TBE GRAPE. 167 



periments are made with various forms of cop- 

 per solutions, omitting the lime, in the hope 

 that an equally effective remedy may be found 

 without the objections in the use of lime. 



Sulphate of Copper (blue vitriol} alone is 

 sufficient to destroy the fungus, if the solution 

 is strong enough. But in this case there is 

 liabilitj' to injure the foliage. A modified 

 form of eau celeste, which consists of sulphate 

 of copper, carbonate of soda, and aqua ammo- 

 nia with water, has been found to be very 

 effectual. Still another form is the ammoni- 

 acal solution of the carbonate of copper, for 

 which there is a growing preference. The for- 

 mulas for these remedies will be found on 

 page 224. For an early washing or spraying 

 of trees or the vine, there can be no objection 

 to the use of the sulphate of copper alone, one 

 pound of the sulphate dissolved in ten gallons 

 of water. This strength would injure foliage. 



Anthracnose or Scab is a fungus which forms 

 hard and sunken brown or black patches on 

 the leaves. Spray as for the downy mildew. 



Black Rot is quite distinct from Brown Rot. 

 The fungus attacks the foliage and the berries, 

 and is very prevalent and destructive in warm 

 grape sections. In northern sections it is quite 

 limited. The same remedies as for the downy 

 mildew are a certain relief. 



