Evening journal., 1907-02-21
REMEDIES FOR
San JOSE SCALE
State EntOmOIOgiSt issues
Bulletin Of Great interest TO
HOrtiCuIturiStS
SUGGESTS PROPER CURES

iege Experimental Station has issued the
following bulletin on the San Jose Scale:
The best time OF year for spraying for
the San Jose Scale will soon be here. and
persons intending 10 spray for this pest
must soon determine what they will use
Tho present article, while il contains
nothing OF Importance that has not al
ready been published in some OF our regu-
lar station bulletins. is offered In the hope
that Il may prove Of interest and value 20
those fruit growers who have not yet de-
clded what materials they viii use In their
spraying operations this year
The insecticides for the san Jose Scale
new in general use in Delaware may be
grouped under three headings, VIZ; Tho
Lime-Sulphur Wash; the ss-called "Soiu-
bic Oils Cbetter termed Aiiscible oiis).
and Kerosene Bmuisions.
The Time Sulphur Wash,
"Entomolosists throughout the country
seem to be pretty wen agreed that there
is no better or cheaper insecucide for the
San Jose Scale. all things being considered
than tho iime-sulphur wash. The main
objection 10 its use is found in the fact
that it requires some time for prepara-
ton and that II is dlsagreeable 20 apply,
owing TO its caustic properties. However,
the fact that those men who use the most
Of It appear to have the least fault TO
find. would seem to indicate that these
objections can be largely overcome by an
intelligent handling Of tho material.
Various formulas for the preparation
OF this wash in different sections OF the
country have been published, but nearly
all OF them have given uniformly good re-
suits. The formula which the writer IS
at present recommending is as follows:
Lime. 80 pounds; sulphur 20 pounds,
salt, 10 pounds; water 50 gallons
"nhe lime sulphur and salt should be
boiled together in at least % gallons OF
water for period Of S0-i5 minutes: the
rest OF the water may then be added and
the material is ready for application. The
boiling may be done either by steam OF
over a fire. II done in the latter way,
only iron kettles should be used. as cop
per or brass receptacies or galvanized
iron watts are easily corroded by tho wash.
In applying this material much discom-
fort may be avoided by wearing rubber
ElQNNG dI4u onAIaA AlA3 AAlt AnAH WIN vast
line.
THE lime-sulphur wash may be applied
late in the fall, in the winter or early in
the spring. II is best applied shortly be-
fore the buds open. It cannot be used upon
trees in foliage
The Miseible Oils.
There are three proprietary insecuclde'
I i.
quite extensively in Delaware tho past
season. They are commonly known a
Soluble Oils. and sold under the trade
names scaiecide, Ial-O-Scale and Target
Brand Scale Destroyer.
''rhe manufacturers of these insectcide
ordinarily recommend their use at TN
rate Of one part to twenty parts of water
and the writer has, in some instances, hal
satisfactory results from their use at thi
rate However. Il would now seem advis
able, in vlew Of SONS. personal experienc
and the reported oxperinces OF others. q
recommend their use at the rate Of on
part to not more than fifteen parts o
water.
'The miscible oils are easy 70 handle
since they mix readily with cold water
/ and there Is nothing IN the spray nllxtur
TO clog the nozzles or corrode the pumps
Another point in their favor Is that the.
are not caustic IKE the lime-sulphur wash
and there is ordinarily but little discom
fort In their application. Their cost, how
ever. is considerably greater than that o
the lime-sulphur wash. and their value a
fungicides has not yet been satisfactorily
u proven.
In using these oils one point shoul
always be borne in mind; the content
b. Of the original package. be Il small o
large. should be thoroughly agita.el be
fore any portion Is mixed wath water TO
4 spraying. Tho reason for this As that &
some cases there appears to be sepsra
ton Of the oils upon standing. tho resul
being that at the top Of the recepiacl
material may be found quite differen
from that az the bottom. Some serious in
jury 70 trees, in this State has been at
tributed 70 failure TO observe this import
ant point.
Kerosene Emulsion.