584 [ DISEASES OF THE VINE. 



chloride of lime, has proved to be a highly efficacious 

 remedy against vine-blight. Bordeaux mixture is an- 

 other good remedy against this disease, and is exten- 

 sively used in most vine-growing countries. The best 

 formula for Bordeaux mixture is probably that given 

 by Cavazza, which is the follo'wing. Fresh lime is 

 dissolved in sufficient quantity in water in a tub, 

 and stirred well to make a milky solution. This solu- 

 tion is allowed to rest for about one quarter of an 

 hour, and then it becomes clear, the excess of lime being 

 deposited at the bottom of the tub. Of this clear solution 

 of lime 100 litres are taken out into another tub, and 

 over it is poured a solution of sulphate of copper prepared 

 beforehand by dissolving completely 720 grammes of the 

 sulphate in some hot water and then allowing it to cool. 

 The mixture is stirred well, and should have a sky blue 

 colour, and though when sprayed on the foliage it is not 

 so visible as other heavier mixtures containing more lime 

 and sulphate of copper, it is very effective and economical, 

 is sprayed more easily because it contains no concretions 

 to choke the spraying apparatus, and is not so corrosive 

 to the spraying pump and to the clothes of the workman 

 as other mixtures. In the Burgundy mixture the lime is 

 substituted by soda, and in eau celeste ammonia is used 

 instead of lime or soda, but in any case the Bordeaux 

 mixture is certainly cheaper and is said to be more 

 efficient. Various brands of Bordeaux mixture are now 

 sold ready made, as well as dusting compounds such as 

 Strawsonite which are applied by means of a duster as a 

 fine powder. 



Grey mould of the Grape. This is due to the 

 ubiquitous Sclerotinia FuckeUama De Bary, an Ascomy- 

 cetous fungus belo-.gin.2f to the group Discomycetes, 

 which is generally met with, and described, in its coniclial 

 form of Bjtrytit d'tcrea IVrs. or I y o,'ycac:is cinerea Kunz. 

 The grey mould attacks the grapes when they are ripe or 



