The San Francisco call., 1910-06-26
PATHOLOGISTSWILL
Fight FRUIT PESTS
Prof. E. ]. Wickson Outlines
Work Proposed at Southern
California Laboratory

BERKELEY, June 25.-The schedule
Of work for the fiscal year that will be
attempted by the southern California
pathological laboratory has been out
lined by Prof. Z. J. wickson, dean of
tho college, and passed upon by the
regents. The walnut blight, the brown
spot on the orange and other pests of
deciduous fruits viii still occupy the
time of the plant pathologists and in
vestigation viii be continued with re-
newed vigor. The years work has
been outlined in Professor Wiekson's s
report, as follows:
The effort 10 circumvent the walnut blight
VIII continue with studies Of immune varieties
which have been gathered and planted IN the
vicinity of the plant disease laboratory at WHIT
Tier. Including careful exploration for trees which
are productive IN spite ~ the blight u various
parts Of the state Scions are taken from such
own grounds 50 that systematic observations
can he made. and are aso grated into trees
ln other reg ions II that practical tests or
value under commercial handling can be had.
We src also testing q large number OF Wild
walnut species and hFnrids to deternllne sui,- i
-ahllin for root stocks Of the English walnut IN
various soils and moisture conditions.
DISEASES or ORANGES
J Investigations in orange growing will he ex-
rended. Particular study will be made 81
brown spot" which has caused great losses in
shipping. Preliminary work with this disease
has Nelded encouraging results and commanded
The Interest OF growers who viii cooperate with
us by testing preventive measures IN their PACK.
citrus trees VIII De continued. Fertilization
pill be studied through held experiments and
laberatpry tests under conditions determined ny
analysis All features of this effort will be
eNteadod ~ demonstrate tentative results al
PomoIogicsl study Of tne navel orange with
2 view 90 The selection Of improved types and
the phases of Developments Of the fruit will be
continued and similar research extended 30 other
citrus varieties with a view 10 Increased COM
mercial value and suitability.
CITRUS TREE INSECTS
The investigation Of the life histories Of the
more important insects Of citrus trees will be
continued 10 extend knowledge needed 10 de-
Teipp the most effective and economical war
fare against these pests.
The culture and commercial handling Of
lemons VIII be investigated on a broader scale,
both ln held sDd laboratory. The disease known
a. antlracnose or -'wither tip" viii receive par
-ticulsr attention.
studies and hcld tests Of protective treatments
OF leading commercial vegetahies will be ex-
-tenaea through direct inFestigations aud co
operation W th growers whose interest has been
- Tar commanded by earlier efforts in this line
thsF they desire n make contribution toward
large scale demonstrations.
ROOTS OF STONE FRUIT
T.. Crown gall or root knot of stone fruits
menf.
The test II peaches with a view of securing
varieties Of more regular growth and production
under conditions which invite unreasonable Rctiv-
1fT and dormancF viii be continued by means
a collection of peaches now growing upon
the grounds VI the station, and LIBERALIZATION for
the production especially Of suitable varieties
viii be undertaken.
Propagation snd growth tests Of various fruit
and timber trees and other plants with sewage
irrigation. IN cooperation with the city OF
Pasadena upon farm owned for that purpose
by the city. VIII be continued upon an in
creased scale 10 make demonstra tions promis-
ing great value 20 all interior municipalities.
IMPROVEMENT OF PLANT
Increased equipment Of tie plant disease lab
oratory' AZ Whittier and the citrus experiment
station a. Riverside viii be secured through an
propriations for that purpose by the California
leeislature Of 1909 Both interior equipment
ana OUT door Improvements significant from the
point Of view Of ornamental and commercial
horticulture VIII be advanced.
Especial work under the legislative appro-
prlatiOn Of 1903 for investigations on the CON
3 dttlons and problems attending the culture OF
crops n the Imperial valley and similar adjacent
sections VIII be pursued TO the completion Of
2 report for the legislature Of 1911 This work
Is receiving the careful attention Of the uni
Fcrsity experts in soils. animal industry pIant
production. etc. and significant results are an
ticipated.