The Yakima herald. [volume] (North Yakima, W.T. [Wash.]) 1889-1914, 1905-04-12
FRUIT INSPECTOR
DISCUSSES SCALE INFECTIONS
Scale Insects to be Found In the Yak.
lima Valley.

To a great many people the word
scale, when referring to insects. is
the most common specie found here,
the San Jose scale (aspidiotus per-
niciosus), which is as commonly to
be found upon fruit as upon trees.
But there are great many kinds
Of scale insects; Of these l nave found
six species in the Yakima valley.
The foremost in destruction and
multiplication, as most fruit ifien
know, is the San Jose scale that at
tacks almost all kinds Of vegetation,
as we'll as the fruit trees and fruit
which it prefers and thrives best
upon.
This scale insect passes the winter
in the partly or full grown stage un-
der the scale covering and in the
spring, about the first OF May, the
female lays about 200 eggs; there
being four generations annually. one
female will cause the production of
about 1,60O,OO0,0OO scale insects
in one season, and anybody can cas-
lily see the necessity Of keeping this
insect under control by the lime and
sulphur spray during the winter or
spring months. and by the importa-
ton Of parasites to destroy them.
Another quite common scale in
sect found here is the cottony cush-
ion Ucerya perchassi). which was
introduced into the United States
in 1868, and has been found in diff
ferent parts of the Yakima valley.
This scale attacks nearly all kinds
Of trees and shrubs, and is easily ex-
terminated by the use Of the lime
and sulphur spray.
The oyster shell scale (mytilapsis
pomorum), although 1t does not null
tiply very rapidly, is as hard to kill
because the covering 10 not easily
penetrated; for 1t the only spray
recommended il the exceedingly
caustic winter wash. This scale ia not
very commonly found in this valley.
The coccus hemisphericum, an
oval. aatish shaped gray scale. is
quite commonly fssna uDoA the trees
and canes near North Yakima. This
insect has no separate c0vsriag and
10 easily killed by lime and sulphur
or kerosene emulsion spray.
4he next nearest resembling the
coccus hemisphericum is' called the
lecaniam hemisphericum, a large
hemispnerical shaped insect about
the size Of one-half a 9 mall pea.
brownisn IN color and very easy to
discover, and equally easy to exter-
inmate with the kerosene emulsion,
or better still, the lime and sulphur
spray.
The rose scale (diaspis rosae) is
quite commonly found upon rose
bushes and berry canes. are white
and are very easily killed with kero-
sene emulsion or the lime and sui
phur spray.
There are others quite as bad as
the San Jose scale that have not, to
my knowledge, been found in this
valley. and will be kept out II pos
sible to do so. / might state that !
found some OF North Yakima's shade
trees very badly infected with three
kinds of scale insects, and these pro-
ducing dying effect upon the tree.
All OF these insects except the oys-
ter shell scale are easily controlled
by tne use Of the lime and sulphur
spray. properly cooked and applied
during he spring months. The mix
ture recently recommended by the
experiment stations Is one pound
each Of lime and sulphur, to four gal
Ions of water, boiled until the sui
phur is thoroughly dissolved. /
wish to caution the fruit raisers in
regard to depending upon the heat
Of the lime when shaking to dissolve
the sulphur, for they may have to
spray over again, or do all their
work and have the expense for NO
value. NJ. w. RUSSELL.