· Jnsecticides cmd Ftmgicides. 23
i.. . alone on foliage because of their caustic action. In winter
V A ‘ on dormant trees it is sometimes used for fungus troubles,
A about two pounds being dissolved in a barrel of water. A
  ` weaker solution—one pound in 200 gallons of water——may be
used on foliage in summer when fruit is well matured and
  it is not desirable to use sprays like Bordeaux mixture, which
leave a residue. The bluestone may be quickly dissolved by
r pouring boiling hot water over it. When one is not hurried ·‘
, A it may be dissolved by suspending in a loose sack in the
  water. It dissolves slowly if simply thrown into the water
and allowed to settle.
. To avoid to some extent the delays involved in dissolv-
· ing bluestone it is well to buy a finely powdered grade now
  manufactured for the making of fungicidal preparations.
. BORDEAUX MIXTURE.
' A standard formula for the preparation of this valuable
, mixture is the following:
i Bl11€SiZOI1€ ............... 4 pounds
Fresh lime. .............. 4 pounds
i` Water ........... · ...... 50 gallons
Dissolve the bluestone in 25 gallons of water, slake
the lime separately and add water to make twenty-five gal-
lons, then pour the two, bucket by bucket, into a third bar-
rel so as to mix thoroughly. For peach and plum, which are
more tender than apple and grape, the above formula may
’ · be changed to the following:
1 Bluestone .............. 2.5 pounds
, , Fresh lime ........ . . . . 2.5 pounds
  Water ................ 50 gallons
1 - These are the best preparations known for mildews, rots,
ll scabs, smuts, and the like, and where one is dealing with a
I _ fungus trouble, and is uncertain as to how to proceed, the
l chances are that he will accomplish as much by using this
. preparation as with anything that could be recommended. It
. is the best general purpose fungicide we have at present.