Alma record., 1922-08-03
URGE SPRAYING
FOR POTATOES
SPRAY BEFORE TROUBLE BE-
GINS is ADVICE FROM
vi. A. {.

Bordeaux mixture and arsenicals
properly made and properly applied
are the best preventation for foliage
and insect injury TO potato plants
such as Late Blight, Early Blight,
Leaf hoppers, flea beetles and pota-
TO Bugs
The time to spray is before the
,rouble begins. The size of the
plants is not always a sure guide.
Leaf hoppers, flea beetles and potato
bugs may begin very early when the
plants are small. The interval be-
tween sprays will depend on weather
conditbns, rap;dity of growth and
prevalence Of insects. Spray often
enough to keep the new growth COW
cred with an armour Of copper. Usu-
ally the application of spray from
ten % fourteen days apart will give
good control.
The machine that will spray and
protect The whole leaf must spray
from underneath as well as from
above. The pressure necessary to do
This effectively should be at least
l10 pounds, and 200 pounds pressure
Is better. Good results can be OBJ
lned ~ knapsack sprayer if
,rroat care is exercised, but it takes
e9 mach time and heavy labor that
tUr iavgc fields il is not economical or
Efficient Leaf hoppers need the
spray on both sides Of the leaves for
thrlr control. Good seeds come
from nealthy vines. Fields that are
badly infested with leaf hoppers, or
effected so that the foliage is mater
i.lly iaiuled cannot he considered the
best for iced.
Bordeaul mixture consists of cop
per sulpnate (Blue vitrol or Blue
.tcnel, stone inc or hydrated lime
aad u-,er. The proportion to use is
pounds Of copper sulphate, pounds
of stone lime of 8 pounds Of hydrated
hme ant 80 gallons ot water. II re-
luires 100 gallons per acre Of Bor-
coauX nlN,cl" which is known as s.
S--i00. IL vii require approximately
, epw.s pei season ard al o pounds
per acre application ii wiil require
20 pounds of copper saiphate, 10
pounds stone Ilme or ,H pounds hy-
Grated lme for ea.t acre.
Bordeaux mis'lre 1850 should
have some poison added to it, such as
l@ pounds of calcium arsenate Of
thi, is MOI available one pound of
paris -reen or two pounds of arse
narc cf lead may be used,) for the
coUto' of insects hat are usually
prevalent may not be necessary
.o 15d ,ae 2rscu,ca. to more than the
first Jvy sprays.
lr mannr the preparation fifty
gallon barrels will be sufficient.
Place the barrels so that they will be
Wear The wafer supply. Weigh out
80 pounds If e0Dpe- sulphate in a gun
ry .ac.. and fasen near the top of
one oc the barrels by pulling the top
Il the aack over the edge of the bar
lel aid nailing it. Fill the barrel
wi.h water. This should be done the
night before the spraying is to be
cone 10 rot put copper sulphate in
the bottom Of the barrel and expect it
to dissolve. Place so pounds of stone
,inc INTO the bottom of the other bar
rel and add water slowly at first,
sprinkling evenly over the lime as
the chunks begin to dry add more
water until the vigorous heat begins.
Then add water rapidly enough to
prevent its drying and slow enough
u keep it like thick mud. Let it
cook until it is smooth and creamy,
then fill the barrel with water.
The stock solutions contain one
pound Of copper sulphate and one
pound of lime per gallon. This will
make 625 gallons which is enough to
spray acres. Fill spray tank 600
gallon Tank half full of water and
add gallons from the lime barrel,
l~tlr we'll before using), and fill the
tank Wtn w7 ter. Use a hard wood
stirring stica so that splinters Of
wood VIII not get in the solution and
clog the nozzle. Never pour together
The strong sock solution and dilute
afterwards. Paris green, arsenate of
lead or calcium arsenate should first
be mixed with a small quantity of
water and made into a thin paste be-
fole 10 is added. All materials should
De strained through a sieve as they
enter me tank.
For pant ice (poia ato aphis) add
pint of l0Tt nicotine sulphate to the
100 gallons of spry just before spray
ing In case Of severe attact of leaf
hoppers, add 2 to 4 pounds of lime
extra over that needed for the regu-
isr Bordeaux. Never use metal con-
taiuers for copper sulphate. A we'll
enameled pail can be used but
wooden pail is better ]. w. Wes-
ton, Extension Specialist, Michigan
Agricultural College.
PLEASING CARNIVAL