ittle experience is necessary before one can recognize the work of
this borer.
The insect passes the winter in oval cells as stout, whitish,
brown-headed grubs about 1/4 of an inch long, the beetles appearing
from the last of June to the last of July. Badly injured trees are
beyond hope and should be cut some time during the winter and the
bark burned before the beetles can emerge; otherwise many will
mature and attack other trees next spring. It is particularly
important to locate the trees which have died wholly or in part the
past summer, because they contain grubs likely to mature and then
be the source of trouble another year. General cooperation in the
cutting out of infested trees and burning of the bark as indicated
above will do much to check this enemy of our hickories.
E. P. PELT.
State Entomologist.
The following "Press Notice" was issued by the U. S. Department of
Agriculture under date of Nov. 15, 1911:--
THE DYING HICKORY TREES,--CAUSE AND REMEDY.
Within the past ten years a large percentage of the hickory trees
have died in various sections throughout the northern tier of
States from Wisconsin to Vermont and southward through the Atlantic
States to central Georgia and to a greater or less extent within
the entire range of natural growth of the various species.
CAUSE.
While there are several and sometimes complicated causes of the
death of the trees, investigations by experts of the Bureau of
Entomology, U. S. Department of Agriculture, have revealed the fact
that the hickory barkbeetle is by far the most destructive insect
enemy and is therefore, in the majority of cases, the primary cause
of the dying of the trees.
HOW TO RECOGNIZE THE WORK OF THE BEETLE.
The first evidence of the presence and work of the beetle is the
premature dying or falling of a few of the leaves in July and
August caused by the adult or parent beetles feeding on the bark at
the base of the leaf stem, but this work alone does not kill the
trees.
The next evidence of its destructive work is the dying of part of a
tree or all of one or more trees. If the trees are dying from the
attack of the beetle, an examination of the inner bark and surface
of the wood on the main trunks will reveal curious centipede-like
burrows in
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