This is made as follows: -

Sulphate of copper (blue vitriol) or sulphate of iron (copperas) 1 1/2 lb.

Quicklime ... ... ... ... ... ... ... 6 oz.

Paraffin ... ... ... ... ... ... ... ... 5 pints.

Caustic soda ... ... ... ... ... ... ... 2 lb.

Water ... ... ... ... ... ... ... ... 9 1/4 gal.

Dissolve the sulphate of iron or copper in water by suspending in a bag a few hours in advance. Put the lime in a jar with water not quite enough to cover it. When the sulphate is dissolved and the lime slaked, add a little more water to make the latter into a milk, and then pour in the sulphate solution. Add the paraffin and churn the mixture with syringe to produce an emulsion. Then add the caustic soda, which if in powder should be broken up and dissolved separately before use. The whole wash should be well mixed, and may be applied in the form of a fine spray, but care should be taken not to let it drip on the ground or crops beneath. This wash may be used for most of the pests infesting the bark and shoots of fruit trees during the autumn and winter.

Horticultural sundriesmen supply numerous brands of patent insecticides and fungicides, such as cyllin, lysol, sodalin, VI and VII fluid, H. Emulsion, etc, and many cultivators often find it more convenient to purchase these in a state fit for immediate use, rather than go to the trouble of compounding their own solutions.