The ranch. [volume] (Seattle, Wash.) 1902-1914, 1906-03-15
nything that will destroy the

Anything that will destroy the
growing power of these spores is
called a fungicide. Nothing has ever
been discovered that will do this work
of killing these spores as we'll as
copper. The best form of copper tc
use is the sulphate of copper, com
monty called bluestone or blue vitr1ol
This sulphate of copper has caustl1
property in it that Injuries what we
might call the host plant, that is
the plant on which the fungous growth
works, and so by it's use in the raw
state we may not only Kill the fungi
but iniure the trees on which they
are working. But it has been discov
cred that by combining the bluestone
with quick lime, this caustic property
is neutralized, and the copper Is no.
impaired in it's destruction OF the
spores referred to. The lime acts or
the sulphuric acid and neutralizes 1t
It must not be forgotten that blue Wit
riol "copper" sulphate) is formed by
dissolving the black oxide of copper
in sulphuric acid. So combining the
bluestone with lime, the sulphuric acic
is rendered harmless to the host plant
This beneficial action on the sui
phuric acid in this copper COMPOUND
was first used at Bordeaux, France;
hence the compound of lime and blue
stone is called the Bordeaux mix
ture."
This Bordeaux mixture" must be
prepared with much care. 1t is moi
necessary in all cases to know JUS
the chemical changes that take place
when we mix the milk of lime with
the dissolved bluestOne But 1T Is
very important for us to follow the oil
rections in its preparation or its ell
cheney may be greatly impaired, If moi
wholly destroyed.
The following method of making
Bordeaux mixture must be carefully
carried out: Suppose that we want tc
make fifty gallons of the mixture. we
must use six pounds of bluestOne, foul
pounds of lime and fifty gallons OF
water The bluestOne should be dis
solved in twenty-five gallons OF water
Use a wooden vessel, put the blue
stone in a burlap sack and hang it II
the water. If the sack is moved VI
and down occasionally the bluestone
will soon dissolve. The lime must be
Stacked by using enough water tC
keep it from getting dry and burning
and not enough to drown" it. Their
enough water must be added to make
just twenty-five gallons of the milk Of
lime. You have twenty-five gallons Of
each mixture Let the contents o.
each cask be poured into another casl
that will hold fifty gallons. They
must be poured at the same time ant
in equal proportions, and thoroughly
stirred as the process Of pouring goes
on. This is the ideal way OF making
Bordeaux mixture, and if these d1rec
lions are carefully followed prepa
ration is secured that will prove deati
to the spores referred to above.
the making is carelessly done, ant
these directions not followed, the re
suit will be poor or worthless prep
aration. Many failures in combattlnt
fungous diseases are to be attributes
to mistakes in the preparation or TIT
mixture.
The preparation above described Ii
what is called full strength Bordeaux
If double the bluestone and lime arr
used and the water not increased, thu
preparation is called double strength
Bordeaux. If, however, but half thu
bluestone and lime are used, then 1T i
known as half strength Bordeaux. Al
these strengths are used, as we shall
show pretty soon.
One thing must not be overlooked
and that is, the Bordeaux mixture
must be used the same day in Which