The Cairo bulletin., 1909-07-28
BARK BEETLES
Or Bark Borers Damage Peach and
Cherry Trees--How Treated.


Last year two species of Bark Beet
! les caused great damage to peach and
| cherry trees in various quarters of
the state especially in Northern Ohio
| on the Marblehead peninsula. One
species, Scolytus rugulosus, commonly
known as the Shot Hole Borer, is an
| old offender and attacks nearly all
varieties Of fruit trees and some forest
trees. The second species. Phloeotri-
bus liminaris, which has been called
the Peach Bark Beetle is compare
lively new pest and largely connnes
its injuries TO cherry and peach. The
work of the two species is very SINH
lar. The adult beetles bore through
rough places in the bark Of living or
dead trees, into dead peach or cherry
| wood piled up for sfovewood. into
the twigs of brush heaps or into any
suitable wood upon which they can
feed and in which make brood cham
bers.
When they enter the living sapwood
of peach and cherry and make CALLER
les through the same, their presence
is nearly always indicated by excess
siye exudations Of gum from the in
tested trunks and limbs Weakened
trees are preferred by the beetles but
those in perfect health may be so re-
Ia. az oh al hot q
fer the right conditions for breeding
and the insects then mass their at
tack on the exhausted trees, making
short work of their final destruction.
Trees ire often practically destroyed
before their owners become aware
there is anything wrong Extensive in
vestigations with these beetles are un-
der Roadway and We hope to be able
TO recommend effective treatment
after thiS season.
Pending further investigation we
'ecnmmend the following measures in
infested districts this season:
For trees seriously injured: Cut
he trees back TO stubs Of the main
limbs and apply barnyard manure or
commercial fertilizer. to pounds
per tree, in spring. The following
formula is suggested for commercial
fertilizer: phosphoric acid, s percent;
nitrogen, 5 percent; potash. per-
cent Give second application OF
or pounds per tree about the first
Of June. Apply in circle equai 10
he spread Of the limbs and rake. hoe,
Dr disk into soil Apply thick coat
If whltewash by means of a broom,
he last week in March or during the
first two weeks in April Give sec
md application the second week in
July; and a third about the first of
October Add one-fourth pound of
5able salt 10 each pail of whftewash to
make il stick longer.
Instead of whtewash twelve per-
cent emulsion of carbolneum avenar-
rs may be used, but this is more ex-
)ensive. However it kills the beetles
in their burrows while whitewash does
not Emmlsify by dissolvng three
pounds of naptha soap in three gal
IONS Of water by boiling. While hot,
add one gallon carbolineum and agl-
late as for kerosene emulsion with
Gree pump. Add four gallons of water
'or use, and apply with a spray pump,
Keep the face and hands protected from
his spray. Also cultivate trees TO
encourage thrifty growth.
For trees seemingly healthy and
slightly attacked or liable TO attack:
Fertilze, cultivate and whtewash
In all cases carefully burn all trim
nings and dead wood and grub out
lead trees and burn so as to limit
preceding grounds.-H. A. Gossard.