borer. A very
large percentage of the various species of poplar in Colorado
Springs, Colo., and adjacent city parks, together with those in the
forests of this region, are affected by this insect.
The heartwood of trees which are repeatedly attacked becomes
honeycombed, causing dead limbs and tops which are easily broken
off by the wind, finally resulting in the death of the trees.
Aspen and poplars generally are looked upon as short-lived trees.
This is true in a measure, but on Cheyenne Mountain, in Colorado, at
an elevation of 9,000 feet, the writer recorded over 75 aspen trees,
growing in mixture with Douglas fir and Engelmann spruce, that
had attained a size of from 15 to 23 inches in diameter and from 70 to
I aperda calcarata Say.
9 Xylotrechus oblitcratus Lec.
a Populus deltoides (common cottonwood) ; P. angustifolia (narrowleaf cottonwood);
P. acuminata (lanceleaf cottonwood) ; P. fremontii (Fremont cottonwood) ; P. occiden-
talis (western cottonwood); P. nfgra var. italica (Lombardy poplar).
184875*-20 3
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George Hofer, 1863-. Aspen Borer and How to Control It, pamphlet, 1920; Washington D.C.. (https://digital.library.unt.edu/ark:/67531/metadc86022/m1/3/: accessed July 17, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.