The Yakima herald. [volume] (North Yakima, W.T. [Wash.]) 1889-1914, 1906-08-22
EVILS THAT BEsET TREES.
Things To Be Watched and the Most
Approved Remedies.

Editor Herald: ! viii give rev
hints to horticulturists on things all
are apt to have to contend with hop
ing they may be of value to some one:
The Apple Tree Tent Caterpillar
Not many miles from the city of North
| Yakima the writer or this article ran
across several insecticides and fungi
cides that he believed did not exist in
the valley ut this time, and with proper
care and enforcement of the horticui-
ture law would not now be in our
midst; however, 1t is here, and the
next step to do is apply the remedy
TO this pest and if possible eradicate
the same. Thus our attention is first
called to the apple. tent caterpillar.
Having received a letter from an orch
ardist of the lower valley to come and
see as to regarding some of the pests
in his orchard; being always ready to
help and thereby also to learn, we
went, and our attention was drawn to
the following different insecticides and
fungicides, caterpillars, pear slugs,
pear leaf blight apple rot, as we'll as
grape anthracnose. I was rather taken
back that such condition should exist
where we have a fruit inspector. but
these do exist and I found myself in
4 position where l was compelled to
spend about five hours looking over
the orchard, and | found that after
five years of study in horticulture l
still was an infant The caterpillar
is TO great extent injurious to the
trees, but is easily gotten rid of in
L
spraying, hence the need OF spraying.
Pear Tree Slug.-A grcenish black,
( Shiny slug, that eats the parenchyma
off the upper surface-this is the pear
/ slug. 1t originates from eggs laid early
in June in the leaf by q winged
black fly. Remedies Spraying with
the arsenites, or pyrethrum, or helle-
bore is simple and effectual remedy.
Or, these substances may be busted on
with a powder bellows.
Pear Leaf Blight.-This fungus
should not be mistaken for the pear
blight; although similar in appearance,
it can be dealt with and the trees
saved. Many are the trees that are
cut down when this fungus makes it's
appearance, and the loss is sometimes
very great TO the orchardist when a
little inquiry would have probably
saved a good many dollar. The pear
leaf blight is one of the most destruc-
tive, and l shall try and describe it
as close as possible, as l have exam
ined it through a glass in an orchard
in the lower valley. This fungus had
advanced UP to the present and shall
! describe II
The tissue of the leaf including near
ly the entire leaf appear sere and
brown; very young leaves sometimes
curl up. When leaves are badly in
jured they fall off, and whole orchards
are sometimes defoliated by the dis
ease, the trees appearing as bare in
midsummer as they normally do in
winter. This fungus does not confine
it's attention to the foliage. the stems
and fruit are also attacked. The for
mer become blackish and dead, and the
latter is at first covered with reddish
pimples which finally become black
ened and rough, and generally caose
the pear to crack open in such a man
ner as to ruin the fruit. Spray with
ammoniacal solution of carbonate of
copper as soon as the leaves being to
unfold. and repeat application two or
three times at intervals of two weeks.
As to the other fungus, we will give
you a full description OF II, having
forgotten to bring a sample along OF
the grape anthracnose, which we WIN
get next week.
PAUL G. KRUGER.