The Delta independent., 1907-07-26

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is used to run down on the trunk.
since injury is done ny its pene.
traling the breathing pores.
While this hand method sounds
very crude. it is really very ef-
fective and at the time mentioned
The orchard can be gone over
very rapidly. This should be
done several times in the course
of the five or six weeks when
they are coming out of the
ground. Even after the insects
have passed out on to the bran
ches almost complete annihila-
ton of the pest has resulted by
perseverance with this method.
The problem in the case of the
Green Aphis is almost entirely
problem in spraying. That il
has not been successfully met is
evidenced by the number of dif-
terent materials and f. rmulas
used in combstipg it. Arsenate
of lead is now almost everywhere
recognized as the specific for
the Codling Moth; for the Green
Aphis the specific is not yet
settled upon. Almost every
grower is trying different
thing.
The most general winter treat.
ment has been with REX" lime
and sulphur wash. Our Observa
tions seem to show that this has
been more generally effective
than soluble oil, which has been
used in some instances. Neither
has been completely effective
Many eggs were killed but
enough survived in every case
to infest the orchard. However,
those who sprayed should not be
discouraged. The aphis was
not nearly so abundant in these
orchards for several weeks as
in those which were unsprayed.
Moreover, the conditions this
year have favored the aphis to a
remarkable extent. The small
crop on the tree has been accom-
panied by a tendency TO excess
i've vege,aiive vigor. a great pro-
duction Of water sprouts and tip
growth-just such food condi-
tions. in fact. as the aphis re-
quires. This has undoubtedly
led to increased production OF
these insects. and hence the
J abundance OF the pest this year.
For this reason l am convinced
that early spring treatment with
lime aud sulphur wash should
be continued. However. | he.
lieve that the preparation OF
this wash should be arranged
for locally, several growers com
bined to establish the necessary
apparatus for its preparation. A
second hand boiler (Which can
be bought for its cost in old iron)
a shed to put it 10, and plat
form tank are the essential parts
Of such an equipment The sav.
ing in the preparation OF the
wash materials alone considered.
amounts to about so per cent. of
the cost of diluted Rex" while
its effectiveness is remarkably
increased by being applied while
warm and fresh. Experiments
have also shown that the steam.
ed preparation is more effective
than the boiled one.
Results obtained with summer
sprays in many cases have seemed
contradictory. In view Of this 1t
was believed that the Delta County
Fruit Investigation could not do
better than to pursue a series Of
systematic experiments right along
this line. While this series is by
no means completed, and Is still In
progress, we feel that the serious
ness of the investigation over the
whole county depends that we pub
lish in every county paper the re-
suits 80 far obtained.
Right at the start, we desire TO ex-
press our great obligations to Mr..
Eugene +. Hubbard, of Cory, who
placed at our command not only his
orchard and equipment, but his re-
sources as well so that the investi-
CATION has been at practically no ex-
pense in all the series Of ofexpcriments.
Thanks are also due to Mr.. John
Travis, of Delta for crude oil used
In one experiment.
A portion of the Hubbard orchard,
containing about 1000 trees, planted
In 1899, has been used In the expert
ments. The varieties are chiefly
Rome Beauty, GanO, Jonathan,
Winesap, Grimes Golden, Willow
Twig, and a few Of Smith Cider and
nther YArIatIeA. The HnraYS Were