124 MAINE) AGRICULTURAL EXPERIMENT STATION. 1908. 



enough material to make a barrel of the mixture. The trouble 

 of preparing the mixture from lime and sulphate of copper is 

 slight. Enough lime to make 10 barrels of the mixture was 

 weighed out, slacked and strained by the writer in 23 minutes. 

 Making the copper sulphate solution takes practically no labor,, 

 although it will be several hours after it is suspended in the 

 water before it will be all dissolved." 



It is true today as when the above was written that the large 

 grower rarely, if ever, can afford to purchase prepared wet 

 Bordeaux mixtures at any price at which they have been or can 

 be offered. It is also true that, to say the least, freshly prepared 

 Bordeaux mixture is in fully as good form to serve as a fungi- 

 cide as old mixture. It apparently adheres to foliage better 

 than old. There seems, therefore, to be little or no reason for 

 the large grower to use ready made wet Bordeaux mixture. 

 The experiments conducted at this Station clearly indicate the 

 unwisdom of dust spraying for potatoes. Until some marked 

 advance shall have been made in the preparation of commercial 

 Bordeaux mixtures, wet or dry, they do not seem to fit in to the 

 economical and effective combatting of the fungous diseases of 

 the potatoes. 



