GOOSEBERRY RUST, OR LEAF-SPOT. 
145 
Carhonate-of-copijer Solution. 
Procure a tub or barrel, and in this dissolve 6 lb. of copper-sulphate 
or bluestone, in 4 or 5 gallons of water. In another vessel dissolve 7 lb. 
of washing- or sal-soda, using hot water for the purpose. When the 
solution is cool, pour it slowly into the vessel containing the copper- 
sulphate liquid, stir the mixture thoroughly, then allow it to stand 
twenty-four hours. Now siphon off the clear liquid and allow the sedi- 
ment, which is carbonate of copper, to stand for a day or two, until it 
becomes pasty. For every 7 oz. of this paste add 3 pints of strong 
ammonia (which may be bought of any chemist), or enough to dissolve 
the sediment. Tiie liquid thus obtained is concentrated ammoniacal 
solution. To prepare it for spraying, it is only necessary to dilute 3 pints 
with 45 gallons of water. 
In order to avoid staining the fruit, &c., do not use more strong 
ammonia than is absolutely necessary to dissolve the carbonate of copper. 
A valuable fungicide. 
If the powder of carbonate of copper could be purchased, or the 
ammoniacal carbonate-of-copper solution put up in bottles, with instruc- 
tions, ready for diluting to standard strength, it would be convenient. 
To prepare the powder of carbonate of copper for use, first make into 
a thin paste by adding a pint and a half of water, then add slowly 3 pints 
of strong aqua ammoniae, and thoroughly stir until a clear, deep solution 
is obtained, when dilute with water to 45 gallons. 
GOOSEBERRY-LEAF MILDEW 
{MicrosphcEria grossularia) . 
By T. W. KinK, F.L.S., Biologist to the Government of New 
Zealand. 
[The following Note has been kindly forwarded to us by the New Zealand Depart- 
ment of Agriculture.] 
This is easily recognised, causing, as it does, the bushes to have a 
white patchy appearance, as though splashed with whitewash. It is 
caused by a surface-fungus which extracts nourishment from the leaves 
by means of tiny suckers. 
Spray with Bordeaux mixture ; or with sulphide of potassium, 1^ lb. 
to 50 gallons of v/ater ; or dust thoroughly on a fine hot day with finely 
powdered sulphur. 
