GOOSEBEIIRY RUST, OR LEAF-SPOT. 
143 
GOOSEBERRY RUST, OR LEAF-SPOT 
{Septoria vibes). 
By T. W. Kirk, F.L.S., &c., Biologist to the Government of Nbw 
Zealand. 
[The following Note has been kindly forwarded to us by the New Zealand Depart- 
ment of Agriculture.] 
This fungous disease caused considerable trouble in several quarters 
during last season. It attacks both gooseberries and currants. The first 
notice the gardener has of its presence is the appearance of small spots, 
usually of a brown colour, upon the leaves. If not attended to, these 
spots rapidly become more numerous, till the whole foliage is thickly 
covered. The result is that the leaves fall and the plants are left almost 
Fig. 38. — Upper and Under Surfaces of Leaves attacked by Spot-Fungus. 
bare, which greatly weakens them and reduces the following year's crop. 
As the disease usually appears late in the season, the plants should be 
sprayed with ammoniacal carbonate-of-copper solution. After the crop 
is off, Bordeaux mixture may be used, and should be again applied, full 
strength, before the buds break, early the following season, as a pre- 
ventive. All leaves should be raked up and burned. 
The following are the directions for making ammoniacal carbonate of 
copper, and Bordeaux mixture : — 
Bordeaux Mixture, ayi excellent standard formula, conve7iient for 
reducing to any required strength. 
Take sulphate of copper (perfectly pure), 6 lb. ; fresh unslaked lime, 
4 lb. ; water 22 gallons. Place the sulphate of copper in a piece of 
sacking or any light cloth. Suspend it by a string from the top of the 
barrel, a few inches below the surface of the water, to dissolve, using 18 
