The Prince George's enquirer and southern Maryland advertiser. (Upper Marlborough, Md.) 1882-1925, 1918-01-18
MUST BE PROPERLY MIXED

MUST BE PROPERLY MIXED
Some Practical Directions Given For
Preparing Llme-suphur and
Bordeaux Mixture.
College Park, June 28.-Every pro
Queer of farm and truck crops affected
by plant diseases is taking unusual
precautions to prevent the appear
ance and spread Of disease. Forum
ately, most diseases can be prevented
or checked by two or three s1mple
spray mixtures that can be prepared
and applied by the grower. In warn
ing issued by the Maryland Agrlcul-
tural Extension Service, through It's
county demonstration agents, Z. h
Temple, State Plant Pathologist, gives
some most practical directions regard
ing the home preparation of spray
mixtures. Prof. Temple says: Every
year. thousands of dollars worth OF
food materials in our State are de-
stroyed by plant diseases and insects
This great loss can be cut down at
| relatively small cost by the use OF ap-
proved precautionary methods, such as
the selection Of seed free from disease,
| the rotation of crops and the spraying
| for both diseases and insects.
Directions for making the more
| important fungicides are given below:
seIf-BoiIed Lime-suIphur.
"This material is used for the con-
troll OF rot and scab on stone fruits.
| such as peaches, plums and cherries.
1t is composed of:
"F1owers of Sulphur (f1nely ground)
8 pounds.
| "stone Lime Of good quality s
pounds.
| Water, so gallons.
| 'sTo make this spray material, start
| the lime to shaking in a dfty-gallon
| container with a little water, using
hot water il the lime acts slowly. AS
| soon as the lime begins to Stake rap
idly, add the sulphur and stir cont1n-
uously. Add just enough water from
| time to time to keep the mixture IN
the form Of a thin paste and to allow
the mixture to boil violently from
three to FIVE minutes. At the end or
this time, fill the container with cold
water 50 as to prevent any further
| action of the lime. The mixture Is
now ready to strain into the spray
tank. Larger quantities may be made
in the case Of commercial orchardists,
but greater care will be required to
prevent the mixture from becoming
too hot in which case the sulphur will
be dissolved and there will be a red
scum formed on the surface after the
mixture has been allowed to stand for
| few minutes. This red material will
in1ure the foliage and fruits of peaches
and plums When applying this spray,
good agitation is essential.
"As a substitute for this homemade
spray material atomic sulphur, which
IL q commercial product, may be used
| at the rate Of five pounds to so gal
Ions of water.
Concentrated LIme-suIphur.
| '"This material is usually purchased
In the concentrated form which usu.
ally tests 80 to "a degrees Baume
scale. This solution when diluted to
one part to 40 parts Of water, makes
a good fungicide for spraying apples.
pears and ounces for various fung-
GUS diseases.
Bordeaux Mixture.
4 "This is the standard spray for
\ truck crops, potatoes. tomatoes, grapes
\ and for apples in the case Of bitter rot
4 and blotch. The material Is made
from:
Copper sulphate (Bluestone), 4
A pounds.
H stone Lime of good quality. 4
4 pounds.
Water, so gallons.
In making the spray material dis
solve the blusstone by suspending 1t
l in a bag near the surface of few
4 gallons Of water contained in wooden
\ or earthen vessel. Stake the lime and
4 add several gallons of water so as to
Y make milk of lime. Strain the blue
! stone solution into the spray tank and
4 add enough water to make from 20
II to 80 gallons. Then strain the milk
\ Of lime into the barrel, agitating the
II mixture vigorously. Add water to
II make so gallons and use Immediately.
The secret in making good Bordeaux
4 is to have the bluestone and the milk
i of lime fairly we'll diluted before put
\ ting them together and then while they
II are being brought together they should
N be stirred continuously. If concen-
\ trated solutions are put together, d
4 very poor grade of Bordeaux 10 the
4 result.
Stock solutions may be- made by
dissolving bluestone the rate of one
4 pound per gallon of water. Stake the
A lime and dilute to one pound to the
d gallon These will keep indefinitely
4 II kept separate, but they should be
l covered to keep the water from evap-
4 Grating When using them, mix &C
cording to the formula above. Pre-
4 pared Bordeaux, both dry and paste,
ia on the market and may be substi
1 tuted for the homemade mixture. Cou
suit your County Demonstration Agen:
\ regarding the details of preparing "ny
Of the above mixtures.