The Hood River glacier. (Hood River, Or.) 1889-1933, 1910-03-10
CORVALLIS PROFS.
TALK TO CROWDS
HORTICULTURAL MEETING SUCCESS
Apple Growers Talk Plant Diseases at
Grove and Mt. HOOd-Today
at Park Grange.

at Park Uranges
The apple growers OF the Hood Xiv
sr valley have been afforded an excel.
lent opportunity this week to meet
together and discuss with the profes.
sors of the Oregon Agricultural Col
lege the various plant diseases which
effect the apple trees in this section
and which are liable to prove pest
and etiiment to the fIuit. Dean A.
b. Cordley, Prots. Il. S. Jackson and
+. l.. Griffith, the college and expert
ment station at Corvallis, and Prof. k,
NJ. Winslow, OF Victoria, b. c., who
has charge OF the horticultural ex-
pertinent work for the province of
British Colubmia, were present at
meetings held Tuesday at the Pine
Grove Orange hall and yesterday at
the Mt Hood hall aud today they will
speak to the apple growers at an all
day meeting to be held at the Park
Grange hall on the west side, begin.
ming at 10 o'cl ook this morning.
There was good crowd gathered at
the Pine Grove hall Tuesday morning
when Dean Coidley was introduced
and opened the horticultural al institute
with few explanatory marks. lie
said that he and the two professors
who we're with him represented the
phase of the work at the college deal
| ing with orchard diseases. lie stated
that the college bad conducted GER
tain experiments In the Hood River
valley last year and that they wanted
to discuss the things which they had
observed.
The next speaker was Prof. jackson,
who, noting the tact that his speciality
IVES the diseases caused by fungi or
bauteii la aud not those which we're the
result of insects, spoke of "Hood Riv-
or Problems. Prot. jackson empha-
sized the necessity OF first knowing
the life history Of the organism which
caused disease before 1t was possible
to intelligeutly prevent or cure 1t.
With regard to the apple scab he SAID
that it caused brown mold.like
growth on the leaves and fruit and
the treatment was to spray for it hut
that the | lte history OF fungus must
be known so as to know when to apply
the spray. The scab first affects the
tree In the spring.
The fungus is a plant. The apple
soab infection takes place In the
spring and 1t 10 spread by the wind
| d ring the summer. The old infected
leaves on the ground develop stage
mature in the fall aud the spores are
waited to the new leaves tor the in
itial Infection in the spring. Treat
ment must be begun before infection
to protect the young leaves and fruit.
The fact that the spores come along
over an extended period neoessitates
several sprayings. which for fungus
are preventative and not curative.
The Lime-Sulphur spray, which Is
used for the scab, should coat the
leaves and the fruit In plenty of time
SO that when the sporee commence to
grow the spray will kill them, al
though before they begin to grow they
are quite resistant and will not be
hurt by the spray.
| In the case OF anthracnose, a disease
which causes cankers on the tree,
| Bordeaux mixture was said by Prof.
jackson to be the Eett o. ray. The ma.
ture aankers 10 the summer and tall
are el elongated structures with postules
containing the spores. The round
spots caused by anthracnose foIm In
the fall, elongate during the winter
| and ATE at present one half to three
inches long. The canker natures In
| IN i'd summer and the spores are pro
duced IN the early fall. Singly they
| are invisible but many of them maybe
seen together in little whitish masses,
neld together by sticky substance,
| to be liberated and sent forth by the
moisture resulting from the 1Ist fall
| rains. Thus the anthracnose intec
| tion is spread early in th fall and II Is
| important to get ahead OF the intec
tion. Here again Prof. jackson EN-
| phasized the TACT that the kowledge of
| the lie history of the anthraonose
made 1t plain when was the beet time
for spray ing which he said should te
done Just soon as possible after the
apples are picked.
| In this connection there is prob
| lem still to be worked out in order to
nave a practice tor the seasons when
| there IL much rain early as the case
last fell. Prof. Jackson said that eX
periments would have to be made
ookiug to u spraying while the apples
Sere still on the trees, but that IN
this case the Bordeaux could not be
used because it would blotch the
fruit.
The speaker mentioned the practice
of some growers of shaving off the an
tnracnose spots and stopping their
sloWth but he said that this method
..s,I
any size as 1t would be nearly imp0s'
siule to fnd ell the infected place.
and it was OF little good to treat
part of them IN this fashion. Prof.
jackson said that the same eankel
would not grow alter the hrst sum
mer.
In the afternoon, Prof. jackson
had several specimens OF the diiieren'
diseases cauted by fungi. which ht
showed TO the growers and explained
lie said that anthraonose Was ofteL
confused with sOcalled winter klll
canker which was always accompanied
by heart rot in the limb. This rot Il
caused by an unknown fungus, TN
spore bearing portion OF which th'
experts have been unable to locate
| III Id bJllt QuebLlOu Wnetuei tHD h0"'
rot is first present or whether u come
as result of the "winter Kill l
| it Il present first 1t explains a weak
ened condition of the limb whicI
would make it more susceptI Die to th
"winter kill" This, according l.
Prof. jackson, is Hood River prob
, lem about which more information ]
needed. IL the rot condition ls pre-
rent ut frat the trouble will onl
ccme after severe winters.
: Prof. jackson urged the deslrabliit
Q OF protecting all wounds 10 some way
4 especially in view OF the fact that thl
4 neart rot which is not yet underston
: 10 present In the valley. tie SAID tns
g the anthracnose spot could be cut ou
]. aud dsinfected. Corrosive snblimat
e WAS recommended as good dislnfec'
II ant and the Bordeaux mixture may I
used. Prot. Jackson's remarks ha
given rise to great many question
J. from the growers assembled and iI'
discussion was opened which re'uite
In q number OF very interesting pom