Daily independent. [volume] (Elko, Nev.) 188?-1915, 1893-10-11
Results Of Spraying.
Newspaper Bulletin, No. lO.l

III oddo " Ouo pEeSeuU year inc
chronological department of the Ex-
pertinent Station undertook export
ments to determine the efficiency of
spraying with paris green in prevent
lag the destructiveness OF the codling
moth, the parent Of the worm SO iu-
furious to the apple crop of Nevada
Efforts In this direction have been
made In previous years, but they have
been confined to one, or at most, a
few trees at a place. In some of these
cases the result was very satisfactory,
while in others it was but partially so.
This variation in results has without
doubt been charSeable TO lack Of
care in the application of the poison.
The results in these cases that were
satisfactory were quite apt not to be
considered as Indicative of results in
field practice, owing to the small num-
Der Of trees treated in each case.
Thus it was to determine the cause Of
former failures and to make the con-
ditions OF the experiment conform as
nearly as possible TO those of actual
field practice that the following work
was performed.
a block Of forty-eight trees in the
orchard Of A. b. Williams, on sixth
street, Reno, was selected for treat
ment, the remaining portion of the
orchard being left uutreated to serve
as check upon the work. TO i'm
prove the conditions Of the experiment.
in this respect the two adjacent rows
of the two portions of the orchard are
OF the same variety (the Ben Davis,
and each was we'll laden with fruit,
The poison used was paris green in
water mixture at the strength of one
| pound to 225 gallons of water. Dur
ing the process of application much
care was taken that as complete mix
ture as possible and thus d uniform
strength, should be main tanned While
care in this respect permits the fruit
| to receive moro nearly uniform treat
ment, 1T is most important in prevent
ing the injury TO foliage due to too
great strength Of poison, which tends
to settle to the bottom Of tho vessel
from which it is drawn.
The first application was made Juue
LIST aud "a. The row OF Ben Davis
| trees was given second treatment
| on June Oath. The remaining trees
thus received but single application,
that of June LIST and I'd. At the time
Of the first treatment the blossoms
were falling. On the second applicl-
ton the average size OF the fruit was
that of walnut.
An examination of the orchard in
the second week in September, when
fairly careful observation of the
trees was made in passing from one to
another, resulted In there being found
less thun dozen examples of wo-my
fruit on the trees which had received
the preventive treatment. The row
twice sprayed apparently had been
much benefited by the second appli-
cation.
An examination of the portion of
the orchard not sprayed showed a
large percentage of the fruit to be
wormy. This was particularly
noticeable on the row Of Ben Davis
trees adjoining that Of the Same va
riety which was sprayed. The fallen
fruit naturally showed a greater per,
centage injured, but the relative pro,
portion of such in the two parts OF
the orchard seemed not materially
different from that in the fruit still
on the trees.
1t is TO be noted that the examina'
ton was not a close one. Greater