The Yakima herald. [volume] (North Yakima, W.T. [Wash.]) 1889-1914, 1911-04-12
WOULD warn
AGAINST PESTS
Woody Aphis and Cottony Scale
Are Two Things That Are
Under the Ban
STUDY OF THE SUBJECT
MADE BY PAUL C. KRUGER
Some May Laugh at the Warn
ing" He Says, But the Maple
Trees on Naches Avenue Are
Threatened

Woody aphis and the cottony scale
are pests of the orchards to which
Paul q. Kruger has been giving con-
siderable study and he dropped into
the Herald last night to discuss those
subjects. He said:
During the spraying season l have
come in contact with much of the
above diseases. Vigorous warfare
must be declared against these pests
or we Will soon see the maple trees
now being planted by the city on
Naches avenue fail and decay. Some
may laugh at my warning but already
cottony scale has made it's appear
ance and as in the city of Mt. Vernon,
N. Y, this pest will do much damage.
False cottony scale is easily distin-
guished from the older and better
known cottony scale by the fact that
1T occurs IN conspicuous felted masses
upon the trunks of infested trees, and
also has large cottony aggregations on
the foliage, two situation where the
cottony scale is never found with its
conspicuous white covering The in
sect. though is inconspicuous naked
young occur upon the foliage is rarely
observed except on the under side OF
the limbs after the females have de-
Veioped their characteristic cottony
masses protruding from under a con-
spicuous brown scale. This species
can be controlled by a thorough APP
plication in the spring and early with
contact insecticde using the standard
kerosene emulsion which will also
prove effective and equally efficient
in the case of it's associates
The woody aphis instead of being
controlled is on the increase, ana
year after year with all the spraying
of lime and sulphur solution is not be-
ing eradicated. 1 have always con-
tended irrespective of the critics that
lime-sulphur solution will not eradi-
cate or even control the woody aphis.
] find that many authorities on en-
tomology uphold my contention.
The university of the state of New
York says: THE experience of the
last few years has demonstrated the
futility OF depending upon the ordinary
winter or early spring application of
lime-sulphur washes for the destruc-
ton OF aphis eggs up on the fruit
trees There may be some reduction
but the percentage killed in this man
ner is SO small as to be practically
negligible. Most fruit growers are
thoroughly familiar with the curling
leaves quickly following the plant lice
outbreak, and appreciate the difficulty
OF destroying the insects after the at
tack has progressed thus far. owing
to the impossibility of hitting the plant
lice with any contact of inseticide.
Experience has demonstrated time and
time again the practicability of de-
stroying these minute enemies of our
plants, BY thorough application of con-
tact insecticides, such as kerosene
emulsion or even dilute preparation
of some commercial petroleum COM
pounds" Education department bull
letin, University of the state of New
York 25th report of the state en-
tomologist, 1900
This is only one of the many au-
thorties on this most important sub
ject to the orchardist. WHY dealers
and others will contend that lime
sulphurs will destroy the aphis whom
the results are just the opposite is
beyond my comprehension l ask why
are the woody aphis and its associates
on the increase with the thorough
spraying our orchardists are doing
with the lime sulphur? Will not the
Wiseacre please answer? The time is
coming and in the not far distant fut-
ure when the orchards of this valley
will be so infested with woody aphis
that the trees will absolutely refuse
to give you the fruit you're entitled
to The remedy is at your door and
yet you refuse to use it. 1t can be
controlled much easier now than later
on. you will have to come to it, and
the sooner you begin the fight the
better.
In writing this article I am doing
it for your best interest and he that
heeds the warning will profit by it
Kerosene emulsion may be applied
for the aphis about April 10 and dur
ing the early summer.