Atlanta tri-weekly journal. [volume] (Atlanta, Ga.) 1920-19??, 1921-09-06
NEW WAY OK|LL
PEACH TREE BORER

OfC NALLE L, sept. Gov
eminent agents here announce that
recent experiments have proven con-
clusively that paradichlorobenzen
will kill from 80 to 100 per cent of
the peachtree borers if applied prop
erly under the right conditions. 1t
has been used successfully in a COM
mercial way by large growers dur
ing the past year. All growers are
strongly advised to take advantage
of this new means of borer control
this fall and eliminate the expenses
of worming and injury to trees by
worming instruments.
Due to the fact that the protec-
tive tissues or cork layers of the
bark are not sufficiently developed
tect it from the action of .paradich-
lorobenZene gas this method of
borer control should not be used on
trees under six years of age. 1t can,
however, be used with safety on all
trees six years and older.
In order TO secure the most salts
factory results from the treatment
directions for applying the chemical
must be closely followed. Further
more, time of application is very es-
sential, and growers cannot expect
to get the desired results unless the
material is applied on or very close
to the date recommended.
Based on the borer's life history
in Georgia best results will be OBJ
tanned by applying the chemical. to
trees in this state about October 10
Satisfactory results cannot be eX-
pected by applying the material late
in the fall or in the winter. Wmen
the soil temperature becomes low
the chemical will not vaporize, hence
winter applications are useless. On
the other hand, applications made
before this date will not kill some
of the late Matching larvae. Grow
ers in Georgia are warned partlcu,
larly to apply the material right
around October 10 to Is.
Use one ounce of the pulverlzec
observation-disclosures to each tree
six years of age or older. No prep
aration of the soil is necessary ex'
cept to merely break the soil crust
with hoe to make it smooth, anc
to remove any grass or weeds. DC
not mound the trees. The. gas from
the chemical is about five times
heavier than air, and it is therefore
necessary to place the material al
least at the level of the topmost
borer galleries. Should gum be
found to be exuding from the tree
above the soil level, sufficient sol
should be added to bring the soil W
above the cumming exudatlon before
applying the chemical.
The material is applied in a con
tinuous land about one or two
inches wide about the tree. AVolt
placing the crystals against the tree
or too far from it., A ring of cry,s
trunk has been found to be most
satisfactory. Several shovelfuls OF
soil free from stones, sticks ant
trash are then placed on the crys
tails and packed with the back OF
the shovel. This packing is impor
los of the gas. The soil may be
placed somewhat cone-shaped around
the tree to prevent surface washing
of the crystals. Avoid pushing the
crystals against the tree trunk witt
the first shovel of soil when cover
ing.
1t is very advisable to remove the
soil that has been placed on the
crystals from four to six weeks
after the application was made, ane
do not replace it for several days
This practice is an additional pre-
caution against tree injury. 1t per:
mits the gas to escape from arount
the tree, which might cause some in
jury if it were allowed to remain
in the soil all winter. If the para.
dichlorobenzene is applied October
10. orchardists should see that the
base of the trees are uncovered b3
at least November FL, and allowed
to remain open several days before
replacing.
Orchardists should make it a poln
to see that the material used IS pure
paradichlorobenzene and in ordering
should specify grade OF the inc
ness of granulated sugar. Accord
ing to our present knowledge of thus
means of borer control successtu
results can be assured only with tn
above chemical. 1t may be o6taIneC
from several dealers in Fort valley
Ga, or from the LOCKER Si Hi straet
New York City; Rochester GERM mi
eide eide company, Rochester, N, Y; Tn NJ
Niagara Alkali company; NlagarS
Falls, N. Y, or E. c. Klipstei21 aS q
Sons Co., S44 Greenwich street. Ne"